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Cost Effective High Performance Self Consolidating Concrete For Sustainable Structures
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Book Synopsis Cost Effective High Performance Self Consolidating Concrete for Sustainable Structures by : Adnan Shaheryar Syed
Download or read book Cost Effective High Performance Self Consolidating Concrete for Sustainable Structures written by Adnan Shaheryar Syed and published by . This book was released on 2011 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Research in Sustainable Structures by : Hugo Rodrigues
Download or read book Recent Research in Sustainable Structures written by Hugo Rodrigues and published by Springer Nature. This book was released on 2019-11-01 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, about challenges in structural and bridge engineering, brings together contributions to this important area of engineering research. The book presents findings and case studies on fundamental and applied aspects of structural engineering, applied to buildings, bridges, and infrastructures, in general heritage patrimony. The scope of the book focuses on the application of advanced experimental and numerical techniques and new technologies to the built environment.
Book Synopsis Self-consolidating Concrete (SCC) and High-volume Fly Ash Concrete (HVFAC) for Infrastructure Elements by : John J. Myers
Download or read book Self-consolidating Concrete (SCC) and High-volume Fly Ash Concrete (HVFAC) for Infrastructure Elements written by John J. Myers and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of its unique nature, self-consolidating concrete (SCC) has the potential to significantly reduce costs associated with transportation- related infrastructure, benefiting both MoDOT and the residents of Missouri. SCC is a highly flowable, nonsegregating concrete that can be placed without any mechanical consolidation, and thus has the following advantages over conventional concrete: decreased labor and equipment costs during concrete placement, decreased potential for and costs to repair honeycombing and voids, increased production rates of precast and cast-in-place (CIP) elements, and improved finish and appearance of cast and free concrete surfaces. In addition to SCC, innovative materials, such as high-volume fly ash concrete (HVFAC), also provide a significant potential to produce more cost effective mix designs for CIP concrete. Since the 1930’s, fly ash – a pozzolanic material – has been used as a partial replacement of portland cement in concrete to improve the material’s strength and durability, while also limiting the amount of early heat generation. From an environmental perspective, replacing cement with fly ash reduces the concrete’s overall carbon footprint and diverts an industrial by-product from the solid waste stream (currently, about 40 percent of fly ash is reclaimed for beneficial reuse and 60 percent is disposed of in landfills). The objective of this research was to provide an implementation test bed and showcase for the use of sustainable and extended service life concrete. In this implementation study for Missouri Bridge A7957, a level of 50% fly ash to cement proportions was utilized as well as normal strength self-consolidating concrete (NS-SCC) and high-strength self-consolidating concrete (HS-SCC) in its primary carrying elements to showcase the use of these innovative materials. This study focused on monitoring the serviceability and structural performance, both short-term and long-term, of the bridge in an attempt to investigate the in-situ behavior of the NS-SCC, HS-SCC and also the HVFAC mixtures. Consequently, to compare and demonstrate the potential benefits and savings of using NS-SCC, HS-SCC and HVFAC in the first Missouri DOT large-scale bridge structure, this study undertook ten tasks including the following: Task 1: Pre-Construction Planning and Construction Coordination; Task 2: Development of Bridge Instrumentation Plan & Load Testing Plan (Bridge A7957); Task 3: Mix Design and Quality Control Procedures/Quality Assurance – Trial Mixes; Task 4: Shear Testing and Evaluation of HS-SCC Precast NU Girders; Task 5: Precast-Prestressed Plant Specimen Fabrication and Instrumentation; Task 6: Field Cast-In-Place Elements and Instrumentation; Task 7: Hardened Properties of Plant and Field Produced Concrete; Task 8: Bridge Load Testing and Monitoring/Evaluation of Experimental Load Testing Results; Task 9: Reporting/Technology Transfer; Task 10: Value to MoDOT and Stakeholders to Implementing SCC/HVFAC. The final report consists of a summary report and four technical reports. The findings, conclusions and recommendations of the study can be referenced within these reporting components.
Book Synopsis Eco-efficient concrete by : E. Güneyisi
Download or read book Eco-efficient concrete written by E. Güneyisi and published by Elsevier Inc. Chapters. This book was released on 2013-02-04 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since ordinary self-compacting concrete (SCC) is usually associated with high material costs due to its high binder and chemical admixture content, researchers are currently attempting to produce SCC with high volumes of supplementary cementitious materials (SCMs), to make it cost effective and more durable. The SCMs used in this type of SCC, namely fly ash (FA), ground-granulated blast furnace slag (GGBFS), silica fume (SF), metakaolin (MK) etc., are generally industrial by-products and waste materials. A subsidiary effect of this SCC composition is to conserve the environment and non-renewable natural material resources. This chapter reviews the current literature on fresh properties of SCC containing high-volume SCMs, and explains the effect of high-volume SCMs on the mechanical and durability-related properties of SCC.
Book Synopsis High-Performance Eco-Efficient Concrete by : Carlos Thomas
Download or read book High-Performance Eco-Efficient Concrete written by Carlos Thomas and published by MDPI. This book was released on 2021-05-26 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to “High-Performance Eco-Efficient Concrete” and concrete fatigue behavior, more sustainable construction materials, capable of complying with quality standards and current innovation policies, aimed at saving natural resources and reducing global pollution. The development of self-compacting concretes with electric arc furnace slags is a further achievement. In addition, the technical and economic viability of using coarse recycled aggregates from crushed concrete in shotcrete, enhanced quality and reduced on-site construction time are the basic features of prefabricated bridge elements and systems, biomass bottom ash as aluminosilicate precursor and phosphogypsum were discussed. On the other hand, basalt fiber improving the mechanical properties and durability of reactive powder concrete, alkali-activated slag and high-volume fly ash and the potential of phosphogypsum as secondary raw material in construction industry, the effects of fly ash on the diffusion, bonding, and microproperties of chloride penetration in concrete were studied. Increasing amounts of sustainable concretes are being used as society becomes more aware of the environment. Finally, the circular economy as an economic model of production and consumption that involves reusing, repairing, refurbishing, and recycling materials after their service life are presented in this book.
Book Synopsis PRO 42: 1st International RILEM Symposium on Design, Performance and Use of Self-Consolidating Concrete - SCC'2005, China by : Zhiwu Yu
Download or read book PRO 42: 1st International RILEM Symposium on Design, Performance and Use of Self-Consolidating Concrete - SCC'2005, China written by Zhiwu Yu and published by RILEM Publications. This book was released on 2005 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Innovative Structural Applications of High Performance Concrete Materials in Sustainable Construction by : Fausto Minelli
Download or read book Innovative Structural Applications of High Performance Concrete Materials in Sustainable Construction written by Fausto Minelli and published by Mdpi AG. This book was released on 2022-06-20 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete is the most widely utilized construction material in the world. Thus, any action intended to enhance the sustainability of the construction industry must consider the supply chain, production, distribution demolition and eventual disposal, landfilling or recycling of this composite material. High-performance concrete may be one of the most effective options to make the construction sector more sustainable. Experience proves that the use of recycled concrete aggregates, as well as the partial replacement of ordinary Portland cement with other supplementary cementitious materials or alternative binders, are generally accepted as the most realistic solutions to reduce the environmental impacts, leading to sufficiently high mechanical performances. In structural applications such as those concerning the seismic and energy retrofitting of existing buildings, the use of high-performance cementitious composites often represents the more cost-effective solution, which allows us to minimize the costs of the intervention and the environmental impact. Eventually, the challenge of enhancing sustainability by raising durability of concrete structures is particularly relevant in those applications where maintenance is particularly expensive and impactful, in terms of both direct intervention costs and indirect costs deriving from downtime. The present Special Issue aims at providing readers with the most recent research results on the aforementioned subjects and further foster a collaboration between the scientific community and the industrial sector on a common commitment towards sustainable concrete constructions.
Book Synopsis Development, Durability Studies and Application of High Performance Green Hybrid Fiber-Reinforced Concrete (HP-G-HyFRC) for Sustainable Infrastructure and Energy Efficient Buildings by : Rotana Hay
Download or read book Development, Durability Studies and Application of High Performance Green Hybrid Fiber-Reinforced Concrete (HP-G-HyFRC) for Sustainable Infrastructure and Energy Efficient Buildings written by Rotana Hay and published by . This book was released on 2015 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete-related construction industry consumes considerable amount of energy, resulting in large CO2 release into the atmosphere. Cement which is used as the main binder in concrete is energy intensive to produce and contributes about 7% to total global anthropogenic carbon emission. Infrastructure across the globe suffers from durability problems and requires frequent repair and maintenance. This brings about high direct cost for rehabilitation and unaccounted indirect cost resulted from loss of productive time, traffic congestion and diversion, and in the process more CO2 emission. In the meantime, buildings which are part of the overall civil infrastructure system require extensive amount of energy to keep the internal environment comfortable to users. The sector accounts for about 40% of global primary energy consumption. With increasing population and demand, actions from various building disciplines are needed to build a more sustainable industry. This research addresses these issues through the development of a new high performance fiber-reinforced concrete, its durability studies and its application to reduce operational energy in buildings. Durability is critical for infrastructure systems whose frequent maintenance and rehabilitation pose adverse impacts to the environment and add considerable costs to the economy. By accounting for sustainability aspects from materials conception to usage and disposal, this study encompasses the concept of sustainability through life cycle consideration. This represents a deviation from conventional sustainable approach where a focus is usually spent on reducing embodied energy of concrete composites. The first area of focus was on the development of a new concrete composite called high performance green hybrid fiber-reinforced concrete (HP-G-HyFRC) reinforced with polyvinyl alcohol (PVA) micro- and hooked-end steel macrofibers. For easy construction and durability, the design criteria were defined to cover high workability, high strength and deflection hardening which is defined as an ability of the composite to carry increasing load after the first crack is formed. It was demonstrated that theoretical analysis could be used to limit the number of trials in determining the critical fiber volume fractions for the deflection hardening behavior in the composite. As compared to conventional self-consolidating concrete (SCC), fine aggregate over coarse aggregate ratio had to be increased in FRC for enhanced workability. Addition of supplementary cementitious materials (SCMs) in concrete especially fly ash helped to improve the composite's workability. This is attributed to fly ash's favorable fineness, size distribution and spherical shape which resulted in ball-bearing action provided to other concrete constituents. PVA microfibers controlled propagation of micro cracks inherent in concrete or formed during loading. They also provided toughening around steel fibers and ensured a gradual pullout of steel fibers. The synergy of PVA micro- and steel macrofibers led to a smooth deflection hardening behavior of the composite under flexure at a relatively low fiber volume fractions of 1.5% steel fibers and 0.15% PVA fibers. A study on corrosion performance of HP-G-HyFRC with accelerated corrosion test with an impressed current was then conducted. It was found that wide cracks ranging from 1.1 to 2 mm were observed in high performance concrete (HPC) without fibers. The presence of hybrid fibers in HP-G-HyFRC, on the other hand, reduced corrosion rates by half, attributable to crack bridging of fibers and the resulting formation of distributed cracks of small sizes. Also, under no applied current, all embedded steel rebars in HP-G-HyFRC were in the inactive corrosion zone even with the presence of 4% NaCl in the mixing water. Microscopic observation at steel-concrete interface showed a densification of corrosion products, which is postulated to limit iron dissolution and subsequently to reduce corrosion rates of the embedded bars. HP-G-HyFRC corrosion samples were also able to retain most of its strength after the accelerated corrosion tests. As corrosion resistance of HP-G-HyFRC was considered at a composite level, the effects of individual mix component such as slag and fibers on corrosion were yet unknown. The next area of focus was on the influence of high-volume slag as cement replacement, hybrid fibers and steel-concrete interface on corrosion of steel in concrete. The studies elaborated various phenomena observed in the corrosion study of HP-G-HyFRC and also provided a fundamental understanding of different concrete parameters on corrosion. It was found that due to shrinkage-induced cracking and possibly poor quality passive film due to the presence of reducing agents in concrete pore solutions, samples with 60% slag replacement and with no fiber reinforcement showed an early corrosion initiation and higher mass loss induced by the impressed current. Microstructural imaging showed that the samples with slag, despite having a higher gas permeability, showed a denser matrix but more continuous distributed microcracking in the matrix. This led to its poor ability to accommodate corrosion products at the interface and as a result the concrete experienced an early onset of cracking. Under the same regime of applied current, samples made of slag concrete also experienced higher gravimetric mass losses. This is attributed to a less stable passive film and more intense acidification at the interface due to a reduction in calcium hydroxide (CH) in the matrix. Also, an inclusion of hybrid fibers in concrete slightly increased concrete permeability although this did not adversely affect corrosion initiation performance of concrete. However, under propagation stage achieved by an induced current, hybrid fibers in concrete significantly reduced corrosion rates through confinement and densification of corrosion products at steel-concrete interface. The influence of interface qualities on corrosion of steel in concrete showed conflicting performance in corrosion initiation and propagation stages. It was found that higher porosity at the steel-concrete interface initiated an early corrosion. However, the porous interface could accommodate more corrosion products. This led to a smaller pressure buildup from the corrosion products and less damage to the surrounding concrete. As a result, smaller corrosion rates were observed in the samples with more porous interfaces after impressed current regimes. The finding helps to explain the more extensive damage in high performance concrete (HPC) as compared to normal strength concrete. This warrants the inclusion of fibers in HPC to extend the service life of structures constructed with the composite. The study ended with a proposed application of HP-G-HyFRC in an innovative double skin façade (DSF) system in place of a conventional solid façade system to enhance operational energy performance of buildings. It was found that although the DSF is more energy intensive and more costly to construct, it allowed for a full recovery of the additional embodied energy within the first year of operation and cost recovery within the first 6 years of operation. The overall study exemplifies a life-cycle consideration adopted for materials design, durability investigation and application to ensure more sustainable infrastructure and buildings for our society.
Book Synopsis Self-Compacting Concrete: Materials, Properties and Applications by : Rafat Siddique
Download or read book Self-Compacting Concrete: Materials, Properties and Applications written by Rafat Siddique and published by Woodhead Publishing. This book was released on 2019-11-19 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-Compacting Concrete: Materials, Properties and Applications presents the latest research on various aspects of self-compacting concrete, including test methods, rheology, strength and durability properties, SCC properties at elevated temperature, SC manufacturing with the use of SCMs, recycled aggregates and industrial by-products. Written by an international group of contributors who are closely associated with the development of self-compacting concrete, the book explores the main differences between SCC and normal concrete in terms of raw materials, fresh properties and hardened properties. Other topics discussed include the structure and practical applications of fiber reinforced SCC. Researchers and experienced engineers will find this reference to be a systematic source to SCC with its accounting of the latest breakthroughs in the field and discussions of SCC constructability, structural integrity, improved flows into complex forms, and superior strength and durability. Offers a systematic and comprehensive source of information on the latest developments in SCC technology Includes mix design procedures, tests standards, rheology, strength and durability properties Explores the properties and practical applications of SCC
Book Synopsis Development and Characterization of Sustainable Self-Consolidating Concrete Containing High Volume of Limestone Powder and Natural Or Calcined Pozzolanic Materials by : Kemal Celik
Download or read book Development and Characterization of Sustainable Self-Consolidating Concrete Containing High Volume of Limestone Powder and Natural Or Calcined Pozzolanic Materials written by Kemal Celik and published by . This book was released on 2015 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon dioxide emission from ordinary Portland cement manufacturing is one of the major sustainability issues facing the concrete industry. In fact, the annual worldwide CO2 emission from cement manufacturing is nearly 7% of the global emissions. Roughly 60% of these emissions come from the calcination of limestone, the main raw material for making Portland-cement clinker. The remaining CO2 emission is as a result of fuel combustion required to generate the heat necessary for the reactions forming clinker. Although considerable gains in energy efficiency have been achieved during the production of cement for the last two decades, calcination of limestone is the major concern as a source of CO2 emissions. Utilization of high-volume of by-products or natural pozzolanic material, such as basaltic ash pozzolan or fly ash as a replacement of Portland cement clinker, is a possible approach to reduce the clinker factor of Portland cement. In addition, self-consolidating concrete mixtures are being increasingly used for the construction of highly reinforced complex concrete elements and for massive concrete structures such as thick foundation due to its technical advantages such as shortened placement time, labor savings, improved compaction, and better encapsulation of rebar. Self-consolidating concrete requires utilization of high dosage of a plasticizing agent or viscosity-modifying chemical admixtures. The purpose of this study is to develop highly flowable self-consolidating concrete mixtures made of high proportions of cement replacement materials such as basaltic ash pozzolan, fly ash and pulverized limestone instead of high dosage of a plasticizer or viscosity-modifying admixtures, and characterize the effects of Portland cement replacement on the strength and durability. The two replacement materials used are high-volume finely-ground basaltic ash, a Saudi Arabian aluminum-silica rich basaltic glass and high-volume Class-F fly ash, from Jim Bridger Power Plant, Wyoming US. As an extension of the study, limestone powder was also used to replace Portland cement, alongside finely-ground basaltic ash and Class-F fly ash, forming ternary blends. Along with compressive strength tests, non-steady state chloride migration, water absorption and gas permeability tests were performed, as durability indicators, on self-consolidating concrete (SCC) specimens. The results were compared to two reference concretes; 100% ordinary Portland cement and 85% ordinary Portland cement - 15% limestone powder by weight. The high-volume of basaltic pozzolan and fly ash concrete mixtures showed strength and durability results comparable to those of the reference concretes at later ages; identifying that both can effectively be used to produce low-cost and environment-friendly self-consolidating concrete without utilizing viscosity-modifying admixture. Even though the slump flow diameter of SCC specimens was held in the similar range by utilizing varied amount of water reducer admixture, they were not identical. To enable a precise comparison among the specimens, the mortar specimens were produced that had same cement-replacement ratios with the ones in SCC specimens utilizing basaltic ash pozzolan (NP), Class-F fly ash (FA) and limestone powder without using water reducer admixture. Overall the binary and ternary FA samples had higher strength than NP mortar samples up to 1 year. This can be attributed to the higher pozzolanic reactivity of FA compared to NP which is supported by X-ray diffraction, isothermal calorimetry and thermogravimetric analysis. The normal consistency and setting time of the mixtures were determined. It showed that cement replacement with limestone powder in the ternary blended cements containing either basaltic ash pozzolan or Class-F fly ash along with ordinary Portland cement lowered the initial and final time of setting relative to the binary blended cements containing similar ratio of cement replacement. Also, the water demand of mixtures incorporate with basaltic ash pozzolan was greater than the one with Class-F fly ash. The influence of the basaltic ash pozzolan, Class-F fly ash and limestone powder in the binary and ternary Portland cement blends is discussed, while following the physicochemical changes such as crystalline transition, hydration kinetics, and mechanical property that are a direct result of the addition of supplementary cementitious material or filler. Selected cement pastes were characterized by X-ray diffraction (XRD), petrographic microscopy and scanning electron microscopy with energy dispersive spectroscopy, isothermal calorimetry and thermogravimetric analysis (TGA). Integrating these techniques helps to understand the fresh and hardened properties of concretes and brings new insight into the effect of basaltic ash pozzolan, Class-F fly ash and limestone powder on the hydration of Portland cement. Isothermal calorimetry analysis presents that the addition of limestone powder, for instance, increased the rate of hydration reaction relative to the control specimen. This suggests that as a result of the further participation of aluminate phases in hydration reaction, the hydration products were improved. This outcome was confirmed with the analysis of XRD results by the finding carboaluminates in the limestone powder containing blended cements. It is important to note that the enhancement of hydration reaction was not adequate to compensate for the dilution effect due to addition of limestone powder. While the replacement of ordinary Portland cement with Class-F fly ash retarded the rate of hydration reaction relative to the one with basaltic ash pozzolan at first, the reactivity of Class-F fly ash improved after 2 days of hydration and surpassed the cumulative heat of hydration of basaltic ash pozzolan. This result is supported by TGA analysis demonstrating that the mixtures containing Class-F fly ash had more hydrate water with respect to the one of with basaltic ash pozzolan. XRD analysis showed that the addition of limestone powder in the ternary cement containing either basaltic ash pozzolan or fly ash led to stabilize the transformation of ettringite to monosulfate and introduce the carboaluminates in the hydration products. TGA analysis indicated that the degree of pozzolanic reaction of fly ash was higher than the one with basaltic ash in the binary and ternary blended mixtures. For a comprehensive analysis and quantification of emissions and global warming potential (GWP) from concrete production, life-cycle assessment was used on the concrete mixture containing Class-F fly ash. It is found that high volume, up to 55% by weight replacement of ordinary Portland cement with Class-F fly ash, or Class-F fly ash and limestone powder produces highly workable concrete that has high 28-day and 365-day strength, and extremely high to very high resistance to chloride penetration along with low GWP for concrete production.
Book Synopsis Sustainable Bridge Structures by : Khaled Mahmoud
Download or read book Sustainable Bridge Structures written by Khaled Mahmoud and published by CRC Press. This book was released on 2015-08-07 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ever-increasing traffic demands, coupled with deteriorating condition of bridge structures, present great challenges for maintaining a healthy transportation network. The challenges encompass a wide range of economic, environmental, and social constraints that go beyond the technical boundaries of bridge engineering. Those constraints compound
Book Synopsis Eco-Efficient Concrete by : Fernando Pacheco-Torgal
Download or read book Eco-Efficient Concrete written by Fernando Pacheco-Torgal and published by Elsevier. This book was released on 2013-02-04 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eco-efficient concrete is a comprehensive guide to the characteristics and environmental performance of key concrete types.Part one discusses the eco-efficiency and life cycle assessment of Portland cement concrete, before part two goes on to consider concrete with supplementary cementitious materials (SCMs). Concrete with non-reactive wastes is the focus of part three, including municipal solid waste incinerator (MSWI) concrete, and concrete with polymeric, construction and demolition wastes (CDW). An eco-efficient approach to concrete carbonation is also reviewed, followed by an investigation in part four of future alternative binders and the use of nano and biotech in concrete production.With its distinguished editors and international team of expert contributors, Eco-efficient concrete is a technical guide for all professionals, researchers and academics currently or potentially involved in the design, manufacture and use of eco-efficient concrete. The first part of the book examines the eco-efficiency and life cycle assessment of Portland cement concrete Chapters in the second part of the book consider concrete with supplementary cementitious materials, including properties and performance Reviews the eco-efficient approach to concrete carbonation
Book Synopsis Ultra-High Performance Concrete and High Performance Building Materials for Sustainable Construction by : Ekkehard Fehling
Download or read book Ultra-High Performance Concrete and High Performance Building Materials for Sustainable Construction written by Ekkehard Fehling and published by BoD – Books on Demand. This book was released on 2024-01-01 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable construction, with the overarching goal of reducing the environmental footprint of everything we build is becoming increasingly important and urgent in the light of the climate change the world is facing. The use of innovative and sustainable building materials, especially concrete as the worldwide most commonly used building material, offers a great opportunity to significantly reduce climate-relevant emissions in the construction sector. Due to their performance and reliable durability, the use of innovative high-performance concretes will help to reduce the need for new constructions and to sustainably repair existing infrastructure. In new buildings in particular, the use of high-performance materials can help to save energy and natural resources, which reduces climate-relevant emissions and thus global warming. With the current HiPerMat 6, we are responding to the growing understanding of the impact of our construction activities on the environment by placing greater emphasis on sustainability issues.
Book Synopsis Development of Sustainable High-Strength Self-Consolidating Concrete Utilising Fly Ash, Shale Ash and Microsilica by : Pui-Lam Ng
Download or read book Development of Sustainable High-Strength Self-Consolidating Concrete Utilising Fly Ash, Shale Ash and Microsilica written by Pui-Lam Ng and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With high flowability and passing ability, self-consolidating concrete (SCC) does not require compaction during casting and can improve constructability. The favourable properties of SCC have enabled its widespread adoption in many parts of the world. However, there are two major issues associated with the SCC mixes commonly used in practice. First, the cement content is usually at the high side. Since the production of cement involves calcination at high temperature and is an energy-intensive process, the high cement content imparts high embodied energy and carbon footprint to the SCC mixes. Besides, the exothermic reaction of cement hydration would cause high heat generation and early thermal cracking problem that would impair structural integrity and necessitate repair. Second, the strength is usually limited to around grade 60, which is considered as medium strength in nowadays achievable norm. With a view to develop sustainable high-strength self-consolidating concrete (HS-SCC), experimental research utilising fly ash (FA), shale ash (SA), and microsilica (MS) in the production of SCC has been conducted, as reported herein.
Book Synopsis Proceedings of the International Conference of Sustainable Production and Use of Cement and Concrete by : Jose Fernando Martirena-Hernandez
Download or read book Proceedings of the International Conference of Sustainable Production and Use of Cement and Concrete written by Jose Fernando Martirena-Hernandez and published by Springer. This book was released on 2019-06-21 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gathers the latest advances, innovations and applications presented by leading international researchers and engineers at the International Conference on Sustainable Production and Use of Cement and Concrete (ICSPCC 2019), held in Villa Clara, Cuba on June 23-30, 2019. It covers highly diverse topics, including sustainable production of low-carbon cements, novelties in the development of supplementary cementitious materials, new techniques for the microstructural characterization of construction materials, Portland-based and alkaline-activated cementitious systems, development of additives and additions in the sustainable production of concrete, sustainable production of high-performance concrete, durable concrete produced with recycled aggregates, development of mortars for historical patrimony restoration, environmental and economic assessment of the production and use of cement. The contributions, which were selected by means of a rigorous, international peer-review process, highlight numerous exciting ideas that will inspire novel research directions and foster multidisciplinary collaboration between different specialists.
Book Synopsis Self-Compacting Concrete by : Ahmed Loukili
Download or read book Self-Compacting Concrete written by Ahmed Loukili and published by John Wiley & Sons. This book was released on 2013-02-07 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-Compacting Concrete (SCC) is a relatively new building material. Nowadays, its use is progressively changing the method of concrete placement on building sites. However, the successful use of SCC requires a good understanding of the behavior of this material, which is vastly different from traditional concrete. For this purpose, a lot of research has been conducted on this area all over the world since 10 years. Intended for both practitioners and scientists, this book provides research results from the rheological behavior of fresh concrete to durability.
Book Synopsis Chapter Development of Sustainable High-Strength Self-Consolidating Concrete Utilising Fly Ash, Shale Ash and Microsilica by : PL Ng
Download or read book Chapter Development of Sustainable High-Strength Self-Consolidating Concrete Utilising Fly Ash, Shale Ash and Microsilica written by PL Ng and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With high flowability and passing ability, self-consolidating concrete (SCC) does not require compaction during casting and can improve constructability. The favourable properties of SCC have enabled its widespread adoption in many parts of the world. However, there are two major issues associated with the SCC mixes commonly used in practice. First, the cement content is usually at the high side. Since the production of cement involves calcination at high temperature and is an energy-intensive process, the high cement content imparts high embodied energy and carbon footprint to the SCC mixes. Besides, the exothermic reaction of cement hydration would cause high heat generation and early thermal cracking problem that would impair structural integrity and necessitate repair. Second, the strength is usually limited to around grade 60, which is considered as medium strength in nowadays achievable norm. With a view to develop sustainable high-strength self-consolidating concrete (HS-SCC), experimental research utilising fly ash (FA), shale ash (SA), and microsilica (MS) in the production of SCC has been conducted, as reported herein.
