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Development Of A Mix Design Adjustment Method For Fiber Reinforced Concrete And Super High Performance Concrete Based On Excess Paste
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Book Synopsis Development of a Mix Design Adjustment Method for Fiber Reinforced Concrete and Super High-performance Concrete Based on Excess Paste by : Joe Malloy
Download or read book Development of a Mix Design Adjustment Method for Fiber Reinforced Concrete and Super High-performance Concrete Based on Excess Paste written by Joe Malloy and published by . This book was released on 2019 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this study was to develop a mix design adjustment method for Fiber Reinforced Concrete (FRC) that would maintain appropriate workability while improving hardened concrete performance. A literature review was conducted to examine existing methods for adjusting mix designs to account for fiber introduction. It was found that while increasing fine aggregate and cement paste content can make up for lost workability with the addition of fibers, no rational mix design adjustment method is available. Reference mix designs from the Nevada Department of Transportation and the Nebraska Department of Transportation were used, and this study focused on tailoring the idea of increasing paste and fine aggregate to focus on the parameter of excess paste. Excess paste serves to coat the aggregate particles and is critical for workability. To apply this method of excess paste adjustment, a modified version of ASTM C29 was used to determine the void content of fiber-aggregate skeletons with varying fiber contents. Paste and fine aggregate content were then adjusted to maintain the excess paste quantity between reference mixes and mixes with fiber. A variety of tests including slump, vibrated L-box, compressive strength, splitting tensile strength, flexural strength, drying shrinkage, and restrained shrinkage were conducted to evaluate the overall concrete performance. Results indicated that, for each mix design, adjusting based on excess paste provided a workable FRC with improved hardened performance. Eight slabs were then prepared for a large-scale examination of constructability. Throughout the study of FRC, an alternative concrete to Ultra-High Performance Concrete (UHPC) that would considerably outperform High-Performance Concrete (HPC) was developed. This study delves into the development of a new type of concrete called Super High Performance Concrete (SHPC). SHPC is a high strength, self-consolidating FRC that would significantly cut back on cost and production limitations compared to UHPC as it can be produced with conventional drum-type mixers. Results indicate that SHPC outperforms HPC in matters of workability, compressive strength, flexural strength, and toughness and could potentially be a viable alternative of UHPC for applications such as bridge deck connections and overlays.
Book Synopsis Proposal of a Mix Design Method for Low Cement Fiber Reinforced Concrete by : Mohd Nabil Eid
Download or read book Proposal of a Mix Design Method for Low Cement Fiber Reinforced Concrete written by Mohd Nabil Eid and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete, the second most used material in the world, presents great performance and economic benefits. Yet, it is often characterized by a brittle behaviour, low tensile strength, and toughness. Fibers are usually added to concrete to counteract its brittle behaviour, increasing ductility and toughness, controlling crack propagation and delaying concrete failure. However, their addition significantly worsens the fresh state performance of the material. To improve fresh state of the so-called Fiber Reinforced Concrete (FRC), conventional mix-design methods recommend the use of high paste content, which results in a significant increase of Portland cement (PC) content and raises the carbon footprint of the material. The latter is responsible for 8% of the global annual carbon dioxide (CO2) anthropogenic emissions. Given the current worldwide concerns on global warming, the construction industry is in a need to lessen the demand, and thus production of PC. Recent studies have been focusing on the use of advanced mix-design techniques (i.e. particle packing models- PPMs) along with Inert Fillers (IF) as an alternative to reduce PC content in concrete. However, the latter was not applied to conventional FRC. In this work, advanced mix design techniques (i.e. PPMs) are used to overcome the aforementioned issues and mix-proportion eco-efficient FRC with low cement content (
Book Synopsis Design of Fiber Reinforced Concrete for Pumping by : Douglas W. Ounanian
Download or read book Design of Fiber Reinforced Concrete for Pumping written by Douglas W. Ounanian and published by . This book was released on 1976 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mix Development of PLC-based Ultra-high Performance Fibre Reinforced Concrete and Characterization of Key Mechanical Properties and Time-Dependent Behaviour by : Bingyue Shao
Download or read book Mix Development of PLC-based Ultra-high Performance Fibre Reinforced Concrete and Characterization of Key Mechanical Properties and Time-Dependent Behaviour written by Bingyue Shao and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis proposes a new Ultra-high Performance Fibre Reinforced Concrete (UHPFRC) mix design developed and optimized with the aim of lowering environmental and economic cost while achieving better performance. Instead of plain Portland Cement, the proposed mix uses Portland Limestone Cement (PLC) with 6-15 % of limestone, as a means to reduce the gross cement content. The optimized mix design features 10% of silica fume and 30% of ground granulated blast-furnace slag, 2.5% of steel fibres by the total volume, and very low water-to-binder ratio. The proposed mix is validated and characterized through a comprehensive experimental program, which shows that at 56 days the proposed mix can achieve a compressive strength at least 130 MPa, an average peak flexural stress of 27 MPa, and an average peak uni-axial tensile strength of 10 MPa. Tests also show that the proposed mix has satisfactory performance in shrinkage, resistance of chloride ion penetration, and freeze-thaw resistance.
Book Synopsis Aggregates in Concrete by : Mark Alexander
Download or read book Aggregates in Concrete written by Mark Alexander and published by CRC Press. This book was released on 2010-02-25 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together in one volume the latest research and information, this book provides a detailed guide to the selection and use of aggregates in concrete. After an introduction defining the purpose and role of aggregates in concrete, the authors present an overview of aggregate sources and production techniques, followed by a detailed study of their physical, mechanical and chemical properties. This knowledge is then applied to the use of aggregates in both plastic and hardened concretes, and in the overall mix design. Special aggregates and their applications are discussed in detail, as are the current main specifications, standards and tests.
Book Synopsis Development of Ultra-High Performance Concrete against Blasts by : Chengqing Wu
Download or read book Development of Ultra-High Performance Concrete against Blasts written by Chengqing Wu and published by Woodhead Publishing. This book was released on 2018-03-19 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of Ultra-High Performance Concrete against Blasts: From Materials to Structures presents a detailed overview of UHPC development and its related applications in an era of rising terrorism around the world. Chapters present case studies on the novel development of the new generation of UHPC with nano additives. Field blast test results on reinforced concrete columns made with UHPC and UHPC filled double-skin tubes columns are also presented and compiled, as is the residual load-carrying capacities of blast-damaged structural members and the exceptional performance of novel UHPC materials that illustrate its potential in protective structural design. As a notable representative, ultra-high performance concrete (UHPC) has now been widely investigated by government agencies and universities. UHPC inherits many positive aspects of ultra-high strength concrete (UHSC) and is equipped with improved ductility as a result of fiber addition. These features make it an ideal construction material for bridge decks, storage halls, thin-wall shell structures, and other infrastructure because of its protective properties against seismic, impact and blast loads. Focuses on the principles behind UHPC production, properties, design and detailing aspects Presents a series of case studies and filed blast tests on columns and slabs Focuses on applications and future developments
Author :National Research Council (U.S.). Highway Research Information Service Publisher : ISBN 13 : Total Pages :1090 pages Book Rating :4.3/5 (91 download)
Book Synopsis HRIS Abstracts by : National Research Council (U.S.). Highway Research Information Service
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Information Service and published by . This book was released on 1976 with total page 1090 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Committee on Nonconventional Concrete Technologies for Renewal of the Highway Infrastructure Publisher :National Academies Press ISBN 13 :0309562317 Total Pages :125 pages Book Rating :4.3/5 (95 download)
Book Synopsis Nonconventional Concrete Technologies by : Committee on Nonconventional Concrete Technologies for Renewal of the Highway Infrastructure
Download or read book Nonconventional Concrete Technologies written by Committee on Nonconventional Concrete Technologies for Renewal of the Highway Infrastructure and published by National Academies Press. This book was released on 1997-04-08 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonconventional Concrete Technologies: Renewal of the Highway Infrastructure identifies research and development opportunities in innovative, nonconventional materials and processes that have the potential to accelerate the construction process, improve the durability of highway pavement and bridges, and enhance the serviceability and longevity of new construction under adverse conditions.
Book Synopsis Handbook of Alkali-Activated Cements, Mortars and Concretes by : F. Pacheco-Torgal
Download or read book Handbook of Alkali-Activated Cements, Mortars and Concretes written by F. Pacheco-Torgal and published by Elsevier. This book was released on 2014-11-20 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an updated state-of-the-art review on new developments in alkali-activation. The main binder of concrete, Portland cement, represents almost 80% of the total CO2 emissions of concrete which are about 6 to 7% of the Planet’s total CO2 emissions. This is particularly serious in the current context of climate change and it could get even worse because the demand for Portland cement is expected to increase by almost 200% by 2050 from 2010 levels, reaching 6000 million tons/year. Alkali-activated binders represent an alternative to Portland cement having higher durability and a lower CO2 footprint. Reviews the chemistry, mix design, manufacture and properties of alkali-activated cement-based concrete binders Considers performance in adverse environmental conditions. Offers equal emphasis on the science behind the technology and its use in civil engineering.
Book Synopsis Design, Production and Placement of Self-Consolidating Concrete by : Kamal Henri Khayat
Download or read book Design, Production and Placement of Self-Consolidating Concrete written by Kamal Henri Khayat and published by Springer Science & Business Media. This book was released on 2010-08-12 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dear Colleagues, We are pleased to organize the Sixth International RILEM Symposium on SCC and the Fourth North-American Conference on the Design and Use of SCC, held on Sept 26-29, 2010 in Montreal, Quebec, Canada. The RILEM series of symposia started in 1999 in Stockholm, followed by Tokyo in 2001, Reykjavik in 2003, Chicago in 2005, and Ghent in 2007 with a steadily increasing number of papers, participants, and interest from across the globe. Due to the growing success of SCC, regional conferences have been organized, such as the North-American Conference on the Design and Use of SCC held in Chicago in 2002, 2005, and 2008; the International Symposium on Design, Performance and Use of SCC held nd in Changsa, China in 2005 and in Beijing, China in 2009; as well as the 2 International Conference on Advances in Concrete Technology in the Middle East: SCC held in Abu Dhabi in 2009. It can be concluded that these regional Conferences and Symposia were highly successful and reached a far more international audience than anticipated. Nearly 100 papers were submitted for these proceedings from which the International Scientific Committee selected 37 contributions covering a wide range of timely and original subjects from around the world. We would like to acknowledge the input of the International Scientific Committee for providing critical input to guarantee high quality of these peer-reviewed proceedings. We invite you to explore a wealth of information in the electronic proceedings.
Book Synopsis Using Cement Paste Rheology to Predict Concrete Mix Design Problems by : Anal K. Mukhopadhyay
Download or read book Using Cement Paste Rheology to Predict Concrete Mix Design Problems written by Anal K. Mukhopadhyay and published by . This book was released on 2009 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The complex interaction between cement and chemical/mineral admixtures in concrete mixture sometimes leads to unpredictable concrete performance in the field, which is generally defined as concrete incompatibilities. Cement paste rheology measurements instead of traditional workability tests can have a great potential to detect those incompatibilities in concrete before the concrete is placed to avoid setting time, workability, and curing-related issues, which sometimes leads to severe early-age cracking especially in severe weather conditions. The objective of the present study was to examine the applicability of the Superpave Dynamic Shear Rheometer (DSR) to measure cement paste rheology in one hand and identify cement and mineral/chemical admixtures incompatibilities based on cement paste rheological behavior on the other hand. Based on the extensive laboratory investigation, it is observed that DSR in modified form can measure cement paste rheology with permissible repeatability and sensitivity and has a great potential to identify cement and mineral/chemical admixture incompatibilities. The heat of hydration data from isothermal calorimeter test and setting time results for the studied mixtures have strongly supported the rheology-based observations. A procedure to formulate rheology-based acceptance criteria has been developed based on the available test results. Further refinement of these acceptance criteria based on detailed work covering a wide range of incompatibilities and validation through implementation efforts is warranted. This will ultimately help concrete producers and district laboratories to detect problematic combinations of concrete ingredients during the mixture design process. The researchers also investigated t he feasibility of the mini slump cone test as an alternative or supporting tool for the rheology test.
Book Synopsis Guide for Specifying, Proportioning, Mixing, Placing, and Finishing Steel Fiber Reinforced Concrete by : ACI Committee 544
Download or read book Guide for Specifying, Proportioning, Mixing, Placing, and Finishing Steel Fiber Reinforced Concrete written by ACI Committee 544 and published by . This book was released on 1998 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Control of Concrete Mixtures by : Steven H. Kosmatka
Download or read book Design and Control of Concrete Mixtures written by Steven H. Kosmatka and published by . This book was released on 1988 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portland Cement Association reference, dealing with fundamentals, cold weather concreting, curing, admixtures, aggregates, mixing, and much more.
Book Synopsis Development and Evaluation of High Performance Fiber Reinforced Concrete as a Repairing Material by : Manish Roy
Download or read book Development and Evaluation of High Performance Fiber Reinforced Concrete as a Repairing Material written by Manish Roy and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-performance Fiber-reinforced Concrete in Infrastructural Repair and Retrofit by : Neven Krstulovic-Opara
Download or read book High-performance Fiber-reinforced Concrete in Infrastructural Repair and Retrofit written by Neven Krstulovic-Opara and published by . This book was released on 2000 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improved Understanding of Ultra-high Performance Concrete Via Mechanical Property Testing of Mixes with Varying Ingredients and Proportions by : Ashley Suzanne Carey
Download or read book Improved Understanding of Ultra-high Performance Concrete Via Mechanical Property Testing of Mixes with Varying Ingredients and Proportions written by Ashley Suzanne Carey and published by . This book was released on 2019 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis evaluated constituent proportions on mechanical and thermal properties of ultra-high performance concrete. This thesis assessed how fine aggregates and fibers at varying proportions enhance cement paste and can improve its mechanical properties to a desired compressive strength, elastic modulus, or tensile strength. Approximately 400 specimens, comprised of 22 different mixtures, were tested for mechanical properties within four curing regimes. Thermal experiments were also performed on select specimens. These experiments aimed to add to the body of knowledge found during literature review which showed these efforts have drawn conclusions by varying one ingredient at a time, whereas this thesis systematically varied multiple ingredients. Results showed compressive strength to be due to synergistic relationships between cement paste, fine aggregates, and steel fibers where absence of any ingredient reduced strength. Tensile strength and elastic modulus were dominated by one ingredient, and steel fibers were shown as promising to lessen thermal gradients.
Book Synopsis Autogenous Shrinkage of Concrete by : Ei-ichi Tazawa
Download or read book Autogenous Shrinkage of Concrete written by Ei-ichi Tazawa and published by CRC Press. This book was released on 1999-01-28 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book forms the proceedings of a workshop held in Hiroshima in June 1998 and derive from the work of a Technical Committee of the Japan Concrete Institute. Topics include test and prediction methods, the science of autogenous shrinkage, strain and stress, and consequent design concerns.
