Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Effects Of North Carolina Recycled Aggregates On The Mechanical Properties Of Concrete
Download Effects Of North Carolina Recycled Aggregates On The Mechanical Properties Of Concrete full books in PDF, epub, and Kindle. Read online Effects Of North Carolina Recycled Aggregates On The Mechanical Properties Of Concrete ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Effects of North Carolina Recycled Aggregates on the Mechanical Properties of Concrete by : Danial G. Fisher
Download or read book Effects of North Carolina Recycled Aggregates on the Mechanical Properties of Concrete written by Danial G. Fisher and published by . This book was released on 1996 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties of Concrete Made with North Carolina Recycled Coarse and Fine Aggregates by : Shuaib Haroon Ahmad
Download or read book Properties of Concrete Made with North Carolina Recycled Coarse and Fine Aggregates written by Shuaib Haroon Ahmad and published by . This book was released on 1996 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, recycled coarse and fine aggregates were obtained from a portion of concrete pavement which was removed from Interstate 40 in North Carolina. Various amounts of recycled coarse and fine aggregates were volumetrically substituted for natural coarse and fine aggregates of a control mixture. The effects on plastic and hardened concrete properties were investigated.
Book Synopsis Mechanical Properties of Concrete Products Utilizing Recycled Concrete Aggregates by : Cory J. Shorkey
Download or read book Mechanical Properties of Concrete Products Utilizing Recycled Concrete Aggregates written by Cory J. Shorkey and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Recycled Concrete Aggregate on the Mechanical Properties of Concrete by : Tannous Touma
Download or read book Effect of Recycled Concrete Aggregate on the Mechanical Properties of Concrete written by Tannous Touma and published by . This book was released on 2015 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties of Concrete Made with North Carolina Recycled Coarse and Fine Aggregates by : Shuaib Haroon Ahmad
Download or read book Properties of Concrete Made with North Carolina Recycled Coarse and Fine Aggregates written by Shuaib Haroon Ahmad and published by . This book was released on 1996 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, recycled coarse and fine aggregates were obtained from a portion of concrete pavement which was removed from Interstate 40 in North Carolina. Various amounts of recycled coarse and fine aggregates were volumetrically substituted for natural coarse and fine aggregates of a control mixture. The effects on plastic and hardened concrete properties were investigated.
Book Synopsis Integrated Design and Environmental Issues in Concrete Technology by : K. Sakai
Download or read book Integrated Design and Environmental Issues in Concrete Technology written by K. Sakai and published by CRC Press. This book was released on 2014-04-21 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The two themes of integration of structural and durability design, and integration of concrete technologies in relation to global environmental issues are drawn together in this book. It presents the views of distinguished international researchers and engineers on these key topics as the 21st century approaches. Derived from a workshop on rational
Book Synopsis Evaluation of the Effects of Recycled Aggregates on the Properties of High Performance Concrete by : Andreu Gonzàlez Corominas
Download or read book Evaluation of the Effects of Recycled Aggregates on the Properties of High Performance Concrete written by Andreu Gonzàlez Corominas and published by . This book was released on 2016 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades, the use of High Performance Concrete (HPC) has grown vastly, being used in multiple applications with high requirements. However, the use of recycled aggregates (RA) has been mostly limited to conventional concrete. Many studies have defined limiting properties of RA, replacement ratios of natural aggregates and particular techniques to achieve suitable conventional concrete containing RA. Nonetheless, very few studies have been focused on the use of RA in the production of HPC. This study examines the behaviour of High Performance Recycled Aggregate Concrete (HPRAC) in physical, mechanical, durability and structural properties according to the RA content and its quality. RA were sourced from Construction and Demolition Waste of several categories: Recycled Concrete Aggregate (RCA) obtained from 40, 60 and 100 MPa concretes, Ceramic Waste Aggregates (CWA) and Recycled Mixed Aggregates (RMA). In the first experimental phase, the limiting replacement ratios of RA were established in order to achieve comparable HPRAC to the reference HPC with a design strength of 100 MPa. The physical, mechanical and durability properties were studied for concretes containing 20, 50 and 100% of coarse RCA and RMA, and 15 and 30% of fine CWA. According to the mechanical properties, 100% of coarse RCA can be used, as long as RA is sourced from a 60 MPa minimum-strength concrete waste. Nevertheless, durability behaviour was more influenced by the use of RA and replacement ratios of RCA could only be maintained on those obtained from parent concretes with the same quality as the new HPC. Moreover, significant reductions of the RA quality (RCA sourced from 40MPa - strength concretes or RMA) only permitted 20% replacement ratios. On the other hand, the concretes containing fine CWA (up to 30%) reached higher performances than those from conventional HPC. On the second experimental phase, fly ash was used in replacement of 30% of Portland cement in order to enhance the RCA performance. Keeping in mind prestressed concrete as potential application which requires high early-age strength, the concrete mixtures were also subjected to an initial steam curing cycle. The natural aggregates could be completely replaced by RCA sourced from the same quality HPC, producing improved mechanical properties and pore structures. It was determined that when using lower quality aggregates, the use of steam curing was mandatory to fulfil the standard requirements for prestressed concrete. The steam curing had negative effects on the long-term mechanical properties, however the steam-cured HPRAC had greater improvements on the pore structure and the mechanical properties than conventional HPC. The third experimental phase assesses the role of RCA in internal curing whose effect is significant in HPC. The effects of RCA were investigated in the plastic, autogenous and drying shrinkage of HPC, being the second of special interest in concretes with low water-cement ratio. The results revealed that the plastic and drying shrinkage became higher as the quality of the RCA decreased and the replacement ratio increased. However, a reduction in the autogenous shrinkage was proved to be possible by the use of a high content of lower quality RCA, since they acted as internal curing agents. The suitable behaviour of the HPRAC mixtures containing 50 and 100% of RCA sourced from 100 MPa-strength concretes enabled the production of prestressed concrete sleepers. The structural properties of HPRAC were tested on the conventional HPC and on both HPRAC sleepers. The prestressed concrete sleepers were subjected to static and dynamic load tests at rail-seat and centre sections. The structural requirements for prestressed concrete sleepers were extensively verified by sleepers made with HPRAC. Regardless of the replacement ratio, the HPRAC sleepers' results barely differed from those of conventional HPC sleepers.
Book Synopsis New Trends in Recycled Aggregate Concrete by : Jorge de Brito
Download or read book New Trends in Recycled Aggregate Concrete written by Jorge de Brito and published by MDPI. This book was released on 2019-07-15 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the result of a Special Issue published in Applied Sciences, entitled “New Trends in Recycled Aggregate Concrete". It identifies emerging research areas within the field of recycled aggregate concrete and contributes to the increased use of this eco-efficient material. Its contents are organised in the following sections: Upscaling the use of recycled aggregate concrete in structural design; Large scale applications of recycled aggregate concrete; Long-term behaviour of recycled aggregate concrete; Performance of recycled aggregate concrete in very aggressive environments; Reliability of recycled aggregate concrete structures; Life cycle assessment of recycled aggregate concrete; New applications of recycled aggregate concrete.
Book Synopsis Mechanical Properties of Concrete with Recycled Aggregate by : Mohd Khairul Ikhwan Abd Raof
Download or read book Mechanical Properties of Concrete with Recycled Aggregate written by Mohd Khairul Ikhwan Abd Raof and published by . This book was released on 2009 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Mechanical Properties of Recycled Aggregate Concrete by : Sajjad Ali Khan
Download or read book Evaluation of Mechanical Properties of Recycled Aggregate Concrete written by Sajjad Ali Khan and published by . This book was released on 2005 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanical Properties of Recycled Aggregate Concrete by : Engr. Muhammad Shahid
Download or read book Mechanical Properties of Recycled Aggregate Concrete written by Engr. Muhammad Shahid and published by LAP Lambert Academic Publishing. This book was released on 2011-09 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable development is gaining recognition around the globe these days. Governments are under pressure, on many fronts, to drive in sustainable development in policies, practice, and operations to secure the planet's future. Adding to this, increased populations, and the need for more infrastructures, have unfortunately led to the unacceptable depletion of raw materials, increasing amounts of construction waste and increased deterioration of the natural environment in many places worldwide. Demolition of existing concrete structures produces a massive quantity of Recycled Aggregate (RA). RA mainly composed of two materials of different nature: natural aggregate and bonded mortar. Presently, due to lack of confidence on the quality and properties of RA, it is being used in low-quality concrete, sub-grade applications and as filling material. Literature shows that Bonded Mortar Content (BMC) is responsible for higher water absorption and porosity of RA. Consequently, it is necessary to determine the BMC for reuse in making Recycled Aggregate Concrete (RAC). The objective of this book is to determine the BMC accurately and to relate to the RAC properties.
Book Synopsis Applied Engineering Sciences by : Wei Deng
Download or read book Applied Engineering Sciences written by Wei Deng and published by CRC Press. This book was released on 2015-01-02 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume contains selected papers presented at the 2014 AASRI International Conference on Applied Engineering Sciences, held in Hollywood, LA, USA. Contributions cover the latest developments and advances in the field of Applied Engineering Sciences.
Book Synopsis Systematic Approach of Characterisation and Behaviour of Recycled Aggregate Concrete by : M. Chakradhara Rao
Download or read book Systematic Approach of Characterisation and Behaviour of Recycled Aggregate Concrete written by M. Chakradhara Rao and published by Springer. This book was released on 2018-12-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the utilisation of construction waste material as coarse aggregate in making concrete. It discusses in detail the behaviour of recycled aggregate under impact load along with other structural applications, and explains the various quality-improvement techniques for recycled aggregate and recycled aggregate concrete (RAC). The first chapter describes the importance of recycling construction and demolition waste and the status quo of global construction and demolition waste recycling. The second chapter examines the recycled aggregate production methodology. Subsequent chapters address the physical and mechanical characteristics and different research findings, as well as the engineering properties of recycled aggregate concrete. Further, the interrelationships among the mechanical properties of recycled aggregate concrete are discussed. The book also explores long-term properties like shrinkage and creep, durability properties, and microstructural characterisation. It will serve as a valuable resource for researchers and professionals alike.
Book Synopsis Effect of Recycled Aggregate from Concrete Waste on Concrete Compressive Strength by : Haliza Mohd Jeffery Ong
Download or read book Effect of Recycled Aggregate from Concrete Waste on Concrete Compressive Strength written by Haliza Mohd Jeffery Ong and published by . This book was released on 2010 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of Recycled Aggregate Concrete of Equal Compressive Strength in Reinfornced Concrete Beams by : Arastoo Hedayatnasab
Download or read book The Use of Recycled Aggregate Concrete of Equal Compressive Strength in Reinfornced Concrete Beams written by Arastoo Hedayatnasab and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One area for sustainable engineering is the efficient use of recycled aggregates obtained from construction and demolition and also as by-products derived from industrial waste that optimises economic and environmental benefits. For the past five decades, studies on the effect of coarse recycled aggregates (RCA) on properties of concrete have been going on, and in fact, none of them reported that good quality coarse RCA, from the mechanical point of view, is unsustainable for structural use. However, according to the limits stated in BS EN 8500 part 2 (2006), at least 87% of the coarse RCA shall be obtained by crushing old hardened concrete debris. As it was impossible to obtain such good quality aggregates from existing plants, coarse recycled aggregate (RA*) containing 60% of coarse RCA, 10% asphalt, 10% brick, 15% unbound aggregate, and 5% fines and other materials was used in this study. The main aim of this study was to determine and compare the structural properties of natural aggregate concrete (NAC) and recycled aggregate concrete (RAC) of equal compressive strength by using different percentage of course RA* and to investigate the suitability of coarse RA* for use in steel-reinforced concrete elements. The study was carried out in three phases. Phase 1 involved the characterisation of the aggregates through a testing regime which include physical and mechanical assessments to study their possible application in concrete production. It was found that the aggregates were suitable to produce normal concrete. For the Phase 2, the effect of the coarse RA* content (up to 100%) on the main properties of concrete was investigated. The results showed that there was a gradual decrease in slump (up to 24%), compressive strength (up to 21%), flexural strength (up to 10%) and modulus of elasticity (up to 30%) as the percentage of coarse RA* increased up to 100%. Thereafter, NA concrete and RA concrete with the same slump and compressive strength made with 100% Portland cement (PC) only and also with a combination of 70% PC and 30% pulverised fuel ash (PFA), were produced. Flexural strength, modulus of elasticity, drying shrinkage, and creep were determined and compared. The compressive strength of RA concretes was increased by lowering the w/c ratio through reducing the free water content. For the Phase 3, pull-out test was carried out using 16mm and 20mm reformed bars embedded in concrete cylinders made with equal strength NA and RA concretes to investigate the bonding strength. It was discovered that the coarse RA* content had no significant effect on the values of pull-out force. Then, for studying flexural properties (cracking load, ultimate load, deflection, strain in rebar, strain in concrete, and pattern of cracks) of steel-reinforced recycled concrete (RRC) beams, two types of beam sections (under-reinforced and over-reinforced) were made with equal strength NA and RA concretes and tested. It was discovered that the difference in ultimate load values was negligible. Although higher deflections were observed for RA beams, the deflections were still within acceptable limits. Overall, it was concluded that, the flexural behaviour of steel-RRC beams made with equal strength concrete is not considerably affected by the presence of coarse RA*, as well as PFA, and the differences were minor with no practical significance. However, due to effect of coarse RA* on the shrinkage and creep strains, their use in structural elements prone to such deformations may require some special considerations.
Book Synopsis Effect of Recycled Concrete Aggregate Properties on the Behaviour of New Concrete by : Faraz Ahimoghadam
Download or read book Effect of Recycled Concrete Aggregate Properties on the Behaviour of New Concrete written by Faraz Ahimoghadam and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Application of recycled concrete aggregates (RCA) has increased recently as a sustainable alternative in concrete construction. Although application of RCA has substantially grown over the past decades, issues related to its structural performance and long-term behaviour still prevent its widespread application, especially in structural purposes. In this study, a new mixture proportioning method called the "Equivalent Volume (EV)" method is proposed for RCA concrete, which is developed on the assumption that the RCA mix is based on a companion conventional concrete mix having the same volume of "cement paste and aggregates" as the companion mixture. RCA mixes containing different aggregate types and mechanical properties were designed using the EV method. Chemical, mechanical and non-destructive tests were performed and their performance was investigated. Finally, a quality control protocol for evaluating the suitability of RCA sources for structural applications is proposed. Results show that the EV method seems a promising approach to mix-proportion eco-friendly recycled concrete mixes. Moreover, the RCA type and properties seem to influence in the behaviour of RCA concrete and thus should be accounted in the mix- design.
Book Synopsis Recycled Aggregate Concrete Structures by : Jianzhuang Xiao
Download or read book Recycled Aggregate Concrete Structures written by Jianzhuang Xiao and published by Springer. This book was released on 2017-11-13 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes how, given the global challenge of a shortage of natural resources in the 21st century, the recycling of waste concrete is one of the most important means of implementing sustainable construction development strategies. Firstly, the book presents key findings on the micro- and meso-structure of recycled aggregate concrete (RAC), while the second part focuses on the mechanical properties of RAC: the strength, elastic modulus, Poisson’s ratio, stress-strain curve, etc. The third part of the book explores research on the durability of RAC: carbonization, chloride penetration, shrinkage and creep. It then presents key information on the mechanical behavior and seismic performance of RAC elements and structures: beams, columns, slabs, beam-column joints, and frames. Lastly, the book puts forward design guidelines for recycled aggregate concrete structures. Taken as a whole, the research results – based on a series of investigations the author has condu cted on the mechanical properties, durability and structural performance of recycled aggregate concrete (RAC) over the past 10 years – demonstrate that, with proper design and construction, it is safe and feasible to utilize RAC structures in civil engineering applications. The book will greatly benefit researchers, postgraduates, and engineers in civil engineering with an interest in this field.
