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Effects On Flexural Performance Of Sawing Plain Concrete And Of Sawing And Other Methods Of Altering The Degree Of Fiber Alignment In Fiber Reinforced Concrete
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Book Synopsis Effects on Flexural Performance of Sawing Plain Concrete and of Sawing and Other Methods of Altering the Degree of Fiber Alignment in Fiber-Reinforced Concrete by : CD. Johnston
Download or read book Effects on Flexural Performance of Sawing Plain Concrete and of Sawing and Other Methods of Altering the Degree of Fiber Alignment in Fiber-Reinforced Concrete written by CD. Johnston and published by . This book was released on 1989 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bulk of the paper deals with a comparison of the flexural performance of 102-mm (4-in.)-square standard molded specimens with corresponding specimens of the same size produced either by sawing the bottom (tension) surface of a 102 by 152-mm (4 by 6-in.) cross section or by sawing the bottom and sides of a 152 by 152 mm (6 by 6-in.) cross section. The performance of plain concrete is discussed in terms of its flexural strength under third-point loading [ASTM Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading) (C 78)]. The conclusion is that sawing need not adversely affect the measured strength when done carefully with proper equipment. The performance of fiber-reinforced concrete is discussed in terms of changes in first-crack strength and toughness parameters defined according to ASTM Test Method for Flexural Toughness and First-Crack Strength of Fiber-Reinforced Concrete (Using Beam with Third Point Loading) (C 1018). The majority of the results deal with changes in those parameters that are associated with differences in fiber alignment between the molded and sawed specimens. The results of two other small studies involving differences in fiber alignment are also included. In the first, alignment is varied by inserting steel plates in the freshly mixed concrete during consolidation, and in the second by using the same length of fiber in 102-mm (4-in.) and 152-mm (6-in.) cross sections. The conclusion is that preferential fiber alignment by the mold surfaces can increase first-crack strength and toughness indices. To avoid undue influence of fiber alignment in small specimens on flexural test data determined in accordance with Method C 1018, the ratio of minimum specimen cross section to fiber length should not be less than 3.0, except perhaps when strict compliance with this criterion means using specimens larger than 152 mm (6 in.) square.
Book Synopsis Testing of Fiber Reinforced Concrete by :
Download or read book Testing of Fiber Reinforced Concrete written by and published by . This book was released on 1995 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cement, Concrete and Aggregates by :
Download or read book Cement, Concrete and Aggregates written by and published by . This book was released on 1987 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by and published by . This book was released on 1989 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CANMET Report by : Canada Centre for Mineral and Energy Technology
Download or read book CANMET Report written by Canada Centre for Mineral and Energy Technology and published by . This book was released on 1992 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Rheology of Fresh Concrete by : G. H. Tattersall
Download or read book The Rheology of Fresh Concrete written by G. H. Tattersall and published by Pitman Advanced Publishing Program. This book was released on 1983 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-performance Hybrid-fibre Concrete by : Ivan Marković
Download or read book High-performance Hybrid-fibre Concrete written by Ivan Marković and published by IOS Press. This book was released on 2006 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In the research project presented in this PhD-thesis, an innovative type of fibre concrete is developed, with improved both the tensile strength and the ductility: the Hybrid-Fibre Concrete (HFC). The expression "Hybrid" refers to the "hybridisation" of fibres: short and long steel fibres were combined together in one concrete mixture. This is opposite to conventional steel fibre concretes, which contain only one type of fibre. The basic goal of combining short and long fibres is from one side to improve the tensile strength by the action of short fibres, and from the other side to improve the ductility by the action of long fibres." "In this research project, all important aspects needed for the development and application of Hybrid-Fibre Concrete have been considered. In total 15 mixtures, with different types and amounts of steel fibres were developed and tested in the fresh state (workability) as well as in the hardened state (uniaxial tensile tests, flexural tests, pullout tests of single fibres and compressive tests). A new analytical model for bridging of cracks by fibres was developed and successfully implemented for tensile softening response of HFC. At the end, the utilisation of HFC in the engineering practice was discussed, including a case-study on light prestressed long-span beams made of HFC."--BOOK JACKET.
Book Synopsis Analysis and Performance of Fiber Composites by : Bhagwan D. Agarwal
Download or read book Analysis and Performance of Fiber Composites written by Bhagwan D. Agarwal and published by Wiley-Interscience. This book was released on 1990-10-08 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Having fully established themselves as workable engineering materials, composite materials are now increasingly commonplace around the world. Serves as both a text and reference guide to the behavior of composite materials in different engineering applications. Revised for this Second Edition, the text includes a general discussion of composites as material, practical aspects of design and performance, and further analysis that will be helpful to those engaged in research on composites. Each chapter closes with references for further reading and a set of problems that will be useful in developing a better understanding of the subject.
Book Synopsis Performance-based Design of Self-Compacting Fibre Reinforced Concrete by : Steffen Grünewald
Download or read book Performance-based Design of Self-Compacting Fibre Reinforced Concrete written by Steffen Grünewald and published by Delft University Press. This book was released on 2004-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Concrete Technology by : Adam M. Neville
Download or read book Concrete Technology written by Adam M. Neville and published by . This book was released on 2010 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The success of any concrete structure depends on the designer's sound knowledge of concrete and its behaviour under load, under temperature and humidity changes, and under exposure to the relevant environment and industrial conditions. This book gives students a thorough understanding of all aspects of concrete technology from first principles. It covers concrete ingredients, properties and behaviour in the finished structure with reference to national standards and recognised testing methods used in Britain, the European Union and the United States. Examples and problems are given throughout to emphasise the important aspects of each chapter. An excellent coursebook for all students of Civil Engineering, Structural Engineering and Building at degree or diploma level, Concrete Technology will also be a valuable reference book for practising engineers in the field.
Book Synopsis Design of Slabs-on-ground by : ACI Committee 360
Download or read book Design of Slabs-on-ground written by ACI Committee 360 and published by American Concrete Institute. This book was released on 2006 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Fibre Spatial Characteristics on the Flexural Performance of SFRC by : Tiaan Bosman
Download or read book The Influence of Fibre Spatial Characteristics on the Flexural Performance of SFRC written by Tiaan Bosman and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The addition of discontinuous discrete fibres to concrete has repeatedly been shown as an effective method to overcome the inherently brittle nature of concrete. The resulting composite has enhanced toughness and impact resistance and is broadly referred to as Fibre-Reinforced Concrete (FRC). Although the benefits of implementing FRC are evident, the high variability associated with FRC has frequently been cited as a characteristic stunting vast structural application of the material. This research is focussed on the spatial distribution of fibres and the way it affects flexural performance. A thorough understanding of the influence of fibre spatial distribution on composite performance is the first step in incorporating fibre distribution into material and structural design procedures and aids the pursuit of effective and optimal implementation of FRC in practice. The study was aimed at not only investigating the influence of fibre distribution on flexural performance but also evaluating the effect of fibre length and volume content on the fibre spatial characteristics. The experimental framework considered two hook-ended steel fibres with different lengths incorporated into a 50 MPa concrete mixture at volume contents ranging from 40 kg/m3 to 120 kg/m3. Flexural response was obtained using three-point bending tests on notched specimen, after which each specimen was cut adjacent to the crack plane and prepared for image analysis. An image processing algorithm was developed to automatically extract the fibre locations that were used to describe the fibre spatial characteristics. Spatial distribution was explored by evaluating the uniformity of fibres across a section, the inter-batch variability of fibre distribution, and the degree of clustering. A geometric descriptor of fibre spacing was defined using Voronoi diagrams generated from image data and employed in a unique approach developed for quantifying fibre spatial characteristics. An alternative approach was developed and used to compare the spatial metrics resulting from the Voronoi approach. The findings of the study highlight the role of fibre length and content on the spatial distribution of fibres and it is revealed that the sectional uniformity, inter-batch spatial variability, and degree of clustering are dependent on the number of fibres in the cross section. Furthermore, the results demonstrate the substantial influence of fibre distribution on the flexural performance of FRC. It is concluded that the variability in flexural strength reduces as the variation in fibre spatial distribution reduces and that extensive clustering has an adverse effect on the effective resistance provided by fibres.
Download or read book Highway Research Abstracts written by and published by . This book was released on 1992 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Textile Reinforced Cement Composites by : Jan Wastiels
Download or read book Textile Reinforced Cement Composites written by Jan Wastiels and published by MDPI. This book was released on 2020-03-05 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue presents the latest advances in the field of Textile-Reinforced Cement Composites, including Textile-Reinforced Concrete (TRC), Textile-Reinforced Mortar (TRM), Fabric-Reinforced Cementitious Matrix (FRCM), etc. These composite materials distinguish themselves from other fibre-reinforced concrete materials by their strain-hardening behaviour under tensile loading. This Special Issue is composed of 14 papers covering new insights in structural and material engineering. The papers include investigations on the level of the fibre reinforcement system as well as on the level of the composites, investigating their impact and fatigue behaviour, durability and fire behaviour. Both the strengthening of existing structures and the development of new structural systems such as lightweight sandwich systems are presented, and analysis and design methods are discussed. This Special Issue demonstrates the broadness and intensity of the ongoing advancements in the field of Textile-Reinforced Cement composites and the importance of several future research directions.
Download or read book Popular Mechanics written by and published by . This book was released on 1964-04 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Popular Mechanics inspires, instructs and influences readers to help them master the modern world. Whether it’s practical DIY home-improvement tips, gadgets and digital technology, information on the newest cars or the latest breakthroughs in science -- PM is the ultimate guide to our high-tech lifestyle.
Book Synopsis Fracture Mechanics and Structural Concrete by : B. L. Karihaloo
Download or read book Fracture Mechanics and Structural Concrete written by B. L. Karihaloo and published by Longman Publishing Group. This book was released on 1995-01 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of fracture mechanics in resolving problems in the design of concrete structures is becoming more widely accepted and utilized as current codes cannot always be applied satisfactorily to design conditions. There is wide-ranging technical literature available on the subject but to date there is no readily accessible and systematic source to meet the needs of present practitioners and future designers. Fracture Mechanics and Structural Concrete addresses this need. The book provides a simple and straightforward study of fracture mechanics relating to concrete design and promotes its usage by highlighting the shortcomings of current design codes. It explains how fracture mechanics can overcome certain design problems, such as minimum reinforcement, punching shear failure and the influence of structural size upon shear capacity. Professional engineers, researchers and academics will find Fracture Mechanics and Structural Concrete an essential introduction to the subject. It will also be useful to postgraduate and final-year undergraduate students of civil engineering.
Book Synopsis Size Effects in Flexural Toughness of Fiber Reinforced Concrete by : Zhengwu Jiang
Download or read book Size Effects in Flexural Toughness of Fiber Reinforced Concrete written by Zhengwu Jiang and published by . This book was released on 2010 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of specimen size on measured flexural toughness of fiber reinforced concrete (FRC) remains largely unknown. Towards this end, an experimental program was carried out where flexural toughness tests were performed on specimens of two different sizes using ASTM C1609/C1609M-07 test procedure. Two specimen sizes of 100x100x350 mm3 and 150x150x500 mm3 were tested. A hybrid polymeric fiber at three fiber dosage rates of 3.0, 4.5, and 6.0 kg/m3 was investigated. Results indicate that the specimen size affects not only the toughness properties but also the variability in data as quantified by the coefficient of variation (COV). Size effect was more pronounced in the early part of the load-deflection curve and decreased with an increase in the fiber volume fraction. At a given fiber volume fraction, the COV, moduli of rupture, and post-crack residual strengths were all higher for the specimens of smaller size. Finally, the small size specimens showed a greater deflection hardening than the large size specimens. The last conclusion is significant in that deflection hardening is now often cited as the required performance characteristic of high performance FRC, and this property may depend more on the size of the specimens than on the composite itself.
