The Application Of Self Consolidating Concrete Scc In Full Scale Drilled Shafts
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The Application Of Self Consolidating Concrete Scc In Full Scale Drilled Shafts
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Author : Phillip Alain Gallet
language : en
Publisher:
Release Date : 2010
The Application Of Self Consolidating Concrete Scc In Full Scale Drilled Shafts written by Phillip Alain Gallet and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Concrete categories.
An Evaluation Of The Use Of Self Consolidating Concrete Scc For Drilled Shaft Applications
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Author : Joseph Donald Bailey
language : en
Publisher:
Release Date : 2005
An Evaluation Of The Use Of Self Consolidating Concrete Scc For Drilled Shaft Applications written by Joseph Donald Bailey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Concrete categories.
The Effectiveness Of Self Consolidating Concrete Scc For Drilled Shaft Construction
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Author :
language : en
Publisher:
Release Date : 2008
The Effectiveness Of Self Consolidating Concrete Scc For Drilled Shaft Construction written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Bridges categories.
Preparation And Testing Of Drilled Shafts With Self Consolidating Concrete
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Author : Hamdi Celik Ozyildirim
language : en
Publisher:
Release Date : 2012
Preparation And Testing Of Drilled Shafts With Self Consolidating Concrete written by Hamdi Celik Ozyildirim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Concrete categories.
In this study, self-consolidating concrete (SCC) was evaluated in drilled shafts and the integrity of drilled shafts was determined using cross-hole sonic logging (CSL), a low-strain nondestructive integrity testing technique. SCC has very high flowability. It was placed in the drilled shafts of the bridge on Route 28 over Broad Run in Bristow in Prince William County, Virginia. There were two bridges at the site; the one carrying the northbound traffic had drilled shafts using conventional concrete with high consistency (i.e., flowability). Half of the shafts of the bridge carrying the southbound traffic were cast with SCC. During placement, properties of the fresh concrete were tested and specimens were prepared to determine the hardened properties. The integrity of the shafts within the reinforcing cage was determined using CSL, with sonic echo/impulse response also used to evaluate several test shafts. The use of acousto-ultrasonic (AU) measurements to determine the cover depth outside the reinforcing cage was also evaluated during laboratory testing. In addition to the Route 28 shafts, three test shafts with conventional and SCC concretes were cast in an area headquarters. These shafts had intentional voids created through the use of sand bags and Styrofoam to investigate further the ability of the nondestructive test equipment. The results indicated that SCC is highly desirable for drilled shafts; it flows easily, filling the hole, and the removal of the temporary casing is facilitated by this highly workable material. CSL is a satisfactory nondestructive method to determine the integrity of shafts. Sonic echo/impulse response also showed promise as a method that complements CSL for determining the integrity of a shaft.
Development And Performance Of Fiber Reinforced Self Consolidating Concrete For Repair Applications
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Author : Fodhil Kassimi
language : en
Publisher:
Release Date : 2013
Development And Performance Of Fiber Reinforced Self Consolidating Concrete For Repair Applications written by Fodhil Kassimi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
The use of self-consolidating concrete (SCC) in the concrete industry in cast-in-place applications, including repair applications, is growing given the various advantages offered in both fresh and hardened states. The present study deals with the design and performance of fiber-reinforced self-consolidating concrete (FR-SCC) as a repair material of concrete infrastructure. The study also considers the use of various steel and synthetic fibers (five fibers in total) that were used to produce FR-SCC and fiber-reinforced self-consolidating mortar (FR-SCM) that can be employed for structural and non-structural repair applications. The study evaluates the effect of material properties and mixture composition of the fibrous concrete and mortar on workability, mechanical, visco-elastic, durability, and structural behavior. The investigation that is presented in this thesis included the testing of 28 full-scale beams under four-point flexural loading. The majority of these beams were repaired by casting concrete to fill a relatively thin section along the tension zone of the beams. The repair technique was based on the FR-SCC characteristics including the maximum fiber volume and length. This technique required mixtures of high range of fluidity. The optimized FR-SCC and FR-SCM mixtures exhibited excellent flow characteristics along the 3.2-m long beams without blockage, segregation, nor debonding at the interface of repair-substrate concrete. Based on the structural characteristics of the composite beams, the overall performance of the beams repaired using the FR-SCC and FR-SCM was similar or higher (up to 2.6 times) than that of monolithic beams made with conventional vibrated concrete (CVC). The use of optimized FRSCC mixtures enabled the replacement of 50% of the tension steel reinforcement in repair sections; i.e., the number of bars in the tension zone decreased from three bars to two bars with the addition of fibers in the SCC without mitigating structural performance. The degree of prediction of crack width, cracking load/moment, ultimate loads, and deflection of various FR-SCC and FR-SCM mixture was evaluated using several design and code models. The results indicate that these code models can provide safe predictions for crack and ultimate loads, as well as crack width of FR-SCC. The deflection of FR-SCC is unsafe but predictable by these code models. In total, 18 large-scale beams were tested in four-point for flexural creep. FR-SCC incorporating steel fibers combined with expansive agent provided overall performance up to 10 times of that obtained with CVC with the same fiber type and volume. The cracking under constant load was reduced by 60% to 80% using self-consolidating fibrous mixtures made with or without expansion agents, compared to SCC without fibers. The best combination to reduce the cracking potential when the restrained shrinkage ring test was employed was obtained with SCC mixtures made with steel fibers and expansive agent. Models were elaborated to predict the time-to-cracking for FR-SCC and FR-SCM mixtures based on mixture modulus of elasticity and drying and autogenous shrinkages. The project involved extensive testing of highly flowable fibrous materials to determine drying shrinkage (nearly 260 prisms), modulus of rupture (nearly 180 prisms), as well as compressive and splitting tensile strengths and elastic modulus (nearly 2100 cylinders). Based on the results, models were proposed to predict these key material properties that affect the performance of FR-SCC and FR-SCM used in repair applications. In addition to FR-SCC, the investigation also was set to evaluate the feasibility of using fiber-reinforced superworkable concrete (FR-SWC) in construction and repair applications. Such highly flowable concrete that requires limited vibration consolidation can represent some advantages over FR-SCC (lower admixtures demand, lower risk of segregation, greater robustness, lower formwork pressure, etc.). The energy needed to ensure proper consolidation, using either vibration or rodding, applied on samples made with FR-SWC was determined. The energy requirement took into consideration the development of mechanical properties, the resistance to segregation, and the development of proper surface quality. The study also demonstrated the higher overall structural performance of optimized FR-SWC compared to the corresponding FR-SCC mixtures. The findings of the thesis on the design and performance of highly workable fiber-reinforced cementitious materials should facilitate the acceptance of such novel high-performance material in infrastructure construction and repair applications.
Pro 42 1st International Rilem Symposium On Design Performance And Use Of Self Consolidating Concrete Scc 2005 China
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Author : Zhiwu Yu
language : en
Publisher: RILEM Publications
Release Date : 2005
Pro 42 1st International Rilem Symposium On Design Performance And Use Of Self Consolidating Concrete Scc 2005 China written by Zhiwu Yu and has been published by RILEM Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Concrete categories.
Final Report
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Author :
language : en
Publisher:
Release Date : 2016
Final Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
This report outlines the development of a self-consolidating concrete (also termed "self-compacting concrete" or SCC) so that concrete placement can be made into steel plate composite (SC) modular structures without the need for continuous concrete placement. As part of the research, SCC mixtures were developed and validated to ensure sufficient shear capacity across cold-joints, while minimizing shrinkage and temperature increase during curing to enhance concrete bonding with the steel plate construction found in modular units. The self-roughening concrete produced as part of this research was assessed in SC structures at three scales: small-scale shear-friction specimens, mid-scale beams tested in in-plane and out-of-plane bending, and a full-scale validation test using an SC module produced by Westinghouse as part of the Plant Vogtle expansion. The experiments show that the self-roughening concrete can produce a cold-joint surface of 0.25 inches (6 mm) without external vibration during concrete placement. The experiments and subsequent analysis show that the shear friction provisions of ACI 318-14, Section 22.9 can be used to assess the shear capacity of the cold-joints in SC modular construction, and that friction coefficient of 1.35 is appropriate for use with these provisions.
Design Production And Placement Of Self Consolidating Concrete
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Author : Kamal Henri Khayat
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-08-12
Design Production And Placement Of Self Consolidating Concrete written by Kamal Henri Khayat and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-08-12 with Technology & Engineering categories.
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.
Comparison Of Conventional And Self Consolidating Concrete For Drilled Shaft Construction
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Author : Tyson David Rupnow
language : en
Publisher:
Release Date : 2015
Comparison Of Conventional And Self Consolidating Concrete For Drilled Shaft Construction written by Tyson David Rupnow and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Concrete piling categories.
Investigation Of The Performance Of Self Consolidating Concrete In Drilled Shafts
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Author : Andrew Hall (Engineer)
language : en
Publisher:
Release Date : 2011
Investigation Of The Performance Of Self Consolidating Concrete In Drilled Shafts written by Andrew Hall (Engineer) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Concrete piling categories.