Self-compacting Concrete (SCC) for Prestressed Bridge Girders PDF Download
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Author: Bulent Erkmen
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 347
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Book Description
Researchers conducted an experimental program to investigate the viability of producing self-consolidating concrete (SCC) using locally available aggregate, and the viability of its use in the production of precast prestressed concrete bridge girders for the State of Minnesota. Six precast prestressed bridge girders were cast using four SCC and two conventional concrete mixes. Variations in the mixes included cementitious materials (ASTM Type I and III cement and Class C fly ash), natural gravel and crushed stone as coarse aggregate, and several admixtures. The girders were instrumented to monitor transfer length, camber, and prestress losses. In addition, companion cylinders were cast to measure the compressive strength and modulus of elasticity, and to monitor the creep and shrinkage over time. The viability of using several test methods to evaluate SCC fresh properties was also investigated. The test results indicated that the overall performance of the SCC girders was comparable to that of the conventional concrete girders. The measured, predicted, and calculated prestress losses were generally in good agreement. The study indicated that creep and shrinkage material models developed based on companion cylinder creep and shrinkage data can be used to reasonably predict measured prestress losses of both conventional and SCC prestressed bridge girders.
Author: Bulent Erkmen
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 347
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Book Description
Researchers conducted an experimental program to investigate the viability of producing self-consolidating concrete (SCC) using locally available aggregate, and the viability of its use in the production of precast prestressed concrete bridge girders for the State of Minnesota. Six precast prestressed bridge girders were cast using four SCC and two conventional concrete mixes. Variations in the mixes included cementitious materials (ASTM Type I and III cement and Class C fly ash), natural gravel and crushed stone as coarse aggregate, and several admixtures. The girders were instrumented to monitor transfer length, camber, and prestress losses. In addition, companion cylinders were cast to measure the compressive strength and modulus of elasticity, and to monitor the creep and shrinkage over time. The viability of using several test methods to evaluate SCC fresh properties was also investigated. The test results indicated that the overall performance of the SCC girders was comparable to that of the conventional concrete girders. The measured, predicted, and calculated prestress losses were generally in good agreement. The study indicated that creep and shrinkage material models developed based on companion cylinder creep and shrinkage data can be used to reasonably predict measured prestress losses of both conventional and SCC prestressed bridge girders.
Author:
Publisher:
ISBN:
Category : Girders
Languages : en
Pages : 188
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Book Description
Self-Consolidating Concrete (SCC), also known as self-compacting concrete, is a highly flowable concrete that is capable of filling formwork without using conventional vibration techniques while maintaining its cohesiveness. Currently SCC is used in many commercial applications and is gaining acceptance from many state DOTs for use in precast prestressed bridge girders. SCC is advantageous for many reasons including: (i) the number of workers required and the noise produced by mechanical vibration is reduced significantly; (ii) the safety hazards of workers on top of the girders is eliminated; (iii) the surface finish of the concrete can be more smooth than that of conventional concrete; (iv) formwork damage from mechanical vibration is reduced, increasing the life of the forms; (v) reinforcing bar configurations are not damaged; (vi) improved bond of concrete to prestressed strands could reduce strand end slip and the top bar effect; and (vii) SCC is able to fill complicated shapes and congested reinforcement areas better than vibrated concrete. This research report addresses the design and resulting properties of normal weight mix designs that were developed at the University of South Carolina and the testing of full scale lightweight concrete AASHTO Type III girders. Both aspects address material testing for properties in the fresh and hardened states. Fresh properties include slump spread, filling ability, passing ability, and air content. Hardened properties include compressive strength, modulus of elasticity, creep, shrinkage, chloride permeability, and freeze thaw durability. Testing of the girders includes transfer length, end slip, midspan deflections, midspan strains, and internal curing temperatures. Summaries and conclusions are provided along with recommended guidelines for implementation.
Author: Kamal Khayat
Publisher: Transportation Research Board
ISBN: 0309117666
Category : Bridges
Languages : en
Pages : 99
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Book Description
At head of title: National Cooperative Highway Research Program.
Author: Paul Zia
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 98
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Book Description
Author: Rafat Siddique
Publisher: Woodhead Publishing
ISBN: 012817370X
Category : Technology & Engineering
Languages : en
Pages : 410
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Book Description
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
Author: Eric P. Koehler
Publisher:
ISBN:
Category : Precast concrete construction
Languages : en
Pages : 380
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Book Description
Author: Åke Skarendahl
Publisher: RILEM Publications
ISBN: 9782912143099
Category : Concrete
Languages : en
Pages : 822
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Book Description
Author: Mahmoodul Haq
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 464
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Book Description
Author: Fikret Necati Catbas
Publisher: Frontiers Media SA
ISBN: 2889662128
Category : Technology & Engineering
Languages : en
Pages : 212
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Book Description
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 48
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Book Description
