A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bond,Transfer Length, and Develepment Length of Prestressing Stand in Self-Consolidating Concrete
Self-consolidating concrete (SCC) is becoming increasingly popular in the precast/prestressed concrete industry in the United States. However, there have been concerns regarding the bond strength, transfer length, and development length of prestressing strands and mild steel reinforcement with SCC. Further, there are no design guidelines for using SCC. In this study, a literature survey on the bond strength of SCC was conducted. Moustafa pullout tests were performed to determine the bond strength of 0.6 in. (15.2 mm) pretensioning strands with sec. The transfer lengths of three pretensioned concrete bridge girders were measured using Demec points. Pullout tests were also performed on 41 specimens using No. 4, No. 6, and No. 8 mild steel reinforcing bars and 0.6 in. prestressing strands. All the tests were performed using specimens cast with both SCC and conventional concrete. Test data have shown that the bond strength of sec with deformed reinforcing bars is adequate. However, the use of viscosity-modifying admixtures in sec may adversely affect its early compressive strength and its bond strength with pretensioning strands.
Bond,Transfer Length, and Develepment Length of Prestressing Stand in Self-Consolidating Concrete
Self-consolidating concrete (SCC) is becoming increasingly popular in the precast/prestressed concrete industry in the United States. However, there have been concerns regarding the bond strength, transfer length, and development length of prestressing strands and mild steel reinforcement with SCC. Further, there are no design guidelines for using SCC. In this study, a literature survey on the bond strength of SCC was conducted. Moustafa pullout tests were performed to determine the bond strength of 0.6 in. (15.2 mm) pretensioning strands with sec. The transfer lengths of three pretensioned concrete bridge girders were measured using Demec points. Pullout tests were also performed on 41 specimens using No. 4, No. 6, and No. 8 mild steel reinforcing bars and 0.6 in. prestressing strands. All the tests were performed using specimens cast with both SCC and conventional concrete. Test data have shown that the bond strength of sec with deformed reinforcing bars is adequate. However, the use of viscosity-modifying admixtures in sec may adversely affect its early compressive strength and its bond strength with pretensioning strands.
Bond,Transfer Length, and Develepment Length of Prestressing Stand in Self-Consolidating Concrete
B.K Porterfield (author) / S.J Volz (author) / J.J Myers (author) / L Sneed (author)
2014
285 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Civil Engineering , Construction Management & Techniques , Construction Materials, Components, & Equipment , Materials Sciences , Engineering Materials , Pre-stressed concrete , Bridges decks , Composite materials , Corrosion mitigation , Fiber-reinforced polymers , Research program , Cements , Compressive strength , Self-consolidated concrete , Steels , Costs , Aggregates
Bond of prestressing strands in self-consolidating concrete
| British Library Online Contents | 2008
Bond performance of prestressing strand in self-consolidating concrete
| Elsevier | 2019
| British Library Conference Proceedings | 2005