A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Engineering properties of self-consolidating concrete
Selected engineering properties of self-consolidating concrete (SCC) mixtures are evaluated and compared with the properties of conventional flowable concrete mixtures. Engineering properties such as compressive and tensile strengths, modulus of elasticity, Poisson's ratio, drying shrinkage, creep, porosity, chloride diffusivity, and bond to reinforcement are determined for various SCC mixtures. This paper shows that the engineering properties of stable SCC mixtures are comparable to or better than the properties of conventional flowable concrete. An analysis of the shrinkage and creep data shows that, in prestressed concrete applications, the long-term prestress losses associated with the combined effects of the two properties would be expected to be similar for the SCC and conventional concrete. The early-age porosity of SCC seems to be lower than that of the conventional flowable concrete, indicating the potential for an enhanced long-term durability of SCC compared with the conventional concrete. The use of a viscosity-modifying admixture facilitates the production of stable SCC mixtures at normal levels of s/a, with the added benefit of lower shrinkage compared with SCC mixtures that are produced at higher than normal levels of s/a. Highly stable SCC mixtures can be produced to have a level of top-bar effect (i.e., bond strength for top-cast bars relative to bottom-cast bars) that is similar to the top-bar effect in a 4 to 6-in. slump concrete.
Engineering properties of self-consolidating concrete
Selected engineering properties of self-consolidating concrete (SCC) mixtures are evaluated and compared with the properties of conventional flowable concrete mixtures. Engineering properties such as compressive and tensile strengths, modulus of elasticity, Poisson's ratio, drying shrinkage, creep, porosity, chloride diffusivity, and bond to reinforcement are determined for various SCC mixtures. This paper shows that the engineering properties of stable SCC mixtures are comparable to or better than the properties of conventional flowable concrete. An analysis of the shrinkage and creep data shows that, in prestressed concrete applications, the long-term prestress losses associated with the combined effects of the two properties would be expected to be similar for the SCC and conventional concrete. The early-age porosity of SCC seems to be lower than that of the conventional flowable concrete, indicating the potential for an enhanced long-term durability of SCC compared with the conventional concrete. The use of a viscosity-modifying admixture facilitates the production of stable SCC mixtures at normal levels of s/a, with the added benefit of lower shrinkage compared with SCC mixtures that are produced at higher than normal levels of s/a. Highly stable SCC mixtures can be produced to have a level of top-bar effect (i.e., bond strength for top-cast bars relative to bottom-cast bars) that is similar to the top-bar effect in a 4 to 6-in. slump concrete.
Engineering properties of self-consolidating concrete
Attiogbe, E.K. (author) / See, H.T. (author) / Daczko, J.A. (author)
2002
6 Seiten, 12 Bilder, 5 Quellen
Conference paper
English
| TIBKAT | 2007
| British Library Conference Proceedings | 2005
Elastic properties of self consolidating concrete
| Online Contents | 2011
Elastic properties of self consolidating concrete
| Elsevier | 2011
Transport Properties of Self-Consolidating Concrete
| British Library Online Contents | 2009