Expansion-Shrinkage, Creep, and Elastic Modulus of Shrinkage-Compensating Gap-Graded Concrete

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Title: Expansion-Shrinkage, Creep, and Elastic Modulus of Shrinkage-Compensating Gap-Graded Concrete

Author(s): Shu-t’ien Li and V. Ramakrishnan

Publication: Special Publication

Volume: 64

Issue:

Appears on pages(s): 123-152

Keywords: aggregate gradation; compressive strength; creep properties; expansion; expansive cement, Type K; expansive cements, gap-graded aggregates; modulus of elasticity; shrinkage; shrinkage-compensating cements.

Date: 7/1/1980

Abstract:
This paper deals with the expansion-shrinkage characteristics, creep, and modulus of elasticity of gap-graded shrinkage-compensating concrete. Type K stir i nltage-compensat ing cement was used. Water-cement ratio was adopted as the main variable parameter. From the results of this investigation it is concluded that for constant aggregate-cement ratio wi th sanie size of aggregates, the expansion level is decreased by increasing the water-cement ratio, and the rate of expansion increases at higher water-cement ratios. Lateral restraint increases the longitudinal expansion as much as 25 percent. The percentage difference in the niaxinium unit longitudinal expansion between restrained and unkstrained specinlens decreases with increasing water-cement ratio. Modulus of elasticity test results are similar to those obtained for gap-graded Type I cement concrete.