Compressive Strength of Silica Fume Concrete at Higher Temperatures

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Title: Compressive Strength of Silica Fume Concrete at Higher Temperatures

Author(s): T. Kandra, F. Sakuramoto, and K. Suzuki

Publication: Special Publication

Volume: 132

Issue:

Appears on pages(s): 1089-1104

Keywords: admixtures; aggregates; compressive strength; temperature; heat of hydration; high-strength concretes; silica fume; curing; water-reducing agents; Materials Research

Date: 5/1/1992

Abstract:
Compressive strength of concrete with silica fume cured at high temperatures generated by heat of hydration during early age was studied. The curing temperatures simulated the site-curing conditions of structural members. Four types of aggregates and four types of admixtures were used, and a total of seven concrete samples were cured at four temperature conditions ranging from 20 to 75 C. Results indicated the following: 1) at higher curing temperatures, the 1-week strength was higher but the strength gain from 1 to 4 weeks tended to be low; 2) independent of curing temperature, the type of aggregate greatly influenced the strength, and the results were the same with all the admixtures; 3) high-temperature curing influenced concrete strength independently of the admixture and aggregate; 4) equivalent age at 20 C based on the Arrhenius equation gave a reasonable estimation of compressive strength gain.