ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 5

The Effects of Composition and Fineness of Cement in Accelerated Testing of Concrete

Al-Rawi, RS
Instructor, College of Engineering, University of Baghdad, Baghdad,

Abstract

The effects of C₃A content, fineness, gypsum content, C₃S:C₂S ratio, and alkali content of the cement on the correlation between 1-day accelerated and 28-day normal strength of concrete were investigated. The accelerated testing method used was that developed by the Institution of Civil Engineers (ICE) Accelerated Testing Committee [1]. Both C₃A and alkali content did not affect the correlation between accelerated and 28-day strength. Increased fineness caused the predicted 28-day strength to be less than actual. Increased gypsum content could cause an increase in accelerated strength and at the same time a decrease in 28-day strength. The ICE correlation was not applicable when cements of low C₃S:C₂S ratio were used.

Keywords:
accelerated tests, compressive strength, concretes, cements, fineness, gypsum, aluminates, silicates, alkalies

Paper ID: JTE10083J
DOI: 10.1520/JTE10083J
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