A Study on Effect of Strength Accelerating Compound on Properties of Concrete and Mortar

Abstract

The early-age properties of low slump concrete and mortar with the strength
accelerating compound were investigated. The strength accelerating
compound was used as an additive and replacement material with varied
content. The expansion of mortar samples containing the strength
accelerating compound stored in water and the autoclave expansion of paste
bar samples containing the strength accelerating compound were used to
determine durability properties. The long term durability property such as
sulfate resistance was also investigated. It was found that as consequence of
using the strength accelerating compound as an additive material the earlyage
compressive strength and slump of concrete were improved. The
expansion of mortar due to storage in water was in the limit of the standard
when incorporated with limestone powder. The autoclave expansion of paste
bar sample containing the strength accelerating compound was less than
0.8%. The sulfate resistance of concrete was improved when using strength
accelerating compound as replacement material.