INFLUENCE OF SUPERPLASTICIZERS IN HEAVY DOSAGE ON HYDRATION OF CEMENT AND STRENGTH OF MORTAR

Abstract

Because of low W/C of high strength concrete, heavy dosage of superplasticizer is needed for high workability of concrete. The concentration of superplasticizer is so high that it may effect the hydration and strength of the cement. In this paper three types of superplasticizer in a large range of dosage were used, and the effects of superplasticizer on the hydration and strength of cement were investigated. According to the test's results, it is concluded that the adsorption of superplasticizer on cement and effect of superplasticizer on concentration of Ca²⁺ in solution of paste influence the hydration of cement and strength of the mortar.