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Cement and Concrete Research

Cement and Concrete Research

IF: 10.9
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Effect of calcium formate as an accelerator on the physicochemical and mechanical properties of pozzolanic cement pastes

Published:1 June 2004 DOI: 10.1016/j.cemconres.2003.11.015
Mohamed Heikal

Abstract

The aim of the present work is to study the effect of calcium formate (CF) as an accelerator on the properties of pozzolanic cement pastes. Three types of cements were used in this investigation. These cements were OPC and pozzolanic cements containing 80 mass% OPC and 20 mass% silica fume (SF) or 20 mass% ground clay bricks (GCB). The dosages of CF were 0.00, 0.25, 0.50, and 0.75 mass% of cement. The compressive strength, total porosity, and hydration kinetics such as free lime and combined water contents were investigated. The results obtained in this study showed that the addition of CF shortens the initial and final setting times and increases the compressive strength and combined water content as well as gel/space ratio at all ages of hydration. On the other hand, it decreases the total porosity. CF activates the liberation of Ca(OH)2 of OPC pastes. The free lime content of pozzolanic cement in the presence of CF increases up to 7 days, then decreases at the later ages of hydration.

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Related products
Procduct Name CAS Molecular Formula Supplier Price
Calcium hydroxide 1305-62-0 CaH2O2 717 suppliers $12.50-$3880.00
Calcium formate 544-17-2 C2H2CaO4 576 suppliers $10.00-$432.65
SINEFUNGIN 58944-73-3 C15H23N7O5 114 suppliers $43.00-$2350.00
CHINA CLAY FINE FOR TYRES 6 suppliers Inquiry
SILICA FUME 3 suppliers Inquiry
CF 1 suppliers Inquiry
Calcium Formate 1312710-55-6 C2H2CaO4 1 suppliers Inquiry
GCB 1 suppliers Inquiry

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