Abstract
The optimal gypsum-lime content of high water material was determined by the compressive strength and hydration heat test. The compressive strength test shows the optimal gypsum-lime content in B material of high water material varies from 80–20% to 85–15%. The analysis of the hydration process of high water material with different components indicates that the peak hydration exothermic rate can reach the maximum, at optimal gypsum-lime content. The hydration products of high water material with the optimal gypsum-lime content were investigated by scanning electron microscopy (SEM). The SEM analysis manifests that the main hydration products of high water material under optimal gypsum-lime content are needle-like and prismatic ettringite, amorphous C-A-S-H gel.
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