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1 2007

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Wpływ wypełniaczy wapiennych na ciepło twardnienia cementu

Janowska-Renkas E.

Roczniki Inżynierii Budowlanej

2007

z. 7

25--30

This paper presents the results of influence of limestone flour fillers size reduction degree in cement on cement hydration heat with or without a new generation superplasticizer based on acrylic polymers EP. It has been proven that limestone fillers present in cement accelerate hydration reaction of calcium silicates. Acceleration of hydration process of silicates depends on a filler’s size reduction degree, and the more fine fractions there are in the filler the bigger is the acceleration. The presence of the (EP) superplasticizer in cement grouts with a limestone filler retards a silica effect on a speed curve of heat emission and in this way it retards a hydration process of calcium silicates. The more developed surface of the filler used the bigger is the regardless, what as a consequence can cause a lower reactivity of tricalcium silicate in these grouts.