Title: Comparison of the roles of densified silica fume in paste and concrete
Abstract:This study investigates the differences of the roles of densified silica fume in paste and concrete. Four silica fume adding amount were set: 0%,6%,12% and 18%. The influences of densified silica fume...This study investigates the differences of the roles of densified silica fume in paste and concrete. Four silica fume adding amount were set: 0%,6%,12% and 18%. The influences of densified silica fume on the compressive strength of concrete and paste,and the pore structure and micro-morphology of paste were measured. The results show that there are many densified silica fume clusters in the hardened paste and there are even large cracks in some clusters,which increases the total porosity and reduces thecompressive strength of hardened paste. The attrition of aggregates during mixing makes densified silica fume better dispersed,and the pozzolanic reaction of silica fume improves the interfacial transition zone,which lead to the increase of the compressive strength of concrete.Read More
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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