Influence of Silica Fume Content on the Basic Mechanical Properties of Low-Heat Portland Cement Concrete
With the wide application of low-heat Portland cement in hydraulic projects,higher requirements are put forward for the mechanical properties of low-heat Portland cement concrete.In this study,the underwater steel ball method was used to quantify the influence of silica fume content(0,3%and 5%)on the basic mechanical properties and other mechanical properties of low-heat Portland cement concrete.The results showed that the addition of silica fume could effectively improve the abrasion resistance of low-heat Portland cement concrete,which increased by 12.2%when the content was 3%,and increased by 14.6%when the content was 5%.Compared to concrete without adding silicon powder,when 3%silica fume was added,the compressive strength and split tensile strength of low-heat Portland concrete were respectively reduced by about 3.5%-6.0%,3.8%-11.1%;axial tensile properties(axial tensile strength and ultimate tensile value)increased by about 7.0%;when 5%silica fume was added,the compressive strength,splitting tensile strength and axial tensile properties could be respectively increased by about 3.6%-7.0%,2.8%-3.5%,6.9%-14.8%.Therefore,a relatively ideal overall performance could be obtained when the content of silica fume was 5%.
NETL
NSTL
万方数据
维普
