Abstract
In this paper, the correlation between limestone powder content and MB value in manufactured sand is analyzed and the effect of limestone powder content and clay content of manufactured sand on the MB value is studied, the results show that with the increase of pure limestone powder content, the MB values remained almost unchanged, and were less than 1.0; when the limestone powder content increased from 5% to 15%, with the increase of clay content, the MB value increased gradually; when the limestone powder content was taken as 7%, 12% and 15%, the clay content was taken as1.8%, 2.7% and 2.3% respectively with the MB value kept at 1.0, which still could meet the requirement of the engineering construction standard JGJ52-2006 about clay content.
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