Influence of the stone powder content of manufactured sand from different lithology on concrete properties in Guangdong area
For the local standard of GD JTG/T B01-2017"Guangdong Provincial Highway Engineering Manufactured Sand Cement Concrete Application Technical Specification",the limit value of stone powder of manufactured sand in concrete is≤10％,the test on the stone powder content of granite and limestone manufactured sand of two kinds of lithological properties on the workability,strength and other properties of C30,C50 concrete respectively.For C50 concrete,the stone powder content of the two kinds of lithological manufactured sand should be controlled within 10％in strict accordance with the standard.For C 30 concrete,the stone powder content of manufactured sand can be relaxed to 13％,and the stone powder content of manufactured sand can be relaxed to 16％.
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