Effect of Stone Powder Content on Properties of C45 Tuff Manufactured Sand Concrete

Abstract

Abstract: The effect of stone powder content on the workability, mechanical properties and chloride ion penetration resistance of C45 tuff manufactured sand concrete (MSC) were assessed by applying the slump test,Vkelly test, compressive strength, elastic modulus, splitting tensile strength and surface resistivity tests. In accordance with the fitting analysis of quadratic formula and the comparative study of MSC and natural sand concrete (NSC), the suggested stone powder content of C45 tuff MSC was established. The results indicate that the slump, Vkelly index compressive strength, elastic modulus, splitting tensile strength andchloride ion penetration resistance of C45 tuff MSC increase first and then start to decrease with the increase of stone powder content in a certain range. In engineering applications, if the specific required slump is greater than 100 mm and elastic modulus is higher than 44 GPa, the suggested stone powder content of C45 tuff MSC is between 2% (mass fraction, the same below) and 5%. Otherwise, the suggested stone powder content between 5% and 8% is accepted. Reasonable control of the stone powder content of manufactured sand can yield a better engineering performance of C45 tuff MSC compared with C45 NSC.

Key words: tuff manufactured sand concrete, stone powder content, workability, mechanical property, chloride ion penetration resistance

CLC Number:

TU528

WANG Xuhao, GAN Long, YU Haiyang, LI Cheng, GAO Xinmin, ZHANG Yagang, LI Lianwei, BIAN Qinghua. Effect of Stone Powder Content on Properties of C45 Tuff Manufactured Sand Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(3): 775-783.

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