Analysis of Major Influence Factors and Multi-Factor Calculation Model of Abrasion Resistance of Manufactured Sand Concrete

Abstract

Abstract: The influences of sand type, sand rate, stone powder content and compressive strength on the abrasion resistance of manufactured sand concrete were studied and a multi-factor calculation model of abrasion loss was established. The results show that the abrasion resistance of C30 and C40 concrete prepared from limestone manufactured sand and diabase manufactured sand increase by more than 20% compared to that of river sand because manufactured sand has stone powder, higher roughness and soundness. Better abrasion resistance of concrete obtains by selecting lower sand rate in the range of 0.40 to 0.44. The concrete is prepared by using the manufactured sand with 5% to 11% (mass fraction) stone powder content, and the abrasion resistance of concrete shows the best when the stone powder content is 9%, because the compactness of concrete achieves the best at this time through microscopic analysis. The grey system theory is utilized to determine the influence degree of the factors affecting the abrasion resistance, and the influence degree is ranked as follows: sand rate R₃> crushing value R₂> roughness R₁> compressive strength R₅> stone powder content R₄>0.6. The comparison and verification indicate that the proposed multi-factor calculation model of the abrasion loss of concrete has higher prediction accuracy and more excellent applicability.

Key words: manufactured sand, concrete, abrasion resistance, grey system, multi-factor model

CLC Number:

TU528.07

XIE Jicheng, ZHANG Yun, DU Yueming, CHEN Zheng, LUO Tingyi, TANG Yasen. Analysis of Major Influence Factors and Multi-Factor Calculation Model of Abrasion Resistance of Manufactured Sand Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2020, 39(12): 3812-3822.

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