Powder Water Demand Index and Its Application of Manufactured Sand

doi:10.16552/j.cnki.issn1001-1625.2025.0529

Abstract

Abstract: In order to evaluate the water demand of powder in manufactured sand (MS) quantitatively, a powder water demand index (WDI) as well as its measurement and calculation method was proposed. The influence factors of the WDI of manufactured sand powder were explored, and the relationship between WDI and the workability and mechanical properties of concrete was investigated. The results indicate that the workability and mechanical properties of concrete decrease with the increase of WDI. The correlation coefficient between WDI and slump flow is 0.86, and the correlation coefficient between WDI and compressive strength is 0.88, indicating a good correlation. The manufactured sand mixed with different clay minerals has higher correlation between WDI and concrete workability, while the correlation with strength is slightly lower, therefore, the significant correlation between WDI of MS and MS concrete performance indicate WDI can be used as a classification indicator. Finally, the limitations and improvement technical routs of WDI formula are proposed.

Key words: manufactured sand, powder, water demand index, concrete performance, correlation coefficient

CLC Number:

TU528

WU Wenzhen, SUN Jiangtao, LI Zhitang, SHANG Yixin, ZHANG Wentao, XU Wei, SHEN Weiguo. Powder Water Demand Index and Its Application of Manufactured Sand[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(12): 4368-4374.

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