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Study on Concrete Workability Based on Comparison between the Minimum Paste Demand and the Closest Packing Density

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  • Gaolong Zhang
  • Zhaoyu Yan
  • Fuqiang He
  • Ruipan Wang
  • Changping Chen

Abstract

The mixture design method (MDM) has been used to design the concrete workability with the three-graded stone. The results indicated that the proportion of the stone corresponding to the minimum paste demand ( P min ) can meet that corresponding to the approximate closest packing density ( ACPD max ). When the workability reaches its maximum value, the paste thickness ( T paste ) and mortar thickness ( T mortar ) do not reach their respective extreme values. Therefore, the combined effect of the T paste and T mortar needs to be considered when evaluating concrete workability. Compared with concrete designed by the maximum packing density, the concrete designed by the P min + ACPD max has a lower cost; however, stone surface area ( S stone ) and the average particle size of the stone ( D A-stone ) are increased by 8.6% and reduced by 5.7%, respectively. Therefore, the contradictory weakening effect of an increase in the S stone and a decrease in the D A-stone on the interface transition zone in both cases requires further investigation.

Suggested Citation

  • Gaolong Zhang & Zhaoyu Yan & Fuqiang He & Ruipan Wang & Changping Chen, 2020. "Study on Concrete Workability Based on Comparison between the Minimum Paste Demand and the Closest Packing Density," Mathematical Problems in Engineering, Hindawi, vol. 2020, pages 1-14, April.
    • Handle: RePEc:hin:jnlmpe:8934684
    DOI: 10.1155/2020/8934684
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