High Performance and Low Cost Compound Admixture of Expanded Perlite Powder/Redispersible Polymer Powder for Dry-Mixed Mortar

Abstract:

Since modern architectural technology has set a new standard for toughness of mortar, expensive polymer admixture has been used to modify dry-mixed mortar currently. But high cost critically restricted popularization of dry-mixed mortar. A new expanded Perlite powder- redispersible Polymer powder Compound dry-mixed mortar Admixture (PPCA) was researched in this paper. The research has indicated that PPCA showed synergistically optimized effect. There was the best modification effect when expanded perlite powder/redispersible polymer powder rate was 2 and admixture/cement rate was 0.15. The Ratio of Compressive strength to Flexural strength (RCF) declined to less than 3 when compressive strength of mortar staying above 10MPa. Moreover, cost of this compound admixture only was 1/3 of redispersible polymer powder admixture of the same performance. Meanwhile, this PPCA can improve water retention and increase softening coefficient of mortar to above 1.

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 513-518
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.513
• Online since: May 2011
• Authors: Hao Chi Tu, Xiao Shan Wang, Lu Bao Li, Hua Ruan, Jin Xiu Gao, Zi Sheng Wang, Zhi Yu Wang
• Keywords: Admixture, Dry-Mixed Cement Mortar, Expanded Perlite Powder, Ratio of Compressive Strength to Flexural Strength, Softening Coefficient, Water Retention

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