Effect of Limestone Powder and Gypsum on the Compressive Strength Mixture Design of Blast Furnace Slag Blended Cement Mortar
Effect of Limestone Powder and Gypsum on the Compressive Strength Mixture Design of Blast Furnace Slag Blended Cement Mortar
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DOI：
10.3151/jact.15.67
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发表时间：
2017-02
影响因子：
2
通讯作者：
Junho Kim;S. Na;Wenyan Zhang;T. Sagawa;Y. Hama
中科院分区：
文献类型：
--
作者：
Junho Kim;S. Na;Wenyan Zhang;T. Sagawa;Y. Hama
本文研究了高炉矿渣（BFS）掺加各种矿物外加剂(即BFS、石灰石粉（LSP）和石膏（CS）的混合砂浆的抗压强度发展。BFS替换率分别为15%、20%和25% wt.%；LSP替换率分别为2,3,4,5 wt.%；采用2 wt.%的CS替代率来提高BFS砂浆混合料的强度。采用XRD/Rietveld方法对水泥、BFS和矿物外加剂的水化反应和产物进行了定量检测，以研究产生的水化产物与强度之间的关系。试验研究表明，BFS为15 wt.%， LSP为4 wt.%， CS为2 wt.%的砂浆混合料，其抗压强度与普通硅酸盐水泥砂浆混合料相近。此外，随着BFS替代率的增加，强度降低。当BFS置换比大于20wt .%时，LSP影响BFS水泥的强度提高，CS影响BFS水泥的初始强度提高。
This paper investigates the compressive strength development of blast furnace slag (BFS) blended mortar mixtures incorporating various mineral admixtures, namely BFS, limestone powder (LSP), and gypsum (CS). BFS replacement ratios of 15, 20, and 25 wt.%; LSP replacement ratios of 2, 3, 4, and 5 wt.%; and a CS replacement ratio of 2 wt.% are employed to improve the strength of BFS blended mortar mixtures. The hydration reaction and products resulting from the use of cement, BFS, and mineral admixtures are quantitatively examined with respect to the XRD/Rietveld method in order to investigate the relationship between the produced hydrates and the strength. Experimental investigation reveals that the mortar mixture with BFS 15 wt.%, LSP 4 wt.%, and CS 2 wt.% exhibits similar compressive strength to an ordinary Portland cement mortar mixture. In addition, the strength is found to be decreased as the BFS replacement ratio increases. At a BFS replacement ratio above 20 wt.%, LSP affects the strength improvement of BFS cement and CS affects the initial strength improvement of BFS cement.