Influence of m(S)/m(C) and sand gradation on compressive strength and fluidity of CA mortar
Influence of m(S)/m(C) and sand gradation on compressive strength and fluidity of CA mortar
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发表时间：
2008
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通讯作者：
Y. Peiyu
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作者：
Y. Peiyu
通过改变砂灰比和两种不同粒径砂的掺量，研究了m（S）/m（C）和砂级配对CA砂浆抗压强度和流动度的影响，结果表明：低强度CA砂浆和高强度CA砂浆的流动度均随m（S）/m（C）的增大而减小，高强CA砂浆的抗压强度随着m（S）/m（C）的增大而降低，而低强度CA砂浆的变化趋势则相反。采用粒径为0.42-0.21 mm和0.85- 0.21 mm的两种砂的复合物在CA砂浆中掺入0.30mm的CA砂浆，可以提高砂浆的抗压强度，改善流动性，两者的最佳配比为6∶4。
Effect of m(S)/m(C) and sand gradation on compressive strength and fluidity of CA mortar was studied by changing the sand cement ratio and the proportion of two kinds of sand with different particle sizes.The results show that the fluidity of both low strength CA mortar and high strength CA mortar decreases with the increase of m(S)/m(C),but the fluidity's changing extent of low strength CA mortar is not significant.The compressive strength of high strength CA mortar decreases with the increase of m(S)/m(C),while the changing trend of low strength CA mortar is opposite.Using complex of two kinds of sand with particle size of 0.42-0.21 mm and 0.85-0.30 mm in CA mortar can elevate the compressive strength and improve the fluidity.The most suitable ratio between them is 6∶4.