Analysis and Optimization of the Influence of Mineral Admixtures on the Performance of Seawater Sea Sand Cement Mortar
[Purposes]This paper aims to study the effect of mineral admixtures on the compressive prop-erties and free chloride ion curing properties of seawater sea sand cement mortar.[Methods]Through the orthogonal experiment of 4 levels and 3 factors,the effects of water-binder ratio,relative content of fly ash and relative content of mineral powder on the cube compressive strength and free chloride ion curing rate of seawater sea sand mortar were studied.The significance of the three factors on the cube compres-sive strength and free chloride ion curing rate was studied by variance analysis,and the influence law of the three factors was obtained by range analysis.[Findings]Compared with the reference mortar,the cube compressive strength of FA-GGBS/seawater sea sand mortar increased by 14.4%.Through the ob-jective weighting method,the best mix ratio scheme is obtained,and it is found that this scheme is the SSM5 experimental group.[Conclusions]Reasonable incorporation of mineral admixtures can optimize the performance of seawater sea sand cement mortar.
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