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中文摘要：
通过正交实验,分析了水胶比、粉煤灰掺量、砂率和沙漠砂替代率对不同龄期高强混凝土抗压强度影响.在正交试验基础上,保持水胶比、粉煤灰掺量和砂率不变,通过单因素实验,进一步研究不同沙漠砂替代率对高强混凝土抗压强度的影响规律.研究结果表明：用沙漠砂替代中砂配制高强混凝土是可行的;综合考虑正交试验和单因素试验中沙漠砂替代率对高强混凝土抗压强度的影响,沙漠砂高强混凝土中沙漠砂的最佳替代率20％.
英文摘要：
The orthogonal experiment is designed to analyze the influence of water-binder ratio,fly ash dosage,sand ratio and desert sand replacement ratio on the compressive strength of high strength concrete at different age.On the basis of the result from the orthogonal experiment,single factor experiment is further carried out to study the influence of desert sand replacement ratio on the compressive strength of desert sand high strength concrete.Experimental result shows that it is practical to use the desert sand from Muus desert to mix high strength concrete.Taking into account of the results from the orthogonal experiment and single factor experiment,the optimum desert sand replacement ratio of desert sand high strength concrete is 20％.
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