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为了在北方寒区推广和应用水泥固化土建造保暖性房屋和设施农业,采用内蒙古黄河灌区周边典型的粉质土,利用普通硅酸盐水泥固化土体,配制水泥固化土,采用静力机械压实法和人工分层击实法分别制作了Φ50 mm×H50 mm和Φ39.1 mm×H80 mm两种不同规格的试件,并进行了无侧限抗压强度室内试验,研究了不同水泥掺入比、不同养护龄期、不同规格及成型方法对水泥固化土无侧限抗压强度的影响,得出了不同试验条件下水泥固化土的强度变化规律.试验结果表明:强度均随水泥掺入比及龄期的增大而增大,三者之间较好地满足空间平面模型,偏回归分析表明,水泥掺入比较龄期对强度的影响贡献更大,两种规格试件的强度之间较好地满足对数关系;不同规格及成型方法的试件对水泥固化土强度的影响规律不同,Φ39.1 mm×H80 mm试件存在一个临界水泥掺入比与临界养护龄期,当超过这个值时,其强度增长率减小.
In order to popularize and apply cement-cured soil in northern cold region to build warm house and facilities agriculture, the typical silty soil around Yellow River Irrigation District in Inner Mongolia was used to solidify the soil with ordinary portland cement to prepare cement-cured soil. Static mechanical pressure Two kinds of specimens with different sizes of Φ50 mm × H50 mm and Φ39.1 mm × H80 mm were made respectively by real method and artificial stratified compaction method, and the unconfined compressive strength indoor tests were conducted. The effects of different cement admixtures Different curing ages, different specifications and forming methods on the unconfined compressive strength of cement-cured soils, the change rules of the strength of cement-cured soils under different test conditions were obtained.The test results show that the strength of cement- And the age ratio increased, the space plane model was well satisfied among the three, partial regression analysis showed that cement incorporation in the age of more contribution to the strength, the strength of the two specifications of the specimen The relationship between logarithm and logarithm is well satisfied. The influence of the different specifications and forming methods on the strength of cement-cured soil is different. There is a critical cement incorporation ratio and critical curing age for Φ39.1 mm × H80 mm, When super When this value, the strength is reduced rate.