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用低掺量水泥加固3种不同的土进行室内试验研究,测试了不同Ca(OH)2掺量及不同龄期下3种水泥土的无侧限抗压强度。分析了随Ca(OH)2掺量的增加,不同龄期的3种水泥土无侧限抗压强度变化规律及原因。试验结果表明:水泥红粘土强度随Ca(OH)2掺量的增加提高最为明显,粉质粘土次之,砂土最弱。分析原因是由于土体的细度对水泥土强度影响较大。土体越细,土体中粘土矿物越多,Ca(OH)2掺量的增加促进了更多的离子交换作用和火山灰作用的发生,从而提高了水泥土强度。试验所用的3种土中红粘土最细,所以水泥红粘土强度随Ca(OH)2掺量的增加提高最为明显。
Three different kinds of soil were reinforced with low content of cement for laboratory test. The unconfined compressive strengths of three kinds of soil under different Ca (OH) 2 content and different ages were tested. With the increase of Ca (OH) 2 content, the variation regularity and reason of unconfined compressive strength of three kinds of soil cement at different ages were analyzed. The results show that the strength of cement-red clay increases most obviously with the increase of Ca (OH) 2 content, followed by silty clay, while sand is the weakest. Analysis is due to the fineness of soil strength of cement soil greater impact. The finer the soil, the more clay minerals in the soil, and the increase of the content of Ca (OH) 2 promotes more ion exchange and volcanic ash action, thus increasing the strength of cement soil. The three kinds of clay used in the experiment are the thinnest, so the strength of cement-red clay increases most obviously with the increase of Ca (OH) 2 content.