本文選題：水泥 + 粉煤灰　； 參考：《南京理工大學(xué)》2016年碩士論文

【摘要】：隨著工業(yè)化的快速發(fā)展,重金屬污染現(xiàn)象日益嚴(yán)重。其中銅污染引發(fā)的問題比較突出,不僅對人體健康和生態(tài)環(huán)境造成了危害,而且嚴(yán)重影響了工程建設(shè)。因此開展銅污染土的基本性質(zhì)研究,并與工程實(shí)際相結(jié)合,是我國社會(huì)發(fā)展和環(huán)境巖土工程學(xué)科發(fā)展的迫切需要。本文通過水泥、水泥摻粉煤灰、水泥摻石灰固化處理銅污染土試驗(yàn),研究了三種固化方法下銅污染土的強(qiáng)度變化規(guī)律,進(jìn)而對影響強(qiáng)度發(fā)展的各方面因素進(jìn)行探討。另外,還對比分析了三種不同固化方法下銅污染土的強(qiáng)度差異,并進(jìn)一步研究了摻入粉煤灰和石灰對水泥固化銅污染土強(qiáng)度的影響。取得以下主要成果：(1)當(dāng)銅離子摻量低于0.3%時(shí),三種固化方法下土體無側(cè)限抗壓強(qiáng)度都隨著銅離子摻量的增加先提高后降低,但變化幅度不大；當(dāng)銅離子摻量達(dá)到0.5%時(shí),三種固化方法下土體無側(cè)限抗壓強(qiáng)度明顯下降。另外三種固化方法下土體無側(cè)限抗壓強(qiáng)度都隨著固化劑摻量和齡期的增加有不同幅度的提高。(2)當(dāng)固化劑總摻量相同時(shí),7、14天齡期下,銅離子摻量低于O.3%時(shí),水泥單獨(dú)固化處理銅污染土的效果比組配固化效果好；當(dāng)銅離子摻量達(dá)到0.5%時(shí),組配固化效果稍稍優(yōu)于水泥單獨(dú)固化效果。而28、56天齡期下,水泥單獨(dú)固化效果比組配固化效果好,此時(shí)與銅離子摻量無關(guān)。另外,各個(gè)齡期下兩種組配的固化效果差別不大。(3)當(dāng)水泥摻量相同或相近時(shí),7、14天齡期下,銅離子摻量低于O.3%時(shí),摻入粉煤灰、石灰對水泥固化效果起不利作用；當(dāng)銅離子摻量達(dá)到0.5%時(shí),摻入粉煤灰、石灰對水泥固化效果起有利作用。而28、56天齡期下,摻入粉煤灰、石灰對水泥固化效果起不利作用,此時(shí)與銅離子摻量無關(guān)。
[Abstract]:With the rapid development of industrialization, heavy metal pollution is becoming more and more serious. The problems caused by copper pollution are not only harmful to human health and ecological environment, but also to engineering construction. Therefore, it is an urgent need for the development of society and environmental geotechnical engineering to study the basic properties of copper contaminated soil and combine it with engineering practice. In this paper, through the experiment of treating copper contaminated soil with cement, fly ash and lime cement, the change rule of strength of copper contaminated soil under three curing methods is studied, and the factors influencing the development of strength are discussed. In addition, the strength differences of copper contaminated soil under three different curing methods were compared and analyzed, and the influence of fly ash and lime on the strength of cement solidified copper contaminated soil was further studied. The main results are as follows: (1) when the content of copper ion is lower than 0.3%, the unconfined compressive strength of soil increases first and then decreases with the increase of copper ion content, but the change is not large; when the copper ion content reaches 0.5%, the unconfined compressive strength of soil is increased first and then decreased with the increase of copper ion content. The unconfined compressive strength of soil decreased obviously under three curing methods. In the other three curing methods, the unconfined compressive strength of soil increased by different extent with the increase of curing agent content and age) when the total amount of curing agent was the same, the copper ion content was less than 0.3% at the age of 714 days. The effect of cement curing alone is better than that of mixed solidification, and when the amount of copper ion reaches 0.5%, the effect of combination curing is slightly better than that of cement alone. Under the age of 28 ~ 56 days, the curing effect of cement alone is better than that of combination curing, which has nothing to do with the amount of copper ion. In addition, the curing effect of the two combinations is not different at different ages. (3) when the cement content is the same or similar, when the copper ion content is less than 0.3%, the lime is harmful to the cement curing effect when the content of copper ion is lower than 0.3%. When the amount of copper ion reaches 0.5, fly ash and lime play a favorable role in cement solidification. At the age of 28 ~ 56 days, the addition of fly ash and lime has adverse effect on the solidification effect of cement, but it has nothing to do with the amount of copper ion.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：X53;TU472

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