本文選題：浸泡條件 + 酸污染紅土��； 參考：《昆明理工大學(xué)》2014年碩士論文

【摘要】：本文結(jié)合云南基礎(chǔ)設(shè)施建設(shè)中廣泛使用的紅土及酸污染紅土的存在問(wèn)題,提出了“酸污染紅土的浸泡特性研究”這一課題。圍繞這一課題,主要開(kāi)展了浸泡條件下,酸液泡入紅士及酸液泡出紅土兩種不同方式的酸污染形式,研究了酸污染紅土的強(qiáng)度變形特性、微結(jié)構(gòu)變化特性、物質(zhì)組成變化特性及宏微觀響應(yīng)關(guān)系四個(gè)方面的研究工作,為揭示酸污染紅土問(wèn)題奠定了基礎(chǔ)。 酸污染紅土的強(qiáng)度變形試驗(yàn)結(jié)果表明：酸液泡入紅土及酸液泡出紅土,隨著酸液濃度的增大、浸泡時(shí)間的延長(zhǎng)及環(huán)境溫度的增大,紅土的抗剪強(qiáng)度最終逐漸減小,壓縮性逐漸增大。 微結(jié)構(gòu)試驗(yàn)結(jié)果表明：酸液泡入紅土及酸液泡出紅土,隨著酸液濃度的增大、浸泡時(shí)間的延長(zhǎng)及環(huán)境溫度的增大,紅土的微結(jié)構(gòu)特征呈現(xiàn)不同的趨勢(shì),土顆粒逐漸變小,孔隙逐漸增大，土顆粒形狀越來(lái)越不規(guī)則,土顆粒表面越粗糙。 酸污染紅土的物質(zhì)組成特性試驗(yàn)結(jié)果表明：酸液泡入紅土及酸液泡出紅土,紅土中的氧化鐵和氧化鋁含量逐漸減小,浸泡溶液中的鐵離子和鋁離子濃度逐漸增大。 浸泡條件下酸污染紅土的強(qiáng)度特性可以從吸水作用、侵蝕作用、凝聚作用及溶解作用來(lái)解釋,這四個(gè)作用來(lái)共同影響了酸污染紅土的浸泡特性。
[Abstract]:Based on the existing problems of red soil and acid-contaminated laterite which are widely used in infrastructure construction in Yunnan Province, this paper puts forward the subject of "study on soaking characteristics of acid-polluted laterite". Focusing on this subject, two different forms of acid pollution were carried out under the condition of soaking, the acid solution was soaked in the red soil and the acid solution bubble out of the red soil, and the strength and deformation characteristics and microstructure change characteristics of the acid contaminated red soil were studied. The research work on material composition change characteristics and macro and micro response relationship lays a foundation for revealing the problem of acid contaminated laterite. The results of strength deformation test of acid-contaminated laterite show that the shear strength of laterite decreases gradually with the increase of acid concentration, the prolongation of soaking time and the increase of ambient temperature. The compressibility increases gradually. The results of microstructure test showed that the microstructural characteristics of red soil showed different trends with the increase of acid concentration, soaking time and environment temperature, and the particle size of the red soil gradually decreased with the increase of acid concentration, soaking time and environment temperature. The porosity increases gradually, the shape of soil particle becomes more and more irregular, and the surface of soil particle becomes rougher. The results show that the content of iron oxide and alumina in red soil decreases gradually, and the concentration of iron ion and aluminum ion in soaking solution increases gradually. The strength characteristics of acid-contaminated laterite under soaking conditions can be explained by water absorption, erosion, agglomeration and dissolution, which affect the soaking characteristics of acid-contaminated laterite.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：X53;TU43

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