本文關(guān)鍵詞： 土壤固化劑 固化機(jī)理 固化土基層 強(qiáng)度影響因素 耐久性指標(biāo)　出處：《沈陽(yáng)建筑大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著社會(huì)的不斷發(fā)展,我國(guó)對(duì)道路建設(shè)的投入日益加大,砂、石等傳統(tǒng)筑路材料的開采已嚴(yán)重破壞環(huán)境,造成大量浪費(fèi),工程建設(shè)的快速增長(zhǎng)使整個(gè)社會(huì)付出了太多的代價(jià)。節(jié)約資源、保護(hù)環(huán)境已是世界各國(guó)共同關(guān)心的重大課題。土壤固化劑這一新型環(huán)保材料具有良好的經(jīng)濟(jì)性、工程性質(zhì)穩(wěn)定,必將給道路建設(shè)帶來(lái)一場(chǎng)革命。本文開篇闡明了研究固化土路面基層材料具有的經(jīng)濟(jì)效益和可持續(xù)發(fā)展意義,土壤固化劑技術(shù)的發(fā)展起源,目前國(guó)內(nèi)外的研究成果和研究現(xiàn)狀。國(guó)內(nèi)外科研人員對(duì)固化土路面基層的研究現(xiàn)狀和近年來(lái)國(guó)內(nèi)的部分試驗(yàn)路應(yīng)用情況。提出固化土基層的技術(shù)指標(biāo),從經(jīng)濟(jì)性和綜合性兩方面描述了固化土基層現(xiàn)階段發(fā)展面臨的困難。固化土的分類形式多種多樣,本文從高聚物類土壤固化劑、表面活性劑類土壤固化劑、生物酶類土壤固化劑和粉狀土壤固化劑4個(gè)方面深入分析了它們的固化機(jī)理,并將之與傳統(tǒng)土壤加固材料作對(duì)比。本文依托遼寧省內(nèi)的土質(zhì)分布情況,選取有代表性的3種土壤并搭配5種分別來(lái)自3個(gè)廠家的土壤固化劑,首先進(jìn)行原材料試驗(yàn),包括篩分、測(cè)定液塑限值等,給土樣定名。通過(guò)擊實(shí)試驗(yàn)研究固化土基層材料含水率干密度的影響因素,并得出3種土樣和3種混合土的最佳含水率和最大干密度。通過(guò)7d無(wú)側(cè)限抗壓強(qiáng)度試驗(yàn)作為配合比設(shè)計(jì)的依據(jù),研究不同固化劑與結(jié)合料對(duì)不同土質(zhì)的強(qiáng)度影響差異。選取配合比方案后,對(duì)不同齡期試件的無(wú)側(cè)限抗壓強(qiáng)度、劈裂強(qiáng)度、抗壓回彈模量進(jìn)行試驗(yàn)研究,探究固化劑與結(jié)合料的綜合作用是怎樣影響這些強(qiáng)度指標(biāo)的,并對(duì)制件過(guò)程中壓實(shí)度與延遲時(shí)間對(duì)材料強(qiáng)度的影響也進(jìn)行了分析。從固化土基層的耐久性方面,對(duì)水穩(wěn)定性、干濕循環(huán)、吸水性、滲透系數(shù)、凍融循環(huán)進(jìn)行試驗(yàn)分析,總結(jié)出固化劑對(duì)干濕循環(huán)性、抗?jié)B性、抗凍融循環(huán)性有較好的改良作用,而對(duì)水穩(wěn)定性和吸水性沒(méi)有明顯的作用效果。
[Abstract]:With the development of society, the investment in road construction in our country is increasing day by day. The exploitation of traditional road building materials, such as sand and stone, has seriously damaged the environment and caused a lot of waste. The rapid growth of engineering construction has made the whole society pay too much price. Saving resources and protecting the environment has become a major issue of common concern in the world. Soil curing agent, a new type of environmental protection material, has good economy and stable engineering properties. It will surely bring a revolution to the road construction. In the beginning of this paper, the economic benefit and sustainable development significance of the study of the solidified soil pavement base material and the origin of the development of the soil curing agent technology are expounded. The present research results and research status at home and abroad, the research status of solidified soil pavement base at home and abroad and the application of some domestic test roads in recent years, the technical indexes of solidified soil base are put forward. In this paper, the difficulties in the development of solidified soil base are described in terms of economy and comprehensiveness. The classification of solidified soil is varied. In this paper, polymer soil curing agent and surfactant soil curing agent are introduced. In this paper, four aspects of soil curing agents such as biological enzymes and powdery soil curing agents are analyzed in depth, and compared with traditional soil strengthening materials. The distribution of soil quality in Liaoning Province is relied on in this paper. Three kinds of soils were selected and five kinds of soil curing agents from three factories were used to test the raw materials, including screening, measuring the limit value of liquid and plastic, and so on. Name the soil sample. Through compaction test, study the influencing factors of moisture content and dry density of solidified soil base material, The optimum moisture content and maximum dry density of three soil samples and three mixed soils were obtained. The effects of different curing agents and binders on the strength of different soils were studied. This paper explores how the comprehensive action of curing agent and binder affects these strength indexes, and analyzes the influence of compaction degree and delay time on the strength of the material in the process of making parts. The dry and wet cycle, water absorption, permeability coefficient and freeze-thaw cycle were tested and analyzed. It was concluded that the curing agent had a better effect on dry-wet circulation, impermeability and anti-freeze-thaw cycle, but had no obvious effect on water stability and water absorption.
【學(xué)位授予單位】：沈陽(yáng)建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U414

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