本文選題：粘土水泥漿材 + 防滲注漿��； 參考：《長沙理工大學(xué)》2015年碩士論文

【摘要】：粘土水泥漿材屬于無機(jī)類灌漿材料,具有良好的穩(wěn)定性、抗沖性、環(huán)境友好且大量節(jié)約水泥用量,是理想的防滲注漿材料,被廣泛的應(yīng)用到各領(lǐng)域的防滲注漿工程。經(jīng)工程驗(yàn)證,其防滲堵漏的效果能滿足施工的要求,然而結(jié)石體的抗侵蝕性能決定了其在軟水及其他侵蝕溶液長期作用下的使用效果及耐久性,地下工程施工位置隱蔽且多屬于永久性工程,使用年限長,漿材抗侵蝕性能的研究具有重要意義。本文分析了粘土水泥漿材的劣化機(jī)理并結(jié)合粘土水泥漿材的抗軟水侵蝕試驗(yàn)和抗硫酸鹽侵蝕試驗(yàn),以宏觀(CaO的累積溶出率、質(zhì)量損失率、強(qiáng)度)和微觀的(孔隙率、電鏡掃描)指標(biāo)研究結(jié)石的抗侵蝕性能以及劣化規(guī)律。主要內(nèi)容和結(jié)論如下:(1)軟水侵蝕條件下粘土水泥漿的劣化規(guī)律研究。以CaO的累積溶出率作為評價指標(biāo),研究了常壓固結(jié)條件下水灰比、粘土摻量、速凝劑摻量對漿材結(jié)石抗軟水侵蝕性能的影響,試驗(yàn)表明,對粘土水泥漿材抗水溶蝕性能影響最大的是粘土摻量,為獲得良好的抗軟水侵蝕性能,粘土摻量不宜超過50%,速凝劑摻量不超過1%;通過自制的壓濾裝置模擬壓濾效應(yīng)下漿材的固結(jié)過程制作試件,研究壓濾效應(yīng)對結(jié)石抗溶蝕性能的影響,試驗(yàn)表明壓濾效應(yīng)能顯著影響試件的固結(jié)和抗侵蝕性能,壓濾條件下粘土水泥漿材的抗溶蝕性能提高幅度比純水泥漿材的幅度大。(2)硫酸鹽侵蝕條件下粘土水泥漿的劣化規(guī)律研究。采用強(qiáng)度和質(zhì)量損失作為評價指標(biāo),將粘土摻量為0%、30%、50%的試件分別浸泡在清水和硫酸鈉溶液中,測試齡期設(shè)置為30d、60d、90d、120d、150d。結(jié)果表明,侵蝕介質(zhì)、侵蝕時間均影響粘土水泥結(jié)石的抗溶蝕性能及試件的劣化規(guī)律,粘土摻量為30%時漿材的抗硫酸鹽侵蝕性能最優(yōu)。(3)基于電鏡掃描和吸水動力學(xué)法研究粘土水泥漿結(jié)石的微觀特性。將成型的粘土水泥試件分別置于清水和標(biāo)準(zhǔn)養(yǎng)護(hù)箱中養(yǎng)護(hù)至規(guī)定齡期,用吸水動力學(xué)法測量結(jié)石的孔隙均勻系數(shù)和平均孔徑,并用電鏡掃描其微觀形貌,輔助評價粘土水泥結(jié)石的抗侵蝕性能。結(jié)果表明,材料配比、養(yǎng)護(hù)齡期、養(yǎng)護(hù)條件均會對粘土水泥結(jié)石的孔隙特性產(chǎn)生影響,孔隙特性的觀察結(jié)果與侵蝕試驗(yàn)的結(jié)論基本一致。
[Abstract]:Clay cement paste is a kind of inorganic grouting material with good stability, good impact resistance, friendly environment and a large amount of saving cement consumption. It is an ideal anti-seepage grouting material, and has been widely used in various fields of anti-seepage grouting engineering.It has been proved by engineering that the effect of seepage prevention and leakage plugging can meet the requirements of construction. However, the corrosion resistance of stone body determines its use effect and durability under the long-term action of soft water and other erosive solutions.It is of great significance to study the underground construction location which is hidden and belongs to the permanent project, the long service life and the anti-erosion performance of the slurry.In this paper, the deterioration mechanism of clay cement paste is analyzed, and combined with the soft water erosion test and sulfate resistance test of clay cement paste, the cumulative dissolution rate, mass loss rate, strength of macroscopical Cao and microcosmic (porosity) are analyzed.Electron microscope scanning (SEM) index was used to study the corrosion resistance and deterioration of stones.The main contents and conclusions are as follows: (1) study on the deterioration of clay cement slurry under soft water erosion.Taking the cumulative dissolution rate of CaO as the evaluation index, the effects of soil-cement ratio, clay content and accelerant content on the soft water corrosion resistance of slurry stones under normal pressure consolidation conditions were studied.The content of clay has the greatest influence on the water corrosion resistance of clay cement paste.The amount of clay should not exceed 50 and the quantity of accelerator should not exceed 1. The effect of pressure filtration on the corrosion resistance of stone was studied by simulating the consolidation process of slurry under the pressure filter effect by using a self-made pressure filter device.The results show that the pressure filtration effect can significantly affect the consolidation and corrosion resistance of the specimens.The corrosion resistance of clay cement paste under pressure filtration is larger than that of pure cement paste.The strength and mass loss were used as the evaluation indexes, and the samples with the clay content of 30% and 50% were immersed in water and sodium sulfate solution respectively, and the test age was set to be 30 days or 60 days or 90 days or 120 days or 150 days.The results show that the corrosion resistance of clay cement stones and the deterioration of specimens are affected by the erosion medium and time.Optimum Kraft erosion Resistance of slurry with 30% Clay content) the microscopic characteristics of clay cement paste stones were studied based on scanning electron microscopy and water absorption kinetics.The formed clay cement specimens were placed in clear water and standard curing box for curing to a specified age respectively. The porosity uniformity coefficient and average pore diameter of stone were measured by hydrodynamic method, and the microscopic morphology of stone was scanned by electron microscope.To evaluate the corrosion resistance of clay cement stone.The results show that the porosity characteristics of clay cement stones are affected by the ratio of materials, curing age and curing conditions, and the observation results of pore characteristics are basically consistent with the results of erosion test.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU578

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