本文選題：改性水玻璃 + 電場��； 參考：《材料導(dǎo)報(bào)》2017年22期

【摘要】：利用正交和單因素控制實(shí)驗(yàn)對(duì)電場改性水玻璃加固黃土進(jìn)行了研究,并通過化學(xué)組成、礦物成分和微觀結(jié)構(gòu)分析探討了電場改性水玻璃加固黃土的機(jī)理。結(jié)果表明:通電電壓越高,通電時(shí)間越長,改良土體的無側(cè)限抗壓強(qiáng)度越大;土體強(qiáng)度隨Na2O含量、模數(shù)的增長先減小后增大,存在下極值點(diǎn);X射線衍射圖中出現(xiàn)非晶質(zhì)物相峰群,隨著Na2O含量的增加,非晶質(zhì)先減少后增多,礦物的衍射強(qiáng)度先降低后升高;SEM圖像表明隨著電壓的不斷增大,生成的硅酸凝膠逐漸增多,包覆土體顆粒,填充顆粒之間的孔隙,使得骨架顆粒連接緊密,從而使得土體強(qiáng)度增大;BET表面積孔隙分析表明,隨著通電電壓的升高和通電時(shí)間的延長,黃土的小孔隙增多,孔隙體積和表面積增大,孔徑分布減小,平均孔徑變化不大。
[Abstract]:The strengthening mechanism of electric field modified water glass was studied by means of orthogonal and single factor control experiments, and the mechanism of strengthening loess with electric field modified water glass was discussed through chemical composition, mineral composition and microstructure analysis. The results show that the higher the electrification voltage and the longer the electrification time, the greater the unconfined compressive strength of the modified soil, and the higher the Na2O content, the greater the modulus increase. In the X-ray diffraction pattern of the existence of the lower extremum, the amorphous phase peak group appeared. With the increase of Na2O content, the amorphous substance decreased first and then increased, and the diffraction intensity of minerals decreased first and then increased. The results show that the diffraction intensity of minerals decreases first and then increases with the increase of voltage. The formation of silicic acid gel gradually increased, covering the soil particles, filling the pores between the particles, making the skeleton particles close, thus making the soil strength increase and BET surface area pore analysis shows that, With the increase of electric voltage and the prolongation of electrification time, the pore size and surface area of loess increase, pore volume and surface area increase, pore size distribution decreases, and the average pore size changes little.
【作者單位】： 后勤工程學(xué)院軍事土木工程系;巖土力學(xué)與地質(zhì)環(huán)境保護(hù)重慶市重點(diǎn)實(shí)驗(yàn)室;后勤工程學(xué)院化學(xué)與材料工程系;蘭州理工大學(xué)土木工程學(xué)院;
【基金】：國家科技支撐計(jì)劃項(xiàng)目(2013BAJ06B00)
【分類號(hào)】：TU444
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本文編號(hào)：1907059