【摘要】：為了得到堿渣-粉煤灰-硅酸鈉溶液體系新型注漿材料各組分的作用和固化機(jī)理,考慮不同固體質(zhì)量配比和養(yǎng)護(hù)條件,通過溫度變化、固化收縮、抗壓強(qiáng)度和傅里葉變換紅外光譜試驗(yàn)對比研究不同體系的差別。結(jié)果表明:堿渣中Ca(OH)_2和粉煤灰中的CaO遇到硅酸鈉溶液時(shí)發(fā)生放熱反應(yīng);漿液早期抗壓強(qiáng)度由堿渣中CaCl_2、Ca(OH)_2和CaSO_4與硅酸鈉溶液反應(yīng)生成水化硅酸鈣凝膠決定,由于粉煤灰受堿激發(fā)生成了硅鋁酸鹽聚合物凝膠使得注漿液7~50 d抗壓強(qiáng)度有大幅增長;FTIR試驗(yàn)證實(shí)了水化硅酸鈣凝膠(C-S-H)和硅鋁酸鹽凝膠(N-A-S-H)的存在;原材料組分保證了漿液收縮程度小、流動(dòng)性好、不易離析、結(jié)石率大等優(yōu)點(diǎn)。
[Abstract]:In order to obtain the effect and curing mechanism of the new grouting material in the system of alkali slag, fly ash and sodium silicate solution, considering the different mass ratio of solid and the curing condition, the solidification shrinkage can be obtained by changing the temperature. The compressive strength and Fourier transform infrared spectroscopy (FTIR) were compared to study the differences of different systems. The results show that the exothermic reaction occurs when Ca (OH) _ 2 in alkali slag and CaO in fly ash meet sodium silicate solution. The early compressive strength of the slurry is determined by the reaction of CaCl_2,Ca (OH) _ 2 and CaSO_4 with sodium silicate solution to form hydrated calcium silicate gel. Because fly ash is excited by alkali to form aluminosilicate polymer gel, the compressive strength of grouting fluid for 750 days is increased greatly. The existence of hydrated calcium silicate gel (C-S-H) and aluminate gel (N-A-S-H) was confirmed by FTIR test.
【作者單位】： 河北工業(yè)大學(xué);河北省土木工程技術(shù)研究中心;
【基金】：河北省科技計(jì)劃項(xiàng)目(15273802D)
【分類號】：TB32;TD325.3

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本文編號：2316862