本文選題：鋼纖維混凝土 + 硅灰　； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：本文作者將硅灰和聚合物乳液摻加到鋼纖維混凝土中,硅灰和聚合物乳液摻量均為3%、6%、9%、12%,鋼纖維摻量為0.6%、0.9%、1.2%,在基準(zhǔn)混凝土配合比相同的情況下,進(jìn)行了28d基本力學(xué)性能試驗(yàn)、抗凍試驗(yàn)、碳化試驗(yàn)、抗硫酸鹽侵蝕試驗(yàn)以及微觀結(jié)構(gòu)表征試驗(yàn)。首先測(cè)試了摻硅灰和聚合物乳液的鋼纖維混凝土工作性能,硅灰和聚合物乳液使鋼纖維混凝土工作性能良好。硅灰使鋼纖維混凝土坍落度降低,隨著硅灰摻量的增加,其棍度偏向中級(jí);聚合物乳液使鋼纖維混凝土塌落度增加,隨著聚合物乳液摻量的增加,其棍度偏向上級(jí);其次研究了鋼纖維硅灰混凝土和鋼纖維聚合物混凝土的基本力學(xué)性能。在復(fù)摻12%硅灰+1.2%鋼纖維時(shí),混凝土的抗壓強(qiáng)度、劈裂抗拉強(qiáng)度、抗折強(qiáng)度達(dá)到最大,復(fù)摻硅灰的鋼纖維混凝土效果要優(yōu)于復(fù)摻聚合物乳液的;研究了硅灰和聚合物乳液對(duì)鋼纖維混凝土的耐久性能影響,硅灰對(duì)鋼纖維混凝土抗凍性能提升效果較明顯,而復(fù)摻聚合物乳液鋼纖維混凝土抗凍性提升效果要優(yōu)于復(fù)摻硅灰的;碳化試驗(yàn)指出復(fù)摻12%聚合物乳液+0.9鋼纖維的混凝土碳化深度比0.9%鋼纖維混凝土的低28.3%,抗碳化效果優(yōu)于復(fù)摻12%硅灰的鋼纖維混凝土;抗硫酸鹽侵蝕試驗(yàn)結(jié)果得出硅灰比聚合物乳液使鋼纖維混凝土長(zhǎng)期抵抗硫酸鈉的腐蝕能力更明顯。復(fù)摻12%硅灰+1.2%鋼纖維的混凝土抗硫酸鈉侵蝕性能最明顯,相比普通混凝土提升了31.4%,而復(fù)摻相同比例的聚合物乳液和鋼纖維的混凝土抗硫酸鈉侵蝕性能僅提升20%。研究了硅灰和聚合物乳液對(duì)鋼纖維混凝土微觀結(jié)構(gòu)的影響。微觀表征試驗(yàn)結(jié)果顯示硅灰使鋼纖維混凝土內(nèi)部孔隙結(jié)構(gòu)細(xì)化,細(xì)化效果要明顯優(yōu)于聚合物乳液。
[Abstract]:The author adds silica fume and polymer emulsion to steel fiber concrete, the content of silica fume and polymer emulsion are both 3 / 6 / 99 / 1212, and the amount of steel fiber is 0.6 / 0.9 / 1.2. The basic mechanical properties of the concrete are tested for 28 days under the same mix ratio of the reference concrete.Freezing resistance test, carbonation test, sulfate corrosion resistance test and microstructure characterization test.The performance of steel fiber reinforced concrete (SFRC) mixed with silica fume and polymer emulsion was first tested, and the working performance of SFRC was improved by silica fume and polymer emulsion.Silica fume decreases the slump of SFRC, and with the increase of the content of silica fume, the stick degree of SFRC increases with the increase of the content of silica fume, and the stick degree of SFRC increases with the increase of the content of polymer emulsion, and the stick degree of SFRC increases with the increase of the content of polymer emulsion.Secondly, the basic mechanical properties of steel fiber silica fume concrete and steel fiber polymer concrete are studied.When 12% silica fume is mixed with 1.2% steel fiber, the compressive strength, splitting tensile strength and flexural strength of concrete are maximum, and the effect of steel fiber reinforced concrete mixed with silica fume is better than that of polymer emulsion.The effects of silica fume and polymer emulsion on the durability of steel fiber reinforced concrete are studied. The effect of silica fume on the frost resistance of steel fiber reinforced concrete is obvious, but the effect of composite polymer emulsion steel fiber reinforced concrete is better than that of composite silica fume.The carbonization test shows that the carbonation depth of the concrete mixed with 12% polymer emulsion 0.9 steel fiber is lower than that of 0.9% steel fiber concrete, and the carbonation resistance is better than that of the steel fiber concrete with 12% silica fume.The results of sulfate-resistance test show that the corrosion resistance of SFRC is more obvious than that of polymer emulsion.The corrosion resistance of concrete mixed with 12% silica fume 1.2% steel fiber is the most obvious, which is 31.444% higher than that of ordinary concrete, but the corrosion resistance of concrete mixed with the same proportion of polymer emulsion and steel fiber is only 20%.The effect of silica fume and polymer emulsion on the microstructure of steel fiber reinforced concrete (SFRC) was studied.The results of microscopic characterization test show that silica fume refines the pore structure of steel fiber reinforced concrete, and the fining effect is obviously better than that of polymer emulsion.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU528

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