本文選題：煅燒煤矸石粉　切入點(diǎn)：質(zhì)量損失率　出處：《混凝土》2017年08期 　論文類(lèi)型：期刊論文

【摘要】：采用硫酸鈉溶液長(zhǎng)期浸泡法,以質(zhì)量損失率、抗壓強(qiáng)度、抗壓強(qiáng)度變化率以及劈裂抗拉強(qiáng)度為評(píng)價(jià)指標(biāo),研究了硫酸鹽環(huán)境下煅燒煤矸石粉在混凝土中的作用。結(jié)果表明:煅燒煤矸石粉等質(zhì)量取代10%、20%、30%的水泥,浸泡至10個(gè)月,各試件的質(zhì)量損失率隨浸泡齡期增加均呈現(xiàn)減小的趨勢(shì),浸泡10~14個(gè)月,其質(zhì)量損失率隨摻量的增加而降低,且明顯低于標(biāo)準(zhǔn)組;浸泡14個(gè)月時(shí),不同取代率的煅燒煤矸石粉試件的劈裂抗拉強(qiáng)度和抗壓強(qiáng)度均大于標(biāo)準(zhǔn)組,其抗壓強(qiáng)度增加率分別為17.2%、22.4%、38.2%,而標(biāo)準(zhǔn)組混凝土試件的抗壓強(qiáng)度下降率為51.5%,表明增加煅燒煤矸石粉摻量,明顯有利于改善混凝土的抗硫酸鹽侵蝕性能。
[Abstract]:The method of soaking sodium sulfate solution for a long time was used to evaluate the quality loss rate, compressive strength, compressive strength change rate and splitting tensile strength. The effect of calcined coal gangue powder in concrete under sulphate environment was studied. The results showed that the mass loss rate of each sample decreased with the increase of immersion age when the cement was replaced by 10% 10% coal gangue powder and immersed for 10 months. After soaking for 10 ~ 14 months, the mass loss rate decreased with the increase of the content and was obviously lower than that of the standard group, and the splitting tensile strength and compressive strength of the calcined coal gangue powder samples with different substitution rates were higher than those of the standard group after soaking for 14 months. The increase rate of compressive strength is 17.2 / 22.4and 38.2, respectively, while the decrease rate of compressive strength of the standard group is 51.5, which indicates that increasing the content of calcined coal gangue powder can obviously improve the sulphate resistance of concrete.
【作者單位】： 南華大學(xué)土木工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51378247)
【分類(lèi)號(hào)】：TU528
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本文編號(hào)：1640638