【摘要】：研究了硫酸鹽作用下大理石粉對(duì)水泥固化氯離子性能的影響規(guī)律及作用機(jī)理。試驗(yàn)結(jié)果表明:水泥-大理石粉硬化漿體氯離子固化率,1 d齡期之前快速增長(zhǎng),1~3 d齡期增長(zhǎng)變緩,3~7 d齡期進(jìn)一步減緩,7~28 d齡期時(shí)增加緩慢,1 d、3 d和7 d齡期的分別達(dá)到28 d的50%、70%和95%。隨著大理石粉摻量的增加,水泥漿體的氯離子固化率,6 h、12 h、1 d齡期增大,3 d、7 d、28 d齡期降低;隨著硫酸鹽濃度增加,其氯離子固化率降低。XRD分析表明大理石粉對(duì)水泥漿體28 d齡期的Freidel's鹽生成量影響不大,硫酸鹽抑制水泥-大理石粉漿體Freidel's鹽生成。
[Abstract]:The effect of marble powder on the properties of cement curing chloride ion under the action of sulfate was studied. The experimental results show that the chloride ion curing rate of cement-marble powder hardened paste increases rapidly before 1 d age, slows down at 1 d age, slows down at 3 d age, slows down further at 3 d age, increases slowly at 7 d age, and increases slowly at 7 d age for 1 d. The age of 3 d and 7 d was 50%, 70% and 95% of that of 28 d, respectively. With the increase of marble powder content, the chloride ion curing rate of cement paste increased at 1 d at 6 h and 12 h, increased at 3 d, decreased at 28 d at 7 d, and decreased at 28 d at 6 h, 12 h, 3 d, 7 d and 28 d, respectively. With the increase of sulfate concentration, the curing rate of chloride ion decreased. XRD analysis showed that marble powder had little effect on the formation of Freidel's salt at 28 d age, and sulfate inhibited the formation of Freidel's salt in cement-marble paste.
【作者單位】： 中南大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51278497)
【分類號(hào)】：TU52
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本文編號(hào)：2492756