文献类型：期刊文献

中文题名：温度对白云石粉砂浆强度和水化产物的影响

英文题名：Effect of Temperature on Strength and Hydration Products of Cement Mortars with Dolomite Powders

作者：陈登[1];宋旭艳[1];何智海[2]

机构：[1]苏州科技大学土木工程学院,江苏苏州215011;[2]绍兴文理学院土木工程学院,浙江绍兴312000

年份：2019

卷号：42

期号：6

起止页码：26

中文期刊名：非金属矿

外文期刊名：Non-Metallic Mines

收录：CSTPCD、、北大核心2017、CSCD2019_2020、北大核心、CSCD

基金：国家自然科学基金（517778003）

语种：中文

中文关键词：白云石粉;石灰石粉;强度;水化产物

外文关键词：dolomite powder;limestone powder;strength;hydration product

中文摘要：将白云石粉与石灰石粉水泥砂浆分别采用20℃、40℃和60℃的温度进行养护,对比分析白云石粉和石灰石粉对水泥砂浆强度的影响规律,同时采用X射线衍射仪(XRD)和差热分析仪(DSC)对白云石粉水泥的水化产物进行分析。结果表明:当白云石粉或石灰石粉掺量小于10%时,砂浆强度未明显下降。20℃和40℃养护时,石灰石粉砂浆强度要高于白云石粉砂浆,而在60℃下白云石粉砂浆则要优于石灰石粉砂浆。20℃养护的白云石粉水泥和石灰石粉水泥均可生成单碳铝酸钙,但龄期延长到60 d时,水化产物中的钙矾石含量明显降低。而60℃养护的白云石粉水泥则主要生成水滑石,且水滑石的形成有效稳定了钙矾石的含量,从而更有利于促进砂浆强度的发展。

外文摘要：The cement mortars, prepared with different contents of dolomite powders or limestone powders, were immersed in 20 ℃, 40 ℃ and 60 ℃ water respectively. The effects of dolomite or limestone powders on the strength of cement mortars were investigated. The phase compositions of the hydration products of cement containing dolomite powders were analyzed by using X-ray diffraction(XRD) and differential scanning calorimeter(DSC). Results show that the strengths of cement mortars containing dolomite or limestone powders are close to pure cement mortar when the replacement content is less than 10%. At 20 ℃ and 40 ℃, limestone powders show a positive impact on the promotion of the strength of cement mortars, compared to dolomite powders. However, at 60 ℃, dolomite powders show a more positive impact than limestone on the promotion of the strength. When cured at 20 ℃, dolomite and limestone powders both involve in reaction, forming moncarboalumiate hydrates, but decreasing the content of ettringite at 60 d. At 60 ℃, hydrotalcite is mainly formed in cement pastes containing dolomite powders, meanwhile stabilizing the content of ettringite, it’s beneficial to development of cement mortars.