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A platform for research: civil engineering, architecture and urbanism
Method for improving high-temperature performance of cement-based material by utilizing carbon dioxide
The invention discloses a method for improving high-temperature performance of a cement-based material by using carbon dioxide. The method comprises the following steps of (1) installing a high-puritycarbon dioxide gas cylinder in a curing box system with controllable temperature, humidity and concentration, and setting the conditions in a box as the optimal curing conditions; (2) determining a proper pressure and a water cement ratio range for compression molding; (3) preparing a dry-pressing type cement-based material test piece according to an ideal shape, enabling performance parameters such as the proportion of coarse aggregate, fine aggregate, cement and water to meet national standards, uniformly stirring the raw materials of which the proportion is determined in a stirrer, pouringthe mixture into a mold, and manufacturing the test piece by adopting a compression molding mode; and (4) immediately putting the test piece obtained in the step (3) into a carbon dioxide curing boxin the step (1), enabling a mechanical pressure type cement-based material test piece to fully react with the carbon dioxide, absorbing and fixing carbon dioxide gas to generate calcium carbonate andsilica gel with better high-temperature stability, and effectively improving the high-temperature performance of the cement-based material after the curing age is not less than 7 days. According to the method for improving the high-temperature performance of the cement-based material by using the carbon dioxide, the carbon dioxide gas can be effectively utilized, greenhouse gas emission is reduced, and the concept of converting waste gas into sustainable development green value-added products is met; the residual performance of the cement-based material product before 600 DEG C is effectivelyimproved; the curing age is effectively shortened, and the high-temperature performance is equivalent to the high-temperature performance of common curing for 28 days; and the method can be widely applied to metallurgy, chemical engineering and other special industries in long-term high-temperature environments.
本发明公开了一种利用二氧化碳改善水泥基材料高温性能的方法，包括以下步骤：(1)将高纯度二氧化碳气体瓶安装在温度、湿度、浓度可控的养护箱系统内，并使箱内条件设定为最佳养护条件；(2)确定压制成型的合适压力和水灰比范围；(3)根据理想形状制备干压型水泥基材料试件，粗骨料、细骨料、水泥和水的配比等性能参数需符合国家标准，将确定配合比后的原材料在搅拌机中拌均匀后，即可倒入模具中，采用压制成型的方式制作试件；(4)将步骤(3)得到的试件立即置于步骤(1)所述的二氧化碳养护箱内，使机压型水泥基材料试件与二氧化碳充分反应，吸收并固定二氧化碳气体，生成高温稳定性较好的碳酸钙和硅胶，养护龄期不少于7天后即可有效改善水泥基材料的高温性能。本发明可以有效利用二氧化碳气体，减少温室气体排放量，符合将废气转化为可持续发展绿色增值产品的理念；有效改善水泥基材料制品600℃之前的残余性能；有效缩短养护龄期，与普通养护28天的高温性能相当；可广泛应用于冶金、化工等长期处于高温环境的特殊行业。
Method for improving high-temperature performance of cement-based material by utilizing carbon dioxide
The invention discloses a method for improving high-temperature performance of a cement-based material by using carbon dioxide. The method comprises the following steps of (1) installing a high-puritycarbon dioxide gas cylinder in a curing box system with controllable temperature, humidity and concentration, and setting the conditions in a box as the optimal curing conditions; (2) determining a proper pressure and a water cement ratio range for compression molding; (3) preparing a dry-pressing type cement-based material test piece according to an ideal shape, enabling performance parameters such as the proportion of coarse aggregate, fine aggregate, cement and water to meet national standards, uniformly stirring the raw materials of which the proportion is determined in a stirrer, pouringthe mixture into a mold, and manufacturing the test piece by adopting a compression molding mode; and (4) immediately putting the test piece obtained in the step (3) into a carbon dioxide curing boxin the step (1), enabling a mechanical pressure type cement-based material test piece to fully react with the carbon dioxide, absorbing and fixing carbon dioxide gas to generate calcium carbonate andsilica gel with better high-temperature stability, and effectively improving the high-temperature performance of the cement-based material after the curing age is not less than 7 days. According to the method for improving the high-temperature performance of the cement-based material by using the carbon dioxide, the carbon dioxide gas can be effectively utilized, greenhouse gas emission is reduced, and the concept of converting waste gas into sustainable development green value-added products is met; the residual performance of the cement-based material product before 600 DEG C is effectivelyimproved; the curing age is effectively shortened, and the high-temperature performance is equivalent to the high-temperature performance of common curing for 28 days; and the method can be widely applied to metallurgy, chemical engineering and other special industries in long-term high-temperature environments.
本发明公开了一种利用二氧化碳改善水泥基材料高温性能的方法，包括以下步骤：(1)将高纯度二氧化碳气体瓶安装在温度、湿度、浓度可控的养护箱系统内，并使箱内条件设定为最佳养护条件；(2)确定压制成型的合适压力和水灰比范围；(3)根据理想形状制备干压型水泥基材料试件，粗骨料、细骨料、水泥和水的配比等性能参数需符合国家标准，将确定配合比后的原材料在搅拌机中拌均匀后，即可倒入模具中，采用压制成型的方式制作试件；(4)将步骤(3)得到的试件立即置于步骤(1)所述的二氧化碳养护箱内，使机压型水泥基材料试件与二氧化碳充分反应，吸收并固定二氧化碳气体，生成高温稳定性较好的碳酸钙和硅胶，养护龄期不少于7天后即可有效改善水泥基材料的高温性能。本发明可以有效利用二氧化碳气体，减少温室气体排放量，符合将废气转化为可持续发展绿色增值产品的理念；有效改善水泥基材料制品600℃之前的残余性能；有效缩短养护龄期，与普通养护28天的高温性能相当；可广泛应用于冶金、化工等长期处于高温环境的特殊行业。
Method for improving high-temperature performance of cement-based material by utilizing carbon dioxide
一种利用二氧化碳改善水泥基材料高温性能的方法
LIN ZHONGCAI (author) / MENG YAZI (author)
2021-01-15
Patent
Electronic Resource
Chinese
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