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A platform for research: civil engineering, architecture and urbanism
Modified limestone powder mineral admixture and preparation method thereof
The invention provides a modified limestone powder mineral admixture, and belongs to the technical field of building materials. The admixture is prepared from the following components in percentage bymass: 75 to 85 percent of limestone powder, 0.03 to 0.05 percent of triethanolamine, 1 to 4 percent of sodium acetate, 1 to 4 percent of calcium formate, 1 to 4 percent of barium nitrate, 5 to 10 percent of superfine mineral powder and 3 to 6 percent of zeolite powder. The preparation method of the mineral admixture comprises the following steps: dissolving calcium formate and barium nitrate in deionized water to form a solution, slowly pouring the solution into zeolite powder, and stirring to obtain zeolite powder slurry; carrying out ball milling on the zeolite powder slurry, limestone powder, triethanolamine, sodium acetate and ultrafine mineral powder; and dispersing the ball-milled material at a high speed at a specific temperature, and sieving. The mineral admixture can effectivelyimprove the specific surface area and the grinding efficiency of limestone particles, performs adsorption modification on the surface of limestone powder, can improve the early strength and reinforcethe later strength of concrete after being doped into the concrete, and optimizes and improves the capability of the concrete for resisting the erosion of xonotlite type sulfate.
本发明提供一种改性石灰石粉矿物掺合料，属于建筑材料技术领域。所述掺合料由包括以下质量百分比的各组分制备而成：石灰石粉75～85％，三乙醇胺0.03～0.05％，乙酸钠1～4％，甲酸钙1～4％，硝酸钡1～4％，超细矿粉5～10％，沸石粉3～6％。所述矿物掺合料的制备方法：将甲酸钙和硝酸钡溶解于去离子水中形成溶液，缓慢倒入沸石粉中，搅拌得到沸石粉浆体；将沸石粉浆体与石灰石粉、三乙醇胺、乙酸钠以及超细矿粉进行球磨；将球磨后的物料在特定的温度下高速分散，过筛即可。本发明矿物掺合料能有效的提高石灰石颗粒的比表面积及粉磨效率，对石灰石粉表面进行吸附改性，掺入混凝土中可以提高混凝土的早期强度和强化后期强度，优化改善混凝土抵抗碳硫硅钙石型硫酸盐侵蚀的能力。
Modified limestone powder mineral admixture and preparation method thereof
The invention provides a modified limestone powder mineral admixture, and belongs to the technical field of building materials. The admixture is prepared from the following components in percentage bymass: 75 to 85 percent of limestone powder, 0.03 to 0.05 percent of triethanolamine, 1 to 4 percent of sodium acetate, 1 to 4 percent of calcium formate, 1 to 4 percent of barium nitrate, 5 to 10 percent of superfine mineral powder and 3 to 6 percent of zeolite powder. The preparation method of the mineral admixture comprises the following steps: dissolving calcium formate and barium nitrate in deionized water to form a solution, slowly pouring the solution into zeolite powder, and stirring to obtain zeolite powder slurry; carrying out ball milling on the zeolite powder slurry, limestone powder, triethanolamine, sodium acetate and ultrafine mineral powder; and dispersing the ball-milled material at a high speed at a specific temperature, and sieving. The mineral admixture can effectivelyimprove the specific surface area and the grinding efficiency of limestone particles, performs adsorption modification on the surface of limestone powder, can improve the early strength and reinforcethe later strength of concrete after being doped into the concrete, and optimizes and improves the capability of the concrete for resisting the erosion of xonotlite type sulfate.
本发明提供一种改性石灰石粉矿物掺合料，属于建筑材料技术领域。所述掺合料由包括以下质量百分比的各组分制备而成：石灰石粉75～85％，三乙醇胺0.03～0.05％，乙酸钠1～4％，甲酸钙1～4％，硝酸钡1～4％，超细矿粉5～10％，沸石粉3～6％。所述矿物掺合料的制备方法：将甲酸钙和硝酸钡溶解于去离子水中形成溶液，缓慢倒入沸石粉中，搅拌得到沸石粉浆体；将沸石粉浆体与石灰石粉、三乙醇胺、乙酸钠以及超细矿粉进行球磨；将球磨后的物料在特定的温度下高速分散，过筛即可。本发明矿物掺合料能有效的提高石灰石颗粒的比表面积及粉磨效率，对石灰石粉表面进行吸附改性，掺入混凝土中可以提高混凝土的早期强度和强化后期强度，优化改善混凝土抵抗碳硫硅钙石型硫酸盐侵蚀的能力。
Modified limestone powder mineral admixture and preparation method thereof
一种改性石灰石粉矿物掺合料及其制备方法
LAN CONG (author) / ZHANG WUZONG (author) / WANG JUN (author) / ZHANG YUAN (author) / LIU DONG (author) / YUAN WENTAO (author) / LIU XIA (author) / ZHU YUN (author) / YANG SHIHAI (author)
2021-02-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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