Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-concentration and particle size-controllable composite nano calcium silicate hydrate dispersion liquid and preparation method thereof
The invention relates to a high-concentration and particle size-controllable composite nano calcium silicate hydrate dispersion liquid and a preparation method thereof. The dispersion liquid is prepared from the following raw materials: a high-performance polycarboxylate superplasticizer, a water-based silane coupling agent, a defoaming agent and water. The preparation method comprises the following steps: mixing the high-performance polycarboxylate superplasticizer, the water-based silane coupling agent, the defoaming agent and the water to prepare a mixed solution with the total mass of M1;separately preparing a calcium nitrate solution and a sodium silicate solution, wherein the mass sum of the calcium nitrate solution and the sodium silicate solution is M2; and starting a high-speed dispersion machine to disperse the mixed solution, dropwise adding the calcium nitrate solution and the sodium silicate solution for 3-8 hours at the reaction temperature of 5-30 DEG C, wherein the ratio of M2 to M1 is (1.5-5.0):1, the molar ratio of calcium to silicon is (0.8-2):1, and the dropwise adding of the two solutions is guaranteed to to be achieved at the same time. The dispersion liquidis high in concentration, good in stability and short in technological process, the final particle size can be regulated and controlled, the cement hydration process can be promoted when the dispersion liquid is used as a concrete early strength agent, and the dispersion liquid has the advantages of being low in mixing amount, fast in concrete early strength improvement and free of influence on later strength.
一种高浓度且粒径可控的复合纳米水化硅酸钙分散液及其制备方法，分散液是由下述原料制成的：高性能聚羧酸减水剂，水性硅烷偶联剂，消泡剂，水。制备方法：将高性能聚羧酸减水剂、水性硅烷偶联剂、消泡剂和水混合，配置成混合溶液，总质量为M1；分别配置硝酸钙溶液和硅酸钠溶液，质量之和为M2；开启高速分散机分散混合溶液，滴加硝酸钙溶液和硅酸钠溶液，反应温度为5～30℃，滴加时间为3～8h，M2与M1之比为1.5～5.0:1，钙和硅的摩尔数之比为0.8～2:1，同时滴完。本发明的分散液浓度高，稳定性好，工艺流程短，可调控最终粒径，其作为混凝土早强剂使用，能促进水泥水化进程，具有掺量低、混凝土早期强度提升快、对后期强度无影响的特点。
High-concentration and particle size-controllable composite nano calcium silicate hydrate dispersion liquid and preparation method thereof
The invention relates to a high-concentration and particle size-controllable composite nano calcium silicate hydrate dispersion liquid and a preparation method thereof. The dispersion liquid is prepared from the following raw materials: a high-performance polycarboxylate superplasticizer, a water-based silane coupling agent, a defoaming agent and water. The preparation method comprises the following steps: mixing the high-performance polycarboxylate superplasticizer, the water-based silane coupling agent, the defoaming agent and the water to prepare a mixed solution with the total mass of M1;separately preparing a calcium nitrate solution and a sodium silicate solution, wherein the mass sum of the calcium nitrate solution and the sodium silicate solution is M2; and starting a high-speed dispersion machine to disperse the mixed solution, dropwise adding the calcium nitrate solution and the sodium silicate solution for 3-8 hours at the reaction temperature of 5-30 DEG C, wherein the ratio of M2 to M1 is (1.5-5.0):1, the molar ratio of calcium to silicon is (0.8-2):1, and the dropwise adding of the two solutions is guaranteed to to be achieved at the same time. The dispersion liquidis high in concentration, good in stability and short in technological process, the final particle size can be regulated and controlled, the cement hydration process can be promoted when the dispersion liquid is used as a concrete early strength agent, and the dispersion liquid has the advantages of being low in mixing amount, fast in concrete early strength improvement and free of influence on later strength.
一种高浓度且粒径可控的复合纳米水化硅酸钙分散液及其制备方法，分散液是由下述原料制成的：高性能聚羧酸减水剂，水性硅烷偶联剂，消泡剂，水。制备方法：将高性能聚羧酸减水剂、水性硅烷偶联剂、消泡剂和水混合，配置成混合溶液，总质量为M1；分别配置硝酸钙溶液和硅酸钠溶液，质量之和为M2；开启高速分散机分散混合溶液，滴加硝酸钙溶液和硅酸钠溶液，反应温度为5～30℃，滴加时间为3～8h，M2与M1之比为1.5～5.0:1，钙和硅的摩尔数之比为0.8～2:1，同时滴完。本发明的分散液浓度高，稳定性好，工艺流程短，可调控最终粒径，其作为混凝土早强剂使用，能促进水泥水化进程，具有掺量低、混凝土早期强度提升快、对后期强度无影响的特点。
High-concentration and particle size-controllable composite nano calcium silicate hydrate dispersion liquid and preparation method thereof
一种高浓度且粒径可控的复合纳米水化硅酸钙分散液及其制备方法
JIA ERPENG (Autor:in) / LIU ZHAOYANG (Autor:in) / LIU SONGGUANG (Autor:in) / DONG SHUQIANG (Autor:in) / LIU XUFEI (Autor:in) / LIU CUIFEN (Autor:in)
04.12.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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