Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Suspended early strength agent for low-density cement paste
The invention discloses a suspension early strength agent for low-density cement paste. The suspension early strength agent comprises modified nano mesoporous molecular sieve powder, nano metakaolin, a modified biological polysaccharide copolymer and superfine silicon dioxide powder, the modified nano mesoporous molecular sieve is prepared by carrying out exchange modification on metal cations in a mixed solution of lithium nitrate, lithium chloride and calcium formate and cations in an MCM-48 mesoporous molecular sieve in a template exchange manner, and then carrying out adsorption modification through mixed triethanolamine and triisoethanolamine. The modified biological polysaccharide copolymer is prepared by graft copolymerization of p-styrenesulfonic acid and acrylonitrile on welan gum; the suspension early strength agent for the low-density cement paste is stable in performance at high temperature, the temperature resistance reaches 150 DEG C, the set cement compressive strength of the suspension early strength agent is larger than or equal to 17 MPa/24 h/150 DEG C, and the set cement top compressive strength of the suspension early strength agent is larger than or equal to 7 MPa/48 h/50 DEG C; in practical application, the dosage of the early strength agent is greatly reduced compared with that of the conventional suspending agent, the suspension stability and rheological property of the system are excellent, and the early strength agent has good compatibility with other additives.
本发明公开了一种低密度水泥浆用悬浮早强剂，包括改性纳米介孔分子筛粉末、纳米偏高岭土、改性生物多糖共聚物和超细二氧化硅粉末；改性纳米介孔分子筛采用模板剂交换的方式将硝酸锂、氯化锂和甲酸钙混合溶液中的金属阳离子与MCM‑48介孔分子筛中的阳离子进行交换改性，再经混合的三乙醇胺和三异乙醇胺进行吸附改性制备而成；改性生物多糖共聚物采用对苯乙烯磺酸和丙烯腈对温轮胶进行接枝共聚制备而成；该低密度水泥浆用悬浮早强剂在高温下性能稳定，抗温达150℃，其水泥石抗压强度≥17MPa/24h/150℃，水泥石顶部抗压强度≥7MPa/48h/50℃；在实际应用中，该早强剂相对于现有常规使用的悬浮剂加量大大减少，体系的悬浮稳定性、流变性均表现优异，且与其它外加剂配伍性好。
Suspended early strength agent for low-density cement paste
The invention discloses a suspension early strength agent for low-density cement paste. The suspension early strength agent comprises modified nano mesoporous molecular sieve powder, nano metakaolin, a modified biological polysaccharide copolymer and superfine silicon dioxide powder, the modified nano mesoporous molecular sieve is prepared by carrying out exchange modification on metal cations in a mixed solution of lithium nitrate, lithium chloride and calcium formate and cations in an MCM-48 mesoporous molecular sieve in a template exchange manner, and then carrying out adsorption modification through mixed triethanolamine and triisoethanolamine. The modified biological polysaccharide copolymer is prepared by graft copolymerization of p-styrenesulfonic acid and acrylonitrile on welan gum; the suspension early strength agent for the low-density cement paste is stable in performance at high temperature, the temperature resistance reaches 150 DEG C, the set cement compressive strength of the suspension early strength agent is larger than or equal to 17 MPa/24 h/150 DEG C, and the set cement top compressive strength of the suspension early strength agent is larger than or equal to 7 MPa/48 h/50 DEG C; in practical application, the dosage of the early strength agent is greatly reduced compared with that of the conventional suspending agent, the suspension stability and rheological property of the system are excellent, and the early strength agent has good compatibility with other additives.
本发明公开了一种低密度水泥浆用悬浮早强剂，包括改性纳米介孔分子筛粉末、纳米偏高岭土、改性生物多糖共聚物和超细二氧化硅粉末；改性纳米介孔分子筛采用模板剂交换的方式将硝酸锂、氯化锂和甲酸钙混合溶液中的金属阳离子与MCM‑48介孔分子筛中的阳离子进行交换改性，再经混合的三乙醇胺和三异乙醇胺进行吸附改性制备而成；改性生物多糖共聚物采用对苯乙烯磺酸和丙烯腈对温轮胶进行接枝共聚制备而成；该低密度水泥浆用悬浮早强剂在高温下性能稳定，抗温达150℃，其水泥石抗压强度≥17MPa/24h/150℃，水泥石顶部抗压强度≥7MPa/48h/50℃；在实际应用中，该早强剂相对于现有常规使用的悬浮剂加量大大减少，体系的悬浮稳定性、流变性均表现优异，且与其它外加剂配伍性好。
Suspended early strength agent for low-density cement paste
一种低密度水泥浆用悬浮早强剂
QI BEN (Autor:in) / MA RURAN (Autor:in) / LIU WENMING (Autor:in) / WU CHAOMING (Autor:in) / YAN ZHENFENG (Autor:in) / ZONG YONG (Autor:in) / LING YONG (Autor:in) / LI XIAOLIN (Autor:in) / ZHU YU (Autor:in)
17.05.2024
Patent
Elektronische Ressource
Chinesisch
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