Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Slow-release polycarboxylate superplasticizer and preparation method thereof
The invention relates to the technical field of concrete admixtures, and particularly discloses a slow-release polycarboxylate superplasticizer and a preparation method thereof. The slow-release polycarboxylate superplasticizer is prepared from the following raw materials: a polycarboxylate superplasticizer, modified hydrotalcite, modified zeolite and water, the modified hydrotalcite is prepared by heating hydrotalcite and then soaking under an acidic condition; the modified zeolite is prepared by soaking zeolite in strong acid and strong acid salt solution and then heating; the preparation method comprises the following steps: blending unsaturated polyoxyethylene ether and methacrylamide, adding water, stirring until the mixture is dissolved, then adding hydrogen peroxide, and uniformly stirring and mixing; the solution A and the solution B are dropwise added at the same time for 1.5-3 h, and curing is conducted after dropwise adding is completed; adding a sodium hydroxide solution until the pH value is 6, and then adjusting the moisture until the solid content is 35-45%; the preparation method comprises the following steps: blending a polycarboxylate superplasticizer, modified hydrotalcite and modified zeolite, carrying out ultrasonic treatment, blending the obtained mixed solution with absolute ethyl alcohol, carrying out ball milling treatment, and drying. The slump retaining agent has the advantage of meeting the construction requirement of super-long-time slump retaining.
本申请涉及混凝土外加剂技术领域，具体公开了一种缓释型聚羧酸减水剂及其制备方法。缓释型聚羧酸减水剂的原料包括聚羧酸减水剂、改性水滑石、改性沸石和水；改性水滑石是将水滑石加热后在酸性条件下浸泡；改性沸石是将沸石在强酸和强酸盐溶液中浸泡后加热；其制备方法为：将不饱和聚氧乙烯醚和甲基丙烯酰胺共混，加入水，搅拌至溶解，再加入过氧化氢，搅拌混匀；同时滴加A、B溶液，滴加时间为1.5‑3h，滴加完毕后熟化；加入氢氧化钠溶液至pH值为6，然后再调整水分至固含量为35‑45%；将聚羧酸减水剂、改性水滑石和改性沸石共混，超声波处理之后将制得的混合液，和无水乙醇共混，球磨处理，烘干制得。其具有满足超长时间保坍的施工要求的优点。
Slow-release polycarboxylate superplasticizer and preparation method thereof
The invention relates to the technical field of concrete admixtures, and particularly discloses a slow-release polycarboxylate superplasticizer and a preparation method thereof. The slow-release polycarboxylate superplasticizer is prepared from the following raw materials: a polycarboxylate superplasticizer, modified hydrotalcite, modified zeolite and water, the modified hydrotalcite is prepared by heating hydrotalcite and then soaking under an acidic condition; the modified zeolite is prepared by soaking zeolite in strong acid and strong acid salt solution and then heating; the preparation method comprises the following steps: blending unsaturated polyoxyethylene ether and methacrylamide, adding water, stirring until the mixture is dissolved, then adding hydrogen peroxide, and uniformly stirring and mixing; the solution A and the solution B are dropwise added at the same time for 1.5-3 h, and curing is conducted after dropwise adding is completed; adding a sodium hydroxide solution until the pH value is 6, and then adjusting the moisture until the solid content is 35-45%; the preparation method comprises the following steps: blending a polycarboxylate superplasticizer, modified hydrotalcite and modified zeolite, carrying out ultrasonic treatment, blending the obtained mixed solution with absolute ethyl alcohol, carrying out ball milling treatment, and drying. The slump retaining agent has the advantage of meeting the construction requirement of super-long-time slump retaining.
本申请涉及混凝土外加剂技术领域，具体公开了一种缓释型聚羧酸减水剂及其制备方法。缓释型聚羧酸减水剂的原料包括聚羧酸减水剂、改性水滑石、改性沸石和水；改性水滑石是将水滑石加热后在酸性条件下浸泡；改性沸石是将沸石在强酸和强酸盐溶液中浸泡后加热；其制备方法为：将不饱和聚氧乙烯醚和甲基丙烯酰胺共混，加入水，搅拌至溶解，再加入过氧化氢，搅拌混匀；同时滴加A、B溶液，滴加时间为1.5‑3h，滴加完毕后熟化；加入氢氧化钠溶液至pH值为6，然后再调整水分至固含量为35‑45%；将聚羧酸减水剂、改性水滑石和改性沸石共混，超声波处理之后将制得的混合液，和无水乙醇共混，球磨处理，烘干制得。其具有满足超长时间保坍的施工要求的优点。
Slow-release polycarboxylate superplasticizer and preparation method thereof
一种缓释型聚羧酸减水剂及其制备方法
ZHAO YANI (Autor:in) / LU MINGRU (Autor:in) / LIANG SHIQI (Autor:in) / XU YINGJIE (Autor:in)
30.05.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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