Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of admixture for bare concrete
The invention discloses a preparation method of an admixture for fair-faced concrete. The admixture is prepared from 25%-28% of a polycarboxylic acid water reducing component, 1.8%-2.1% of a retarding component, 1%-4% of micro-nano-scale hydrated calcium silicate, 0.8%-2% of a color difference adjusting component, 0.02%-0.05% of an air entraining component, 0.04%-0.07% of a defoaming component, 1%-4% of a slow-release hydrophobic component and the balance of purified water. In order to solve the problem that bubbles with large viscosity are difficult to discharge during preparation of fair-faced concrete, the invention provides a polycarboxylic acid water-reducing component which has low shrinkage and viscosity reduction effects and is of a comb-type molecular structure, and on the basis, various functional components are added and compounded to form the fair-faced concrete water-reducing agent. The fair-faced concrete obtained by adding the admixture special for the fair-faced concrete is basically free of bubbles in appearance, excellent in apparent quality and good in early strength effect, has the advantages of low shrinkage and viscosity reduction, and meanwhile is good in fluidity and not prone to segregation and bleeding.
本发明公开了一种清水混凝土用外加剂的制备方法，其组分要点包括：聚羧酸减水组分25%~28%、缓凝组分1.8%~2.1%、微纳米级水化硅酸钙1%~4%、色差调节组分0.8%~2%、引气组分0.02%~0.05%、消泡组分0.04%~0.07%、缓释型疏水组分1%~4%，其余用量为纯净水。本发明针对制备清水混凝土时出现粘度大气泡不易排出的问题，提出了具有低收缩及降粘作用的梳型分子结构的聚羧酸减水组分，在此基础之上添加多种功能性组分复配而成，通过掺加该清水混凝土专用外加剂得到的清水混凝土外观基本无气泡，表观质量优异，早强效果好，具有低收缩、降低粘度优点，同时混凝土的流动性好，不易出现离析泌水的情况。
Preparation method of admixture for bare concrete
The invention discloses a preparation method of an admixture for fair-faced concrete. The admixture is prepared from 25%-28% of a polycarboxylic acid water reducing component, 1.8%-2.1% of a retarding component, 1%-4% of micro-nano-scale hydrated calcium silicate, 0.8%-2% of a color difference adjusting component, 0.02%-0.05% of an air entraining component, 0.04%-0.07% of a defoaming component, 1%-4% of a slow-release hydrophobic component and the balance of purified water. In order to solve the problem that bubbles with large viscosity are difficult to discharge during preparation of fair-faced concrete, the invention provides a polycarboxylic acid water-reducing component which has low shrinkage and viscosity reduction effects and is of a comb-type molecular structure, and on the basis, various functional components are added and compounded to form the fair-faced concrete water-reducing agent. The fair-faced concrete obtained by adding the admixture special for the fair-faced concrete is basically free of bubbles in appearance, excellent in apparent quality and good in early strength effect, has the advantages of low shrinkage and viscosity reduction, and meanwhile is good in fluidity and not prone to segregation and bleeding.
本发明公开了一种清水混凝土用外加剂的制备方法，其组分要点包括：聚羧酸减水组分25%~28%、缓凝组分1.8%~2.1%、微纳米级水化硅酸钙1%~4%、色差调节组分0.8%~2%、引气组分0.02%~0.05%、消泡组分0.04%~0.07%、缓释型疏水组分1%~4%，其余用量为纯净水。本发明针对制备清水混凝土时出现粘度大气泡不易排出的问题，提出了具有低收缩及降粘作用的梳型分子结构的聚羧酸减水组分，在此基础之上添加多种功能性组分复配而成，通过掺加该清水混凝土专用外加剂得到的清水混凝土外观基本无气泡，表观质量优异，早强效果好，具有低收缩、降低粘度优点，同时混凝土的流动性好，不易出现离析泌水的情况。
Preparation method of admixture for bare concrete
一种清水混凝土用外加剂的制备方法
ZHANG YANLI (Autor:in) / QIAN CHUNXIANG (Autor:in) / LI WEI (Autor:in) / ZHENG CHUNYANG (Autor:in) / LI QINGCHAO (Autor:in)
30.07.2024
Patent
Elektronische Ressource
Chinesisch
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