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A platform for research: civil engineering, architecture and urbanism
Preparation process of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses a preparation process of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The composite water reducing agent is prepared through the reaction processes of oxidation, acidification, etherification, grafting, neutralization and the like. The content of the modified cassava starch in the composite water reducing agent reaches 20% or above, and when the mixing amount of the water reducing agent is 0.3%, the coagulation time exceeds 24 h, and the requirement of the super retarder is met; and when the mixing amount of the composite water reducing agent is 1%, the initial fluidity of the cement paste is greater than 200mm. The development and application of the cassava starch water reducing agentare beneficial to improving the processing technology of the water reducing agent, improving the product quality of the water reducing agent and reducing the environmental pollution, and can effectively solve the problem of output of Guangxi agricultural products and improve the additional value of the products.
本发明公开了一种改性木薯淀粉‑聚羧酸复合减水剂的制备工艺，属于建筑材料领域。所述的复合减水剂经过氧化、酸化、醚化、接枝、中和等反应工序制成的。改性木薯淀粉在复合减水剂中的含量达20%以上，当减水剂掺量为0.3％时，凝结时间已超过24h，达到超缓凝剂的要求；复合减水剂掺量为1%时，水泥净浆初始流动度大于200mm。本木薯淀粉减水剂的开发应用有助于改进减水剂加工工艺、提高减水剂产品质量、降低环境污染，还能有效解决广西农产品的出路，提高产品附加值。
Preparation process of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses a preparation process of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The composite water reducing agent is prepared through the reaction processes of oxidation, acidification, etherification, grafting, neutralization and the like. The content of the modified cassava starch in the composite water reducing agent reaches 20% or above, and when the mixing amount of the water reducing agent is 0.3%, the coagulation time exceeds 24 h, and the requirement of the super retarder is met; and when the mixing amount of the composite water reducing agent is 1%, the initial fluidity of the cement paste is greater than 200mm. The development and application of the cassava starch water reducing agentare beneficial to improving the processing technology of the water reducing agent, improving the product quality of the water reducing agent and reducing the environmental pollution, and can effectively solve the problem of output of Guangxi agricultural products and improve the additional value of the products.
本发明公开了一种改性木薯淀粉‑聚羧酸复合减水剂的制备工艺，属于建筑材料领域。所述的复合减水剂经过氧化、酸化、醚化、接枝、中和等反应工序制成的。改性木薯淀粉在复合减水剂中的含量达20%以上，当减水剂掺量为0.3％时，凝结时间已超过24h，达到超缓凝剂的要求；复合减水剂掺量为1%时，水泥净浆初始流动度大于200mm。本木薯淀粉减水剂的开发应用有助于改进减水剂加工工艺、提高减水剂产品质量、降低环境污染，还能有效解决广西农产品的出路，提高产品附加值。
Preparation process of modified cassava starch-polycarboxylic acid composite water reducing agent
改性木薯淀粉-聚羧酸复合减水剂的制备工艺
HE FUQIANG (author) / WANG WANXUAN (author) / PAN AIMEI (author)
2020-07-07
Patent
Electronic Resource
Chinese
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