A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Slow-release polycarboxylic acid concrete water reducing agent with good fluidity and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to a slow-release polycarboxylic acid concrete water reducing agent with good flowability and a preparation method of the slow-release polycarboxylic acid concrete water reducing agent. The preparation method comprises the following steps: adding chlorinated polycarboxylic acid, modified polyether and methacrylic acid into a stirring kettle, heating and uniformly mixing; taking out the content, cooling and stirring to generate a basic solution; adding a slump retaining agent, an initiator and deionized water into the basic solution, and mixing to generate an intermediate solution; and adding a dispersing agent and a stabilizing agent into the intermediate solution, removing the precipitate, and dehydrating to prepare the water reducing agent. By adding the dispersing agent and the stabilizer, liquid particles can be uniformly dispersed, sedimentation and condensation of the liquid particles can be prevented, the stability and durability of the concrete can be improved, oxidized polyethylene wax can react with sodium dodecyl benzene sulfonate to generate sodium vinyl sulfonate with olefin double bonds and reactive sulfonic acid groups, and the stability and durability of the concrete are improved. The water reducer can be used as a water loss inhibitor to improve the slump of concrete, and can also be used as a dispersing aid to improve the flowability of the water reducer.
本发明涉及混凝土外加剂技术领域，具体地说，涉及一种流动性好的缓释型聚羧酸混凝土减水剂及其制备方法。其包括以下步骤：将氯化聚羧酸、改性聚醚和甲基丙烯酸投入搅拌釜中加热混匀；取出内容物并降温搅拌产生基础液；向基础液中加入保坍剂、引发剂后和去离子水，混合后产生中间液；向中间液加入分散剂和稳定剂后，去除沉淀并脱水制减水剂。本发明通过添加分散剂和稳定剂能够均一分散液体颗粒，并防止液体颗粒的沉降和凝聚，能够提高混凝土的稳定性和耐久性，并且氧化聚乙烯蜡会与十二烷基苯磺酸钠反应，生成具有烯烃双键和反应性磺酸基团的乙烯基磺酸钠，既可以作为失水抑制剂改善混凝土的坍落度，也能够作为分散助剂，提高减水剂的流动性。
Slow-release polycarboxylic acid concrete water reducing agent with good fluidity and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to a slow-release polycarboxylic acid concrete water reducing agent with good flowability and a preparation method of the slow-release polycarboxylic acid concrete water reducing agent. The preparation method comprises the following steps: adding chlorinated polycarboxylic acid, modified polyether and methacrylic acid into a stirring kettle, heating and uniformly mixing; taking out the content, cooling and stirring to generate a basic solution; adding a slump retaining agent, an initiator and deionized water into the basic solution, and mixing to generate an intermediate solution; and adding a dispersing agent and a stabilizing agent into the intermediate solution, removing the precipitate, and dehydrating to prepare the water reducing agent. By adding the dispersing agent and the stabilizer, liquid particles can be uniformly dispersed, sedimentation and condensation of the liquid particles can be prevented, the stability and durability of the concrete can be improved, oxidized polyethylene wax can react with sodium dodecyl benzene sulfonate to generate sodium vinyl sulfonate with olefin double bonds and reactive sulfonic acid groups, and the stability and durability of the concrete are improved. The water reducer can be used as a water loss inhibitor to improve the slump of concrete, and can also be used as a dispersing aid to improve the flowability of the water reducer.
本发明涉及混凝土外加剂技术领域，具体地说，涉及一种流动性好的缓释型聚羧酸混凝土减水剂及其制备方法。其包括以下步骤：将氯化聚羧酸、改性聚醚和甲基丙烯酸投入搅拌釜中加热混匀；取出内容物并降温搅拌产生基础液；向基础液中加入保坍剂、引发剂后和去离子水，混合后产生中间液；向中间液加入分散剂和稳定剂后，去除沉淀并脱水制减水剂。本发明通过添加分散剂和稳定剂能够均一分散液体颗粒，并防止液体颗粒的沉降和凝聚，能够提高混凝土的稳定性和耐久性，并且氧化聚乙烯蜡会与十二烷基苯磺酸钠反应，生成具有烯烃双键和反应性磺酸基团的乙烯基磺酸钠，既可以作为失水抑制剂改善混凝土的坍落度，也能够作为分散助剂，提高减水剂的流动性。
Slow-release polycarboxylic acid concrete water reducing agent with good fluidity and preparation method thereof
一种流动性好的缓释型聚羧酸混凝土减水剂及其制备方法
TANG BING (author) / MA GUANYING (author) / LIN HEBIN (author)
2023-09-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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