A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Shrinkage and viscosity reduction type polycarboxylic acid water reducer as well as preparation method and application thereof
The invention relates to the technical field of concrete admixtures, and provides a shrinkage-reducing viscosity-reducing polycarboxylic acid water reducer and a preparation method and application thereof, and the water reducer comprises an unsaturated polyether macromonomer, an unsaturated acid monomer, a shrinkage-reducing functional monomer, a viscosity-reducing functional monomer, an initiator, a chain transfer agent and deionized water. The preparation method comprises the following steps: respectively preparing a mixed solution of a reduction component and a chain transfer agent, a mixed solution of an unsaturated acid monomer, a shrinkage-reducing functional monomer and a viscosity-reducing functional monomer, and a solution of an unsaturated polyether macromonomer, mixing the solutions, completing a polymerization reaction, and adjusting the pH value to 6-7 to obtain the shrinkage-reducing viscosity-reducing polycarboxylic acid water reducer. The preparation method is simple, safe and environment-friendly, and other admixtures such as shrinkage reducing agents, expanding agents or retarders are not required to be compounded. The shrinkage and viscosity reduction type polycarboxylic acid water reducer is used for reducing the shrinkage rate of concrete, the solid mixing amount of the water reducer accounts for 0.1%-0.3% of the mass of a cementing material, and the concrete can have good workability.
本发明涉及混凝土外加剂技术领域，提供了一种减缩降黏型聚羧酸系减水剂及其制备方法与应用，减水剂包括不饱和聚醚大单体、不饱和酸类单体、减缩型功能单体、降黏型功能单体、引发剂、链转移剂和去离子水。制备方法采用以下步骤：分别制备还原组分及链转移剂的混合溶液，不饱和酸类单体、减缩型功能单体和降黏型功能单体的混合溶液，不饱和聚醚大单体的溶液，将上述溶液混合，完成聚合反应，调节pH值至6‑7，即得到减缩降黏型聚羧酸系减水剂。制备方法简单，安全环保，无需复配减缩剂、膨胀剂或缓凝剂等其它外加剂。减缩降黏型聚羧酸系减水剂应用于降低混凝土的收缩率，其使用折固掺量为胶凝材料质量的0.1%‑0.3%，能够使得混凝土具有良好的和易性。
Shrinkage and viscosity reduction type polycarboxylic acid water reducer as well as preparation method and application thereof
The invention relates to the technical field of concrete admixtures, and provides a shrinkage-reducing viscosity-reducing polycarboxylic acid water reducer and a preparation method and application thereof, and the water reducer comprises an unsaturated polyether macromonomer, an unsaturated acid monomer, a shrinkage-reducing functional monomer, a viscosity-reducing functional monomer, an initiator, a chain transfer agent and deionized water. The preparation method comprises the following steps: respectively preparing a mixed solution of a reduction component and a chain transfer agent, a mixed solution of an unsaturated acid monomer, a shrinkage-reducing functional monomer and a viscosity-reducing functional monomer, and a solution of an unsaturated polyether macromonomer, mixing the solutions, completing a polymerization reaction, and adjusting the pH value to 6-7 to obtain the shrinkage-reducing viscosity-reducing polycarboxylic acid water reducer. The preparation method is simple, safe and environment-friendly, and other admixtures such as shrinkage reducing agents, expanding agents or retarders are not required to be compounded. The shrinkage and viscosity reduction type polycarboxylic acid water reducer is used for reducing the shrinkage rate of concrete, the solid mixing amount of the water reducer accounts for 0.1%-0.3% of the mass of a cementing material, and the concrete can have good workability.
本发明涉及混凝土外加剂技术领域，提供了一种减缩降黏型聚羧酸系减水剂及其制备方法与应用，减水剂包括不饱和聚醚大单体、不饱和酸类单体、减缩型功能单体、降黏型功能单体、引发剂、链转移剂和去离子水。制备方法采用以下步骤：分别制备还原组分及链转移剂的混合溶液，不饱和酸类单体、减缩型功能单体和降黏型功能单体的混合溶液，不饱和聚醚大单体的溶液，将上述溶液混合，完成聚合反应，调节pH值至6‑7，即得到减缩降黏型聚羧酸系减水剂。制备方法简单，安全环保，无需复配减缩剂、膨胀剂或缓凝剂等其它外加剂。减缩降黏型聚羧酸系减水剂应用于降低混凝土的收缩率，其使用折固掺量为胶凝材料质量的0.1%‑0.3%，能够使得混凝土具有良好的和易性。
Shrinkage and viscosity reduction type polycarboxylic acid water reducer as well as preparation method and application thereof
一种减缩降黏型聚羧酸系减水剂及其制备方法与应用
DUAN XIUKAI (author) / LEE SANG HOO (author) / KANG IK-SOON (author) / CHEN HAIBIN (author) / WANG WEIDONG (author) / XUE QINGJIE (author) / WANG FAYI (author) / KONG WEI (author) / SUN YUE (author) / XI JING (author)
2023-12-22
Patent
Electronic Resource
Chinese
Viscosity reduction type polycarboxylic acid water reducer and preparation method thereof
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