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Air-entraining type polycarboxylate superplasticizer and preparation method thereof
The invention relates to the field of concrete admixtures, and particularly discloses an air-entraining type polycarboxylic acid water reducer and a preparation method thereof. The air-entraining type polycarboxylate superplasticizer is prepared from the following raw materials in parts by weight: 320 to 380 parts of unsaturated polyether macromonomer, 10 to 30 parts of air-entraining type functional monomer, 26 to 50 parts of unsaturated carboxylic acid or unsaturated carboxylic acid derivative, 1 to 4 parts of oxidizing agent, 0.5 to 2 parts of reducing agent, 0.6 to 2.8 parts of chain transfer agent, 18 to 30 parts of neutralizing agent and 500 to 600 parts of water, the preparation method of the air-entraining type functional monomer comprises the following steps: crushing maleated rosin, mixing the crushed maleated rosin with 48% liquid caustic soda, heating to 100-125 DEG C, carrying out heat preservation reaction for 1-2 hours, and adding water for dilution after the reaction is finished. According to the polycarboxylate superplasticizer, the air-entraining type functional monomer is added, so that the dispersity of the superplasticizer is not influenced, the polycarboxylate superplasticizer has relatively low air-entraining property, and the polycarboxylate superplasticizer has the advantages of improving the workability of concrete and increasing the freezing resistance and durability of the concrete at the same time.
本申请涉及混凝土外加剂领域，具体公开了一种引气型聚羧酸减水剂及其制备方法。一种引气型聚羧酸减水剂，包括以下重量份的原料：不饱和聚醚大单体320‑380份、引气型功能单体10‑30份、不饱和羧酸或不饱和羧酸衍生物26‑50份、氧化剂1‑4份、还原剂0.5‑2份、链转移剂0.6‑2.8份、中和剂18‑30份和水500‑600份；所述引气型功能单体的制法为：将马来松香粉碎，与48%液体烧碱混合后，升温至100‑125℃，保温反应1‑2h，反应结束后，加水稀释。本申请的聚羧酸减水剂通过添加引气型功能单体，不影响减水剂的分散性且具有较低的引气性，具有改善混凝土和易性同时增加混凝土抗冻性和耐久性的优点。
Air-entraining type polycarboxylate superplasticizer and preparation method thereof
The invention relates to the field of concrete admixtures, and particularly discloses an air-entraining type polycarboxylic acid water reducer and a preparation method thereof. The air-entraining type polycarboxylate superplasticizer is prepared from the following raw materials in parts by weight: 320 to 380 parts of unsaturated polyether macromonomer, 10 to 30 parts of air-entraining type functional monomer, 26 to 50 parts of unsaturated carboxylic acid or unsaturated carboxylic acid derivative, 1 to 4 parts of oxidizing agent, 0.5 to 2 parts of reducing agent, 0.6 to 2.8 parts of chain transfer agent, 18 to 30 parts of neutralizing agent and 500 to 600 parts of water, the preparation method of the air-entraining type functional monomer comprises the following steps: crushing maleated rosin, mixing the crushed maleated rosin with 48% liquid caustic soda, heating to 100-125 DEG C, carrying out heat preservation reaction for 1-2 hours, and adding water for dilution after the reaction is finished. According to the polycarboxylate superplasticizer, the air-entraining type functional monomer is added, so that the dispersity of the superplasticizer is not influenced, the polycarboxylate superplasticizer has relatively low air-entraining property, and the polycarboxylate superplasticizer has the advantages of improving the workability of concrete and increasing the freezing resistance and durability of the concrete at the same time.
本申请涉及混凝土外加剂领域，具体公开了一种引气型聚羧酸减水剂及其制备方法。一种引气型聚羧酸减水剂，包括以下重量份的原料：不饱和聚醚大单体320‑380份、引气型功能单体10‑30份、不饱和羧酸或不饱和羧酸衍生物26‑50份、氧化剂1‑4份、还原剂0.5‑2份、链转移剂0.6‑2.8份、中和剂18‑30份和水500‑600份；所述引气型功能单体的制法为：将马来松香粉碎，与48%液体烧碱混合后，升温至100‑125℃，保温反应1‑2h，反应结束后，加水稀释。本申请的聚羧酸减水剂通过添加引气型功能单体，不影响减水剂的分散性且具有较低的引气性，具有改善混凝土和易性同时增加混凝土抗冻性和耐久性的优点。
Air-entraining type polycarboxylate superplasticizer and preparation method thereof
一种引气型聚羧酸减水剂及其制备方法
WANG LINGRONG (author) / KE YUHAO (author) / ZENG MIN (author) / YUAN JUYAN (author)
2024-12-24
Patent
Electronic Resource
Chinese
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