Preparation process of self-lubricating spherical polycarboxylic acid high-performance water reducing agent: Fid-Bau Portal

Preparation process of self-lubricating spherical polycarboxylic acid high-performance water reducing agent

ZHANG TIANMING

The invention discloses a preparation process of a self-lubricating spherical polycarboxylic acid high-performance water reducing agent, and belongs to the field of water reducing agents, the preparation process of the self-lubricating spherical polycarboxylic acid high-performance water reducing agent comprises the following steps: copolymerizing to prepare glue; wrapping the sandwich; preparing modified sandwich balls; wrapping the polycarboxylic acid polymer by the modified sandwich ball formed by the polyacrylamide glue and the nano-scale calcium oxide particles, and forming the spherical structure by the modified sandwich ball and the polycarboxylic acid polymer. The lubrication degree of the polycarboxylic acid polymer during the use is improved, the friction force between the particles is reduced, and the viscosity of the concrete is reduced to a certain extent; the concrete construction is convenient, the construction difficulty is reduced, the construction cost is reduced, and the polyacrylamide is hydrolyzed during the use so as to effectively react with water to produce heat, such that the temperature influence of the water reducing agent during the use is improved, the environmental applicability of the water reducing agent is improved, and the slump loss resistance of the water reducing agent is improved.

本发明公开了一种自润滑型球状聚羧酸系高性能减水剂的制备工艺，属于减水剂领域，一种自润滑型球状聚羧酸系高性能减水剂的制备工艺，包括如下步骤：共聚制胶；包裹夹心；制备改性夹心球；可以通过使聚丙烯酰胺胶和纳米级的氧化钙颗粒形成的改性夹心球对聚羧酸系聚合物进行包裹，并与聚羧酸系聚合物形成球状结构，提高聚羧酸系聚合物在使用时的润滑程度，减少颗粒之间的摩擦力，一定程度上降低了混凝土的粘度，便于混凝土的施工，降低了施工难度，降低施工成本，并且在使用过程中由于聚丙烯酰胺产生水解，使氧化钙能够有效与水反应，产生热量，改善减水剂在使用过程中的温度影响，提高减水剂的环境适用性，提高其的保坍性。

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