| abstract |
The invention discloses a new type of polycarboxylate water reducer for machine-made sand and a preparation method thereof. This new type of polycarboxylate water reducer for machine-made sand is obtained by polymerization of polyether macromonomer, dopamine-modified polyether macromonomer, unsaturated carboxylic acid, unsaturated carboxylate, and dopamine monomer. The invention effectively enhances the adhesion ability of the water reducing agent molecules to the low surface energy cleavage surface of the machine-made sand by introducing the most effective functional group catechol group for the adhesion of the mussel protein into the polymer structure, so that the The slurry can reduce viscosity and thicken, reduce bleeding and slurry, and effectively improve the workability and uniformity of concrete mixtures. And because the catechol group can also form good coordination and hydrogen bond interaction on the surface of the sand and gravel, it can effectively improve the overall uniformity of the mixture and the mechanical properties and durability after molding. |