Environment-friendly composite early-strength water reducing agent and preparation method thereof

Abstract

The invention discloses an environment-friendly composite early-strength water reducing agent, which is characterized by including the following components in parts by weight: 15 to 20 parts of 3-(1-naphthyl) acrylic acid/3-[N, N-dimethyl-[2-(2-methylprop-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer; 4 to 8 parts of hyperbranched polylysine; 2-5 parts of sodium alginate; 4 to 7 parts of celestite; 1-3 parts of spar; 1 to 3 parts of N-(3-triethoxysilylpropyl) glucosamide; and 30-40 parts of water. The invention also discloses apreparation method of the environment-friendly composite early strength water reducing agent. The environment-friendly composite early-strength water reducing agent disclosed by the invention is remarkable in early-strength water reducing effect, small in mixing amount, capable of effectively improving the compressive strength of concrete, reducing the shrinkage rate of the concrete and shorteningthe production period of the concrete, free of obvious negative effects on the comprehensive performance of the concrete, and green and environment-friendly in preparation and use processes.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to an environment-friendly composite early-strength water reducer and a preparation method thereof. Background technique [0002] With the acceleration of urban modernization, various major construction projects are coming one after another. They are imprinting modern civilization on today's cities with fashionable, beautiful and safe elements, and have become a beautiful landscape of modern cities. Behind these major construction projects, various construction engineering materials are inseparable. Concrete is one of the most common construction engineering materials. It uses cement as the gel material, sand and stone as the aggregate, and water Prepared by mixing. In the process of concrete preparation, admixtures are indispensable, and they are the key factors that determine the quality of concrete. It is particularly important to develop concrete admixtures with exce...

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Problems solved by technology

However, sodium nitrite, a toxic and harmful substance, is added to it. It is oxidized in the air, and its action time is supplemented. It is easy to decompose and produce dinitrogen trioxide gas under weak acidic conditions. It can be seen that this early-strength water reducer is not environmentally friendly. Performance stability is not high

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