Concrete mud retarder

Abstract

The invention discloses a concrete mud retarder. The concrete mud retarder comprises 50-80wt% of an aqueous polymer, 5-20wt% of gallic acid and 10-30wt% of diethylene glycol. A production technology of the aqueous polymer comprises the following steps: 1, taking 4-7 parts by weight of hydrogen peroxide and 8 parts by weight of water, and completely dissolving hydrogen peroxide in water to obtain a solution I; 2, taking 2-4 parts by weight of rongalite and 8 parts by weight of water, and completely dissolving rongalite in water to obtain a solution; 3, adding 35-40 parts by weight of water, respectively adding 7 parts by weight of acrylamide, 9 parts by weight of maleic anhydride and 21 parts by weight of allyl ether, and stirring; 4, adding 0.5-2 parts by weight of a chain transferring agent; and 5, heating to 40DEG C, simultaneously adding the solution I and the solution II in a dropwise manner, and controlling the reaction temperature to be 40-50DEG C and the dropwise addition time to be 2-4h, and cooling to 30DEG C after the above reaction in order to obtain the aqueous polymer with the solid content of 38-42%. The concrete mud retarder can reduce adsorption of a concrete water reducer on soil particles, improves the fluidity of a high-mud concrete system, and greatly improves the slump keeping property of the concrete water reducer.

Description

Technical field [0001] The invention relates to a concrete admixture, in particular to a concrete mud inhibitor used when the mud content in concrete aggregate is relatively high. Background technique [0002] With the development of concrete technology, concrete water reducer has become one of the indispensable components in the concrete system. In particular, the emergence of the third-generation polycarboxylic acid water-reducing agent, due to its higher water-reducing rate, gives concrete better construction performance, while significantly improving concrete setting time, strength, durability and other performance indicators. In the cement hydration system, the concrete water reducing agent is adsorbed on the surface of the cement hydration product and reaches a balance between the aqueous solution and the surface of the hydration product. Then in the construction process, due to the influence of the high mud content in the aggregate, the concrete water reducing agent is pr...

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Problems solved by technology

Then, during the construction process, due to the influence of high mud content in the aggregate, the concrete water-reducing agent is preferentially absorbed by the soil, and the water-reducing effect of the concrete water-reducing agent is greatly reduced, which brings great difficulties to concrete construction and concrete quality control. difficulty

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