Concrete composite water reducing agent

Abstract

The invention discloses a concrete composite water reducing agent which is prepared by mixing the following raw materials in parts by weight: 35 to 45 parts of para amino benzene sulfonate-sulfonated acetone-formaldehyde condensates, 25 to 35 parts of Beta-naphthalene sulfonate formaldehyde condensates, 15 to 20 parts of mahogany petroleum sulfonate, 10 to 15 parts of calcium lignosulphonate, 5 to 10 parts of triethanolamine, 8 to 14 parts of sulfonate-type waterborne polyurethane, 6 to 12 parts of zinc phosphate, 5 to 10 parts of ash calcium powder, 5 to 10 parts of polyvinylpyrrolidone, 3 to 6 parts of sodium metasilicate, 4 to 8 parts of coal residue, 3 to 6 parts of triterpenoid saponin, 2 to 4 parts of allylthiourea, 2.5 to 4.5 parts of rhamnolipid, 2 to 3 parts of isooctyl triethoxy silane and 4 to 7 parts of auxiliaries. The adding amount of the water reducing agent is low, i.e., the adding amount of the water reducing agent only accounts for 0.4% to 0.8% of the mass of concrete. The water-reducing rate of the water reducing agent can reach up to 20% to 25%. The water reducing agent has a good plasticizing effect, so that the slump of the concrete is obviously increased, and the cohesiveness and the workability of the concrete are improved, wherein the slump of the concrete can be increased by above 180mm, thereby conforming to the requirement of concrete pumping.

Description

technical field [0001] The invention relates to a concrete composite water reducer, which belongs to the field of concrete admixtures. Background technique [0002] Concrete admixtures, referred to as admixtures for short, refer to substances that are added to improve the performance of concrete before or during the mixing of concrete. Because admixtures can effectively improve the performance of concrete and have good economic benefits, they have been widely used in many countries, and their application in engineering has attracted more and more attention, becoming an indispensable material in concrete. Among them, the water reducer is the most important admixture in concrete. It can reduce the mixing water consumption and improve the concrete strength under the condition that the workability of concrete and the amount of cement remain unchanged; or under the condition that the workability and strength remain unchanged. Next, save the amount of cement. However, the water ...

AI Technical Summary

Problems solved by technology

However, the water reducing agents currently used in the market have the disadvantages of large dosage, poor water reducing performance, and poor plasticizing effect, which cannot meet the requirements of the market.

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