Concrete performance regulator and preparation method thereof

Abstract

The invention discloses a concrete performance regulator. The concrete performance regulator is prepared from the following components by mass percent: 14 to 25 percent of acrylamide, 3 to 10 percent of AMPS, 4 to 10 percent of cross-linking agent, 8 to 20 percent of sorbitol, 3 to 10 percent of initiator, and 50 to 68 percent of water, wherein the initiator is an oxidization reduction system and consists of a reducing agent and an oxidant, the reducing agent accounts for 1 to 5 percent of the total mass of the formula, and the oxidant accounts for 2 to 8 percent of the total mass of the oxidant. The concrete performance regulator contains a three-dimensional netted structure, so that the dispersity of a binding material can be improved, the mixability of the concrete is improved, the compatibility with polycarboxylate superplasticizer is good, and the concrete performance regulator is suitable for various sand aggregates.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a concrete performance regulator, and also to a preparation method of the concrete performance regulator. Background technique [0002] In recent years, with the continuous increase of the amount of engineering construction, the amount of concrete has continued to rise, and the requirements for concrete strength, construction difficulty and durability have also continued to increase. Therefore, the research on admixtures for improving the performance of concrete has continued to develop. For example, Chinese patent CN2014107176014 discloses a concrete viscosity regulator whose composition (molar ratio) is cationic monomer:anionic monomer:internal crosslinking agent=1:(0.5~5):(0.01~0.1), which is used to improve Concrete viscosity and inhibition of concrete segregation and bleeding; Chinese patent CN2016102012568 discloses a concrete admixture, which is composed of the following raw materia...

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Problems solved by technology

For example, Chinese patent CN2014107176014 discloses a concrete viscosity modifier whose composition (molar ratio) is cationic monomer: anionic monomer: internal crosslinking agent = 1: (0.5~5): (0.01~0.1), which is used to improve Concrete viscosity and inhibition of concrete segregation and bleeding; Chinese patent CN2016102012568 discloses a concrete admixture, which is composed of the following raw materials in parts by weight: 25-33 parts of rice broken wood, 35-42 parts of polyacrylamide, 8-15 parts of sodium acetate, 20-28 parts of octadecylamine emulsion is used to improve the workability and bleeding of concrete; Chinese patent CN2014106580405 discloses a concrete synergist, which consists of 20-35% by weight of raw materials: triethanolamine, propylene glycol Methyl cellulose 15-28%, polyacrylamide 10-15%, polycarboxylate superplasticizer 20-26%, sodium lignosulfonate 5-12%, silica fume 2-6%, sodium tripolyphosphate 1-5%, sodium dodecylbenzene sulfonate 0.001-0.006%, sodium gluconate 0.01-0.05%, can improve concrete workability and anti-bleeding and segregation, but in order to improve the compressive strength and flexural resistance of concrete The strength and composition are relatively complex; Chinese patent CN2014100241309 discloses a concrete thickening and water-retaining agent. The percentages of raw materials used are: polyacrylamide 10%, hydrolysis catalyst 8%, water 82%, which can improve the workability of concrete and inhibit concrete bleeding; Chinese patent CN201410404173X discloses a retarded high-fluidity and high-strength underwater concrete additive, the components of which include kaolin and composite modifiers, which improve the fluidity and durability of underwater concrete

[0003] The admixtures of the above technologies have improved the workability of concrete, but they are not aimed at the common C25 and C30 concrete. Due to the low amount of glue used in C25 and C30, the aggregate gradation is not ideal, and it is prone to stone accumulation, slurry bleeding, Bleeding and other adverse phenomena, at the same time, most of the above-mentioned admixtures do not reflect the solution to the compatibility problem of polycarboxylate superplasticizers, and cannot meet the increasing demand for polycarboxylate superplasticizers for concrete used in modern construction projects

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