Slump retaining type concrete synergist and preparation method thereof

Abstract

The invention discloses a slump retaining type concrete synergist and a preparation method thereof. The concrete synergist is prepared from the following substances in parts by weight: 12-20 parts ofa reinforcing agent, 8-15 parts of a regulator, 5-10 parts of an alkanol acrylate copolymer, 3-8 parts of maleic anhydride, 4-8 parts of a retarder, 2-5 parts of a lubricant and the balance of water.According to the invention, the polyol can make the cement fully hydrated; after the active sodium salt is doped into the concrete to promote the generation of low-sulfur calcium sulphoaluminate and hexagonal plate solid solution, the hexagonal plate solid solution fills internal pores and capillary channels of the concrete, so that the compactness of the concrete is improved, and the strength ofthe concrete is promoted to be improved. The alkanol acrylate copolymer can control the slump loss of concrete over time, so that the [xi] potential of the surface layer of cement particles is kept unchanged, and the cement particles are uniformly dispersed. Under the synergistic effect of the components, the synergist can obviously improve the early strength and later strength of concrete.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a slump-preserving concrete synergist and a preparation method thereof. Background technique [0002] With the rapid development of our country's economy and the improvement of the construction level, the construction industry has achieved unprecedented development, the infrastructure has been continuously updated and improved, and the scale of construction has been unprecedented. Concrete in building materials has been widely used in municipal, railway, highway, port, bridge and other fields due to its abundant raw materials, low price, simple production process, and environmental friendliness. Cement is the main component of concrete and also the most expensive part of concrete. According to a large number of studies, there is still a part of cement in concrete that has not been completely dispersed and hydrated, resulting in the inability to fully play its due rol...

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Problems solved by technology

[0004] In the patent application CN1106904867A, a kind of concrete synergist containing sodium chitosan sulfonate has been reported, and the synergist is composed of sodium chitosan sulfonate, inorganic alkali , epoxy compound, (3-glycidoxypropyl) allyloxydimethoxysilane, initiator and water. After adding this synergist, the compressive strength of concrete is improved to a certain extent, but in The actual preparation process will be accompanied by certain side reactions, resulting in unstable effects of the synergist, and it can be seen from the experimental data that in the concrete slump loss test, the slump loss of 1 hour after using this additive is not obtained. Significant improvement

[0005] patent application CN110903435A reports a synergist and its preparation method, which uses a common water reducer in the market as a matrix, and acts on unsaturated carboxylic acid and sugar compound According to the relevant patent data, this synergist does improve the early strength of concrete, but does not significantly improve the later strength of concrete

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