Cold-resistant concrete and preparation method thereof

Abstract

The invention discloses cold-resistant concrete and a preparation method thereof. The cold-resistant concrete is prepared from the following components in parts by weight: 160-238 parts of cement, 210-245 parts of water, 825-850 parts of carborundum, 960-1210 parts of gravel, 60-70 parts of mineral powder, 50-60 parts of plant ash, 40-50 parts of fly ash, 10-10.5 parts of YY-water reducing agent, 36-38 parts of expanding agent, 2-3 parts of polyethylene glycol trimethyl nonyl ether, 2-3 parts of tetrapolyethylene glycol monolauryl ether, 10-18 parts of HY-2 type self-compacting concrete additive, 0.5-0.8 part of PAN fiber and 0.4-0.6 part of PVA fiber. The cold-resistant concrete disclosed by the invention has beneficial cold resistance and cracking resistance.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a cold-resistant concrete and a preparation method thereof. Background technique [0002] With the increase of investment in infrastructure in our country, the application of concrete is more and more extensive, and the phenomenon of concrete cracking is also becoming more and more serious. Especially in cities with many low temperature conditions, concrete cracking will affect its normal use function and durability. When the crack width exceeds a certain limit, it will not only affect the bearing capacity, stiffness and normal use function of concrete components, but also affect the chlorine The penetration of ion plasma provides a path, which causes a series of durability problems such as steel corrosion. Controlling concrete cracks, preventing and reducing concrete cracking under low temperature conditions is of great significance. [0003] CN107266003A discloses a kind of e...

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Problems solved by technology

[0004] Furthermore, the disadvantages of the concrete mixer are: 1. The inclination angle of the mixing tank of the concrete mixer is mostly fixed, and it is inconvenient to discharge; 2. It is difficult to clean the above-mentioned concrete mixer, and the concrete is easy to agglomerate and easily damages the mixer; 3) It is made of concrete There are many kinds of raw materials to be mixed, which need to be weighed separately, and then put into the mixer for mixing. During the operation, each raw material needs to be manually transported from the storage position to the position of the mixer. Conducive to the overall regularity of the factory

[0005] In the prior art, especially in the cold winter in the northern region, that is, under low temperature conditions, concrete is prone to cracking, especially under the condition of low temperature and external force, the cracking phenomenon is particularly obvious, and the above problems need to be solved

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