Concrete admixture, concrete mixture containing admixture and preparation method of concrete mixture

Abstract

The invention relates to the field of concrete, and particularly discloses a concrete admixture, a concrete mixture containing the admixture and a preparation method of the concrete mixture. The concrete admixture comprises the following components: an accelerator; agar powder; carrageenan; konjaku flour; gelatin; and water. The preparation method of the concrete admixture comprises the following steps: step 1, mixing water, agar powder, carrageenan, konjaku flour and gelatin, and heating until the materials are completely dissolved to form a wrapping solution; step 2, uniformly dispersing an accelerator into the wrapping solution; and step 3, cooling to a gel state, and granulating. The concrete mixture containing the admixture comprises the following components: cement; water; sand; a stone; coal ash; the invention discloses a concrete admixture. The preparation method of the concrete mixture comprises the following step: uniformly stirring and mixing all the components to obtain the concrete mixture containing the admixture. The product provided by the invention has the advantages of mixing, pumping and construction performance; the preparation method also has the advantage of simple and convenient preparation.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a concrete admixture, a concrete mix containing the admixture and a preparation method. Background technique [0002] In the construction of soft rock tunnels, it is usually necessary to spray a layer of concrete on the inner wall of the tunnel as the initial support. The shotcrete mixture has been widely used due to its advantages of fast construction speed and high adaptability to the site environment. [0003] The current shotcrete mix is ​​usually mixed with a quick-setting agent in ordinary concrete, so that after the shotcrete mix is ​​sprayed to the inner wall of the tunnel, it solidifies more quickly into solid concrete to form a support structure. However, due to the need to take into account the mixing and pumping time of the concrete mix before construction, the quick-setting time of the shotcrete mix is ​​difficult to control at different construction sites, resulting in the s...

AI Technical Summary

Problems solved by technology

However, due to the need to take into account the mixing and pumping time of the concrete mixture before construction, the rapid setting time of the shotcrete mixture is also difficult to control at different construction sites, resulting in the sprayed concrete mixture being easy to use during the construction process. The setting time is too long, causing the sprayed concrete mixture to fall off under the action of its own weight after being sprayed to the inner wall of the tunnel because it cannot be solidified quickly

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