High-strength impervious concrete and preparation method thereof

Abstract

The invention discloses high-strength impervious concrete and a preparation method thereof. the high-strength impervious concrete comprises the following components in parts by weight: 320-350 parts of cement, 120-150 parts of fly ash, 65-95 parts of mineral powder, 850-900 parts of crushed stone, 820-850 parts of medium sand, 2-6 parts of a water reducing agent, 170-190 parts of water, 10-26 parts of an impervious composition, and 100-120 parts of a coarse aggregate, wherein the impervious composition comprises the following components in parts by weight: 10-25 parts of modified rubber particles, 15-25 parts of a fiber composition, 20-30 parts of steel slag, 10-15 parts of boron trioxide, 15-25 parts of gypsum, and 10-15 parts of superabsorbent resin, and the fiber composition comprises carbon fiber, polypropylene fiber, calcium formate and polyamide with a mass ratio of 1:0.7-1.4:0.4-0.8:1.5-2.5. The high-strength impervious concrete has the advantages of high strength, good impermeability and easy pumping.

Description

technical field [0001] The invention relates to the technical field of building materials, more specifically, it relates to a high-strength impermeable concrete and a preparation method thereof. Background technique [0002] With the development of urban construction, the use of concrete is becoming more and more extensive. Concrete is one of the most important contemporary civil engineering materials; it is prepared in a certain proportion from cementitious materials, granular aggregates, water, and admixtures and admixtures added when necessary, and is uniformly stirred, densely formed, cured A hardened artificial stone. As buildings have higher and higher requirements for the strength of concrete itself, high-strength concrete has also emerged as the times require. [0003] In the prior art, the Chinese invention patent with the application number CN200810229940.2 discloses a high-strength concrete, which is composed of the following raw materials, in terms of the weigh...

AI Technical Summary

Problems solved by technology

However, the use of air-entraining admixtures and expansion admixtures has disadvantages. When improving the impermeability of concrete, it has a negative impact on the mechanical properties of concrete. Among them, the use of air-entraining admixtures makes Disconnected air bubbles are generated inside the concrete, which cut off the capillary channel, resulting in poor hydration-limited strength of the concrete in the air bubble area, and the alkali-aggregate reaction in the air bubble area is more active, resulting in unevenly distributed air bubbles in the outer area The stress concentration of the concrete due to expansion, the overall toughness of the concrete is reduced, the strength is low and it is easy to break

The concrete mixed with expansion agent is affected by the expansion rate, the expansion rate increases, and the mechanical properties such as the strength of the concrete decrease.

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