A kind of concrete and preparation method thereof

Abstract

The invention relates to the field of building materials. Aiming at the problem that concrete is prone to segregation or bleeding during the process of mixing and mixing, resulting in pipeline blockage, a concrete is provided, which includes the following components in parts by mass: Portland cement 22.5‑ 30 parts; 45-60 parts of water; 22.5-30 parts of sand; 37.5-50 parts of stone; 1.35-1.8 parts of sulfamate superplasticizer; 10 servings. A method for preparing concrete, comprising the following steps: (1) adding sand and stone to a mixer and stirring uniformly to obtain aggregate; (2) adding microsilica fume and Portland cement while stirring, and stirring uniformly to obtain a premix ; (3) Add the remaining raw materials while stirring, stir evenly and form concrete after curing. By adding carboxymethyl cellulose, it is beneficial to increase the consistency of the cement slurry, which is conducive to the uniform dispersion of sand and stone in the cement slurry, making it easier to mix the concrete evenly, so that the sand and stone are not easy to block the pipeline during pumping. .

Description

technical field [0001] The invention relates to the field of building materials, more specifically, it relates to a concrete and a preparation method thereof. Background technique [0002] Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, concrete refers to the cement concrete obtained by mixing cement with cement as cementing material, sand and stone as aggregate, and water (may contain admixtures and admixtures) in a certain proportion, also known as ordinary concrete. It is widely used in civil engineering. [0003] However, due to the high density of aggregates such as sand and stone, there is a large difference in density between them and other components in concrete, which makes it easy for aggregates to sink and water to rise during transportation, vibration and pumping. The phenomenon that the sand and stone are easy to block the pipeline during the pumping pro...

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Problems solved by technology

[0003] However, due to the high density of aggregates such as sand and stone, there is a large difference in density between them and other components in concrete, which makes it easy for aggregates to sink and water to rise during transportation, vibration and pumping. phenomenon, even sand and stones are easy to block the pipeline during the pumping process, and there is still room for improvement

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