Concrete and preparation method thereof

Abstract

The invention discloses concrete and a preparation method thereof, which relates to the field of building materials. The concrete is prepared from the following raw materials in parts by weight: 68 to78 parts of cement, 172 to 189 parts of gravels, 130 to 140 parts of sand, 10 to 13 parts of coal ash, 1.4 to 3.3 parts of fibers, 0.5 to 1.8 parts of silane waterproof agent, 1.3 to 2.8 parts of water reducing agent, 0.7 to 2.2 parts of expansion agent and 176 to 183 parts of water. The concrete has the advantages of good waterproof effect and good durability. The preparation method comprises the following steps: weighing all components according to a set ratio, uniformly mixing cement, gravels, sand, coal ash and fibers in a drying manner to obtain a first mixture; uniformly mixing silane waterproof agent, water reducing agent, expansion agent and water to obtain a second mixture; and uniformly stirring the first mixture and the second mixture to obtain the concrete. The preparation method of the invention has the advantages of uniformity in concrete mixing, simple preparation steps and easy implementation.

Description

technical field [0001] The invention relates to the technical field of building materials, and more particularly, to a concrete and a preparation method thereof. Background technique [0002] Concrete is one of the most important civil engineering materials in contemporary times. It is made up of cementitious materials, granular aggregates (also called aggregates), water, and admixtures and admixtures added when necessary in a certain proportion. A kind of artificial stone formed by stirring, compacting, curing and hardening. Concrete has the characteristics of abundant raw materials, low price and simple production process, so the amount of concrete is increasing. [0003] However, the concrete in the prior art does not have a particularly good waterproof effect, and such phenomena are often encountered in daily life, such as water seepage and water leakage on the roof, water seepage and water leakage from the windows, and water seepage from the balcony wall. It is your o...

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Problems solved by technology

[0003] However, the concrete in the prior art does not have a particularly good waterproof effect. Such phenomena are often encountered in daily life, such as water seepage and water leakage from the roof, water seepage from the windows, and water seepage from the balcony wall. It belongs to one's own home, and it is often not handled well, and it will also affect the relationship between neighbors

Moreover, when water enters the main structure of the building, it is easy to cause harm to the cement, steel bars and wood in the reinforced concrete, which greatly reduces the service life of the building.

[0004] The existing waterproof materials on the market include: A. Polyurethane: oil-based materials, which have the best performance in the current waterproof coatings, but the environmental performance is relatively poor and the smell is very smelly; B. Acrylic: water-based materials, which have better performance. But the price is expensive, and it is not suitable for the humid weather in the south; C, JS polymers: water-based materials, adding cement and other inorganic materials in use, can be bonded to the cement base surface, but its waterproof effect is not ideal; D, Mortar: water-based material, which can be bonded to the cement base, but its service life is short, and it will take time, effort and money to replace it

[0005] The above four types have their own advantages and disadvantages, but the common disadvantage is that they are heavy in taste, and they are all coatings, which cannot solve the waterproof problem from the performance of concrete itself.

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