Concrete and cracking-resistant pouring method by adopting concrete

Abstract

The invention discloses concrete, which comprises the following components: 270-290kg of cement, 178-205kg of water, 528-560kg of fine aggregate, 1200-1350kg of coarse aggregate, 3.5-5.6kg of pumping aid, 27-32kg of swelling agent and 101-116kg of coal ash. The invention also discloses a cracking-resistant pouring method by adopting the concrete disclosed by the invention. The cracking-resistant pouring method comprises the following steps: S1: adding ice blocks into the concrete for stirring, wherein the addition of the ice blocks is 35-51kg / m<3>; S2: continuously pumping evenly stirred concrete into a die cavity, and evenly vibrating until the whole die cavity is vibrated. The concrete disclosed by the invention can be suitable for large-volume concrete pouring, heat of hydration is lowered, and the heat retaining property of the concrete is improved. If the cracking-resistant pouring method disclosed by the invention is adopted, the temperature of the concrete can be evenly distributed, the heat retaining property of the concrete is good, the cooling speed of the concrete is low, the temperature difference of each layer of the concrete is reduced, the heat expansion and cold contraction of each layer of the concrete tends to be synchronous, and the interior of the concrete can be prevented from cracking due to the temperature difference.

Description

technical field [0001] The invention relates to a concrete and a concrete pouring method. Background technique [0002] Concrete, referred to as concrete for short, refers to the general designation of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Concrete is generally made of cement as the cementitious material, sand and gravel as the aggregate, and mixed with water. After the concrete is poured, due to the heat of hydration of the cement, a large amount of heat will be released inside the concrete, causing the internal temperature of the concrete to be too high, which is much higher than the external ambient temperature. Cracking during the solidification process seriously affects the strength of the concrete after molding. Especially for mass concrete (mass concrete with a pouring thickness of more than 1m), it is easier to crack due to excessive temperature difference. [0003] In the prior art, in order to so...

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Problems solved by technology

This will lead to interlayer seams in the concrete in the height direction, the overall continuity of the concrete will decrease, and slippage between concrete layers will easily occur; in addition, such a pouring method needs to wait for the concrete to solidify several times, and the pouring period is long, which is not conducive to Increase productivity

[0004] In the prior art, water pipes are also used in the concrete (cold water is continuously poured into the water pipes) to cool down the interior of the concrete to avoid excessive temperature differences. Although it has a certain inhibitory effect on concrete cracking, the water pipes often fail because they cannot withstand However, because people cannot see the inside of the concrete, after the water pipes are crushed, cold water continues to flow in, causing water seepage inside the concrete, dilution of the concrete, and even segregation of the concrete, resulting in a decrease in the strength of the concrete

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