Lightweight crack-resistant concrete and its preparation method

Abstract

The invention relates to a lightweight crack-resistant concrete and a preparation method thereof. The concrete is composed of 22.51% of cement, 42.997% of pottery sand, 16.43% of fly ash, 0.097% of durafiber, 0.083% of foaming agent and 0.26% of water reducer , 0.056% air-entraining agent and 17.567% water. When preparing, first put the foaming agent into the mixer and mix it with water to produce a foaming agent; then add the water reducing agent into the mixer and stir well; finally, extract the cement, ceramic sand, fly ash and Dura fiber in the hopper Put the material into the pan, put it into the blender, and stir. In this way, the prepared concrete is light in weight, environmentally friendly and energy-saving, high in compressive strength, and good in thermal insulation performance. The wall structure cast using it is well formed, and the surface verticality and flatness are high, thereby eliminating the need for internal and external wall plastering and other processes. , avoiding common quality problems such as empty drums, cracks, and leakage caused by plastering.

Description

technical field [0001] The invention belongs to the technical field of concrete, in particular to lightweight crack-resistant concrete and a preparation method thereof. Background technique [0002] In order to actively respond to the call of "promoting the healthy development of urbanization and vigorously promoting the construction of ecological civilization" put forward by the report of the 18th National Congress of the Communist Party of China, and to fully implement the various principles of the "industrialization" development of new construction projects promulgated by the Ministry of Construction, According to the basic national policy of saving resources and protecting the environment, vigorously develop low-carbon, energy-saving, and environmentally-friendly buildings, and change the traditional extensive and labor-intensive production models of bricks, tiles, ash, sand, and stones. [0003] At present, the industrialization level of housing construction in advanced...

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Problems solved by technology

[0004] In addition, conventional concrete currently on the market is heavy, and its compressive strength, tensile strength, and flexural strength are all very low. Therefore, when using it to build walls, only brick-laying structures can be used, which means that there are technical problems mentioned above. For this reason, foam lightweight concrete has appeared on the market, and adopt this foam lightweight concrete to pour the wall structure, but compressive strength, tensile strength and flexural strength are still low, and the molding surface is rough and needs secondary plastering , the cost is relatively high

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