Cracking resisting concrete

Abstract

The invention discloses cracking resisting concrete. The cracking resisting concrete comprises the following components in parts by mass: 230-420 parts of cement, 60-120 parts of mineral powder, 40-70 parts of pulverized fuel ash, 175-190 parts of water, 580-765 parts of sand, 1,080-1,090 parts of gravel and 3.6-6.96 parts of a high-performance polycarboxylate admixture. The cracking resisting concrete disclosed by the invention has high ultimate strain capacity and high cracking resistance and is low in production cost, less cement is used, and less energy is consumed.

Description

technical field [0001] The invention relates to an anti-crack concrete, which belongs to the technical field of concrete, and is suitable for any part of concrete engineering, especially for concrete engineering with high requirements for concrete anti-crack and anti-seepage, such as tunnels, ports, basement floors and side walls of industrial and civil construction, etc. Continuous moisturizing maintenance difficult project. Background technique [0002] At present, in many underground projects, especially large-volume concrete projects, concrete cracks are more common. In order to prevent concrete cracks, the technology of adding expansion agent and polypropylene fiber is generally used to achieve the effect, but adding the above materials will increase the cost of concrete ( Increase the cost by 35~50 yuan / m3), and it needs to be supplemented by manual addition, which increases the labor intensity and environmental pollution. If the automatic process is adopted, the prop...

AI Technical Summary

Problems solved by technology

[0002] At present, in many underground projects, especially large-volume concrete projects, concrete cracks are more common. In order to prevent concrete cracks, the technology of adding expansion agent and polypropylene fiber is generally used to achieve the effect, but adding the above materials will increase the cost of concrete ( Increase the cost by 35~50 yuan / m3), and it needs to be supplemented by manual addition, which increases the labor intensity and environmental pollution. If the automatic process is adopted, the proportion of concrete in this process is low compared with others, resulting in increased equipment investment and Device Idle Issues

Moreover, the maintenance requirements for the project after adding the expansion agent are also quite high. Once the maintenance is not in place, it will increase the probability of cracks and increase the construction cost.