Self-compacting high-performance concrete and preparation method thereof

Abstract

The invention discloses a self-compacting high-performance concrete and a preparation method thereof. The concrete is prepared from the following raw materials by weight: a gelling material, fine aggregate, coarse aggregate, water, polypropylene fiber, a nanometer photocatalysis material, an expanding agent and a high-efficiency water reducer. The preparation method comprises the following steps: step 1, preparation of the nanometer photocatalysis material: (1) with chitosan as a matrix, subjecting chitosan and chloropropylene oxide to cross-linking modification so as to obtain cross-linked chitosan and mixing the cross-linked chitosan with active carbon fiber so as to obtain a mixed loading material; (2) preparing nanometer titanium dioxide sol by using a sol-gel method; and (3) mixing the nanometer titanium dioxide sol with the loading material prepared in (1) and carrying out ultrasonic vibration so as to the nanometer photocatalysis material; and step 2, weighing the gelling material, fine aggregate and polypropylene fiber in a weight ratio, stirring the weighed materials in a forced stirrer for 40 s, then adding the coarse aggregate, water, the nanometer photocatalysis material, the expanding agent and the high-efficiency water reducer and continuing stirring for 90 s so as to obtain the self-compacting high-performance concrete.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a self-compacting high-performance concrete and a preparation method thereof. Background technique [0002] With the development of China today, the application of concrete has been popularized in many aspects. According to statistics, the annual concrete consumption in China is about 2 billion m 3 The popularization of concrete has brought a lot of convenience to people's life, but it has also brought pollution to the environment and other aspects. Therefore, the existing concrete technology can no longer meet the development of contemporary society, and the research of new concrete is imperative. Self-compacting concrete refers to the concrete that can flow and compact under its own gravity, and can completely fill the formwork even if there are dense steel bars, and at the same time obtain good homogeneity and do not require additional vibration. Self-compacting concrete has...

AI Technical Summary

Problems solved by technology

[0003] The existing self-compacting concrete technology is still unable to give full play to the advantages of self-compacting concrete, and further research is needed to develop concrete that is more in line with self-compacting performance

Although self-compacting concrete can reduce noise pollution, it still cannot solve other environmental pollution problems caused by concrete. In today's pursuit of harmonious development of economy and environment, how to minimize environmental pollution in the existing mature technology is also an important issue for us. important questions to consider