Formula of concrete creak self-repair material and preparation technology

Abstract

The invention relates to a formula for a concrete crack self-repairing material and a process for preparing the concrete crack self-repairing material. The material comprises the following components in weight percentage: 62 to 77 percent of Portland cement, 0.2 to 1.0 percent of sodium citrate, 3.0 to 8.0 percent of bilinurine, 1 to 4 percent of sodium silicate, 1.0 to 3.0 percent of calcium oxide and 22 to 35 percent of quartz sand with the grain diameter of between 80 and 120 meshes; the preparation process comprises the following steps: the 62 to 77 percent of Portland cement and the 22 to 35 percent of quartz sand with a grain diameter of between 80 and 120 meshes are mixed in a mixer, during which, the 0.2 to 1.0 percent of sodium citrate, the 3.0 to 8.0 percent of bilinurine, the 1to 4 percent of sodium silicate and the 1.0 to 3.0 percent of calcium oxide are added and mixed for 3 to 5 minutes, and the mixture is subjected to material discharging and sealing storage. The material has the functions of compactness, penetration resistance, freeze resistance and chemical corrosion resistance, and can resist the strong water pressure and the invasion of harmful matters for a long time and has the same service life as the concrete; moreover, the material is not swelled to damage the concrete, and is non-toxic, harmless and environment friendly.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a formula and a preparation process of a concrete crack self-repairing material. technical background [0002] Concrete permeability is the most critical factor affecting the durability of concrete. Cracks lead to a significant increase in the permeability of the concrete. Therefore, the study of concrete crack self-healing materials is an important way to enhance and improve the impermeability of concrete and improve the durability of concrete. At present, people mostly take remedial measures such as grouting and plugging to repair macroscopic cracks in concrete, but there is nothing they can do about microscopic cracks in concrete and their prevention. Traditional repair materials use the method of filling-reaction-coagulation, which has no secondary activity, and it is basically impossible to repair the micro-cracks inside the concrete, and these materials will cr...

AI Technical Summary

Problems solved by technology

Traditional repair materials use the method of filling-reaction-coagulation, which has no secondary activity, and it is basically impossible to repair the micro-cracks inside the concrete, and these materials will crack again in the repaired concrete

Although cement-based permeable crystalline waterproof materials can solve concrete cracks to a certain extent, they do not have permanent self-healing ability for concrete micro-cracks and macro-cracks