High toughness cement-based material and preparation method thereof

Abstract

The invention discloses a high toughness cement-based material and a preparation method thereof. The high toughness cement-based material is prepared from the following raw materials in parts by weight: 10 to 20 parts of styrene-butadiene emulsion, 30 to 50 parts of portland cement, 15 to 25 parts of coal ash, 7 to 15 parts of composite reinforced fiber, 6 to 14 parts of silica fume, 4 to 10 partsof mica powder, 1 to 5 parts of dispersing agent, 2 to 5 parts of water reducing agent, 0.5 to 3.5 parts of thickening agent and 12 to 18 parts of water. According to the high toughness cement-basedmaterial disclosed by the invention, through compound mixing of the styrene-butadiene emulsion and the composite reinforced fiber, meanwhile, the flexibility of concrete matrix and the bonding strength of the composite reinforced fiber and concrete after concrete cracking are increased so that the purpose of reinforcing the toughness of the concrete is achieved, the styrene-butadiene emulsion canbe dehydration hardened into a three-dimensional continuous film-like structure in the concrete so that the concrete can show high tension, good plasticity and high impact toughness, and the compositereinforced fiber is tightly bonded with cement by the styrene-butadiene emulsion so as to improve the crack resistance of the material.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-toughness cement-based material and a preparation method thereof. Background technique [0002] Building materials are the basis of construction engineering, and concrete is the most widely used building material. Its main components include cement, admixtures and aggregates. It is hardened after adding water and mixing. It has the advantages of simple process and fire resistance. However, concrete has disadvantages such as low tensile strength, poor toughness, and difficulty in controlling the width of cracks after cracking. Therefore, in traditional reinforced concrete structures, engineering accidents often occur due to corrosion of steel bars caused by cracks. Concrete structure cracks directly affect the durability of the structure and the service life of the project, eventually leading to premature deterioration of the concrete structure or even complete l...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned analysis of the prior art, the present invention provides a high-toughness cement-based material and a preparation method thereof. The prepared cement-based material has good flexibility, crack resistance and bending deformation ability, and solves the problem of traditional concrete tensile strength. Disadvantages such as low strength, poor toughness and difficult to control crack width after cracking