A modified cement engineering material with waterproof and anti-crack performance

Abstract

The invention relates to the technical field of novel functional materials, and discloses a modified cement engineering material having waterproof and anti-cracking properties. The material is prepared from, by weight, 340-350 parts of cement, 15-18 parts of an ammonium dihydrogen phosphate solution, 7.5-8.0 parts of polyethylene glycol, 2.0-2.4 parts of a modifier, 0.45-0.50 part of magnesium sulfate, 0.35-0.38 part of an emulsifier, 0.25-0.30 part of a curing agent, 0.15-0.20 part of a defoamer and 200-210 parts of water. The modifier is added in a cement hydration reaction to achieve crosslinking and curing to form a film, a network structure is formed by utilizing the modifier, and gaps of cement particles are filled so that the prepared material has stable physical and chemical structures, improvement effects are not influenced by outer environment, a cement structure is more compact and crack formation is prevented. Compared with present cement products, the material is significantly improved in waterproof and corrosion resistant properties and obviously reduced in porosity.

Description

technical field [0001] The invention belongs to the technical field of new functional materials, and in particular relates to a modified cement engineering material with waterproof and anti-crack performance. Background technique [0002] In 1756, British engineer J. Smeaton discovered when studying the characteristics of some lime hardening in water: to obtain hydraulic lime, limestone containing clay must be used for firing; The ideal composition is composed of hydraulic lime and volcanic ash. This important discovery laid a theoretical foundation for the research and development of modern cement. [0003] Cement is a powdery hydraulic inorganic gelling material. After adding water and stirring, it becomes a slurry, which can be hardened in the air or better hardened in water, and can firmly bind sand, stone and other materials together. In the early years the mixture of lime and volcanic ash is very similar to lime pozzolanic cement, use it to glue concrete which made ...

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Problems solved by technology

[0004] As a representative of commonly used building materials, cement has good constructability and excellent compressive strength. However, as the requirements for engineering materials become higher and higher, the shortcomings of cement are enlarged, such as poor brittleness, high self-weight, and easy construction after construction. Cracking, poor elongation, poor durability, water resistance, weak corrosion resistance and other shortcomings limit the application of cement in engineering materials

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