High-ductility cement-based material and preparation method thereof

Abstract

The invention relates to the technical field of a cement-based material, in particular to a high-ductility cement-based material. The high-ductility cement-based material is prepared from silicate cement, coal ash, quartz sand, water, water reducing agent, thickening agent, PVA fibers and concrete expanding agent, and the weight percent of each component in the material to the silicate cement is as follows: 1.0 to 2.5 percent of coal ash, 0.8 to 1.2 percent of quartz sand, 0.8 to 0.85 percent of water, 0.005 to 0.05 percent of water reducing agent, 0.001 to 0.003 percent of thickening agent, 0.08 to 0.12 percent of concrete expanding agent, and the total volume ratio of the PVA fibers is 0.005 to 0.025 percent. The high-ductility cement-based material has good mobility, can basically reacha self-flatting agent, and is excellent in mechanical properties, good in anti-freeze performance, good after being circulated for 300 times in a thawing manner, and applicable to a cold district; the material is good in waterproofness, the seepage resistance grade of the material is 12, and the 28-day carbonization test depth is 12 mm; impact resistance and shock resistance are good; and the high-ductility cement-based material is resistant to the radiation of ultraviolet rays, and free from aging and failure at a low temperature.

Description

technical field [0001] The invention relates to the technical field of cement-based materials, in particular to a high-ductility cement-based material and a preparation method thereof. Background technique [0002] Cement-based material is a composite material composed of Portland cement as a matrix, fiber as a reinforcement, fillers, chemical additives and water through a composite process. It has a wide range of uses. Cement-based materials have unique characteristics. Such as low cost, high pressure resistance, strong durability, etc., in today's building materials industry, cement-based materials have always been one of the most widely used building materials. Nevertheless, cement is still a single-function, self-heavy brittle material, which is prone to a large number of cracks in structural engineering, and can no longer meet the sustainable and high-performance requirements of large bridges, dams, nuclear reactor peripherals, etc. . In recent decades, in the field o...

AI Technical Summary

Problems solved by technology

However, the performance of existing cement-based materials in the market is not good enough