A kind of active powder concrete mixed with fly ash and its preparation method

Abstract

The invention discloses active powder concrete doped with coal ash and a preparation method of the active powder concrete. The active powder concrete doped with the coal ash is prepared from the following materials in parts by weight: 1 part of cement, 1.1 parts of quartz sand, 0.21 to 0.28 part of silica fume, 0.07 to 0.14 part of coal ash, 0.1 part of steel fibers, 0.1 part of small components, 0.2 part of water and 0.015 part of water reducer; and the active powder concrete doped with the coal ash is prepared by virtue of stirring, vibrating molding, mold stripping and high-temperature maintenance. The active powder concrete has the characteristics that the industrial waste slag powder is doped as an active component, and the novel active powder concrete is prepared by virtue of high-temperature maintenance, has the advantages of high strength, good mixability, low cost, environmental friendliness, simple preparation method and the like, is suitable for being popularized and used in real engineering, and conforms to the environment-friendly sustainable development strategy concept of China.

Description

technical field

[0001] The invention relates to the technical field of building materials, in particular to an active powder concrete mixed with fly ash and a preparation method thereof. Background technique

[0002] Reactive powder concrete is an ultra-high performance concrete with high strength, high toughness, high durability and low porosity. The configuration principle is to reduce the internal defects (micro-cracks and pores) of the material to a minimum by removing coarse aggregates, increasing the activity and fineness of the components, so as to obtain high mechanical properties and high durability. Its basic composition materials are: cement, fine quartz sand, ground quartz powder, silica fume, high-efficiency water reducer, steel fiber, etc. Due to the high cost of some components, the popularization and application of reactive powder concrete in practical engineering is restricted to a certain extent. On the other hand, fly ash and other slags are one of the i...