Concrete auxiliary material

Abstract

The special-purpose auxiliary material for concrete is formed from (by weight portion) 65-75 portions of mixed ash, 6-16 portions of slag powder, 3-7 portions of limestone powder, 2-6 portions of gypsum powder, 1-3 portions of lithium slag powder, 1-3 portions of rare earth micropowder and 4-8 portions of wollastonite powder. It is made up by adoting industrial waste materials, can be greatly substituted for cement, and the concrete prepared with it possesses high strnegth, good impervious property and frost resisting property, and its carbonization resistance can attain that the carbonization depth ratio is less than 95%, and its cost is low.

Description

technical field [0001] The invention relates to building materials and is a special auxiliary material for concrete. Background technique [0002] Most of the auxiliary materials currently used in concrete are single components, such as fly ash, silica fume or ground slag powder. Their shortcomings are: the amount of primary ash of fly ash is small, and the application is limited, while the third-grade ash is relatively thick, and the water consumption is large under the same slump, and the early strength is low; the output of silica fume is small, and the price is low. Expensive, which greatly increases the cost of concrete; the energy consumption of grinding fine slag powder is high, and the difficulty is high, the production cost is high, and the application of the project is narrow. Adopt these single auxiliary materials to prepare concrete, all can't make concrete reach higher performance. Contents of the invention [0003] The purpose of the present invention is to...