Additive for dry reactive powder concrete powder and usage thereof

Abstract

The invention relates to an additive for dry reactive powder concrete powder and usage thereof. In percentage by weight, the materials of the additive are as follows: 5 to 55 percent of superplasticizer powder; 2 to 15 percent of air-entraining agent powder; 1 to 20 percent of defoamer powder; and 30 to 70 percent of coal ash. The invention organically integrates inorganic materials and organic materials together, and solves the problem of compatibility between the additive and the inorganic materials as well as the organic materials by way of modification. All the main property indexes of reactive powder concrete coordinate with, constrain and affect one another. By means of the additive, various properties of the reactive powder concrete are modified, such as the air-entraining effect and the shrinkage-reducing effect, consequently, after the dry reactive powder concrete powder is mixed with water, all the components are added to one another and affect one another, and thereby the main property indexes of the reactive powder concrete can meet the requirements of construction and designs.

Description

Technical field [0001] The invention relates to an admixture added to active powder concrete and a method for using the special admixture. Background technique [0002] Reactive Powder Concrete, referred to as RPC, is a new type of cement-based composite material. This material was originally invented by the French company Bouygues in the 1990s. It is produced under specific process conditions and has ultra-high strength and excellent durability. It has broad application prospects in petroleum, nuclear power, municipal, marine and military installations. Foreign application projects include Sherbrooke in Quebec, Canada, the world's first pre-stressed reactive powder concrete structure pedestrian bridge, the Cattenom nuclear power plant in France, and an arched pedestrian bridge in Seoul, South Korea. my country is mainly used in high-speed passenger dedicated line sidewalk covers. , Baffles and some military installations, etc., have gradually increased in other fields in recent ...

AI Technical Summary

Problems solved by technology

[0011] The invention provides an active powder concrete dry powder admixture and its use method. It is necessary to solve the problem of poor adaptability between the admixture and inorganic cementitious materials such as cement when preparing the active powder concrete dry powder, and the low fluidity and low strength of the active powder concrete. , Conventional mixing process and equipment are difficult to cast into shape and other technical problems that affect the construction quality