Dry powder of active powder concrete and use method of dry powder

Abstract

The invention relates to dry powder of active powder concrete and a use method of the dry powder. The dry powder comprises the following components by weight percent: 25%-55% of concrete, 5%-20% of blending stock, 30%-60% of fine aggregate, 5%-20% of micro powder, 2-5% of super plasticizing agent powder, 1-3% of air entraining agent powder, 0.2-1% of defoamer powder, and 0%-25% of fibers. According to the invention, through industrial production, water, of which the weight is 5%-10% of the weight of the dry powder, is added into the products on site, a conventional stirring technology and equipment are used for uniformly stirring, and a mixture meets a certain fluidity of construction performance and is used for easily preparing an active powder concrete prefabricated part or meets the requirement of cast in situ. The dry powder of active powder concrete and the use method of the dry powder have the advantages of stable and reliable quality, small air-entraining volume, excellent homogeneity and convenience in construction, can be widely applied to the engineering fields, such as petroleum, railway, nuclear power, municipal administration, ocean, military facilities and the like, and have excellent economic benefits.

Description

technical field [0001] The invention relates to a dry powder material of active powder concrete and an application method thereof. Background technique [0002] Reactive Powder Concrete, RPC for short, is a new type of cement-based composite material. This material was first invented by the French Bouygues company in the 1990s. It was 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 facilities and other projects. Foreign application projects mainly include Sherbrooke in Quebec, Canada, the world's first prestressed active powder concrete structure pedestrian bridge, Cattenom nuclear power plant in France, an arched pedestrian bridge in Seoul, South Korea, etc. In my country, it is mainly used in high-speed rail passenger dedicated line sidewalk cover , baffles and some military facilities, etc., have gradually increased in recent year...

AI Technical Summary

Problems solved by technology

[0012] The invention provides an active powder concrete dry powder and its use method, which solves the technical problems of inaccurate on-site proportioning of active powder concrete multi-components, difficult quality control, poor homogeneity, and affecting engineering application and construction quality. ; It is also necessary to solve the technical problems of low fluidity of active powder concrete mixture, difficulty in on-site preparation and pouring, and low natural curing strength