Preparation method of high-strength lightweight aggregate concrete

Abstract

The invention provides a preparation method of a high-strength lightweight aggregate concrete. The preparation method comprises the following steps of 1, filling a storage part in a grinding device with the light aggregate, and then sealing the storage part to prevent dusts from overflowing; 2, crushing the large lightweight aggregate through cooperative use of a crushing part and a fitting assembly in the grinding device; 3, discharging and collecting the materials with qualified sizes in the storage part in a circulating mode; the grinding device comprises the storage part and the crushing part, the fitting assembly matched with the crushing part for use is arranged on the storage part, the storage part comprises a base plate and a fence, the fence is mounted at the upper end of the base plate and used for intercepting concrete materials, the fitting assembly comprises a pressing frame, the pressing frame penetrates through the fence, the distance between the end of the pressing frame and the inner side of the fence can be changed, the crushing part comprises an extrusion wheel, and the extrusion wheel is matched with the pressing frame.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing high-strength lightweight aggregate concrete. Background technique [0002] The preparation of concrete in the prior art is only prepared by mixing cement, sand, stones, water and water reducing agent. The advantages of such concrete are high compressive strength, easy material acquisition, easy molding, low price, and can be combined with steel It is made into various load-bearing components, but its Achilles heel is low tensile strength, high brittleness, easy cracking, and poor toughness, thereby reducing the bearing capacity of the concrete structure and shortening the service life, becoming a hidden danger of various disasters. [0003] The existing application number is 201610098328.0 A preparation method for ultra-high pumping ultra-ultra-high-strength steel fiber concrete. This invention provides a preparation method for ultra...

AI Technical Summary

Problems solved by technology

[0002] The preparation of concrete in the prior art is only prepared by mixing cement, sand, stones, water and water reducing agent. The advantages of such concrete are high compressive strength, easy material acquisition, easy molding, low price, and can be combined with steel It is made into various load-bearing components, but its Achilles' heel is low tensile strength, high brittleness, easy cracking, and poor toughness, thereby reducing the bearing capacity of the concrete structure and shortening the service life, becoming a hidden danger of various disasters.

[0003] The existing application number is 201610098328.0 A preparation method for ultra-high pumping ultra-ultra-high-strength steel fiber concrete. This invention provides a preparation method for ultra-high pumping ultra-ultra-high-strength steel fiber concrete. The method changes the proportion of cementitious materials, The feeding sequence is to prepare ultra-high pumping ultra-high-strength steel fiber concrete with C150 strength grade, which can be prepared by conventional production technology of mixing station, which solves the problem that conventional technology cannot produce concrete with C150 and above strength grade. This invention adopts commonly used Portland cement and coarse and fine aggregates are prepared under the action of "double mixing" of polycarboxylate high-efficiency water reducer and ultrafine mineral admixtures, by reducing the water-binder ratio and dense reinforcement, and the prepared concrete Good working performance, expansion degree 670-700mm, basically no loss in 2 hours; low viscosity, rewinding time 3.2-4.2s; 28d compressive strength reaches C150 strength level, which can meet the requirements of pumping construction for super high-rise buildings of 600m and above; but This invention is not convenient for crushing bulky light aggregates

Images