Self-made low-defect ultra-high-strength lightweight aggregate, preparation method and uses thereof

Abstract

The invention relates to the technical field of building materials, particularly to a self-made low-defect ultra-high-strength lightweight aggregate, which is prepared from the following raw materialsby weight: 700-770 parts of cement, 90-110 parts of fly ash, 210-230 of silica fume, 90-135 parts of hollow glass micro-beads, 4-8 parts of polyvinyl alcohol fiber, 360-520 parts of quartz sand, 1.8-2.2 parts of an active activator, 28-35 parts of a water reducing agent, 0.06-0.08 part of an antifoaming agent, and 135-155 parts of water. According to the present invention, the self-made low-defect ultra-high-strength lightweight aggregate based on the technical scheme has obvious advantages in the preparation of lightweight high-strength concrete, breaks through the strength problem of lightweight concrete represented by ceramsite concrete and solves the problem of poor coordination between aggregate and matrix in concrete, and further has advantages of good feasibility and broad application prospect.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a self-made low-defect ultra-high-strength lightweight aggregate and its preparation method and application. Background technique [0002] In the current rapid development of the construction industry, as building heights and structural spans continue to increase, concrete is required to have high strength and low density, while ordinary concrete is heavy and accounts for a large proportion of the total load of buildings. Significant. At present, the use of ceramsite ceramsite as lightweight aggregate is the main measure to reduce the density of concrete, and ceramsite concrete is economical and is the most widely used lightweight high-strength concrete; however, ceramsite lightweight high-strength concrete has certain limitations . On the one hand, the cylinder compressive strength of ceramsite is limited, usually 4~10MPa, and there are harmful pore defects inside t...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a self-made low-defect ultra-high-strength lightweight aggregate and its preparation method and application. 3~8 times the strength, it has obvious advantages in the preparation of lightweight high-strength concrete, breaking through the strength bottleneck of lightweight concrete represented by ceramsite concrete, and solving the problem of poor coordination between aggregate and matrix in concrete, feasible Good performance, broad application prospects

Images