A zero-constraint shrinkage resin concrete capable of floating on water and its preparation method

Abstract

The invention provides a zero-constraint shrinkage resin-resistant concrete that can float on water and a preparation method, comprising: 22.0% to 32.0% of a resin system (including a curing agent, an accelerator and a diluent), and 18.0% to 18.0% of a lightweight porous coarse aggregate. 30.0%, lightweight porous fine aggregate 10.0%-20.0%, fine sand 15.0%-30.0%, fly ash 2.0%-6.0%, waste rubber particles 2.0%-12.0%, waste rubber powder 2.0%-5.0%, 3.0% to 7.0% of hollow material and 0.2 to 2.5% of chopped fiber. The present invention can reduce the early shrinkage of concrete by adding waste rubber particles and waste rubber powder, lightweight aggregate and hollow materials; prolong the curing time of resin in resin concrete, increase the stress relaxation of resin concrete, and greatly reduce the stress of concrete under constraints. The shrinkage strain and the non-load cracks of the resin concrete are eliminated, and the anti-vibration and energy absorption characteristics of the resin concrete are also improved, and the volume instability caused by the early curing shrinkage of the resin concrete is solved. Using a variety of lightweight materials, the resin concrete can float on the water (apparent density <930kg / m3).

Description

technical field [0001] The invention relates to a zero-constraint shrinkage resin-resistant concrete that can float on water and a preparation method thereof, and belongs to the related technical field of concrete. Background technique [0002] In some areas where the environment is relatively harsh and light weight concrete is required at the same time, such as some special equipment, ships and offshore platforms, etc.; in harsh environments such as chemical pools, electrolytic pools, and polluted waters that are also severely corrosive, it is often required. Carry out surface work, and corrosive substances will cause serious corrosion to the work platform, which will easily lead to the problem that it cannot continue to be used due to corrosion. Cement concrete can no longer meet the needs of the project. Resin concrete refers to concrete made of resin as a cementitious material. It is a new type of building material that is lighter in weight and higher in corrosion resist...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a zero-constraint shrinkage resin-resistant concrete that can float on water and its preparation method, to solve the problems mentioned in the above background technology in harsh environments such as chemical pools and electrolytic pools with high temperature and severe corrosion For surface work, corrosive substances will cause serious corrosion to the work platform. At the same time, there is early cracking in cement concrete, which reduces the bearing capacity of the structure, seriously affects the durability and life of the components, and greatly improves the maintenance of the structure. cost

The cementitious material of resin concrete——resin, is an organic polymer material. After the reaction forms a chain and solidifies, the volume shrinkage of resin concrete will be more serious than that of cement concrete. This feature will seriously restrict the application and development of resin concrete. And the existing resin concrete has the problems of high density, poor high temperature resistance, poor vibration resistance and energy absorption effect