High damping vibration attenuation cement concrete

Abstract

The invention relates to a high-damping cement concrete, comprising ordinary Portland cement, sand, water, polymer additive and additional water reducer and defoamer; the high-damping cement concrete is characterized in that the components and the weight proportions (in percentage terms) are as follows: 15%-18% of Portland cement, 25%-35% of medium sand, 45%-50% of gravel, 4.5%-8% of water, 4.5%-7.5 % of polymer additive, 0.02%-0.03% of water reducer, and 0.006-0.0075% of defoamer. The gravel size ranges from 5mm to 31.5mm. The polymer additive can be styrene-butadiene latex, acrylic copolymer emulsion or dispersible emulsion powder. By adopting the styrene-butadiene latex, acrylic copolymer emulsion or dispersible emulsion powder and other polymer additives as the modifier in the viscidity, the structural viscidity and inner friction performance of concrete material, the high-damping cement concrete disclosed in the invention achieves the same vibration damping characteristics as the existing polymer concrete and does not change the other properties of concrete, so that the project cost is greatly reduced and the high-damping cement concrete can be applied to engineering projects having system damping demand.

Description

technical field [0001] The invention relates to a high-damping vibration-reducing cement concrete, which belongs to composite materials for concrete structures. Background technique [0002] As a structural material, concrete has always been the main material used in various building foundations. Because ordinary concrete foundations have sufficient rigidity and insufficient elasticity, polymer concrete (or resin concrete) must be used in the foundation pouring of some concrete structures that require vibration-reducing effects. The damping of a material is the ability to convert mechanical energy into heat energy consumed by internal factors such as the material structure. It is related to the viscosity of the material itself, structural viscosity, internal friction loss, etc. The damping performance is an important indicator to measure the vibration reduction performance of the material. The material The higher the damping, the better the vibration damping performance. A...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-damping and vibration-reducing cement concrete, which not only solves the problem of excess rigidity but insufficient elasticity of ordinary concrete foundations, but also has moderate cost and simple construction performance