High damping vibration attenuation cement concrete

A cement concrete and high damping technology, which is applied in the field of composite materials for concrete structures, can solve the problems of insufficient foundation rigidity and insufficient elasticity, and achieve the effect of reducing project cost

Inactive Publication Date: 2008-12-31
上海宝冶工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 proble

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix the components uniformly according to the following proportions: 15% cement, 26% medium sand, 47% crushed stone, 7% water, 0.02% water reducer, 0.006% defoamer, and then add 5% polymer additive. A high-damping vibration-reducing cement concrete of the present invention is prepared under the condition that the ambient temperature is not lower than 5° C., and its damping ratio is measured to be 1.8.

Embodiment 2

[0020] Mix the components uniformly according to the following proportions: 18% cement, 25% medium sand, 45% crushed stone, 4.5% water, 0.03% water reducer, 0.0075% defoamer, and then add 7.5% polymer additives. A high-damping vibration-reducing cement concrete of the present invention is prepared under the condition that the ambient temperature is not lower than 5° C., and its damping ratio is measured to be 2.0.

Embodiment 3

[0022] Mix the components uniformly according to the following proportions: 16% cement, 28% medium sand, 45% crushed stone, 5% water, 0.03% water reducer, 0.006% defoamer, and then add 5% polymer additive. A high-damping vibration-reducing cement concrete of the present invention is prepared under the condition that the ambient temperature is not lower than 5° C., and its damping ratio is measured to be 1.9.

[0023] The high-damping vibration-reducing cement concrete prepared by the present invention was applied to the pouring of the storage ring support pier of the Shanghai Light Source Project three times, and the measured damping ratio was ≥1.8, and the static elastic modulus was ≥2.2×10 4 Mpa, which improves the vibration damping performance of the system and meets the design parameter requirements.

[0024] In the manufacturing process of the support pier of the storage ring of the Shanghai Light Source Project, a simulation test of ordinary concrete and vibration-dampin...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/04C04B14/02C04B24/24
CPCC04B28/04C04B2111/2046
Inventor 于贺包朝亮王秋蓉张立华徐晨阳付强
Owner 上海宝冶工程技术有限公司
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