Foamed plastic type concrete joint filling board

A foamed plastic and concrete technology, applied in the field of plastic-type concrete caulking boards, can solve problems such as damage, consumption of large and high-quality wood, destruction of ecological resources, etc., and achieve the effect of adapting to temperature changes

Inactive Publication Date: 2008-05-28
HEILONGJIANG PROVINCIAL HYDRAULIC RES INST
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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 solve the poor construction effect of currently using asphalt-impregnated fir boards as concrete caulking boards, asphalt boiling pollutes the environment and threatens the health of construction workers, and the asphalt is prone to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0008] Specific Embodiment 1: In this embodiment, the foamed plastic type concrete caulking board is made by mixing 50-100 parts of matrix resin, 0.5-30 parts of foaming agent and 0.1-5 parts of cross-linking agent in parts by weight ; Wherein the base resin comprises 70-100 parts of low-density polyethylene according to the ratio of parts by mass.

[0009] Low-density polyethylene (LDPE) density in this embodiment is 0.930g / cm 3 , The resin melt index ranges from 0.25 to 2.1 g / 10 minutes.

[0010] In this embodiment, the foaming ratio of the foamed plastic concrete caulking board is 2 to 15 times, and the density is 60 to 400 kg / m 3 , Placed in an environment of 80°C for 4 hours, it will not be sticky, and placed in an environment of -80°C for 4 hours, it will not be hard and brittle. The size and thickness of the foamed plastic concrete caulking plate in this embodiment can be selected according to actual needs. The foamed plastic concrete caulking board of this embodimen...

specific Embodiment approach 2

[0012] Specific embodiment two: The difference between this embodiment and specific embodiment one is that the foamed plastic type concrete caulking board also includes 0.1 to 40 parts of modifiers and 0.1 to 30 parts of foaming aids in parts by weight. agent, 0.1-10 parts of liquid additives, 0.1-5 parts of anti-aging agent, 0.1-3 parts of nucleating agent, 0.5-8 parts of external lubricant, 0.1-2 parts of antioxidant and / or 0.1-3 parts of 1 part UV absorber. Other steps and parameters are the same as those in Embodiment 1.

[0013] In this embodiment, the external lubricant is a PVC external lubricant.

[0014] After the present embodiment adds the ultraviolet absorber, through 500~800h ultraviolet radiation intensity maintenance rate > 90% (existing foam material, as polystyrene foam, polyurethane foam or polyvinyl chloride foam after the ultraviolet radiation 144h intensity retention rate is lower than 85%).

specific Embodiment approach 3

[0015] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the matrix resin also includes 10-30 parts of high-density polyethylene, 10-30 parts of ethylene-alpha olefin copolymer, 10 ~30 parts of ethylene-vinyl acetate copolymer, 10~30 parts of linear low density polyethylene, 10~30 parts of binary ethylene-propylene copolymer, 10~30 parts of terpolymer, 10~30 parts 10-30 parts of natural rubber, 10-30 parts of styrene-butadiene rubber, 10-30 parts of butadiene rubber, 10-30 parts of high styrene rubber or 10-30 parts of nitrile rubber. Other steps and parameters are the same as those in Embodiment 1.

[0016] In this embodiment, the molecular weight of high-density polyethylene (HDPE) is 40,000 to 300,000; the density of ethylene-vinyl acetate copolymer (EVA) is 0.935g / cm 3 , the resin melt index ranges from 1.8 to 2.0 g / 10 minutes, and the content of vinyl acetate (VA) is 5% to 40%; the ethylene-α olefin copolymer contains 3 to ...

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Abstract

The invention belongs to a foamed plastic type concrete caulking plate, which relates to a plastic type concrete caulking plate. The invention overcomes the defects existing in the current asphalt immersed fir plate used as concrete caulking plate that the construction effect is poor, the decoction of asphalt pollutes environment and threatens the health of workers, the asphalt is easy to lose efficacy to result in the erosion and damage of the concrete caulking plate, furthermore, adopting fir as concrete caulking plate needs to consume large amount of high quality wood, which destroys the ecological resources. The foamed plastic type concrete caulking plate comprises in weight proportion 50-100 portions of matrix resin, 0.5-30 portions of vesicant, 0.5-5 portions of crosslinking agent which are mixed to form the foamed plastic type concrete caulking plate. The foamed plastic type concrete caulking plate belongs to medium and high foamed products with 2-15 times foaming rate and has the advantages of water resistance, humidity-resistance, low temperature resistance, adaptation to temperature change and corrosion resistance.

Description

technical field [0001] The invention relates to a plastic type concrete joint filling board. Background technique [0002] In various concrete structural projects, due to the stress existing in the concrete, the concrete often leads to cracking; in order to transmit and disperse the stress inside the mass concrete, permanent deformation joints are often reserved at certain intervals, including expansion joints, settlement joints, and shockproof joints Wait. [0003] Currently, asphalt-impregnated fir boards are used as concrete caulking boards. In summer, the asphalt tends to flow when heated, and in winter, the asphalt becomes hard and brittle. Moreover, the boiling of asphalt pollutes the environment and threatens the health of construction workers; in addition, the asphalt is prone to failure, causing termites to eat wood , the water absorption rate of the fir board increases, the deformation rate increases significantly, and the recovery ability of the wood under compre...

Claims

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Application Information

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IPC IPC(8): C04B26/02
Inventor 李亚芬刘桂英张滨徐昭巍张岩岳为群陈金波
Owner HEILONGJIANG PROVINCIAL HYDRAULIC RES INST
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