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Concrete used for bridges

A concrete and bridge technology, applied in the field of concrete, can solve the problems of concrete strength loss, impact on durability, high cost of concrete, etc., and achieve the effect of meeting the needs of use, low cost, crack resistance and impermeability.

Inactive Publication Date: 2017-03-22
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the concrete used for bridges in the prior art has high cost and poor impermeability, which easily causes loss of concrete strength and affects its durability, and provides a reasonable proportion and low cost. Concrete for bridges with significantly improved crack resistance and impermeability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A concrete for bridges made of the following components by weight: 480kg cement, 700kg fine sand with a fineness modulus of 2.3, 1000kg gravel, 65kg fly ash, 85kg methyl cellulose ether, 11kg poly Carboxylic acid high-performance water reducer, 20kg tea saponin, 38kg modified bamboo fiber, 180kg water, of which the crushed stone adopts two gradations of 5mm and 10mm, and the gradation ratio is 30:70;

[0016] Modified bamboo fiber is prepared by the following method: adding bamboo fiber with a length of 10mm and a diameter of 0.03mm to chlorosulfonic acid, heating to 80°C to swell for 1 hour, cooling, filtering, washing the filtrate with water until the pH is neutral, and drying in vacuum , and then added to the sizing agent for soaking for 30 minutes and then dried at 95°C to obtain the modified bamboo fiber. The sizing agent is made of the following components by mass percentage: 40% polytetrafluoroethylene dispersion emulsion, 0.1% quaternary ammonium salt , 0.3% pol...

Embodiment 2

[0018] A concrete for bridges made of the following components by weight: 500kg cement, 710kg fine sand with a fineness modulus of 3.0, 1050kg gravel, 70kg fly ash, 90kg methyl cellulose ether, 13kg poly Carboxylic acid high-performance water reducer, 25kg tea saponin, 50kg modified bamboo fiber, 200kg water, of which the gravel adopts two gradations of 10mm and 20mm, and the gradation ratio is 30:70;

[0019] Modified bamboo fiber is prepared by the following method: adding bamboo fiber with a length of 15mm and a diameter of 0.05mm to chlorosulfonic acid, heating to 100°C to swell for 3 hours, cooling, filtering, washing the filtrate with water until the pH is neutral, and drying in vacuum , and then added to the sizing agent for soaking for 60 minutes and dried at 105°C to obtain modified bamboo fiber. The sizing agent is made of the following components by mass percentage: 50% polytetrafluoroethylene dispersion emulsion, 0.2% quaternary ammonium salt , 0.5% polyoxyethylene...

Embodiment 3

[0021] A concrete for bridges made of the following components by weight: 490kg cement, 705kg fine sand with a fineness modulus of 2.8, 1020kg crushed stone, 68kg fly ash, 87kg methyl cellulose ether, 12kg poly Carboxylic acid high-performance superplasticizer, 22kg tea saponin, 40kg modified bamboo fiber, 185kg water, among which the crushed stone adopts two gradations of 6mm and 12mm, and the gradation ratio is 30:70;

[0022] Modified bamboo fiber is prepared by the following method: adding bamboo fiber with a length of 12mm and a diameter of 0.04mm to chlorosulfonic acid, heating to 90°C to swell for 2 hours, cooling, filtering, washing the filtrate with water until the pH is neutral, and drying in vacuum , and then added to the sizing agent for soaking for 40 minutes and dried at 98°C to obtain the modified bamboo fiber. The sizing agent is made of the following components by mass percentage: 45% polytetrafluoroethylene dispersion emulsion, 0.15% quaternary ammonium salt ...

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Abstract

The invention discloses a concrete used for a bridge. The concrete used for the bridge is prepared from, by weight, 480-500 parts of cement, 700-710 parts of fine sand, 1000-1050 parts of macadam, 65-70 parts of flyash, 85-90 parts of methyl cellulose ether, 11-13 parts of polycarboxylic acid high-performance water reducing agent, 20-25 parts of tea saponin, 38-50 parts of modified bamboo fiber and 180-200 parts of water. According to the concrete used for the bridge, at the time of giving considerations to both the quality and the matching economy, optimization and adjustment are conducted on the mix proportion of the concrete at the same time, the cost is low, components cooperate with one another synergistically, performance of crack resistance, anti-permeability and the like are remarkably improved, and usage requirements of the bridge concrete on intensity and durability are completely met.

Description

technical field [0001] The present invention relates to concrete, in particular to concrete for bridges. Background technique [0002] Bridge structures are widely used in highway construction and are the hub of traffic engineering. In addition, our country has a vast territory and crisscross rivers and lakes, so the bridge construction technology in our country has developed rapidly by the end of the 20th century. However, carbonation of concrete and chloride ion erosion lead to structural damage of concrete bridges. The durability of the bridge is insufficient, causing great losses. Exceeded people's expectations. Therefore, improving the crack resistance and impermeability of bridge concrete is the key to improving the durability of concrete structures. [0003] For example, the application publication number CN104591628A, the Chinese patent of application publication date 2015.05.06 discloses a kind of concrete used for building bridges, the weight parts of which are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/38C04B16/02C04B24/00C04B20/10
CPCC04B28/00C04B16/02C04B20/1051C04B24/00C04B24/383C04B14/06C04B14/02C04B18/08C04B24/24C04B22/002
Inventor 李涛段玮玮陈正寿
Owner ZHEJIANG OCEAN UNIV