Bridge expansion joint fast reparation material

A technology for repairing materials and expansion joints, which is applied in the field of rapid repair materials for bridge expansion joints. It can solve the problems of long maintenance period, poor bonding, and susceptibility to impact fracture, etc., and achieve good steric resistance effect and good construction performance.

Active Publication Date: 2016-04-27
甘肃省交通规划勘察设计院股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ⑴Expansion joint maintenance is a maintenance project, which needs to close the traffic, resulting in a decrease in road traffic rate. For expressways, the resulting losses are even more serious
Conventional cement concrete materials have a long maintenance period and need to close the road for a long time
[0005] (2) Expansion joints belong to the joints of roads and bridges, and need to have good bonding with steel plates and old concrete. Secondly, they must withstand load deformation. Therefore, th

Method used

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  • Bridge expansion joint fast reparation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 A kind of bridge expansion joint rapid repair material, it is made up of two kinds of components of A and B; Wherein

[0028] A consists of the following components in parts by weight: 25 parts of rapid hardening sulfoaluminate cement, 5 parts of ordinary portland cement, 3 parts of anhydrite, 3 parts of silica fume, 60 parts of quartz sand, 0.5 parts of water reducer, boric acid 0.5 parts, fiber 3 parts;

[0029] B consists of the following components in parts by weight: 35 parts of carboxylated styrene-butadiene latex, 0.5 parts of lithium salt, 0.5 part of lithium salt defoamer, and 65 parts of water.

[0030] Among them: the strength grade of rapid hardening sulfoaluminate cement is 42.5 or 52.5. The strength grade of ordinary Portland cement is 52.5. The specific surface area of ​​silica fume is 20000m 2 / kg. The water reducer is a polycarboxylate high performance water reducer. The fiber refers to the mixture of polypropylene fibers with a diamet...

Embodiment 2

[0036] Embodiment 2 A kind of bridge expansion joint rapid repair material, it is made up of two kinds of components of A and B; Wherein

[0037] A is composed of the following components in parts by weight: 25 parts of rapid hardening sulfoaluminate cement, 5 parts of ordinary portland cement, 3 parts of anhydrite, 1.5 parts of silica fume, 60 parts of quartz sand, 0.5 parts of water reducer, boric acid 1 part, fiber 2 parts;

[0038] B consists of the following components in parts by weight: 45 parts of carboxylated styrene-butadiene latex, 0.5 parts of lithium salt, 0.5 part of lithium salt defoamer, and 59 parts of water.

[0039] Wherein: rapid-hardening sulfoaluminate cement, ordinary Portland cement, silica fume, water reducing agent, and fiber are the same as in Example 1.

[0040] The using method of this bridge expansion joint rapid repair material is the same as embodiment 1.

Embodiment 3

[0041] Embodiment 3 A kind of bridge expansion joint rapid repair material, it is made up of two kinds of components of A and B; Wherein

[0042] A consists of the following components in parts by weight: 28 parts of rapid hardening sulfoaluminate cement, 10 parts of ordinary portland cement, 1 part of anhydrite, 1 part of silica fume, 55 parts of quartz sand, 1 part of water reducer, boric acid 1 part, 3 parts fiber;

[0043] B consists of the following components in parts by weight: 40 parts of carboxylated styrene-butadiene latex, 0.75 parts of lithium salt, 0.75 parts of lithium salt defoamer, and 58.5 parts of water.

[0044] Wherein: rapid-hardening sulfoaluminate cement, ordinary Portland cement, silica fume, water reducing agent, and fiber are the same as in Example 1.

[0045] The using method of this bridge expansion joint rapid repair material is the same as embodiment 1.

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Abstract

The invention relates to a bridge expansion joint fast reparation material which is composed of a component A and a component B. The component A is composed of, by weight, 25-30 parts of fast-hardening sulphoaluminate cement, 5-10 parts of ordinary Portland cement, 1-3 parts of anhydrite, 1-3 parts of silica fume, 55-65 parts of quartz sand, 0.5-1 part of a water reducing agent, 0.5-1 part of boric acid, and 1-3 parts of fiber. The component B is composed of, by weight, 35-45 parts of carboxylic butadiene-styrene latex, 0.5-1 part of lithium salt, 0.5-1 part of a lithium salt defoaming agent, and 55-65 parts of water. The material has the characteristics of high early strength, stably increasing late strength, low elastic modulus, high bonding strength, cracking resistance, and the like. In practical construction, the material is simple to use.

Description

technical field [0001] The invention relates to a super-early-strength flexible concrete material, in particular to a rapid repair material for bridge expansion joints. Background technique [0002] When the concrete on both sides of the bridge expansion joint is impacted, it is easy to produce stress concentration and cause damage. Concrete damage on both sides of expansion joints and bond failure between concrete and steel plates and old concrete are the main forms of expansion joint damage, which will cause further damage such as exposed steel plates in expansion joints, broken steel bars, etc., and eventually lead to the connection between the road surface and the bridge deck If it is not smooth, it will cause early damage and affect traffic operation. [0003] Due to the special effects of expansion joints, their service life is relatively low, and some of them were even damaged in the year they were opened to traffic. Due to the limitation of location and service envi...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/72
CPCC04B28/14C04B2111/723C04B7/32C04B7/02C04B18/146C04B14/06C04B2103/302C04B22/082C04B14/38C04B24/2688C04B22/08C04B2103/50C04B24/24
Inventor 魏定邦丁民曹青霞李晓民钱普舟张国宏
Owner 甘肃省交通规划勘察设计院股份有限公司
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