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Epoxy emulsion modified quick repair mortar for concrete roads and bridges and preparation method for mortar

A technology of epoxy emulsion and repair mortar, which is applied in the field of chemical building materials, can solve the problems of slow development of repair mortar or concrete early strength, difficulty in meeting the strength index requirements at the same time, and difficulty in preparing quick repair materials, etc., so as to achieve operability in construction The effect of prolonged time, improved curing rate, and good early hardening time

Inactive Publication Date: 2013-09-18
SHANXI PROVINCIAL RES INST OF COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such materials are usually modified inorganic early-strength cement mortar or concrete by polymer emulsion. Among the many polymer emulsions used, such as polyvinyl acetate emulsion, acrylate emulsion, etc., all of them will retard the cement to a certain extent. , resulting in slow early strength development of repair mortar or concrete, making it difficult to formulate quick repair materials
At home and abroad, imported styrene-butadiene emulsion is basically used to prepare quick repair materials, such as DL470 styrene-butadiene emulsion produced by Dow in the United States and 623 styrene-butadiene emulsion produced by BASF in Germany. This is because styrene-butadiene emulsion basically has no retardation for cement Effect, in CN 1415572A "a polymer modified quick repair material" and CN101481236A "cement concrete pavement staggered quick repair material and its repair method" two patent documents all adopt styrene-butadiene emulsion as modifier, and for epoxy There are few reports on the use of emulsion as a modifier to prepare quick repair mortar
[0005] At the same time, the traffic department requires that the 4H compressive strength of the concrete road bridge repair material reach 25MPa, and the 4H flexural strength reach 3.5MPa to reopen the traffic, so as not to affect the traffic. In addition, it is also required that the positive tensile bond strength with the old concrete should be greater than 2.5MPa , and the above-mentioned rapid repair materials are generally difficult to meet the requirements of these strength indicators at the same time

Method used

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  • Epoxy emulsion modified quick repair mortar for concrete roads and bridges and preparation method for mortar

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1) Preparation of component A: add 100 parts of epoxy resin E-44, 10 parts of acryl glycidyl ether, 15 parts of Qishi toughening agent QS-BE, and 0.1 part of silicone defoamer into the reaction kettle in sequence , stir for 5-10 minutes to obtain component A, pack and store;

[0045] 2) Preparation of component B: 100 parts of water-based epoxy curing agent GCA01 produced by Shanghai Lujia Water-based Coatings Co., Ltd. (active ingredient content: 50wt%, the rest is water), 5 parts of DMP-30, and coupling agent KH 1 part of -550, add to the reaction kettle one by one, stir for 3-5 minutes to obtain component B, pack and store;

[0046] 3) Preparation of component C: 100 parts of rapid-hardening sulfoaluminate cement, 200 parts of a mixture of 40-70 mesh quartz sand and 20-40 mesh quartz sand in a mass ratio of 4:1, 20 parts of metakaolin, and Luoyang 15 parts of calcium sulfate whiskers with an average diameter of 1-8 μm and an average length of 50-200 μm produced by L...

Embodiment 2

[0050] 1) Preparation of component A: Add 100 parts of epoxy resin E-51, 5 parts of acryl glycidyl ether, 15 parts of Qishi toughening agent QS-BE, and 0.1 part of silicone defoamer into the reaction kettle in sequence , stir for 5-10 minutes to obtain component A, pack and store;

[0051] 2) Preparation of component B: Add 100 parts of water-based epoxy curing agent GCA01, 5 parts of DMP-30, and 1 part of coupling agent KH-550 into the reaction kettle in sequence, and stir for 3-5 minutes to obtain component B. packaging storage;

[0052] 3) Preparation of component C: 100 parts of rapid-hardening sulfoaluminate cement, 200 parts of a mixture of 40-70 mesh quartz sand and 20-40 mesh quartz sand in a mass ratio of 4:1, 20 parts of metakaolin, sulfuric acid Add 15 parts of calcium whiskers, 0.35 parts of a mixture of aluminum sulfate and calcium fluoride with a mass ratio of 1:1, 0.2 parts of boric acid, and 0.2 parts of polycarboxylate superplasticizer into the reaction kettl...

Embodiment 3

[0056] 1) Preparation of component A: add 100 parts of epoxy resin NPEF170, 15 parts of KISS toughening agent QS-BE, and 0.1 part of silicone defoamer into the reaction kettle in sequence, and stir for 5-10 minutes to obtain A Components, packaging and storage;

[0057] 2) Preparation of component B: Add 100 parts of water-based epoxy curing agent GCA01, 5 parts of DMP-30, and 1 part of coupling agent KH-550 into the reaction kettle in sequence, and stir for 3-5 minutes to obtain component B. packaging storage;

[0058] 3) Preparation of component C: 100 parts of rapid-hardening sulfoaluminate cement, 200 parts of a mixture of 40-70 mesh quartz sand and 20-40 mesh quartz sand in a mass ratio of 4:1, 20 parts of metakaolin, sulfuric acid Add 15 parts of calcium whiskers, 0.35 parts of a mixture of aluminum sulfate and calcium fluoride with a mass ratio of 1:1, 0.2 parts of boric acid, and 0.2 parts of polycarboxylate superplasticizer. Get component C, pack and store;

[0059...

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Abstract

The invention discloses epoxy emulsion modified quick repair mortar for concrete roads and bridges and a preparation method for the mortar, and belongs to the technical field of chemical construction materials. The prepared epoxy emulsion modified quick repair mortar for the concrete roads and bridges is good in construction performance, high in early strength and stable in later strength, does not shrink, and can be formed by selecting a proper formula according to different engineering requirements; the early strength is increased quickly, the repair speed is high, the traffic can be opened in 4 hours, the 4H compressive strength is more than 25MPa, and the 4H breaking strength is more than 3.5MPa; and the mortar is highly bonded to an old concrete base layer, and the positive pulling bonding strength in 28 days is more than 2.5MPa; and the mortar is good in freezing resistance and impermeability. The mortar mainly solves the problems of long traffic opening time, low bonding strength with the old concrete base material, poor durability and the like of the conventional quick repair mortar for the concrete roads and bridges.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials, and in particular relates to an epoxy emulsion modified concrete road bridge rapid repair mortar and a preparation method thereof. Background technique [0002] Although concrete is widely used in various fields as the main building material because of its durability, its structures are often affected by improper design, poor construction quality or service environment during construction or service, such as heavy loads, chlorine, etc. Damage caused by factors such as ion penetration, freeze-thaw cycle, carbonization, surface abrasion, corrosive medium erosion, and earthquakes. Although these damages are initially shallow and have little impact on the structure or performance of structures, if they are not repaired or Reinforcement, as time goes by, this kind of damage will gradually extend to the inner structural material, which will eventually affect the performance and serv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B111/72
Inventor 舒兴旺杜素军崔东霞丰功吉王海波刘俊权
Owner SHANXI PROVINCIAL RES INST OF COMM
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