A kind of anti-freezing and thawing water-based epoxy mortar and preparation method thereof

A water-based epoxy, anti-freeze-thaw technology, applied in the field of construction repairs, can solve the problems of epoxy mortar such as long solidification time, poor anti-freeze performance, short gel time, etc., and achieve good workability and good anti-vibration performance , fast curing effect

Active Publication Date: 2021-01-22
武汉楚辰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a water-based epoxy mortar with short gel time, low shrinkage rate, fast curing rate, good vibration resistance and good freeze-thaw resistance and a preparation method thereof, so as to solve the problem of solidification of the existing epoxy mortar Technical problems of long time, high shrinkage rate and poor frost resistance

Method used

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  • A kind of anti-freezing and thawing water-based epoxy mortar and preparation method thereof
  • A kind of anti-freezing and thawing water-based epoxy mortar and preparation method thereof
  • A kind of anti-freezing and thawing water-based epoxy mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Mix 10kg of bisphenol A epoxy resin E-51 with 1kg of reactive diluent butyl glycidyl ether, and leave to stand for defoaming to obtain component A; mix 10kg of triethylenetetramine epoxy adduct, 5kg Tap water, 0.2kg of defoamer and 0.2kg of DMP-30 accelerator are mixed evenly, and left to defoam to obtain component B; 10kg of 20-40 mesh round quartz sand, 5kg of 40-70 mesh round quartz sand, Mix 5kg of 140-mesh round quartz sand and 1kg of micro-silica fume evenly to obtain component C.

[0035] Step 2: Mix 1kg of component A with 1.5kg of component B, stir until pure milky white, then add 25kg of component C to obtain high-strength repair mortar.

[0036] According to test results, its compressive strength is 35MPa, water absorption is less than 0.2%, the mass loss rate after 7 days of 5% hydrochloric acid solution treatment is 2.5%, compressive strength is 28MPa, freeze-thaw test (one cycle: -80 ℃ process 12h , 120°C treatment for 12h) after five cycles, its ...

Embodiment 2

[0038] The preparation method of the freeze-thaw resistant water-based epoxy mortar in Example 2 is exactly the same as that in Example 1, except that the triethylenetetramine epoxy adduct in Example 2 is 15 parts, and the proportions of other components are exactly the same.

Embodiment 3

[0040] The preparation method of the freeze-thaw resistant water-based epoxy mortar in Example 3 is exactly the same as that in Example 1, except that the triethylenetetramine epoxy adduct in Example 3 is 20 parts, and the proportions of other components are exactly the same.

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Abstract

The invention provides freeze-thaw-resistant waterborne epoxy mortar and a preparation method thereof. The freeze-thaw-resistant waterborne epoxy mortar comprises 10 parts of epoxy resin, and every 10parts of epoxy resin correspondingly comprises 10-20 parts of waterborne curing agent, 0.1-3.0 parts of diluent, 0.1-0.5 part of defoaming agent, 0.1-1 part of accelerant, 20-300 parts of quartz sand, 1-30 parts of silica fume and 1-20 parts of water. The freeze-thaw-resistant waterborne epoxy mortar and the preparation method thereof have the advantages that compared with oily epoxy mortar and waterborne emulsion epoxy mortar, the waterborne epoxy mortar is moderate in solid content, high in curing rate, good in anti-vibration performance and very suitable for repair of high-speed rail baseplates; besides, compared with non-round-grain quartz sand, the adopted round-grain quartz sand has a smaller specific surface area and better workability.

Description

technical field [0001] The invention relates to the technical field of building engineering repairs, and more specifically relates to a freeze-thaw-resistant water-based epoxy mortar and a preparation method thereof. Background technique [0002] The Harbin-Dalian high-speed railway is located in an alpine region. Under the action of rain erosion, freeze-thaw cycles and severe vibration, the concrete of the base plate has already appeared chalking, cracking and exposed steel bars. Epoxy mortar used in concrete repair works has the characteristics of high strength, good adhesion, and rapid hardening. Therefore, epoxy mortar has been tried to be applied to the repair of ballastless track base plates. [0003] However, at present, cement is used as the hardener in the main technical direction of water-based epoxy mortar. The main components of hardened cement are alkaline minerals such as calcium hydroxide and calcium aluminate hydrate, and rainwater is weakly acidic, so it wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/14C04B111/76
CPCC04B26/14C04B2111/76C04B14/06C04B2103/50C04B18/146C04B24/023C04B24/281
Inventor 王宏华陈虹程太品饶欢
Owner 武汉楚辰新材料科技有限公司
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