High-toughness epoxy composite grouting material capable of being constructed at low temperature and preparation method thereof

A grouting material and high toughness technology, applied in the field of high toughness epoxy composite grouting material and its preparation, can solve the problems of high temperature sensitivity, debonding, low early strength and the like

Pending Publication Date: 2021-05-07
安徽瑞和新材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cement-based grouting materials are widely used because of their simple preparation and good economy. However, ordinary cement-based grouting materials have slow hydration rate, low early strength and poor corrosion resistance under low temperature conditions.
Epoxy grouting materials have high strength, low cure shrinkage, and good corrosion resistance, but the traditional oily epoxy system is sensitive to temperature, and its viscosity increases under low temperature conditions, resulting in poor groutability. In addition, low-temperature curing agents such as mercaptans Its own viscosity is relatively high, and a large amount of diluent needs to be added, which will have an adverse effect on the strength development
[0003] Chinese patent CN202010408925.5 discloses a cement-based grouting material and its preparation method and application, t

Method used

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  • High-toughness epoxy composite grouting material capable of being constructed at low temperature and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] A high-toughness epoxy composite grouting material capable of low-temperature construction, prepared by the following method:

[0032] (1) Stir 50 parts of water-based epoxy resin and 30 parts of styrene-butadiene emulsion in a beaker at a speed of 160 r / min, add 1 part of polyether-modified polydimethylsiloxane dropwise, and let stand until the bubbles disappear, Obtain A component;

[0033] (2) take by weighing 50 parts of curing agent, add 4 parts of dipropylene glycol methyl ether and 83 parts of water successively, and obtain B component after stirring at a rotating speed of 400r / min;

[0034] (3) Weigh 550 parts of modified cement powder, 1 part of lithium carbonate, 2 parts of tartaric acid, 2 parts of polycarboxylate powder water reducing agent, 35 parts of alkali-resistant glass flakes, and 500 parts of 100-mesh quartz sand, mixed and placed in a mixer Stir evenly at a rotating speed of 120r / min to obtain component C;

[0035] (4) First, the A component and t...

Embodiment 2

[0038] A high-toughness epoxy composite grouting material capable of low-temperature construction, prepared by the following method:

[0039] (1) Stir 70 parts of water-based epoxy resin and 30 parts of styrene-butadiene emulsion in a beaker evenly at a rotating speed of 180 r / min, add 3 parts of polysiloxane dropwise, and let stand until the bubbles disappear to obtain component A;

[0040] (2) take by weighing 70 parts of curing agent, add 7 parts of dipropylene glycol butyl ether and 92 parts of water successively, and obtain B component after stirring at a rotating speed of 450r / min;

[0041](3) Weigh 680 parts of modified cement powder, 1.5 parts of lithium sulfate, 3 parts of boric acid, 4 parts of polycarboxylic acid powder water reducing agent, 40 parts of alkali-resistant glass flakes, and 700 parts of 100-mesh quartz sand and mix them in a mixer Stir evenly at a rotating speed of 150r / min to obtain component C;

[0042] (4) First, the A component and the B component...

Embodiment 3

[0045] A high-toughness epoxy composite grouting material capable of low-temperature construction, prepared by the following method:

[0046] (1) Stir 60 parts of water-based epoxy resin and 40 parts of styrene-butadiene emulsion in a beaker at a rotating speed of 200 r / min, add 2 parts of silicon oxide polyether dropwise, and let stand until the bubbles disappear to obtain component A;

[0047] (2) take by weighing 60 parts of curing agent, add 6 parts of propylene glycol phenyl ether and 91 parts of water successively, and obtain B component after stirring at a rotating speed of 500r / min;

[0048] (3) Weigh 650 parts of modified cement powder, 1 part of lithium chloride, 2 parts of sodium citrate, 3 parts of polycarboxylic acid powder water reducing agent, 55 parts of alkali-resistant glass flakes, and 600 parts of 120-mesh quartz sand and mixed Place in a mixer and stir evenly at a rotating speed of 150r / min to obtain component C;

[0049] (4) First, the A component and th...

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Abstract

The invention relates to a high-toughness epoxy composite grouting material capable of being constructed at low temperature and a preparation method thereof. The epoxy composite grouting material comprises a component A, a component B and a component C, the component A comprises an epoxy emulsion, a styrene-butadiene emulsion and a defoaming agent; the component B comprises a curing agent, a cosolvent and water; and the component C comprises modified cement powder, a coagulant, a retarder, a powder water reducer, alkali-resistant glass flakes and quartz sand. The three components are uniformly mixed and stirred according to a certain proportion and sequence for use. The defects that an existing epoxy mortar grouting material is poor in low-temperature constructability and a common cement-based grouting material is low in early strength are overcome, a waterborne epoxy rapid curing system is combined with a special cementing material, the grouting material has the advantages of being good in groutability and rapid in hardening and early strength under the low-temperature condition, and the grouting material is safe and environmentally friendly. Meanwhile, after being hardened, the material is high in toughness and good in impact resistance and corrosion resistance, and can be widely applied to the fields of building repair and reinforcement, duct grouting, secondary grouting and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-toughness epoxy composite grouting material capable of low-temperature construction and a preparation method thereof. Background technique [0002] The grouting material is injected into the gaps and holes of the structure under the action of its own gravity or a certain pressure. After the material solidifies and hardens, it fills the gap to improve the bearing capacity of the structure and prevent leakage. It is used in highways, bridges, tunnels, and underground structures. It has a wide range of application prospects in projects such as hydraulic structures. Cement-based grouting materials are widely used because of their simple preparation and good economy. However, ordinary cement-based grouting materials have slow hydration rate, low early strength and poor corrosion resistance under low temperature conditions. Epoxy grouting materials have high strength...

Claims

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Application Information

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IPC IPC(8): C04B28/16C04B7/02C04B7/32C04B14/02C04B14/22C04B22/06C04B24/26C04B24/28C04B24/42C04B111/70
CPCC04B28/16C04B24/2676C04B24/281C04B24/42C04B14/024C04B24/287C04B7/02C04B7/32C04B22/064C04B14/22C04B2111/70C04B2201/50C04B2103/0068C04B2103/12C04B2103/22C04B2103/302C04B14/06C04B2103/50C04B24/02C04B24/30C04B24/023
Inventor 夏强温金保杜志芹刘兴荣唐修生祝烨然徐志峰王松季海李建
Owner 安徽瑞和新材料有限公司
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