A kind of epoxy resin-based concrete for building and its preparation process

An epoxy resin and concrete technology, applied in the construction field, can solve the problems of poor weather resistance, building collapse, steel corrosion, etc., and achieve the effect of high hydrophobic performance and high weather resistance

Active Publication Date: 2021-08-10
中山市粤华混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an epoxy resin-based concrete for construction and its preparation process. The modified aging-resistant grafted rubber powder and fluorosilanized zeolite powder of the concrete are cross-linked into a network skeleton structure through epoxy resin , the entire network skeleton structure is interspersed in the concrete gap, and a large number of siloxane bonds and fluorine functional groups are evenly distributed on the network skeleton structure, and the siloxane bonds and fluorine functional groups are filled in the gaps of the concrete, making Concrete has high hydrophobic performance and weather resistance, which solves the problem of poor hydrophobicity of existing concrete. Water enters from the concrete gap and contacts with steel bars, which easily causes corrosion of steel bars, which in turn reduces the supporting capacity of the building and causes the building to collapse. It is easy to cause performance degradation, easy cracking and poor weather resistance at higher and lower temperatures

Method used

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  • A kind of epoxy resin-based concrete for building and its preparation process
  • A kind of epoxy resin-based concrete for building and its preparation process
  • A kind of epoxy resin-based concrete for building and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The specific preparation process of fluorosilanized zeolite powder is as follows:

[0035]Step 1: Dissolve 71g of acrylamide in 200mL of water to obtain an acrylamide solution;

[0036] Step 2: Add 125g of trifluoroacetic anhydride and 200mL of dimethyl sulfoxide to the reaction vessel, stir and mix evenly, then slowly add the acrylamide solution prepared in step 1 dropwise, and raise the temperature while adding, and the heating time speed is controlled at 1°C per minute, stop the temperature rise until the temperature rises to 100°C, and then react at a constant temperature for 8 hours to obtain fluoroalkylated acrylamide;

[0037] Step 3: Add 96g of methyl methacrylate into the ethanol solution, then pour the mixed solution into the flask, and add 200g of zeolite powder to it at the same time, stir and mix evenly, put the flask into an ice-water bath, and vacuumize for 1 hour while Stir while vacuuming, then stop vacuuming, take out the flask and put it in a room te...

Embodiment 2

[0040] The specific preparation process of fluorosilanized zeolite powder is as follows:

[0041] Step 1: Dissolve 71g of acrylamide in 200mL of water to obtain an acrylamide solution;

[0042] Step 2: Add 125g of trifluoroacetic anhydride and 200mL of dimethyl sulfoxide to the reaction vessel, stir and mix evenly, then slowly add the acrylamide solution prepared in step 1 dropwise, and raise the temperature while adding, and the heating time speed is controlled at 1°C per minute, stop the temperature rise until the temperature rises to 100°C, and then react at a constant temperature for 8 hours to obtain fluoroalkylated acrylamide;

[0043] Step 3: Add 98g of methyl methacrylate into the ethanol solution, then pour the mixed solution into the flask, and add 200g of zeolite powder to it at the same time, stir and mix evenly, put the flask into an ice-water bath, and vacuumize for 1h, while Stir while vacuuming, then stop vacuuming, take out the flask and put it in a room temp...

Embodiment 3

[0046] The specific preparation process of aging-resistant grafted rubber powder is as follows:

[0047] ① Add 1.1kg of rubber powder into 2L of 15% sodium hydroxide solution, heat up to 50°C, stir for 1 hour, then filter, and add the filtered rubber powder into 2L of 5% nitric acid solution. After heating up to 60°C, stir and react for 30 minutes, filter, wash with sodium carbonate solution until neutral, and dry to obtain pretreated rubber powder;

[0048] ②Add 1kg of pretreated rubber powder to acetone, then add 355g of azobisisobutyronitrile to it, raise the temperature to 90°C, add 680g of fluoroalkylated acrylamide dropwise, react for 5 hours after the dropwise addition, and then raise the temperature to 120°C ℃, continue to add 355g of azobisisobutyronitrile, and react for 2 hours to obtain aging-resistant grafted starch glue.

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Abstract

The invention discloses an epoxy resin-based concrete for construction, which comprises the following components in parts by weight: 8-12 parts of fluorosilanized zeolite powder, 32-33 parts of bisphenol A epoxy resin, aging-resistant grafted rubber powder 26‑27 parts, bentonite 21‑28 parts, cement 23‑26 parts, gravel 132‑145 parts, sand 183‑192 parts, baking soda 0.6‑0.8 parts, water reducing agent 5‑7 parts, water 160‑180 parts . The aging-resistant grafted rubber powder and fluorosilanized zeolite powder of the modified concrete of the present invention are cross-linked by epoxy resin to form a network skeleton structure, the entire network skeleton structure is interspersed in the concrete gap, and A large number of siloxane bonds and fluorine functional groups are evenly distributed, and the siloxane bonds and fluorine functional groups are filled in the gaps of the concrete, making the concrete have high hydrophobicity and weather resistance.

Description

technical field [0001] The invention belongs to the field of construction and relates to epoxy resin-based concrete for construction and a preparation process thereof. Background technique [0002] Concrete is widely used in the field of construction. In building construction, concrete is used to bond and fix steel bars and support buildings through steel bars. However, the existing concrete has low waterproof ability. For buildings such as bridge piers that have been soaked in water for a long time Soaking, water enters from the concrete gap and contacts the steel bar, which is easy to cause corrosion of the steel bar, which in turn reduces the supporting capacity of the building and causes the building to collapse. At the same time, the concrete is used for supporting. It is easy to cause performance degradation, easy to crack, and poor weather resistance. Contents of the invention [0003] The purpose of the present invention is to provide an epoxy resin-based concrete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B14/047C04B24/281C04B16/04C04B14/104C04B18/12C04B14/068C04B22/10C04B2103/302
Inventor 不公告发明人
Owner 中山市粤华混凝土有限公司
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