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A kind of waterproofing agent for concrete and preparation method thereof

A waterproofing agent and concrete technology, which is applied in the field of building materials, can solve the problems of surface waterproofing layer falling off waterproofing effect, waterproofing performance, waterproofing performance defects, failure, etc., to achieve good waterproofing effect, strengthen hydrophobic effect, and firm waterproofing effect

Active Publication Date: 2022-07-12
广东邦润建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the existing different types of waterproofing agents, which have defects in early waterproof performance or later waterproof performance, especially during the use of concrete, the surface waterproof layer will fall off due to moisture invasion, causing the waterproof effect to fail defects and deficiencies, a concrete waterproofing agent and preparation method thereof are provided

Method used

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  • A kind of waterproofing agent for concrete and preparation method thereof
  • A kind of waterproofing agent for concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] After mixing graphene oxide and water in a mass ratio of 1:5, at a temperature of 80 °C and an ultrasonic frequency of 100 kHz, the temperature was 80 ° C and the ultrasonic frequency was 100 kHz, and the ultrasonic dispersion was carried out for 10 min, and then 10% of the graphene oxide mass was added. At a temperature of 85 °C, after heating and refluxing for 4 hours, filter, collect the filter cake, and wash the filter cake with deionized water 3 times, and then transfer the washed filter cake to an oven, and dry it at a temperature of 100 °C To constant weight, get dry filter cake, namely pretreatment graphene oxide;

[0037] In parts by weight, take 10 parts of bacterial cellulose, 60 parts of concentrated sulfuric acid, and 100 parts of n-hexanol in sequence, first mix the concentrated sulfuric acid and n-hexanol, cool to room temperature, then add bacterial cellulose, and at room temperature, use The stirrer was stirred at 150r / min for 2 hours, then washed with ...

Embodiment 2

[0043] After mixing graphene oxide and water at a mass ratio of 1:8, at a temperature of 85 °C and an ultrasonic frequency of 110 kHz, the temperature was 85 ° C and the ultrasonic frequency was 110 kHz, and the ultrasonic dispersion was carried out for 50 min, and then 12% of the graphene oxide mass was added. At a temperature of 88 °C, after heating and refluxing for 6 hours, filter to collect the filter cake, and wash the filter cake with deionized water for 5 times, and then transfer the washed filter cake to an oven and dry it at a temperature of 110 °C To constant weight, get dry filter cake, namely pretreatment graphene oxide;

[0044]In parts by weight, sequentially take 20 parts of bacterial cellulose, 70 parts of concentrated sulfuric acid, and 110 parts of n-hexanol, first mix the concentrated sulfuric acid and n-hexanol, cool to room temperature, then add bacterial cellulose, and at room temperature, use The stirrer was stirred at 200r / min for 3 hours, washed with ...

Embodiment 3

[0050] After mixing graphene oxide and water at a mass ratio of 1:10, at a temperature of 90 ° C and an ultrasonic frequency of 120 kHz, the temperature was 90 ° C and the ultrasonic frequency was 120 kHz, and the ultrasonic dispersion was carried out for 60 min, and then 15% of the graphene oxide mass was added. At a temperature of 90 °C, after heating and refluxing for 8 hours, filter, collect the filter cake, and wash the filter cake with deionized water 6 times, and then transfer the washed filter cake to an oven, and dry it at a temperature of 120 °C To constant weight, get dry filter cake, namely pretreatment graphene oxide;

[0051] In parts by weight, take 30 parts of bacterial cellulose, 80 parts of concentrated sulfuric acid, and 120 parts of n-hexanol in turn, mix concentrated sulfuric acid and n-hexanol, cool to room temperature, then add bacterial cellulose, and at room temperature, use The stirrer was stirred at 300r / min for 4 hours, then washed with sodium hydro...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to a waterproofing agent for concrete and a preparation method thereof. The product developed by the present invention includes the following raw materials in parts by weight: 10-20 parts of sulfated bacterial cellulose, 10-25 parts of graphene oxide, 300-500 parts of water, 0.3-0.5 parts of citric acid, 3-5 parts of parts of organosilane, 0.1-0.3 parts of sodium hypophosphite, and 0.1-0.3 parts of emulsifier; the organosilane is embedded between graphene oxide layers. Wherein, the graphene oxide molecular structure includes a conjugated region, the conjugated region includes a hydroxyl group and an epoxy group, and at least part of the epoxy group is substituted by octadecylamine. In addition, it also includes gelatin with a mass of 10-20% of sulfated bacterial cellulose; the gelatin is selected from gelatin with an isoelectric point of 6.0-6.5. The product obtained by the invention has excellent long-term waterproof performance.

Description

technical field [0001] The invention belongs to the technical field of building materials. More specifically, it relates to a waterproofing agent for concrete and a preparation method thereof. Background technique [0002] Water repellent is an admixture that can reduce the water permeability of mortar and concrete under hydrostatic pressure, and can be used to improve the impermeability of concrete, thereby improving the water tightness and hydrophobicity of concrete. The main types of waterproofing agents are inorganic waterproofing agents, silicone waterproofing agents, intumescent waterproofing agents and aliphatic waterproofing agents. [0003] The inorganic water repellents used in the early days are mainly chloride salt water repellents. Such water repellents can act with cement to form double salts during the hardening process of cement, fill the gaps in concrete and mortar, and improve the compactness and impermeability of concrete. , so as to play the role of wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B103/65
CPCC04B40/0039C04B2103/65C04B24/383C04B14/024C04B24/06C04B24/42C04B22/16C04B2103/40Y02W30/91
Inventor 李占群
Owner 广东邦润建设有限公司
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