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Cement-based capillary crystalline waterproof material and preparation method thereof

A technology of permeable crystallization and waterproof materials, applied in the field of building materials, can solve the problems of unsatisfactory plugging effect of calcium silicate crystals on pores and slow crystallization rate, so as to speed up hydration and crystal formation, increase crystallization rate, and improve The effect of compressive strength

Active Publication Date: 2020-12-29
安徽朗凯奇科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It increases the elasticity of the cement-based permeable crystalline waterproof material, reduces the internal stress at the crack, and improves the compressive strength of the concrete. However, the above-mentioned cement-based permeable crystalline waterproof material has a slow crystallization rate in the early stage and insufficient reinforcement for the concrete in the later stage. , the resulting calcium silicate crystals have an unsatisfactory plugging effect on the pores

Method used

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  • Cement-based capillary crystalline waterproof material and preparation method thereof
  • Cement-based capillary crystalline waterproof material and preparation method thereof
  • Cement-based capillary crystalline waterproof material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A cement-based permeable crystalline waterproof material, comprising the following raw materials in parts by weight: 38 parts of cement; 15 parts of sodium silicate; 5 parts of N, N'-bis(oxalylphenyl) oxalamide; 5 parts of organic acid; 0.2 part of sodium gluconate; 9 parts of surfactant; 6 parts of zeolite; 5 parts of redispersible latex powder; 1 part of hyperbranched polymer; 10 parts of quartz sand; 7 parts of mineral powder;

[0025] Among them, the molecular formula of sodium silicate is Na 2 O 2SiO 2 , the organic acid is powdered EDTA, the surfactant is alkyl dimethyl sulfoethyl betaine, the zeolite is natural zeolite, and the natural zeolite is clinoptilolite, mordenite, and chabazite. The dispersible latex powder is a copolymer of ethylene / vinyl acetate, and the hyperbranched polymer is a hydroxyl-terminated hyperbranched polyester. The hydroxyl number of the hydroxyl-terminated hyperbranched polyester is 10-12 / mol, and the hydroxyl value is 600 mg KOH / g, a...

Embodiment 5

[0039] A cement-based osmotic crystalline waterproof material, which is different from Example 1 in that no zeolite component is added, and the other components are the same;

[0040]Preparation method: Since no zeolite component is added, the preparation method is adjusted accordingly, that is, cement, sodium silicate, organic acid, sodium gluconate, surfactant, dispersible latex powder, hyperbranched polymer, quartz sand, Mineral powder and N,N'-bis(oxalylphenyl)oxalamide are mixed and stirred evenly;

Embodiment 6

[0041] Embodiment 6: A cement-based permeable crystalline waterproof material. The difference from Embodiment 1 is that no organic acid component is added, and the other components are the same;

[0042] Preparation method: Since no organic acid component is added, the preparation method is adjusted accordingly, as follows:

[0043] S101: Mix N,N'-bis(oxalylphenyl)oxalamide and zeolite evenly, add an appropriate amount of pure water, wherein the pure water can cover the mixture, stir for 15 minutes, and stand at 5°C for 20 minutes;

[0044] S102: At 10°C, dry the mixture after standing to remove moisture to obtain a mixture A of N,N'-bis(oxalylphenyl)oxalamide and zeolite, so that part N,N' - bis(oxalylphenyl) oxalamide is adsorbed in the pores of zeolite to store N,N'-bis(oxalylphenyl) oxalamide;

[0045] S103: uniformly mix cement, sodium silicate, sodium gluconate, surfactant, dispersible latex powder, hyperbranched polymer, quartz sand and mineral powder to obtain mixture...

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Abstract

The invention discloses a cement-based capillary crystalline waterproof material and a preparation method thereof. The cement-based capillary crystalline waterproof material comprises the following raw materials in parts by weight: 35-55 parts of cement; 10-25 parts of sodium silicate; 2-8 parts of N, N '-bis (oxalyl phenyl) oxamide; 3-9 parts of organic acid; 0.1-0.5 part of sodium gluconate; 8-15 parts of a surfactant; 5-10 parts of zeolite; 3-8 parts of redispersible latex powder; 1-3 parts of a hyperbranched polymer; 8-16 parts of quartz sand; and 5-10 parts of mineral powder. The N, N '-bis (oxalyl phenyl) oxamide can be partially hydrolyzed to generate oxalic acid, the oxalic acid and calcium ions in the concrete are subjected to a chemical reaction to generate insoluble crystals, the crystals and calcium silicate crystals are different in structure, gaps can be filled more hermetically through cooperation of the crystals and the calcium silicate crystals, and in the later self-repairing stage, the N, N'-bis (oxalyl phenyl) oxamide adsorbed in zeolite is slowly released, so that the effect of assisting in repairing the gap for a long time is achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a cement-based permeable crystalline waterproof material and a preparation method thereof. Background technique [0002] A cement-based permeable crystalline waterproof material with the application number "CN201710731382.9" in the prior art, including the following raw materials in parts by weight: cement: 30-50 parts; sodium silicate: 8-20 parts; complexing agent: 2-10 parts; Powdered organic acid: 3-6 parts; Redispersible latex powder: 2-8 parts; Hyperbranched polymer: 0.5-4 parts; Fly ash: 10-20 parts; Mineral powder: 6 parts -12 parts; water reducer: 0.1-1.5 parts; the mass ratio of the redispersible latex powder and the hyperbranched polymer is 4:1; the complexing agent is at least one of EDTA and oxalic acid; The powdery organic acid is at least one of citric acid, benzoic acid, and fumaric acid; the hyperbranched polymer is a hydroxyl-terminated hyperbranched ...

Claims

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Application Information

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IPC IPC(8): C04B28/26C04B111/27C04B24/12
CPCC04B28/26C04B2201/50C04B2111/27C04B7/00C04B24/124C04B24/06C04B24/123C04B24/16C04B14/047C04B24/283C04B14/06C04B18/141C04B24/2623
Inventor 乔启信
Owner 安徽朗凯奇科技股份有限公司
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