Portland cement-sulphate aluminum cement-gypsum-polymer composite waterproof mortar and preparation method thereof

A technology of sulfoaluminate cement and Portland cement is applied in the field of preparation of waterproof mortar materials for construction projects, and can solve the problems of not well-solved performance problems, incomplete hydration reaction, poor waterproof effect, etc. Excellent construction performance, good hydrophobicity, high flexural and compressive strength

Active Publication Date: 2014-07-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing polymer cement waterproof mortar is mostly a two-component product of a single inorganic gel system, and the hydration reaction is incomplete in a low temperature environment, the early compressive strength of the product is low, the impermeability is poor, and the waterproof effect is not good. Its application is limited
Chinese invention patent application CN102503300 uses 5%-10% of butadiene-styrene copolymer redispersible latex powder with a glass transition temperature of 16...

Method used

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  • Portland cement-sulphate aluminum cement-gypsum-polymer composite waterproof mortar and preparation method thereof
  • Portland cement-sulphate aluminum cement-gypsum-polymer composite waterproof mortar and preparation method thereof
  • Portland cement-sulphate aluminum cement-gypsum-polymer composite waterproof mortar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Inorganic cementitious materials: 50 parts of fly ash Portland cement, 13 parts of high-strength sulfoaluminate cement and 12 parts of dihydrate gypsum;

[0043] Redispersible latex powder: 7 parts of vinegar-propylene rubber powder; additive: 2.5 parts of sulfamate powder superplasticizer; filler: 15.5 parts of glass powder (2500 mesh); water-binder ratio: 0.6;

[0044] The preparation includes the following steps:

[0045] (1) Preparation of powder: In terms of mass parts, 50 parts of fly ash portland cement, 13 parts of high-strength sulfoaluminate cement, 12 parts of dihydrate gypsum, 7 parts of vinegar-propylene rubber powder, and 15.5 parts of glass powder Parts (2500 mesh) and 2.5 parts of sulfamate powder high-efficiency superplasticizer are accurately weighed, and then stirred with a dry powder mixer (rotation speed: 300r / min) for 30 minutes until the powder is fully mixed and evenly prepared to obtain the powder of waterproof slurry ;

[0046] (2) During con...

Embodiment 2

[0052] Inorganic cementitious materials: 49 parts of pozzolanic Portland cement, 21 parts of quick-hardening sulfoaluminate cement and 7 parts of anhydrous anhydrite; redispersible latex powder: 8 parts of EVA rubber powder; admixture: melamine type sulfonate 1.5 parts of high-efficiency powder superplasticizer of acidified polycondensate; filler: 13.5 parts of superfine calcium carbonate (1500 mesh);

[0053] Water-binder ratio: 0.5;

[0054] The preparation includes the following steps:

[0055] (1) Preparation of powder: in parts by mass, 49 parts of pozzolanic Portland cement, 21 parts of rapid hardening sulfoaluminate cement, 7 parts of anhydrous anhydrite, 8 parts of EVA rubber powder, superfine carbonic acid After accurately weighing 13.5 parts of calcium (1500 mesh) and 1.5 parts of melamine-type sulfonated polycondensate high-efficiency powder water reducer, stir with a dry powder mixer (rotating speed: 500r / min) for 15 minutes until the powder is fully mixed and eve...

Embodiment 3

[0062] Inorganic cementitious materials: 48 parts of ordinary Portland cement, 12 parts of low-alkalinity sulfoaluminate cement and 6 parts of α hemihydrate gypsum;

[0063] Redispersible latex powder: 14 parts of SBR rubber powder; admixture: 3 parts of powder polycarboxylate superplasticizer; filler: 17 parts of superfine quartz sand (1000 mesh); water-binder ratio: 0.4;

[0064] The preparation includes the following steps:

[0065] (1) Preparation of powder: in parts by mass, 48 ​​parts of ordinary Portland cement, 12 parts of low-alkalinity sulfoaluminate cement, 6 parts of α hemihydrate gypsum, 14 parts of SBR rubber powder, ultra-fine quartz After accurately weighing 17 parts of sand (1000 mesh) and 3 parts of powder polycarboxylate high-efficiency superplasticizer, stir with a dry powder mixer (rotation speed: 600r / min) for 14 minutes until the powder is fully mixed and evenly prepared to obtain a waterproof slurry Powder;

[0066] (2) During construction, pour the p...

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Abstract

The invention discloses portland cement-sulphate aluminum cement-gypsum-polymer composite waterproof mortar and a preparation method thereof. The method comprises the following steps: weighing the following raw materials in parts by weight: 35-50 parts of portland cement, 12-21 parts of sulphate aluminum cement, 5-12 parts of gypsum, 7-18 parts of redispersible polymer powder, 13.5-19 parts of filler and 1-3 parts of additive, and then stirring until the powder is fully and evenly mixed, so as to prepare the powder of waterproof mortar; in construction, pouring the powder into an agitator, adding water according to a mass ratio of the powder to water being 1:(0.4-0.6), and agitating until uniform mucilage free of aggregation is generated, so as to obtain the waterproof mortar. The mortar disclosed by the invention has excellent waterproof plugging effect. In addition, the mortar also has the advantages of good anti-permeability, high bonding strength, low shrinkage rate and the like, is applicable to special engineering in cold winter or relatively cold weather, and meets the requirements of engineering on properties such as early strength performance and water resistance.

Description

technical field [0001] The invention relates to the field of preparation of construction engineering waterproof mortar materials, in particular to Portland cement-sulfoaluminate cement-gypsum-polymer composite waterproof mortar and a preparation method thereof. Background technique [0002] It has always been a difficult problem in construction technology to effectively solve the leakage of building structures and prolong the life of buildings. The existence and migration of water is often an important cause of damage to the performance of concrete and masonry structures, such as carbonation of concrete and mortar, corrosion of steel bars, freeze-thaw damage, and moldy walls are all related to the existence and migration of water. In addition to achieving waterproof and anti-seepage through a dense structure, the use of waterproof materials has become an indispensable means of waterproofing. Traditional waterproof materials include water-based and solvent-based asphalt-base...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B28/06C04B28/04C04B14/06C04B14/28
Inventor 瞿金清段晓俊
Owner SOUTH CHINA UNIV OF TECH
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