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Alkali-free type cement-based permeating crystallizing waterproof material

A penetrating crystalline waterproofing, cement-based technology, used in concrete mixed with waterproofing agent, alkali-free cement-based penetrating crystalline waterproofing materials, and waterproofing materials, can solve problems such as the decline of concrete durability and alkali-aggregate reaction.

Inactive Publication Date: 2013-04-17
北京建研昆仑科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After contact with water, the active substance and Ca(OH) in concrete 2 A chemical reaction occurs to form water-insoluble dendritic crystals to block the pores of concrete, thereby improving the impermeability of concrete. However, its components mostly contain inorganic sodium salts or organic sodium salts, which easily lead to alkali-aggregate reaction. There is a safety hazard that the durability of concrete will decrease

Method used

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  • Alkali-free type cement-based permeating crystallizing waterproof material
  • Alkali-free type cement-based permeating crystallizing waterproof material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An alkali-free cement-based permeable crystalline waterproof material, the composition formula of which is:

[0019] Ordinary Portland cement 25 parts, calcium carbonate 20 parts, silica fume 5 parts, fly ash 10 parts, calcium lactate pentahydrate 20 parts, calcium chloride dihydrate 40 parts, rubber powder 1 part.

Embodiment 2

[0021] An alkali-free cement-based permeable crystalline waterproof material, the composition formula of which is:

[0022] 60 parts of sulfoaluminate cement, 2 parts of calcium carbonate, 20 parts of silica fume, 30 parts of fly ash, 5 parts of anhydrous calcium lactate, 5 parts of anhydrous calcium chloride, and 8 parts of rubber powder.

Embodiment 3

[0024] An alkali-free cement-based permeable crystalline waterproof material, the composition formula of which is:

[0025] 40 parts of ferrite-aluminate cement, 30 parts of calcium carbonate, 30 parts of silica fume, 40 parts of fly ash, 10 parts of anhydrous calcium lactate, 20 parts of anhydrous calcium chloride, and 10 parts of rubber powder.

[0026] The material components of the above examples 1-3 were all dried, ground until no agglomeration, added to a mixer, and mixed evenly to obtain an external-coated non-alkali cement-based permeable crystalline waterproof material.

[0027] Before the construction of this waterproof material, the surface of the concrete base is cleaned and leveled to keep the base moist and free of clear water. Add water with a weight ratio of 25-35% to the dry powder of the waterproof material, stir well, brush it on the base surface, repeat the brushing to a certain thickness, and maintain it for more than 3 days. Its performance test is shown...

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Abstract

The invention relates to an alkali-free type cement-based permeating crystallizing waterproof material, which comprises, by weight: 25-60 parts of cement, 2-30 parts of calcium carbonate, 5-30 parts of silicon ash, 10-40 parts of coal ash, 5-20 parts of calcium lactate, 5-40 parts of calcium chloride and 1-10 parts of rubber powder. Performance of the waterproof material can completely meet requirements of GB 18445-2001 standards, and contents of Na2O and K2O of the water-proof material are lower than 1%, so that the material is more suitable for waterproof and moisture-proof treatment of buildings and constructions and has using value in industries.

Description

technical field [0001] The invention relates to a waterproof material in the field of building materials, in particular to an alkali-free cement-based permeable crystalline waterproof material and its application as a water-proofing agent in concrete. Background technique [0002] Concrete is a loose and porous mixture. Therefore, leakage problems are often encountered during the use of concrete, that is, water penetrates through the irregular cracks formed by various reasons in the concrete structure, and then large-scale wetness and leakage occur, which greatly affects The performance of the building function may endanger the safety of the structure. Although the use of materials such as coils and coatings can achieve a certain degree of treatment effect, there are problems such as high material costs, short service life, and complicated maintenance methods. In the face of this industry problem, after a lot of research, it has been found that cement-based permeable crysta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B28/04C04B28/06C04B111/27
Inventor 周庆王海龙张孟霞赵霄龙冷发光张文会霍胜旭
Owner 北京建研昆仑科技有限公司