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Phosphate cement based patching material and preparation method thereof

A technology for repairing materials and magnesium phosphate cement, applied in the field of phosphate cement-based repairing materials and their preparation, can solve the problems of short setting time and difficult adjustment, delay the hydration process, solve the limited effect of setting retardation, and improve water resistance. sexual effect

Inactive Publication Date: 2017-08-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical properties, wear resistance, waterproof and impermeability and durability of the repair material all meet the application requirements, but the initial setting time is only 8-14 minutes, and there is a problem that the setting time is too short and difficult to control

Method used

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  • Phosphate cement based patching material and preparation method thereof
  • Phosphate cement based patching material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A phosphate cement-based repair material, which consists of the following components in parts by weight: 100 parts of magnesium phosphate cement, 20 parts of fly ash, 120 parts of aggregates, 0.5 parts of water glass, and polypropylene fibers (average length 12mm) 0.5 part, 20 parts water. Among them, magnesium phosphate cement is composed of 60% magnesium oxide, 37% potassium dihydrogen phosphate, 3% composite retarder by mass percentage (composite retarder is composed of 40% borax, 40% dodecahydrate disodium hydrogen phosphate and 20% anhydrous calcium chloride, all three are analytically pure) mixed.

[0027] The phosphate cement-based repair material is prepared through the following steps: weighing magnesium oxide, potassium dihydrogen phosphate, and a composite retarder in the above proportions and mixing them evenly to obtain magnesium phosphate cement, then adding mineral admixtures according to the proportions, collecting After mixing evenly, add water glass, ...

Embodiment 2

[0030]A phosphate cement-based repair material, which consists of the following components in parts by weight: 100 parts of magnesium phosphate cement, 25 parts of fly ash, 125 parts of aggregates, 0.8 parts of water glass, and polypropylene fibers (average length 12mm) 1 part, 25 parts water. Among them, magnesium phosphate cement is composed of 66% magnesium oxide, 30% potassium dihydrogen phosphate, 4% composite retarder by mass percentage (composite retarder is composed of 40% borax, 40% dodecahydrate disodium hydrogen phosphate and 20% anhydrous calcium chloride, all three are analytically pure) mixed.

[0031] The phosphate cement-based repair material is prepared by the following steps: weighing magnesium oxide, potassium dihydrogen phosphate, and a composite retarder in the above proportions and mixing them evenly to obtain magnesium phosphate cement, and then adding minerals according to the proportion to mix After mixing evenly, add water glass, fiber and water and ...

Embodiment 3

[0033] A phosphate cement-based repair material, which is composed of the following components in parts by weight: 100 parts of magnesium phosphate cement, 40 parts of fly ash, 140 parts of aggregate, 1 part of water glass, polyvinyl alcohol fiber (average length 12mm) ) 0.5 parts, 28 parts of water. Among them, magnesium phosphate cement is composed of 56% magnesium oxide, 40% potassium dihydrogen phosphate, 4% composite retarder by mass percentage (composite retarder is composed of 40% borax, 40% dodecahydrate disodium hydrogen phosphate and 20% anhydrous calcium chloride, all three are analytically pure) mixed.

[0034] The phosphate cement-based repair material is prepared by the following steps: weighing magnesium oxide, potassium dihydrogen phosphate, and a composite retarder in the above proportions and mixing them evenly to obtain magnesium phosphate cement, and then adding minerals according to the proportion to mix After mixing evenly, add water glass, fiber and wat...

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Abstract

The invention relates to a phosphate cement based patching material and a preparation method thereof. The patching material is prepared from the following ingredients in parts by weight: 100 parts of magnesium phosphate cement, 20 to 40 parts of mineral admixtures, 120 to 140 parts of fine aggregates, 0.5 to 1 part of water glass, 0.5 to 1 part of fiber and 20 to 30 parts of water. The preparation method is characterized in that the raw materials are proportionally weighed; magnesium oxide, monopotassium phosphate and composite retarders are firstly stirred and mixed; then, the magnesium phosphate cement is obtained; then, the mineral admixtures and the fine aggregates are added; after uniform stirring, the water glass, the fiber and the water are added; stirring is performed for 3 to 4 minutes by a stirring machine; the phosphate cement based patching material is obtained. The prepared phosphate cement based patching material by the invention has the advantages that the coagulation time is about 30 minutes; the restoration time is short; the construction is not influenced; the restoration effect is obvious; the application requirement of fast patching the damaged road surface is met; the phosphate cement based patching material is applicable to fast restoration projects of cement concrete pavements.

Description

technical field [0001] The invention belongs to the technical field of cement concrete pavement repair, and particularly relates to a phosphate cement-based repair material and a preparation method thereof. Background technique [0002] Nowadays, with the rapid development of economic construction, the transportation industry has also developed vigorously. Because the cement concrete pavement itself has high strength, high stiffness, good volume stability, excellent load diffusion capacity, durability, etc. , making cement concrete pavement occupy a great proportion in highway construction. However, its brittleness and easy cracking also bring many troubles to the normal traffic and maintenance of concrete pavement. Under the influence of repeated loads of vehicles and environmental factors, small diseases such as cracks, exposed surfaces, and pockmarked surfaces begin to appear in cement concrete. If not treated in time, it may lead to more serious structural damage, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34C04B22/16C04B111/72C04B103/22
CPCC04B28/34C04B40/0039C04B2103/22C04B2111/0075C04B2111/72C04B2201/50C04B12/04C04B18/08C04B16/0633C04B14/06C04B16/0641C04B22/0013C04B22/16C04B22/124
Inventor 谭洪波尹轮李相国刘卓霖杨蓉明添笪俊伟
Owner WUHAN UNIV OF TECH
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