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Thiophosphate cement

A technology of thiophosphate and dihydrogen phosphate, applied in the field of cementitious materials, can solve the problems of restricting the popularization and application of repair materials, consumption of large dihydrogen phosphate, high price, etc., and achieve comprehensive utilization of waste, strong water resistance, Long service life effect

Inactive Publication Date: 2013-02-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, magnesium phosphate cement must use dead-burned magnesia that has been calcined at a high temperature above 1200°C, which consumes a lot of energy and consumes a large amount of dihydrogen phosphate, resulting in high prices, which seriously restricts the popularization and application of this repair material. It can reduce the amount of dead-burned magnesia, reduce the amount of dihydrogen phosphate, and reduce costs and project costs. The repair material with magnesium phosphate cement as the main cementitious material will have a large market, and the application prospect is very promising

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  • Thiophosphate cement

Examples

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Embodiment 1

[0027] Example 1 Thiophosphate cement, which is made of the following raw materials with a particle size of 1-100 μm, which are uniformly mixed in a mixer, and packed in bags of 50 kg per bag: 31 parts of dead-burned magnesium oxide; 27 parts of hydrogen salt; 3 parts of coagulation regulator; 25 parts of light-burned magnesium oxide; 7 parts of sulfur-containing components; 8 parts of industrial waste powder.

[0028] Among them: heavy-burned magnesia is magnesia powder material made from calcined magnesite, dihydrogen phosphate is potassium dihydrogen phosphate, coagulation regulator is borax, light-burned magnesia is active magnesium oxide prepared by calcined magnesite method Magnesium oxide powder material, the sulfur component is concentrated sulfuric acid with a concentration of 98%, and the industrial waste powder is fly ash.

Embodiment 2

[0029] Example 2 Thiophosphate cement, which is made of the following raw materials with a particle size of 1-100 μm, which are uniformly mixed in a mixer, and packed in bags of 50 kg / bag: 24 parts of dead-burned magnesium oxide; 16 parts of hydrogen salt; 3 parts of coagulation regulator; 36 parts of light-burned magnesium oxide; 3 parts of sulfur-containing components; 18 parts of industrial waste powder.

[0030] Among them: heavy-burned magnesia is the by-product magnesia of salt lake lithium carbonate, which refers to the by-product magnesia powder material produced in the process of extracting lithium carbonate from salt lake brine, dihydrogen phosphate is ammonium dihydrogen phosphate, coagulation regulator is boric acid, light Burnt magnesia is an active magnesia powder material prepared by partial pyrolysis of bischofite. The sulfur-containing component is magnesium sulfate monohydrate, and the industrial waste powder is slag.

Embodiment 3

[0031] Example 3 Thiophosphate cement, which is made of the following raw materials with a particle size of 1-100 μm, which are uniformly mixed in a mixer, and packed in bags of 50 kg per bag: 40 parts of dead-burned magnesium oxide; 30 parts of hydrogen salt; 2 parts of coagulation regulator; 15 parts of light-burned magnesium oxide; 2 parts of sulfur-containing components; 8 parts of industrial waste powder.

[0032] Among them: dead-burned magnesia is a mixture of magnesia powder material made of calcined magnesite and by-product magnesia powder material produced in the process of extracting lithium carbonate from salt lake brine in a weight ratio of 1:1, phosphoric acid The dihydrogen salt is sodium dihydrogen phosphate, the coagulation regulator is a mixture of boric acid and borax in a weight ratio of 1:1, and the light-burned magnesia is bischofite-activated magnesia powder prepared by pyrolysis method The material, the sulfur component is magnesium sulfate heptah...

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Abstract

The invention relates to thiophosphate cement. The thiophosphate cement is prepared from 4 to 60 parts by weight of heavy-calcined magnesia, 3 to 50 parts of one or more dihydric phosphates, 1 to 6 parts by weight of one or more solidification adjustment agents, 8 to 36 parts by weight of light-calcined magnesia, 1 to 10 parts by weight of one or more sulphur-containing components and 1 to 20 parts by weight of industrial waste residue powder. The thiophosphate cement has the advantages of optionally adjustable coagulation time of a few minutes to a few hours, high early strength, high strength, high bonding strength, no reduction of later strength, micro-dilatation, and fast coagulation hardening at a low temperature. The thiophosphate cement is convenient for construction, is suitable for emergency repair of engineering structure defects of buildings, bridges, roads, airports, tunnels, dams and canals, can be used for cemented gravels, industrial waste residues and lightweight aggregate, can be used for preparation of building material products such as building mortar, concrete bricks and building blocks, thermal insulation wallboards and thermal insulation roofs, and has wide application prospects in the fields of nuclear waste, municipal waste and sludge treatment, eco-environment protection and bioengineering.

Description

technical field [0001] The invention relates to a cementitious material in the technical fields of construction engineering and traffic engineering, in particular to a sulfur-phosphate cement. Background technique [0002] Buildings, bridges, roads, airports, tunnels, dams, canals and other engineering structures often suffer from chemical corrosion, freeze-thaw cycles, wear and erosion damage, impact and impact damage, earthquake action, explosion action, etc. during long-term use. For damage phenomena such as surface peeling and structural cracking caused by durability factors or sudden disaster factors, it is an important task in the fields of civil engineering, traffic engineering, hydraulic engineering, etc. Task. At present, in addition to polymer building structural adhesives, common emergency repair materials use a large number of cement repair materials based on inorganic materials. For example, Chinese invention patent application 200510011234.7 discloses a quick...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/02
Inventor 余红发陆昊麻海燕李成栋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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