Iron phosphate cement

A technology of phosphate cement and acid phosphate, which is applied in the field of building materials, can solve the problems of unfavorable high temperature and large-area construction, the difficulty of effectively controlling the setting time, and restrictions on the popularization and application of cementitious materials, etc. Strong construction and good strength and stability in the later stage

Inactive Publication Date: 2014-12-03
KUNMING UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

[0003] For the preparation of magnesium phosphate cement, the main raw material is magnesia, which has a high cost. In addition, in order to control the reactivity of magnesia to slow down its solidification speed, it is usually necessary to use dead-burned magnesia calcined at a high temperature of 1200 ° C, which consumes a lot of energy. , even so, the setting time is still difficult to control effectively, the construction performance is poor, and the material has high heat release, which is not conducive to high temperature and large-area construction. Therefore, in order to achieve a suitable setting speed, it is necessary to add a certain amount of borate retarder. The cost of the entire preparation process is too high, which seriously restricts the popularization and application of this type of gelling material

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Embodiment 1

[0023] The iron-based phosphate cement in this embodiment is made by uniformly mixing the following raw materials with a particle size of 1-100 μm. Each raw material and its content are: 100 parts by weight of acid phosphate and 400 parts by weight of iron-rich waste residue. 3 parts by weight of the setting material, 30 parts by weight of other industrial waste residues, and 15 parts by weight of water.

[0024] The acid phosphate described in this example is disodium hydrogen phosphate, the setting material is borax, and other industrial waste residues are fly ash (the content of the main component is SiO 2 48.96%, Al 2 O 3 30.13%, CaO4.81%), copper slag rich in iron oxide (the main component content is SiO 2 32.36%, Al 2 O 3 3.13%, FeO35.68%, CaO6.8%).

[0025] The preparation process of the iron-based phosphate cement described in this embodiment: pulverize the waste copper slag to a 180-mesh sieve of no more than 10%, weigh the disodium hydrogen phosphate and the waste copp...

Embodiment 2

[0028] The iron-based phosphate cement in this embodiment is made by uniformly mixing the following raw materials with a particle size of 1-100 μm. Each raw material and its content are: 100 parts by weight of acid phosphate and 500 parts by weight of iron-rich waste residue. The setting material is 4 parts by weight, other industrial wastes are 20 parts by weight, and the water is 40 parts by weight.

[0029] The acid phosphate described in this embodiment is a mixture of sodium dihydrogen phosphate, diammonium hydrogen phosphate, and dipotassium hydrogen phosphate in a ratio of 1:1:1. The setting material is borax, and other industrial waste residues are phosphorus slag ( The main component is SiO 2 41.08%, CaO47.60%, Al 2 O 3 4.13%), copper slag rich in iron oxide (the main component content is SiO 2 32.36%, Al 2 O 3 3.13%, FeO35.68%, CaO6.8%).

[0030] The preparation process of the iron-based phosphate cement described in this embodiment: pulverize the waste copper slag to...

Embodiment 3

[0033] The iron-based phosphate cement in this embodiment is made by uniformly mixing the following raw materials with a particle size of 1-100 μm. Each raw material and its content are: 100 parts by weight of acid phosphate and 600 parts by weight of iron-rich waste residue. The setting material is 4.5 parts by weight, other industrial waste is 20 parts by weight, and water is 60 parts by weight.

[0034] The acid phosphate in this embodiment is potassium dihydrogen phosphate; the setting material is boric acid; other industrial waste slag is steel slag (the content of the main component is SiO 2 15.34%, Al 2 O 3 5.16%, CaO43.22%); waste slag rich in iron oxide copper slag (the main component content is SiO 2 32.36%, Al 2 O 3 3.13%, FeO35.68%, CaO6.8%).

[0035] The preparation process of the iron-based phosphate cement described in this embodiment: Grind the waste copper slag to a 180-mesh sieve of no more than 10%, weigh the potassium dihydrogen phosphate and the waste copper...

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Abstract

The invention discloses an iron phosphate cement, belonging to the technical field of building materials. The cementing material is prepared by uniformly mixing the following raw materials with the particle size of 1-100 mu m in parts by weight: 100 parts of acid phosphate, 400-800 parts of waste residue containing rich iron oxides, 3-6 parts of coagulation regulating material, 10-30 parts of other industrial waste residues and 15-200 parts of water. The iron phosphate cement has the advantages of adjustable setting time (several minutes to several hours), quick hardening, high strength, high binding property, no reduction of later strength, and the like, and can be quick hardened at normal temperature. The iron phosphate cement is simple in preparation technique, has high constructability, is suitable for quick emergency repair of defects of roads, airport pavements, bridges, tunnels, cooking ranges, dams, ditches and other engineering structures, and has wide application prospects in curing of high-risk waste residues containing rich radioelements, heavy metal elements, arsenic and the like.

Description

Technical field [0001] The invention relates to an iron-based phosphate cement, which belongs to the technical field of building materials. Background technique [0002] Phosphate cement is a kind of cementitious material system obtained by chemical reaction of alkaline earth metal oxide and phosphoric acid or acid phosphate. The more mature research is magnesium phosphate cement, also known as chemically bonded magnesium phosphate ceramics. , Usually prepared from acid phosphates such as ammonium dihydrogen phosphate, potassium dihydrogen phosphate, magnesium oxide powder, retarders and admixtures, etc., which can react quickly in an aqueous medium to form a ceramic-like structure; It has excellent properties such as high strength, fast setting, salt and frost resistance, abrasion resistance and acid corrosion resistance. It is suitable for rapid repair of roads, airports, high-temperature furnaces, etc. [0003] For the preparation of magnesium phosphate cement, the main raw mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/02
Inventor 周新涛罗中秋刘守庆郝旭涛
Owner KUNMING UNIV OF SCI & TECH
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