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Potassium magnesium phosphate cement

A potassium magnesium phosphate cement and sodium tripolyphosphate technology, applied in the field of cement, can solve the problems of large heat release of hydration, easy formation of cracks, high thermal expansion coefficient, etc., achieve less cracks and defects, improve shrinkage performance, and compact crystal packing Effect

Inactive Publication Date: 2016-02-24
鲁绍荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the thermal expansion coefficient of the prior art potassium magnesium phosphate cement is high, and the heat of hydration is large at the same time, and cracks are easily formed after the cement is solidified.

Method used

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  • Potassium magnesium phosphate cement
  • Potassium magnesium phosphate cement

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Effect test

Embodiment 1

[0034] A kind of potassium magnesium phosphate cement, including 34% KH 2 PO 4 , 49% MgO, 7.2% Al (H 2 PO 4 ) 3 , 4.9% glass fiber, 1% potassium ethylene diamine tetramethylene phosphonate, 1.2% phosphoric acid monoester coupling agent, 0.4% sodium tripolyphosphate and 1.3% sodium ethylene diamine tetramethylene phosphonate.

Embodiment 2

[0036] A kind of potassium magnesium phosphate cement, including 40% KH 2 PO 4 , 43% MgO, 8.8% Al (H 2 PO 4 ) 3 , 3.3% glass fiber, 1.8% potassium ethylenediamine tetramethylene phosphonate, 0.4% phosphate monoester coupling agent, 0.8% sodium tripolyphosphate and 0.9% ethylenediamine tetramethylene phosphonate sodium.

[0037] The particle size of the magnesium oxide particles is 86 μm, and the specific surface area of ​​the magnesium oxide particles is 1737 cm 2 / g.

[0038] The particle size of the potassium dihydrogen phosphate particles is 130 μm, and the specific surface area of ​​the potassium dihydrogen phosphate is 2110 cm 2 / g.

[0039] The particle size of the aluminum dihydrogen phosphate particles is 90 μm, and the specific surface area of ​​the aluminum dihydrogen phosphate is 2320 cm 2 / g.

Embodiment 3

[0041] A kind of potassium magnesium phosphate cement, including 37% KH 2 PO 4 , 46% MgO, 9% Al (H 2 PO 4 ) 3 , 4.1% glass fiber, 1.4% potassium ethylene diamine tetramethylene phosphonate, 0.8% phosphate monoester coupling agent, 0.6% sodium tripolyphosphate and 1.1% ethylene diamine tetramethylene phosphonate sodium.

[0042] The particle size of the magnesium oxide particles is 86 μm, and the specific surface area of ​​the magnesium oxide particles is 1737 cm 2 / g.

[0043] The particle size of the potassium dihydrogen phosphate particles is 130 μm, and the specific surface area of ​​the potassium dihydrogen phosphate is 2110 cm 2 / g.

[0044] The particle size of the aluminum dihydrogen phosphate particles is 90 μm, and the specific surface area of ​​the aluminum dihydrogen phosphate is 2320 cm 2 / g.

[0045] Glass fiber is nano TiO 2 / Micron composite glass fiber, nano / micron TiO 2 The glass fiber has a layered structure, including TiO 2 Porous coating formed on the surface of gla...

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Abstract

The invention discloses potassium magnesium phosphate cement and belongs to the field of cement. The potassium magnesium phosphate cement is prepared from 34-40% of KH2PO4, 43-49% of MgO, 7.2-8.8% of Al(H2PO4)3, 3.3-4.9% of glass fibers, 1-1.8% of ethylenediamine tetramethylenephosphonic acid potassium salt, 0.4-1.2% of a phosphomonoester coupling agent, 0.4-0.8% of sodium triphosphate and 0.9-1.3% of EDTMPS. The potassium magnesium phosphate cement has the advantages that the heat expansion coefficient is low, and formed cracks are reduced after curing.

Description

Technical field [0001] The invention relates to a cement, in particular to a potassium magnesium phosphate cement. Background technique [0002] Potassium magnesium phosphate cement is made of dead burnt magnesium oxide and soluble phosphate, chemical additives and mineral admixtures in a certain proportion, under acidic conditions through acid-base chemical reaction and physical action to produce inorganic glue with phosphate as the binding phase. Coagulation material. This type of material is combined by chemical bonds at room temperature, and has the main characteristics of silicate cementitious materials and ceramic materials, that is, low temperature curing, high early strength, high volume stability, strong adhesion, neutrality of the hardened body and Good durability, etc. [0003] However, the prior art potassium magnesium phosphate cement has a relatively high thermal expansion coefficient and a large amount of heat of hydration, and cracks are easily formed after the ce...

Claims

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Application Information

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IPC IPC(8): C04B12/02
Inventor 鲁绍荣
Owner 鲁绍荣
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