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Magnesium phosphate cement grout material

A technology of magnesium phosphate cement and grouting material, which is applied in the field of building materials engineering, can solve the problems of large shrinkage of grouting material, loss of prestress, difficulty in normal hydration, etc., and achieves reduced project cost, fast early hardening, and good corrosion resistance Effect

Inactive Publication Date: 2012-08-22
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional grouting materials with portland cement as the main raw material have large shrinkage, long setting time, and difficulty in normal hydration at negative temperatures
The above shortcomings can cause cracking, hollowing, loss of prestress and delay of construction period after grouting

Method used

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  • Magnesium phosphate cement grout material

Examples

Experimental program
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Effect test

Embodiment 1

[0016] A magnesium phosphate cement grouting material is prepared from the following components in parts by weight: 100 parts of phosphate, 100-400 parts of metal oxide, 5-150 parts of fly ash, 5-150 parts of ground slag, and coagulation regulator 10-100 parts, water 26-300 parts; according to the above ratio, mix phosphate, metal oxide, fly ash, ground slag and coagulant evenly, then add water and stir evenly to obtain magnesium phosphate cement grouting material.

[0017] Among them, phosphate is an industrial product, and the mass percentage purity is not less than 96%. The metal oxide is perburned magnesium oxide, and its mass percent purity is not less than 88%. Fly ash is one or a mixture of Class I ash, Class II ash or high calcium ash. The finely ground slag is one or a mixture of grades S105, S95 or S75. The coagulant is borax, which is an industrial product, and its mass percentage purity is not less than 98%. Phosphate is one or a mixture of ammonium dihydrog...

Embodiment 2

[0019] A magnesium phosphate cement grouting material is prepared from the following components in parts by weight: 100 parts of sodium dihydrogen phosphate, whose mass percent purity is 98%; 400 parts of overburned magnesium oxide, whose mass percent purity is 90%; 5 parts of ash; 5 parts of S95 grade finely ground slag; 48 parts of borax with a mass percent purity of 98%; 65 parts of water, in parts by weight. Mix burnt magnesium oxide, sodium dihydrogen phosphate, borax, fly ash and finely ground slag evenly according to the above ratio, put them into a mixer, add water and stir thoroughly to obtain magnesium phosphate cement grouting material.

Embodiment 3

[0021] A magnesium phosphate cement grouting material is prepared from the following components in parts by weight: 50 parts of sodium dihydrogen phosphate, whose mass percent purity is 99%; 50 parts of calcium dihydrogen phosphate, whose mass percent purity is 99%; overburned magnesium oxide 200 parts, its mass percent purity is 92%; 150 parts of Class II fly ash, 10 parts of S95 grade finely ground slag; 40 parts of borax, its mass percent purity is 99%; 58.5 parts of water are prepared in parts by weight. Mix burnt magnesium oxide, sodium dihydrogen phosphate, calcium dihydrogen phosphate, borax, fly ash, and finely ground slag evenly according to the above ratio, put them into a mixer, add water and stir thoroughly to obtain magnesium phosphate cement grouting material.

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PUM

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Abstract

The invention discloses a magnesium phosphate cement grout material, which belongs to the technical field of building materials. The magnesium phosphate cement grout material is prepared through the following components, parts by weight, 100 parts of phosphate, 100-400 parts of metal oxide, 5-150 parts of coal ash, 5-150 parts of grounded slag, 10-100 parts of thickening time control agent and 26-300 parts of water. According to the proportion, the metal oxide, the phosphate, the thickening time control agent, the coal ash and the grounded slag are mixed evenly and placed in a blender, water is added and the mixture is stirred evenly, and the magnesium phosphate cement grout material is obtained. The grout material has the advantages of being good in volume stability, large in flowing degree, indehiscent, high in early-stage strength, capable of constructing under the negative temperature and the like.

Description

technical field [0001] The invention belongs to the technical field of building material engineering, and in particular relates to a magnesium phosphate cement grouting material. technical background [0002] During the building construction process, the anchor bolt holes of the construction machinery, the equipment foundation and the post-tensioned prestressed steel bars all need to be grouted. The traditional grouting materials with Portland cement as the main raw material have large shrinkage, long setting time, and difficulty in normal hydration at negative temperatures. The above shortcomings can cause cracking, hollowing, loss of prestress and delay of construction period after grouting. Contents of the invention [0003] The invention makes up for the deficiency of the traditional grouting material and provides a magnesium phosphate cement grouting material. The grouting material has the characteristics of good volume stability, fast early hardening, high strength...

Claims

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Application Information

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IPC IPC(8): C04B28/34C04B14/30C04B18/30C04B22/08
CPCY02W30/91
Inventor 李中华苏超郑铎杨金良张佳良
Owner HOHAI UNIV
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