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Phosphate fast repairing building material

A technology of building materials and phosphates, applied in the field of construction engineering, can solve the problems of further improvement of anti-aging properties, low cohesive force, and unguaranteed later strength.

Inactive Publication Date: 2009-03-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the various types of quick repair materials mentioned above, they are currently sold on the market and have shown certain effects in the project, but there are still some deficiencies, such as inorganic materials, the adhesion between them and the old concrete is not enough High and later strength can not be guaranteed; organic, its anti-aging performance needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The components and weight percentages of the phosphate quick repair building materials in this embodiment are:

[0019] Potassium dihydrogen phosphate 30%

[0020] Magnesium oxide 15%

[0021] Borax 10%

[0022] Fly ash balance.

[0023] Weigh various raw materials according to the above-mentioned proportions, stir them fully in a mixer, and form products after they are evenly mixed, and then bag them to obtain phosphate quick repair building materials.

[0024] The prepared phosphate quick repair building materials are mixed with water and sand in the following proportions to prepare mortar. Repair materials: sand: water 1:0.5:0.25 (quality ratio), repair a damaged section and make a trial at the same time Sample and conduct a setting time test. The repaired section was opened to traffic one hour later. After one month's observation, the road was intact. The test results of the produced sample are as follows: it has solidified in 30 minutes, the compressive strength after ...

Embodiment 2

[0026] The components of the quick repair material in this embodiment and their weight percentages are:

[0027] Dihydrogen phosphate 45%

[0028] Magnesium oxide 25%

[0029] Citric acid 5%

[0030] Fly ash balance.

[0031] Weigh various raw materials in the above proportions, stir them fully in a mixer, and form products after they are evenly mixed, and then bag them to obtain phosphate quick repair building materials.

[0032] The prepared phosphate quick repair building material is mixed with water in the following ratio to prepare a mortar. The repair material: water is 1:0.20 (the mass ratio), and in a cold area (the temperature is about minus 10 degrees at the time). Repair the damaged bridge deck. The repaired bridge deck was opened to traffic one day later, and after 3 months of observation, there was no damage to the repaired bridge deck. The test results of the prepared sample are as follows: 2 hours of setting and hardening, the compressive strength of 25MPa after 1 d...

Embodiment 3

[0034] The components of the quick repair material in this embodiment and their weight percentages are:

[0035] Potassium dihydrogen phosphate 30%

[0036] Calcium oxide 5%

[0037] Boric acid 5%

[0038] Fly ash balance.

[0039] Weigh various raw materials according to the above-mentioned proportions, stir them fully in a mixer, and form products after they are evenly mixed, and then bag them to obtain phosphate quick repair building materials.

[0040] The prepared phosphate quick-repair building material and water are mixed in the following ratio to prepare a repair mortar. The repair material: water is 1:0.18 (the mass ratio), and the repair is carried out in the sewage pond of a sewage treatment plant. It was put into use 2 hours after repair, and it was observed without any cracks or damage after half a year. The test results of the prepared sample are as follows: 25 minutes of setting and hardening, the compressive strength of 10 MPa after 1 hour, the compressive strength...

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Abstract

The invention discloses a phosphate quick repairing building material, which belongs to the technical field of building engineering. The material comprises the following components in weight percentage: 30 to 45 percent of dihydric phosphate, 5 to 25 percent of metal oxide powder, 20 to 60 percent of fly ash and 5 to 10 percent of regulated-set material. In the invention, as required by the project, the consumption of the regulated- set material can be adjusted, thereby realizing the setting and hardening time from a few minutes to a few hours. The material has the advantages of high binding strength, no final strength loss and micro expansion during the setting and the hardening, and can be applied in various fields, particularly the material can still be quickly set and hardened at low temperature.

Description

Technical field [0001] The invention relates to a building material in the technical field of construction engineering, and specifically to a phosphate quick repair building material. Background technique [0002] In road and construction projects, some urgent repairs are often encountered, especially when natural disasters (such as earthquakes, floods, snow disasters, etc.) are encountered, it is more urgent. Therefore, building materials used for rapid repairs continue to appear over the years. At present, the main domestic building materials used for rapid repair are inorganic and organic. Inorganic products are mainly made of some special cements (such as high alumina cement, sulphoaluminate cement, etc.) or Portland cement accelerating agents. These quick repair materials are simple to construct, cheap, but generally low in strength and compatible with The original structure has poor adhesion. For example, Chinese Patent Publication Number: CN1654411A, patent name: A rapid c...

Claims

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Application Information

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IPC IPC(8): C04B28/34C04B18/08
CPCC04B2111/72C04B28/344Y02W30/91C04B14/303C04B14/308C04B18/08C04B22/0013C04B22/064C04B22/066C04B24/04
Inventor 陈兵陈龙珠
Owner SHANGHAI JIAO TONG UNIV
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