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Patching material in ultra-tast for hard road

A technology of road repairing and repairing materials, applied in the direction of roads, roads, sustainable waste treatment, etc., can solve the problems of low bonding strength, low bonding strength, and high price

Inactive Publication Date: 2003-05-07
HANGZHOU ROADMENDER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the first type of material is cheap and matches the material properties of old concrete such as thermal expansion coefficient and elastic modulus, it has the disadvantages of low bond strength and slow setting and hardening; the second type of material is just the opposite, although setting and hardening is fast, The bonding strength is high, but the price is high, and it does not match the material properties of the old concrete, such as thermal expansion coefficient and elastic modulus, and is easy to age; the third type of materials such as sulphoaluminate cement and high alumina cement, although the setting and hardening time, price and The performance is between the first two types, but the bond strength is still not high, and the volume stability is not very good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The mixing ratio of the repairing material is (percentage by weight):

[0045] Magnesium oxide (specific surface area is 200m 2 / kg) 70.25%

[0046] Ammonium dihydrogen phosphate 22.75%

[0047] Borax 5%

[0048] Fly Ash 0%

[0049] Sodium metapolyphosphate 2%

[0050] When the repair material: water: sand = 1:0.17:1, the flexural and compressive strengths were 7.8MPa and 58.7MPa in 1 hour, 10.8MPa and 77.6MPa in 7 days, and the setting time was about 20 minutes.

Embodiment 2

[0052] The mixing ratio of the repairing material is (percentage by weight):

[0053] Magnesium oxide (specific surface area is 200m 2 / kg) 57%

[0054] Ammonium dihydrogen phosphate 19%

[0055] Borax 4%

[0056] Fly Ash 20%

[0057] Sodium metapolyphosphate 0%

[0058] When the repair material: water: sand = 1:0.13:1, the flexural and compressive strengths were 7.7MPa and 60.5MPa in 1 hour, 10.2MPa and 78.4MPa in 7 days, and the setting time was about 24 minutes.

Embodiment 3

[0060] The mixing ratio of the repairing material is (percentage by weight):

[0061] Magnesium oxide (specific surface area is 200m 2 / kg) 49.1%

[0062] Ammonium dihydrogen phosphate 16.4%

[0063] Borax 3.5%

[0064] Fly Ash 30%

[0065] Sodium metapolyphosphate 1%

[0066] When the repair material: water: sand = 1:0.12:1, the flexural and compressive strengths were 6.6MPa and 52.3MPa in 1 hour, 10.2MPa and 74.6MPa in 7 days, and the setting time was about 22 minutes.

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Abstract

An ultrafastly hardening reparing material for concrete engineering (such as road) is prepared from magnesium oxide, fly ash, ammonium dihydrogen phosphate, and borax through proportional mixing. Its advantages are fast hardening, and high adhesion and volume stability.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an ultra-fast and hard road repair material, which can be widely used in rapid repair of concrete in projects such as roads, highways, airport runways, bridges, ports and docks. technical background [0002] Since the 1980s, with the rapid development of my country's economy, the scale of infrastructure construction, especially the infrastructure construction with reinforced concrete as the main material, has been expanding day by day. In recent years, it has been found that concrete damage in civil engineering such as roads, bridge decks, ports, docks, airports, and buildings has been increasing, resulting in huge direct and indirect economic losses. In addition to the harsher environmental conditions and the poor durability of concrete during design, the reasons are also related to factors such as insufficient construction management, blind pursuit of pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B28/34
CPCC04B28/34C04B2111/0075C04B2111/72C04B28/105Y02W30/91C04B18/08C04B22/16C04B22/0013C04B14/304C04B22/062
Inventor 杨全兵吴学礼杨钱荣朱蓓蓉张树青
Owner HANGZHOU ROADMENDER TECH CO LTD
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