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Fiber-reinforced concrete for rapid repair of airport pavement, preparation and application

A fiber reinforced concrete and concrete technology, applied in the field of concrete, can solve the problems of poor airport pavement, and achieve the effects of high early strength, high later volume stability and high durability

Inactive Publication Date: 2019-10-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These research results may have met the requirements for the rapid repair of some highway pavement, but not for the airport pavement, because the airport must complete the repair work and restore the pavement within 5-6 hours of nighttime suspension

Method used

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  • Fiber-reinforced concrete for rapid repair of airport pavement, preparation and application
  • Fiber-reinforced concrete for rapid repair of airport pavement, preparation and application
  • Fiber-reinforced concrete for rapid repair of airport pavement, preparation and application

Examples

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Embodiment

[0025] Numbers 2, 3, and 4 are examples, and number 1 is a comparative example.

[0026] The typical material mix ratios used in each embodiment and the comparative example are listed in Table 1.

[0027] Table 1 Example Mixing Ratio

[0028]

[0029]

[0030] A detailed description of the materials used in Table 1:

[0031] The cement used has a specific surface area of ​​480m 2 / kg of BS-HFR42.5 high Belite sulphoaluminate cement.

[0032] The sand is ordinary medium sand, the maximum particle size is not more than 2.5 mm, and the fineness modulus is 2.5.

[0033] The water used meets the requirements of "Water Standard for Concrete" JGJ 63-06. The quality of water in Table 1 is the quality of the water contained in the water reducing agent.

[0034] The stones are ordinary melon stones of 5-10 mm.

[0035] The polyvinyl alcohol fiber used has a diameter of 45μm, a length of 12mm, and a density of 1.3×10 3 kg / m 3 .

[0036] The water-reducing agent used is a high-efficiency composite wate...

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Abstract

The invention relates to fiber concrete for quick repair of an airfield pavement, preparation and an application and belongs to the technical field of concrete. The weight of high-belite sulphate aluminum cement accounts for 16.0-20.0% of the total weight of a repair material; the weight of sand accounts for 21.5-34.1% of the total weight of the repair material; the weight of gravel accounts for 42.7-55.3% of the total weight of the repair material; a water-cement ratio is 0.31-0.42; a polyvinyl alcohol fiber is 12-15mm in length and 45 micrometers in diameter; the volume of the polyvinyl alcohol fiber accounts for 0.6-1.0% of the total volume of the repair material; and an effective solid mixing amount of a water reducer is 0.12-0.19% of the mass of the high-belite sulphate aluminum cement. A preparation method comprises the steps of pouring a cementing material and the sand in raw materials into a stirrer for uniform stirring, slowly pouring a mixed solution of the water reducer and the water into the stirrer, adding the polyvinyl alcohol fiber after a mixture is changed into colloid from a particle, and performing quick casting after uniform dispersion. The fiber concrete can be used for the quick repair of the broken airfield pavement.

Description

Technical field [0001] The invention relates to a fiber concrete for rapid repair of airport pavement, which belongs to the technical field of concrete and is mainly applied to the rapid repair of airport pavement concrete. Background technique [0002] In recent years, due to the rapid development of China’s civil aviation industry, the construction and maintenance tasks of airport pavements have become more and more onerous. Pavements are the most important infrastructure in the airport flight area and are responsible for important tasks such as aircraft take-off and landing, taxiing and parking. It is the basic platform on which the functions of the airport can be fully utilized. However, due to the repeated effects of load factors and environmental factors, the pavement structure will gradually be damaged during use, such as various fractures of the cement concrete pavement, broken slabs, broken joints, damaged joints, repaired damage, etc. Affect the service performance of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B111/72
CPCC04B28/06C04B2111/00982C04B2111/72C04B2201/05C04B14/06C04B14/02C04B16/0641C04B2103/302
Inventor 邓宗才张鑫
Owner BEIJING UNIV OF TECH
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