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Fiber concrete for quick repair of airfield pavement, preparation and application

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

Inactive Publication Date: 2017-09-01
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 concrete for quick repair of airfield pavement, preparation and application
  • Fiber concrete for quick repair of airfield pavement, preparation and application
  • Fiber concrete for quick repair of airfield 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 ratio that each embodiment and comparative examples adopt are listed in Table 1

[0027] Table 1 embodiment mix ratio

[0028]

[0029]

[0030] The materials used in Table 1 are described in detail:

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

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

[0033] The water used complies with the provisions of JGJ 63-06 in the "Concrete Water Standard". The quality of water in Table 1 is the quality of water after removing the water contained in the water reducer.

[0034] What described stone adopts is the common melon seed stone of 5~10mm.

[0035] The polyvinyl alcohol fibers used have a diameter of 45 μm, a length of 12 mm, and a density of 1.3×1...

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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, belongs to the technical field of concrete, and is mainly used in 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 increasingly heavy. Pavement is the most important infrastructure in the airport flight area, and it undertakes important tasks such as aircraft takeoff and landing, taxiing and parking. It is the basic platform for the full play of airport functions. 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 boards, broken joints, damaged joint fillers, repaired damage, etc. The service performance of the pavement is affected, and some...

Claims

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Application Information

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Patent Type & Authority Applications(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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