A hybrid fiber high crack resistance high toughness airport pavement concrete and its preparation method

A technology of mixing fiber and concrete, which is applied in the field of concrete, can solve the problems of poor fiber dispersion and achieve the effects of improving durability, increasing bending toughness, and increasing safety and reliability

Active Publication Date: 2018-02-27
北京中企卓创科技发展有限公司 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

Therefore, the inventor found that the problem of poor fiber dispersion can be effectively improved by controlling the amount of fiber, the order of fiber incorporation, and the amount of high-efficiency polycarboxylate water reducer.

Method used

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  • A hybrid fiber high crack resistance high toughness airport pavement concrete and its preparation method
  • A hybrid fiber high crack resistance high toughness airport pavement concrete and its preparation method
  • A hybrid fiber high crack resistance high toughness airport pavement concrete and its preparation method

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Embodiment 1

[0021] Table 1 Example mix ratio

[0022] The materials used in Table 1 are described in detail:

[0023]

[0024] The grade of ordinary Portland cement used is PO.42.5.

[0025] The sand is construction sand, the particle gradation is 2-gradation area, and the fineness modulus is 2.7.

[0026] 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.

[0027] The stones are limestone crushed stones, using synthetic gradation, including three particle sizes ranging from (5-10) mm, (10-20) mm, (20-31.5) mm, and the particle size of the stones is from small to large. The mass ratio is 3:9:8.

[0028] The thick polyvinyl alcohol fibers used have a diameter of 1 mm, a length of 38 mm, and a density of 0.91×10 3 kg / m 3 .

[0029] The diameter of the fine polyethylene fibers used is 12 μm, the length is 12 mm; the density is 1.3×1...

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Abstract

The invention relates to a hybrid fiber high-crack-resistant high-toughness airport pavement concrete and a preparation method thereof, which belong to the technical field of concrete. Its raw material components include ordinary Portland cement, water, sand, stones, polyvinyl alcohol fibers, coarse polyolefin fibers, and water reducers. When preparing, first pour stones, sand, cement, and coarse polyolefin fibers into the mixture and stir evenly, then pour the mixture of water reducer and water into the mixer, and when the mixture changes from granular to colloidal, add The polyvinyl alcohol fiber is stirred, and the test block is poured and maintained after the fiber is evenly dispersed. The invention can significantly improve the crack resistance and toughness of cement concrete, improve the durability of civil aviation airport pavement in my country, help to comprehensively improve the structural quality of airport pavement, prolong the service life, and save a lot of maintenance and reconstruction costs for the country.

Description

technical field [0001] The invention relates to a hybrid fiber high-crack-resistant high-toughness airport pavement concrete and a preparation method thereof, which belong to the technical field of concrete and are used to improve the problems of poor durability and short service life of civil aviation airport pavement in my country. Background technique [0002] In order to ensure flight safety and normal use, the airport pavement should not only have sufficient bearing capacity, but also have good weather stability, impact resistance, toughness, shrinkage resistance, crack resistance, fatigue and other properties. At present, most cement concrete airport pavements in my country cannot reach the design life of 30 years. The average service life is generally 15 to 20 years, and some pavement failures even occur 2 to 3 years after new construction. Phenomena such as early corner breaks, broken boards, and dropped edges and corners of the pavement lead to a large amount of FOD...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/06C04B16/06
Inventor 刘岩邓宗才耿雪辉王辉
Owner 北京中企卓创科技发展有限公司
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