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Water-permeable asphalt concrete as well as preparation method and application thereof

A permeable asphalt and concrete technology, applied in the field of materials, can solve the problems of reduced water permeability coefficient and limited strength of permeable concrete, etc., and achieve the effects of excellent crack resistance, good structural strength and water permeability, high water permeability and compressive strength

Pending Publication Date: 2021-02-12
江苏新路德建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the strength of permeable concrete prepared solely by cement is limited. The addition of asphalt can significantly increase the bonding strength of the various components in the concrete, thereby improving the overall strength of the concrete, but the simple addition of asphalt tends to reduce the permeability coefficient.

Method used

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  • Water-permeable asphalt concrete as well as preparation method and application thereof
  • Water-permeable asphalt concrete as well as preparation method and application thereof
  • Water-permeable asphalt concrete as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0061] This embodiment provides a kind of preparation method of permeable asphalt concrete, and described preparation method comprises the following steps:

[0062] (1) Uniformly mix coarse aggregate, fine aggregate, fly ash, modified asphalt and 50% of water according to the formula to obtain mixed slurry a;

[0063] (2) Uniformly mix ordinary portland cement 42.5, reinforcing agent, water reducer and remaining water according to the formula to obtain mixed slurry b;

[0064] (3) Uniformly mixing the mixed slurry a obtained in step (1) with the mixed slurry b obtained in step (2) under stirring conditions to obtain the permeable asphalt concrete.

[0065] The stirring in step (3) is first stirring at 400r / min for 20min, and then uniformly at 80r / min for 45min.

[0066] In terms of parts by weight, the raw materials of permeable asphalt concrete include: 300 parts of 5-25mm continuous grade gravel, 15 parts of expanded vermiculite, 15 parts of expanded perlite, 43 parts of fl...

Embodiment 2

[0070] This embodiment provides a kind of preparation method of permeable asphalt concrete, and described preparation method comprises the following steps:

[0071] (1) Uniformly mix coarse aggregate, fine aggregate, fly ash, modified asphalt and 50% of water according to the formula to obtain mixed slurry a;

[0072] (2) Uniformly mix ordinary portland cement 42.5, reinforcing agent, water reducer and remaining water according to the formula to obtain mixed slurry b;

[0073] (3) Uniformly mixing the mixed slurry a obtained in step (1) with the mixed slurry b obtained in step (2) under stirring conditions to obtain the permeable asphalt concrete.

[0074] The stirring in step (3) is first stirring at 350r / min for 25min, and then stirring at 60r / min for 50min.

[0075] In terms of parts by weight, the raw materials of permeable asphalt concrete include: 280 parts of 5-25mm continuous grade crushed stone, 12 parts of expanded vermiculite, 18 parts of expanded perlite, 44 parts...

Embodiment 3

[0079] This embodiment provides a kind of preparation method of permeable asphalt concrete, and described preparation method comprises the following steps:

[0080] (1) Uniformly mix coarse aggregate, fine aggregate, fly ash, modified asphalt and 50% of water according to the formula to obtain mixed slurry a;

[0081] (2) Uniformly mix ordinary portland cement 42.5, reinforcing agent, water reducer and remaining water according to the formula to obtain mixed slurry b;

[0082] (3) Uniformly mixing the mixed slurry a obtained in step (1) with the mixed slurry b obtained in step (2) under stirring conditions to obtain the permeable asphalt concrete.

[0083]The stirring in step (3) is first stirring at 300r / min for 30min, and then stirring at 50r / min for 60min.

[0084] In terms of parts by weight, the raw materials of permeable asphalt concrete include: 250 parts of 5-25mm continuous grade crushed stone, 10 parts of expanded vermiculite, 20 parts of expanded perlite, 45 parts ...

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Abstract

The invention relates to water-permeable asphalt concrete and a preparation method and application thereof. The water-permeable asphalt concrete is prepared from, by weight, 200-400 parts of coarse aggregate, 20-40 parts of fine aggregate, 40-50 parts of fly ash, 80-120 parts of Portland cement, 80-120 parts of modified asphalt, 10-20 parts of enhancer, 10-20 parts of water reducing agent and 120-180 parts of water; wherein the fine aggregate comprises expanded vermiculite and / or expanded perlite; and the average particle size of the fine aggregate is 2-4mm. Through specific setting of the components of the water-permeable asphalt concrete and specific selection of the weight parts of the components, the obtained water-permeable asphalt concrete not only has excellent water permeability, but also has relatively high mechanical properties, and is suitable for pavement materials and bridge deck materials under different conditions.

Description

technical field [0001] The invention belongs to the technical field of materials and relates to a pavement material, in particular to a permeable asphalt concrete and its preparation method and application. Background technique [0002] Concrete is a brittle material with high compressive strength and relatively low tensile strength. With the development of modern construction technology, there is a higher demand for cement concrete pavement materials. [0003] Because ordinary concrete roads do not have the ability of air permeability and water permeability, the vegetation is destroyed, the city's own surface temperature and humidity adjustment capabilities are reduced, and the road is prone to water accumulation, and the safety and comfort of the road surface will be reduced after water accumulation, causing the "heat island effect" Phenomena such as "flood disasters" are not uncommon. With the acceleration of urbanization and industrialization, there are many high-rise b...

Claims

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Application Information

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IPC IPC(8): C04B28/04E01C7/26E01C11/22
CPCC04B28/04C04B2111/00284C04B2111/0075C04B2201/50E01C7/26E01C11/226C04B14/185C04B14/204C04B18/08C04B24/36C04B2103/302C04B14/42C04B14/4643
Inventor 宁志刚张玉宝唐军栾洪泽
Owner 江苏新路德建设有限公司
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