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Cold-mix semi-flexible composite pavement material and preparation method thereof

A composite pavement, semi-flexible technology, applied in the field of modern pavement engineering construction, can solve the problems of plate cracking, insufficient rigidity, short service life, etc., and achieve the effects of good low temperature deformation capacity, simple construction process and high bearing capacity

Active Publication Date: 2014-12-17
浙江固路交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional asphalt concrete pavement is mainly characterized by insufficient rigidity, prone to rutting at high temperature, and has a short service life; the cement concrete pavement is poor in flexibility, prone to damage such as plate cracking, plate breaking, and mud pumping, and expansion joints need to be installed , affecting driving comfort

Method used

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  • Cold-mix semi-flexible composite pavement material and preparation method thereof
  • Cold-mix semi-flexible composite pavement material and preparation method thereof
  • Cold-mix semi-flexible composite pavement material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Moisten 90% of the crushed stone with 1% of water by mass, add 6% of emulsified asphalt and mix well, and finally add 3% of mineral powder and fully mix to form emulsified asphalt Mixture;

[0031] The cement mortar used for grouting is mixed with dry powder mortar and water. Add water accounting for 19% of the mass percentage of cement mortar into the mixing pot of the cement mortar mixer, stir at a low speed, and then add dry powder cement mortar accounting for 81% of the cement mortar mass. Add it to the mixing pot, after the water and the dry cement mortar are evenly mixed, stir at high speed for 240 seconds;

[0032] The composition and mass ratio of dry powder mortar are: cement 46.5%, superfine quartz sand 25%, fly ash 10%, metakaolin 12%, expansion agent 6%, early strength agent 0.3%, dry powder superplasticizer 0.2%;

[0033] Pour the prepared cement mortar into the surface of the mixture, and rely on the self-weight and super fluidity of the cement mortar to ...

Embodiment 2

[0041] Moisten 90% of the crushed stone with 1.5% of water by mass, add 5% of emulsified asphalt and mix well, and finally add 3.5% of mineral powder and fully mix to form emulsified asphalt Mixture;

[0042] The cement mortar used for grouting is made by mixing dry powder mortar with water. Add water accounting for 20% of the mass percentage of cement mortar into the mixing pot of the cement mortar mixer, stir at a low speed, and then add dry powder cement mortar accounting for 80% of the mass percentage of cement mortar Add it to the mixing pot, after the water and the dry cement mortar are evenly mixed, stir at high speed for 300 seconds;

[0043] The composition and mass ratio of dry powder mortar are: cement 46.5%, superfine quartz sand 25%, fly ash 10%, metakaolin 12%, expansion agent 6%, early strength agent 0.3%, dry powder superplasticizer 0.2%;

[0044] The surface of the prepared cement mortar emulsified asphalt mixture, relying on the self-weight of the cement mor...

Embodiment 3

[0052] Moisten 90% of the crushed stone with 1.5% of water by mass, add 5.5% of emulsified asphalt and mix well, and finally add 4% of mineral powder and fully mix to form emulsified asphalt Mixture;

[0053] The cement mortar used for grouting is made by mixing dry powder mortar with water. Add water accounting for 20% of the mass percentage of cement mortar into the mixing pot of the cement mortar mixer, stir at a low speed, and then add dry powder cement mortar accounting for 80% of the mass percentage of cement mortar Add it to the mixing pot, after the water and the dry powder cement mortar are evenly mixed, stir at high speed for 360 seconds;

[0054]The composition and mass ratio of dry powder mortar are: cement 46.5%, superfine quartz sand 25%, fly ash 10%, metakaolin 12%, expansion agent 6%, early strength agent 0.3%, dry powder superplasticizer 0.2%;

[0055] The surface of the prepared cement mortar emulsified asphalt mixture, relying on the self-weight of the ceme...

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Abstract

The invention discloses a semi-flexible composite pavement material and belongs to the technical field of modern pavements. The semi-flexible composite pavement material comprises the following components in percentage by weight: 65%-75% of gravels or gravel mixtures, 15%-20% of self-made dry powder cement mortar, 3%-8% of emulsified asphalt, 2%-5% of mineral powder and 5%-10% of water. The cold-mix semi-flexible composite pavement material disclosed by the invention is simple and convenient in construction process without using construction machine and equipment used for large-scale production, is mixed and formed at normal temperature without being heated; the subsequent grouting procedure also can be carried out at the normal temperature, thereby saving the energy; and the cold-mix semi-flexible composite pavement material disclosed by the invention has the advantages of energy conservation and environment friendliness. The invention also discloses a preparation method of the semi-flexible composite pavement material. According to the preparation method, the cement mortar is grouted into large-gap open-graded emulsified asphalt mixtures.

Description

technical field [0001] The invention belongs to the field of modern pavement engineering construction, in particular to asphalt materials for road construction, in particular to a semi-flexible composite pavement material with emulsified asphalt in the surface layer and a preparation method thereof. Background technique [0002] The traditional asphalt concrete pavement is mainly characterized by insufficient rigidity, prone to rutting at high temperature, and has a short service life; the cement concrete pavement is poor in flexibility, prone to damage such as plate cracking, plate breaking, and mud pumping, and expansion joints need to be installed , affecting driving comfort. In order to overcome the shortcomings of the above two traditional pavements, semi-flexible composite pavement came into being. [0003] The semi-flexible composite pavement is a composite pavement with the characteristics of both cement concrete pavement and asphalt pavement. The semi-flexible com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B26/26
Inventor 吴旷怀洪永顺王伟明孟繁冰杨国良
Owner 浙江固路交通科技有限公司
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