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Stress relief pavement

A technology of stress relief and surface layer, which is applied in the field of stress relief pavement, can solve the problems of shortened service life of pavement, easily affected pavement, easy cracking of pavement, etc., and achieves the effect of avoiding cracking

Inactive Publication Date: 2021-06-25
义乌浩盛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this product has only absorption function and no structural function. After being used in the "white and black" projects in Beijing, Shanghai and other cities, it has been proved that its stress absorption effect is limited, and an additional structural layer is required, which undoubtedly increases the strength of the entire structure. thickness and cost
In addition, the "Strata" stress-absorbing layer will fundamentally lose its stress-absorbing function if it is structurally damaged in use
[0004] Therefore, at present, the concrete pavement is extremely prone to cracking due to its own stress, which greatly shortens the service life of the pavement, and makes the pavement extremely susceptible to impact when people are driving or walking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A stress relieved pavement such as image 3 and 4 As shown, the pavement body includes the concrete surface layer 1, the waterproof adhesive layer, the drainage stress absorption layer 3, the middle surface layer 4, the adhesive layer 5 and the upper layer 6 arranged sequentially from bottom to top.

[0031] The concrete surface layer 1 includes a concrete layer and a steel frame filled in the concrete layer. By setting the steel frame, the concrete layer can be attached to the steel frame, so that the structural strength of the concrete surface layer 1 is effectively strengthened, so that the steel frame can support the concrete. The stress of the layer is resisted to avoid the problem that the concrete layer is more prone to cracking.

[0032] The waterproof adhesive layer includes several wide anti-crack stickers bonded on the top surface of the concrete layer, glass fiber grid 2 laid on the top surface of the wide anti-crack sticker, and asphalt covered on the wide...

Embodiment 2

[0044] The difference from Example 1 is:

[0045] High-performance asphalt mastic-coated skeleton particles include 84 parts of 3-5mm aggregate, 16 parts of 0-3mm aggregate, 4 parts of mineral powder and 6 parts of high-viscosity asphalt.

[0046] Test items unit Test results skills requirement Individual judgment bitumen content ％ 7 —— —— Oil-stone ratio ％ 6.54 —— —— Martens relative density / 2.3522 measured value —— stability KN 4.86 ≥5.0 qualified flow value 0.1mm 30 20～40 qualified porosity ％ 16.7 15～23 qualified Mineral Gap Ratio ％ 32.4 —— —— bitumen saturation ％ 43 —— —— Kentucky Scatter ％ 16.6 ≤20 qualified Schellenberg Bitumen Leakage ％ 0.21 ≤0.3 qualified Rutting test times / mm 4016 ≥4000 qualified

[0047] Table 1 is the test result of the asphalt mixture index in Example 1

[0048] Test items unit Test results skills requ...

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Abstract

The invention discloses a stress relief pavement, relates to a municipal engineering technology, and aims to solve the problems that the pavement is extremely easy to crack due to the stress of a concrete pavement, so that the service life of the pavement is greatly shortened, and the pavement is extremely easy to be influenced in the driving or walking process of people. According to the technical scheme, a concrete surface layer comprises a concrete layer and a steel bar frame filled in the concrete layer, and a waterproof bonding layer comprises a plurality of wide anti-cracking pastes bonded to the top face of the concrete layer, glass fiber grids laid on the top faces of the wide anti-cracking pastes and asphalt waterproof layers covering the wide anti-cracking pastes and located on the outer sides of the glass fiber grids; a drainage stress absorption layer is of a mixture coarse particle skeleton structure, and the mixture coarse particle skeleton structure forms gaps among coarse particles. The stress in the pavement can be absorbed, and the situation that the pavement cracks due to the stress release problem is avoided.

Description

technical field [0001] The present invention relates to municipal engineering technology, and more specifically, it relates to a stress relief road surface. Background technique [0002] After a period of use, the cement concrete pavement will be damaged to varying degrees. Adding asphalt concrete surface layer (commonly known as "white plus black") on the cement concrete pavement can improve the use function of the cement pavement, improve the smoothness of the pavement, and prolong the service life of the cement pavement. However, the tensile effect caused by the shrinkage or displacement of the cement concrete slab in the horizontal direction, or the bending and tensile stress at the bottom of the surface layer, or the vertical shear stress at the joint or crack under the action of heavy traffic loads, will all occur on the asphalt concrete surface. Reflective cracks are produced in the layer, which affects the life of the asphalt concrete surface, and the damage is part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32E01C11/22E01C11/18
CPCE01C7/325E01C7/32E01C11/224E01C11/18
Inventor 施德飞
Owner 义乌浩盛新材料有限公司