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A Construction Technology of Regular Pre-cracking Stress Compensation to Prevent Reflective Cracks in Overlay of Asphalt Surface

A stress compensation, asphalt surface layer technology, applied in coatings, anti-corrosion coatings, coagulation pavement paved on site, etc., to achieve the effect of improving service life

Active Publication Date: 2021-04-02
湖南高速设计咨询研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a regular pre-cracking stress compensation and prevention of reflective cracking construction technology for overlaying asphalt pavement, which effectively solves the problem that reflective cracks appear concentrated around the original road structural joints, and at the same time solves the problem of The problem of reflective cracks in old cement concrete roads after asphalt paving was solved, and regular pre-cracking was realized by adding structural joints on the basis of expansion joints of the original structure, which guided the development direction of cracks and reflected the cracks caused by the deformation of the underlying cracks. Effective stress compensation for cracks, thereby effectively improving the service life of the original road, to solve the problems raised in the above background technology

Method used

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  • A Construction Technology of Regular Pre-cracking Stress Compensation to Prevent Reflective Cracks in Overlay of Asphalt Surface
  • A Construction Technology of Regular Pre-cracking Stress Compensation to Prevent Reflective Cracks in Overlay of Asphalt Surface
  • A Construction Technology of Regular Pre-cracking Stress Compensation to Prevent Reflective Cracks in Overlay of Asphalt Surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A construction technique for regular pre-cracking stress compensation to prevent reflection cracks in asphalt surface overlay, such as Figure 1-2 shown, including the following steps:

[0053] Step 1. Carry out regular pre-cracking on the base surface of the original cement concrete base 1, carry out groove cutting at intervals of 2-2.5m, and cut out rectangular grooves 3 for the new cutting seam 11 and the original structural seam;

[0054] Step 2: Grind the horizontal surface in the rectangular groove 3, anchor into the nickel-plated anchor bolt 4, spray a layer of emulsified asphalt with a thickness of 0.5-1cm to level and solidify, and use a nut to anchor the stress compensation structure 5 in the rectangular groove. On the nickel-plated anchor bolt 4 in the groove 3;

[0055] Step 3: Grouting and filling the central triangular void of the stress compensation structure 5 through one end, the filling material 7 used for the grouting filling is composed of medium co...

Embodiment 2

[0078] The difference from Example 1 is that the surface of the stress compensation structure 5 is also provided with a protective layer, and the protective layer is prepared by the following method:

[0079] Take the following raw materials and weigh them by weight: 20 parts of polyurethane resin, 10 parts of calcium carbonate powder, 13 parts of iron red, 12 parts of aluminum powder, 8 parts of mica powder, 10 parts of graphite, 4 parts of organic bentonite, 3 parts of alcohol ester twelve , 3 parts of triethanolamine, 2 parts of emulsified silicone oil and 30 parts of methanol;

[0080] S1. Add the weighed alcohol ester dodecane, triethanolamine, emulsified silicone oil and methanol into the mixer and stir for 20min at a stirring speed of 600r / min to prepare a mixed solution;

[0081] S2. Add polyurethane resin, calcium carbonate powder, iron red, aluminum powder, mica powder, graphite and organic bentonite into a pulverizer and pulverize until the particle diameter of the ...

Embodiment 3

[0087] The difference with embodiment 2 is the preparation of protective layer, and its specific preparation method is as follows:

[0088] Take the following raw materials and weigh them by weight: 25 parts of polyurethane resin, 13 parts of calcium carbonate powder, 15 parts of iron red, 14 parts of aluminum powder, 9 parts of mica powder, 13 parts of graphite, 5 parts of organic bentonite, 4 parts of alcohol ester twelve , 4 parts of triethanolamine, 3 parts of emulsified silicone oil and 40 parts of methanol;

[0089] S1. Add the weighed alcohol ester dodecane, triethanolamine, emulsified silicone oil and methanol into the mixer and stir for 25min at a stirring speed of 700r / min to prepare a mixed solution;

[0090] S2. Add polyurethane resin, calcium carbonate powder, iron red, aluminum powder, mica powder, graphite and organic bentonite into a pulverizer and pulverize until the particle diameter of the material is not greater than 200nm to obtain a mixed powder material;...

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Abstract

The invention discloses a construction technology for preventing asphalt pavement overlay reflection cracks by using regular pre-cracking stress compensation. The construction technology comprises five construction steps that 1, regular pre-cracking is conducted on the base surface of an original cement concrete base; 2, rubbing down treatment is conducted on a horizontal plane in a rectangular groove; 3, grouting filling is conducted on a central triangular space of a stress compensation structure through an end part; 4, a layer of composite elastic filling material layer is paved on the stress compensation structure; and 5, a high viscosity asphalt fiber sealing layer and an asphalt pavement are sequentially constructed on the base surface of the original cement concrete base. Accordingto the construction technology for preventing the asphalt pavement overlay reflection cracks by using regular pre-cracking stress compensation, the problem that the reflection cracks are concentratedaround the original road structural cracks is solved, meanwhile the problem that the reflection cracks occurs on an old cement concrete road after the asphalt pavement is additionally paved is solved,regular pre-cracking is achieved by adding constructed cracks on the basis of original constructed expansion cracks, the development direction of the crack is guided, and thus the service life of theoriginal road is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of road engineering, and more specifically relates to a construction technique for regular pre-cracking stress compensation to prevent reflection cracks in asphalt surface layer overlaying. Background technique [0002] Road engineering refers to the whole process of planning, design, construction, maintenance and management of roads and the engineering entities involved. Like any other category of civil engineering, road engineering has obvious technical, economic and management characteristics. [0003] In the construction process of existing road projects, the problem of reflective cracks often occurs after the old cement concrete road is paved with asphalt surface, and the reflective cracks are concentrated around the structural joints of the original road, which seriously affects the service life of the original road. , a construction technique of regular pre-cracking stress compensation to prevent ref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/18C09D175/04C09D5/10C09D7/61C09D7/65C09D7/63C09D7/62
CPCC08K2003/0812C08K2003/2272C08K2003/265C09D5/103C09D175/04C09D7/61C09D7/62C09D7/63C09D7/65E01C7/187C08L83/04C08K13/06C08K3/26C08K3/22C08K3/08C08K3/34C08K3/04
Inventor 钱野薛锐沈牛犇周纪陈邱林锋
Owner 湖南高速设计咨询研究院有限公司
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