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Composite waterproof adhesive layer and preparation method thereof

A composite, waterproof and sticky technology, applied to cohesive pavement paved on site, roads, buildings, etc., can solve the problems of affecting the service life of the pavement structure, troublesome normal construction, easy to roll up the grille, etc., and achieve a significant interlayer Stiffening effect, improve crack resistance, improve the effect of interlayer bonding

Active Publication Date: 2014-07-23
RES INST OF HIGHWAY MINIST OF TRANSPORT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The use of geogrid in the pavement structure to improve the anti-cracking ability of the pavement structure is one of the effective ways to make up for the insufficient resistance to large deformation and cracking of the hot sprinkled modified asphalt macadam seal. When the structural layer above the grille, construction transport vehicles, paver, etc. often cause damage to the grille, vehicle tires or paver tracks are easy to roll up the grille, which brings unnecessary troubles to normal construction
On the other hand, when the geogrid is used alone, the bonding between the geogrid and the upper and lower pavement structure layers is relatively weak, and it is easy to form an interlayer between the pavement structure layers, which affects the service life of the pavement structure

Method used

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  • Composite waterproof adhesive layer and preparation method thereof
  • Composite waterproof adhesive layer and preparation method thereof
  • Composite waterproof adhesive layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1, selection of rubber asphalt

[0050] The direct shear simulation test is used to select a reasonable level of viscosity, and the inclined shear test is used to select a reasonable level of spraying rate. Now it is described as follows:

[0051] Direct shear simulation test: Two steel plates A6 and B7 with the same hardness are used to replace the upper and lower bearing layers of the road for direct shear test. The test mode is as follows figure 2 , using rubber asphalt layers 3 with different viscosities as adhesive layer materials.

[0052] The sticky course material is AH-90# asphalt mixed with 5%, 10%, 15%, 20%, 25% of 40-mesh rubber powder to obtain rubber asphalt with different viscosities. See Table 1 for the viscosity test results. The spread amount of rubber asphalt in the test is 2.0kg / m2.

[0053] Table 1: Viscosity test and shear test results of rubberized asphalt

[0054] Rubber asphalt rubber powder content%

5％

10％ ...

Embodiment 2

[0067] The amount of gravel spread and the selection of specifications are mainly determined by its intended role and function. The main function of the gravel in the waterproof bonding layer is to provide a construction platform, which is convenient for the construction machinery on the upper bearing layer to work on the waterproof bonding layer; Interlayer resistance to shear deformation.

[0068] For the spreading of gravel, it is first necessary to avoid direct contact between the tires of the construction machinery and the spread of asphalt, so as to avoid damage to the spread of asphalt. The depth and width of the tread pattern of heavy-duty transport vehicles used in general engineering are about 1cm. from Figure 3-Figure 6 It can be seen that when spreading finer gravel, the amount of spreading should be larger, otherwise it is easy to stick the wheel and damage the asphalt layer; when spreading coarser gravel, the amount of spreading should be relatively small, abo...

Embodiment 3

[0076] Combined with the design and construction process of a composite waterproof adhesive layer on an expressway, an example is as follows:

[0077] 1. Raw materials and construction equipment

[0078] 1. Technical index of fiberglass geogrid material

[0079] The fiberglass geogrid is two-way warp knitted, with an aperture of 25-30mm, a width of 2m, and a length of 50m. The longitudinal and transverse tensile breaking strength per linear meter is 32.1kN / m, and the longitudinal and transverse breaking elongation is 2.9%. The other technical indicators meet the relevant requirements of "Geosynthetic Geogrid for Traffic Engineering" (JT / T480-2002), and the test method is according to The current "Geosynthetics Test Regulations" (JTG E50-2006) is implemented.

[0080] 2. Technical indicators of rubber asphalt

[0081] The test results of rubber asphalt technical indicators are as follows.

[0082] Table 4 Technical indicators of rubber asphalt

[0083]

[0084]

[00...

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Abstract

The invention relates to a ''composite waterproof adhesive layer and a preparation method thereof'', and belongs to the technical field of road construction. The composite waterproof adhesive layer comprises the following three structural layers from bottom to top: a glass fiber geogrid layer, a rubber asphalt layer and a single grain diameter gravel layer; the glass fiber geogrid is formed by bidirectional warp knitting, the longitudinal and transverse tensile strength at break in each linear meter is not less than 25kN / m, and the longitudinal and transverse elongation at break is not more than 4 percent; the rubber asphalt is high-viscosity asphalt, and the spray value is 2.0 to 2.6kg / m<2>; and the grain diameter range of the single grain diameter gravel is 13.2 to 19 millimeters, the single grain diameter gravel exceeding the grain diameter range is not more than 10 percent, and the spread area is 60 to 85 percent. The composite waterproof adhesive layer has strong bonding capacity with an upper bearing layer or a lower bearing layer, can integrally improve the adhesion and the waterproof performance among pavement structure layers, and obviously improves the integral cracking resistance of the pavement structure.

Description

technical field [0001] The invention belongs to the technical field of highway engineering, and specifically relates to a pavement waterproof adhesive layer and a preparation method thereof, which are used for interlayers of asphalt pavement structural layers, cement pavement overlay asphalt surface layer structural layers, bridge and tunnel asphalt pavement structural layers, etc. It is used to improve the connection state between layers of pavement and bridge and tunnel pavement structures, improve the integrity of each pavement structure layer, and at the same time play the role of waterproof and crack resistance. It plays an important role in improving the overall heavy load resistance of the pavement structure and prolonging the service life of the pavement structure and materials. Background technique [0002] At present, the interlayer treatment measures for highway engineering pavement and bridge and tunnel mainly include the following types: emulsified asphalt or mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/32
Inventor 杨志峰王旭东张蕾郭朝阳周兴业沈国辉李廷刚肖倩
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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