阅读说明：本技术 一种抗渗耐侵蚀的沥青基复合封层结构 (Impervious erosion-resistant asphalt base composite seal structure ) 是由 周庆月 于 2019-08-19 设计创作，主要内容包括：本发明公开了一种抗渗耐侵蚀的沥青基复合封层结构,从下至上依次包括碎石封层、第一稀浆分层和第二稀浆分层；碎石封层包括以下重量份的材料：SBS改性乳化沥青10～20重量份；填料80～100重量份；水15～30重量份；相容剂5～7重量份。本发明的抗渗耐侵蚀的沥青基复合封层结构,从下至上依次包括碎石封层、第一稀浆分层和第二稀浆分层,通过对各层成分进行优化,在微观程度上改进沥青的内部结构,其具有优异的韧性,并且抗渗耐侵蚀性能好,具有很好的稳定性能和耐久性。(The invention discloses an anti-permeability and anti-erosion asphalt-based composite seal structure which sequentially comprises a gravel seal, a first slurry layer and a second slurry layer from bottom to top; the gravel sealing layer comprises the following materials in parts by weight: 10-20 parts by weight of SBS modified emulsified asphalt; 80-100 parts by weight of a filler; 15-30 parts by weight of water; 5-7 parts of a compatilizer. The impervious erosion-resistant asphalt-based composite seal structure sequentially comprises a gravel seal, a first slurry layer and a second slurry layer from bottom to top, the internal structure of asphalt is improved in a micro degree by optimizing the components of each layer, and the impervious erosion-resistant asphalt-based composite seal structure has excellent toughness, good seepage-resistant performance, good stability and durability.)

1. An anti-permeability and anti-erosion asphalt-based composite seal structure is characterized by sequentially comprising a gravel seal, a first slurry layer and a second slurry layer from bottom to top; the gravel sealing layer comprises the following materials in parts by weight:

2. the impervious erosion-resistant asphalt-based composite seal structure according to claim 1, wherein the filler comprises 60-70 wt% of basalt and 30-40 wt% of lime.

3. The impervious erosion-resistant asphalt-based composite seal coat structure according to claim 1, wherein the compatilizer comprises 30-40 wt% of EEA resin and 60-70 wt% of oxazoline-terminated polyether.

4. The impervious, erosion-resistant asphalt-based composite seal structure of claim 1, wherein the first slurry layer comprises the following materials in parts by weight:

5. the impervious erosion-resistant asphalt-based composite seal coat structure according to claim 4, wherein the organic emulsion comprises 32-35 wt% of polyurethane resin, 40-44 wt% of vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer and 20-30 wt% of styrene-butadiene latex.

6. The impervious erosion-resistant asphalt-based composite seal coat structure according to claim 4, wherein the thickener comprises 44-46 wt% of silica gel and 54-56 wt% of polyethylene wax.

7. The impervious, erosion-resistant asphalt-based composite seal structure of claim 1, wherein the second slurry layer comprises the following materials in parts by weight:

8. the impervious erosion-resistant asphalt-based composite seal structure of claim 7, wherein the aggregate comprises 62-66 wt% limestone and 34-38 wt% sandstone.

9. The impervious erosion-resistant asphalt-based composite seal structure according to claim 8, wherein the particle size of the limestone and sandstone is 5-10 mm.

10. The impervious erosion-resistant asphalt-based composite seal coat structure according to claim 8, further comprising 3-5 parts by weight of a polypropylene-acrylic acid graft copolymer.

Technical Field

The invention relates to a pavement material and a preparation method thereof, in particular to an anti-permeability and anti-erosion asphalt-based composite seal structure.

Background

The slurry seal is a thin layer formed by mixing emulsified asphalt, coarse and fine aggregates, filler, water, additives and the like into a slurry mixture according to a design proportion by adopting mechanical equipment and paving the slurry mixture on an original pavement. When traditional slurry seal was laid on original road surface, the compactness is relatively poor for anti infiltration performance and erosion resistance are relatively poor, make the slurry seal life-span of laying extremely short, thereby lead to the road surface to lay repeatedly, not only caused huge economic loss, but also increased road maintenance's work load. An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

In view of the defects, the invention aims to develop an anti-seepage and anti-erosion asphalt-based composite seal layer structure which has excellent water seepage resistance and erosion resistance.

The technical scheme of the invention is summarized as follows:

an anti-permeability and anti-erosion asphalt-based composite seal structure comprises a gravel seal, a first slurry layer and a second slurry layer from bottom to top in sequence; the gravel sealing layer comprises the following materials in parts by weight:

preferably, the impervious and erosion-resistant asphalt-based composite seal structure comprises 60-70 wt% of basalt and 30-40 wt% of lime.

Preferably, the impervious and erosion-resistant asphalt-based composite seal coat structure comprises 30-40 wt% of EEA resin and 60-70 wt% of oxazoline-terminated polyether.

Preferably, the impervious and erosion-resistant asphalt-based composite seal layer structure is characterized in that the first slurry layer comprises the following materials in parts by weight:

preferably, the impervious and erosion-resistant asphalt-based composite seal coat structure comprises 32-35 wt% of polyurethane resin, 40-44 wt% of vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer and 20-30 wt% of styrene-butadiene latex.

Preferably, the impervious and erosion-resistant asphalt-based composite seal coat structure comprises 44-46 wt% of the thickening agent, and 54-56 wt% of the thickening agent.

Preferably, the impervious and erosion-resistant asphalt-based composite seal layer structure is characterized in that the second slurry layer comprises the following materials in parts by weight:

preferably, the impervious erosion-resistant asphalt-based composite seal structure comprises 62-66 wt% of limestone and 34-38 wt% of sandstone.

Preferably, the impervious and erosion-resistant asphalt-based composite seal structure is characterized in that the particle size of limestone and sandstone is 5-10 mm.

Preferably, the impervious and erosion-resistant asphalt-based composite seal coat structure further comprises 3-5 parts by weight of a polypropylene-acrylic acid graft copolymer.

The invention has the beneficial effects that:

the impervious erosion-resistant asphalt-based composite seal structure sequentially comprises a gravel seal, a first slurry layer and a second slurry layer from bottom to top, the internal structure of asphalt is improved in a micro degree by optimizing the components of each layer, and the impervious erosion-resistant asphalt-based composite seal structure has excellent toughness, good seepage-resistant performance, good stability and durability.

Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.

The scheme provides an anti-permeability and anti-erosion asphalt-based composite seal structure, which sequentially comprises a gravel seal, a first slurry layer and a second slurry layer from bottom to top; the gravel sealing layer comprises the following materials in parts by weight:

the technical indexes of the SBS modified emulsified asphalt are shown in the table 1:

TABLE 1

As another embodiment of the present disclosure, the filler includes 60 to 70 wt% of basalt and 30 to 40 wt% of lime. The filler plays a role of a structural framework layer in the gravel seal layer, and the wear resistance and the mechanical strength of the pavement are improved.

As another embodiment of the disclosure, the compatibilizer comprises 30 to 40 wt% of EEA resin and 60 to 70 wt% of oxazoline terminated polyether. The EEA resin and oxazoline-terminated polyether are cooperatively used as compatilizers and generate a grafting reaction with SBS modified emulsified asphalt, and a formed network structure wraps the cationic emulsified asphalt and fillers dispersed in the cationic emulsified asphalt, so that a chip seal material is prevented from generating phase separation, and segregation and layering are not generated after storage at high temperature, and the excellent anti-permeability and anti-corrosion capability of the chip seal is provided;

as another embodiment of the present disclosure, the first slurry layer comprises the following materials in parts by weight:

as another embodiment of the present invention, the organic emulsion comprises 32 to 35 wt% of polyurethane resin, 40 to 44 wt% of vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer, and 20 to 30 wt% of styrene-butadiene latex.

The polyvinylidene fluoride-tetrafluoroethylene-hexafluoropropylene copolymer and the polyurethane resin generate cross-linking reaction and generate grafting reaction with cation emulsified asphalt, and the formed network structure wraps the cation emulsified asphalt and fillers dispersed in the cation emulsified asphalt, so that the micro-surface sealing material is prevented from generating phase separation and does not generate segregation and layering after being stored at high temperature, and the excellent tensile fracture resistance and heat, seepage and erosion resistance of the slurry sealing layer are provided.

As another embodiment of the present invention, the thickener comprises 44-46 wt% of silica gel and 54-56 wt% of polyethylene wax. The silica gel and polyethylene wax act synergistically as a thickener to emulsify, stabilize or bring into suspension.

As another embodiment of the present disclosure, the second slurry layer comprises the following materials in parts by weight:

the vinylidene fluoride ether rubber is a quadripolymer of vinylidene fluoride, tetrafluoroethylene, perfluoromethyl vinyl ether and a vulcanization point monomer, and due to the introduction of fluorine atoms, the rubber is endowed with excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance.

As another embodiment of the present invention, the aggregate comprises 62-66 wt% of limestone and 34-38 wt% of sandstone. In order to enable the material to obtain the anti-permeability performance and the anti-erosion performance, the material is modified, and limestone and sandstone which have the synergistic performance of the anti-permeability performance and the anti-erosion performance are introduced.

As another embodiment of the present application, the particle size of limestone and sandstone is 5-10 mm.

As another embodiment of the present disclosure, the polypropylene-acrylic acid graft copolymer further comprises 3 to 5 parts by weight of a polypropylene-acrylic acid graft copolymer. The anti-permeability and erosion-resistant performance of the seal layer structure is further improved by adding the polypropylene-acrylic acid graft copolymer.

Specific examples and comparative examples are listed below: