阅读说明：本技术 一种抗裂缝防冲刷的水泥路面复合结构 (Crack-resistant anti-scouring cement pavement composite 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裂缝防冲刷的水泥路面复合结构,从下至上依次包括垫层、下基层、上基层、抗裂缝防冲刷层和水泥混凝土面层。本发明的抗裂缝防冲刷的水泥路面复合结构,通过对其化学成分进行优化,在微观程度上改进乳化沥青的内部结构,其具有优异的抗水冲刷能力,并且具有防渗透性能、抗滑性能和抗裂缝性能,本发明的水泥路面复合结构可杜绝路表水渗透到基层、应力缓冲、延缓反射裂缝的产生和实现水泥混凝土道面在多效能联结层上的有限滑动。(The invention discloses a crack-resistant scour-prevention cement pavement composite structure which sequentially comprises a cushion layer, a lower base layer, an upper base layer, a crack-resistant scour-prevention layer and a cement concrete surface layer from bottom to top. The crack-resistant and scour-proof cement pavement composite structure disclosed by the invention has the advantages that the chemical components are optimized, the internal structure of the emulsified asphalt is improved in a microscopic degree, the emulsified asphalt has excellent water scouring resistance, and has anti-permeability, anti-skid performance and crack-resistant performance, and the crack-resistant and scour-proof cement pavement composite structure can be used for completely eradicating road surface water from permeating into a base layer, buffering stress, delaying the generation of reflection cracks and realizing the limited sliding of a cement concrete pavement on a multi-efficiency connecting layer.)

1. the utility model provides a crack resistance scour protection's cement road surface composite construction which characterized in that, from supreme cushion coat, lower basic unit, upper base layer, crack resistance scour protection layer and the cement concrete surface course of including in proper order down.

2. the crack-resistant and scour-resistant cementitious pavement composite structure of claim 1, wherein the crack-resistant and scour-resistant layer comprises a bottom bearing layer, a transition layer, and an upper surface layer.

3. the crack-resistant and scour-resistant cementitious pavement composite structure of claim 2, wherein the lower bearing layer comprises the following materials in parts by weight:

4. The crack-resistant and scour-preventing cement pavement composite structure is characterized in that the broken stone has a particle size of 5-10 mm, and the full-spread rate is 60-80%.

5. the crack-resistant and scour-resistant cementitious pavement composite structure of claim 3, wherein the stabilizer comprises 70-75 wt% of butyl epoxystearate and 25-30 wt% of pentaerythritol.

6. the crack-resistant and scour-resistant cementitious pavement composite structure of claim 2, wherein the transition layer comprises the following materials in parts by weight:

7. the crack-resistant and scour-resistant cementitious pavement composite structure according to claim 6, wherein the thickener comprises 60-76 wt% of xanthan gum and 24-40 wt% of polyethylene oxide.

8. The crack-resistant and scour-preventing cement pavement composite structure according to claim 6, wherein the number average molecular weight of the ethylene-tetrafluoroethylene-hexafluoropropylene copolymer is 4800-5200.

9. the crack-resistant and scour-resistant cementitious pavement composite structure of claim 2, wherein the upper surface layer comprises the following materials in parts by weight:

10. The crack-resistant and scour-resistant cement pavement composite structure according to claim 9, further comprising 1-3 parts by weight of methyl vinyl silicone oil.

Technical Field

the invention relates to a pavement structure, in particular to a crack-resistant and scour-proof cement pavement composite structure.

background

Over twenty years of highway construction, the mileage of two or more levels of roads in China reaches 42.5 kilometers, and the highway exceeds 6.5 kilometers. Although the cement pavement structure in China has been developed for decades, the design method is basically established on the basis of a series of research results in the early seven, eighty and ninety years of the last century, and the design method is limited by the current technological level, so that the supported road grade is low, the load of traffic vehicles is small, the running speed is slow, and the construction technology is laggard.

With the rapid development of national economy and the increase of material flow, the demand of road transportation is continuously increased, the general road structure cannot be better transported, some roads have poor structural performance, the damage condition is very serious after the use for a certain time, the repair is complex, the construction cost is not saved, and the normal road transportation is influenced. The existing cement pavement structure has poor crack resistance and scour prevention performance, so that surface water is easy to permeate into a base layer and a reflection crack is generated, and therefore, the pavement structure with good crack resistance and scour prevention performance is required to be improved.

Disclosure of Invention

aiming at the defects, the invention aims to develop a crack-resistant scour-prevention cement pavement composite structure which has excellent scour-prevention performance and crack-resistant performance.

the technical scheme of the invention is summarized as follows:

The utility model provides a crack erosion prevention's cement road surface composite construction that splits, wherein, from supreme cushion layer, lower basic unit, upper base layer, crack erosion prevention layer and the cement concrete surface course of including in proper order down.

preferably, the crack-resistant and scour-preventing cement pavement composite structure is characterized in that the crack-resistant and scour-preventing layer comprises a lower bearing layer, a transition layer and an upper surface layer.

Preferably, the crack-resistant and scour-preventing cement pavement composite structure comprises the following materials in parts by weight:

Preferably, the crack-resistant and scour-preventing cement pavement composite structure is characterized in that the particle size of the broken stone is 5-10 mm, and the full-pavement rate is 60-80%.

Preferably, the crack-resistant and scour-preventing cement pavement composite structure comprises 70-75 wt% of epoxy butyl stearate and 25-30 wt% of pentaerythritol.

preferably, the crack-resistant and scour-preventing cement pavement composite structure comprises the following materials in parts by weight:

Preferably, the crack-resistant and scour-preventing cement pavement composite structure comprises 60-76 wt% of xanthan gum and 24-40 wt% of polyethylene oxide.

preferably, the crack-resistant and scour-preventing cement pavement composite structure is characterized in that the number average molecular weight of the ethylene-tetrafluoroethylene-hexafluoropropylene copolymer is 4800-5200.

preferably, the crack-resistant and scour-preventing cement pavement composite structure comprises an upper surface layer and a lower surface layer, wherein the upper surface layer comprises the following materials in parts by weight:

Preferably, the crack-resistant and scour-preventing cement pavement composite structure further comprises 1-3 parts by weight of methyl vinyl silicone oil.

The invention has the beneficial effects that:

the crack-resistant scour-prevention cement pavement composite structure sequentially comprises a cushion layer, a lower base layer, an upper base layer, a crack-resistant scour-prevention layer and a cement concrete surface layer from bottom to top, wherein the crack-resistant scour-prevention layer comprises a lower bearing layer, a transition layer and an upper surface layer, the internal structure of the cement pavement is improved in a microscopic degree by optimizing chemical components of the lower bearing layer, the transition layer and the upper surface layer, the crack-resistant scour-prevention cement pavement composite structure has excellent water scouring resistance, and has anti-permeability, anti-sliding performance and crack-resistance.

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 present case provides a crack scour prevention's cement road surface composite construction, wherein, from supreme cushion layer, lower basic unit, upper base layer, crack scour prevention layer and the cement concrete surface course of including in proper order down.

As another embodiment of the present disclosure, the crack-resistant erosion-resistant layer includes a lower bearing layer, a transition layer, and an upper surface layer.

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

TABLE 1 test results of SBS modified emulsified asphalt for lower bearing layer (based on synchronous macadam technical requirements)

The stability, the chemical resistance and the water and scour resistance of the asphalt pavement are improved by adding the tetrapropylene fluoride latex, the surface water seepage channel of the asphalt pavement can be sealed, and the serious water damage caused by the water permeating into the asphalt structure is prevented.

as another embodiment of the present invention, the crushed stone has a particle size of 5 to 10mm and a full-spread rate of 60 to 80%.

As another embodiment of the present disclosure, the stabilizer comprises 70 to 75 wt% of butyl epoxystearate and 25 to 30 wt% of pentaerythritol. The thermal stability and the flow property of the asphalt material are improved by adding epoxy butyl stearate and pentaerythritol, so that the asphalt material is stable at high and low temperatures, and cracks are delayed.

As another embodiment of the present disclosure, the transition layer includes the following materials in parts by weight:

TABLE 2 test results of emulsified asphalt for upper surface layer and transition layer

The ethylene-tetrafluoroethylene-hexafluoropropylene copolymer generates a cross-linking reaction under the action of 2-ethyl-4-methylimidazole and generates a grafting reaction with the cationic emulsified asphalt, the formed network structure wraps the cationic emulsified asphalt and the broken stone dispersed in the cationic emulsified asphalt, the phase separation of a transition layer material is prevented, the separation and the layering are not generated after the storage at high temperature, and the excellent crack-resistant and erosion-resistant capacity of the pavement material is provided; the filler plays a role of a structural framework layer at the transition layer, the wear resistance and the mechanical strength of the pavement are improved, and the filler of the transition layer is special stone 1-5 mm.

as another embodiment of the present disclosure, the thickener comprises 60 to 76 wt% of xanthan gum and 24 to 40 wt% of polyethylene oxide. The thickening agent is a rheological additive, can thicken the asphalt material, prevent the sagging phenomenon in construction, endow the asphalt material with excellent mechanical property and storage stability, and the aluminum silicate and the polyoxyethylene are synergistically used as the thickening agent, so that the pavement maintenance material has storage stability and mechanical strength.

In another embodiment of the present invention, the ethylene-tetrafluoroethylene-hexafluoropropylene copolymer has a number average molecular weight of 4800-5200.

as another embodiment of the present disclosure, the upper surface layer includes the following materials in parts by weight:

as another embodiment of the present invention, the silicone oil further comprises 1 to 3 parts by weight of methyl vinyl silicone oil.

Polyvinylidene fluoride and bismaleimide modified epoxy resin generate cross-linking reaction and generate grafting reaction with cation emulsified asphalt, and the formed network structure wraps the cation emulsified asphalt and crushed stone dispersed in the cation emulsified asphalt, so that the upper surface material is prevented from generating phase separation, and the separation and layering are not generated after the storage at high temperature, thereby providing excellent crack-resistant and scour-resistant capacity for the pavement material; the filler plays a role of a structural framework layer at the transition layer, the wear resistance and the mechanical strength of the pavement are improved, the filler of the upper surface layer comprises 1-5 mm and 5-10 mm, the service life of the solidified mixture of the upper surface layer is prolonged, and more specifically, the low-temperature cracking resistance and the wear resistance of the asphalt are improved, so that the asphalt still can keep no expansion, no shrinkage and no cracking under extreme climate; by adding the methyl vinyl silicone oil with specific viscosity into the mixture on the upper surface layer, a hydrophobic layer can be formed on the upper surface layer, the hydrophobic effect is achieved, the interfacial adhesion force of a water phase is reduced, the water cannot be infiltrated similar to the lotus leaf surface effect, and meanwhile, the effect of adjusting the viscosity and the fluidity of the whole mixed material is achieved, so that each filler is uniformly coated by emulsified asphalt, and the waterproof effect is achieved.

TABLE 3 test results of main indexes of crushed stones

specific examples and comparative examples are listed below: