Epoxy asphalt pavement relies on its excellent performance, from domestic calendar year 2001 after the successful Application of yangtze river in nanjing two bridges, obtain promoting on the projects such as Jiang Daqiao, yangtze river in nanjing three bridges, the logical bridge of Soviet Union of making the best use of the advantages in profit in succession.According to statistics, a bridge adopts the bituminous epoxy paving steel bridge deck surplus in the of at present domestic existing 30, and the area of mating formation surpasses 500,000 m
Yet the used mixture structure of epoxy asphalt pavement is a suspension density structure, and porosity is little, and the fines accounting is big, so the epoxy asphalt pavement smooth surface, the macrostructure degree of depth is little.Following table 1 is depicted as the cling property parameter comparison on domestic several kinds of road surfaces commonly used.It is thus clear that epoxy asphalt concrete (EA) is on the low side with respect to the cling property on SMA commonly used and OGFC road surface.
Table 1 pavement structural depth contrast commonly used
China early introduces the Nanjing Er Qiao of epoxy asphalt pavement; Three bridges, profit are raised bridge, the logical bridge of Soviet Union used respectively about 10 years, 5 years, 5 years, 3 years; Can estimate that along with the increase in age of domestic epoxy asphalt pavement road, the emphasis of steel bridge face epoxy asphalt pavement will be by being main with construction; Lay equal stress on to building, and be that main direction develops to maintenance gradually with maintenance.
The preventive maintenance technology of flexible pavement commonly used all adopts pitch class material as cementitious matter like little table place, slurry seal etc. both at home and abroad, under vehicular load, is prone to take place shear failure.Preventive maintenances such as domestic little table place commonly used, slurry seal, cover technology, not enough with the epoxy asphalt pavement adhesion strength, be not suitable for the maintenance of epoxy asphalt pavement.Because the preventive maintenance of present domestic shortage epoxy asphalt pavement technology; Support pipe department generally when the disease of epoxy asphalt pavement injures steel plate safety; Promptly carry out the medium-capital overhauling maintenance, caused the consumption of a large amount of maintenance funds, and had a strong impact on traffic mating formation.
Summary of the invention
The objective of the invention is provides the antiskid wearing layer of a kind of making on epoxy asphalt pavement in order to solve the deficiency of existing epoxy asphalt pavement maintenance technology and surperficial cling property.
In order to achieve the above object, the invention provides a kind of antiskid wearing layer of epoxy asphalt pavement, this antiskid wearing layer is formed by epoxy resin and the rubble curing that is spread in epoxy resin surface, and gross thickness is 1～2mm; The antiskid wearing layer upper epidermis is the rubble exposed part that is solidificated in the epoxy resin; Content of epoxy resin is 1～1.5kg/m
2, the rubble consumption is 1～1.2kg/m
The present invention also provides a kind of antiskid wearing layer preparation method of epoxy asphalt pavement, may further comprise the steps:
(1) extracting epoxy resin and curing compound mix, stir;
(2) adopt mechanically spraying spreading or manual work to coat the epoxy asphalt pavement surface epoxy resin that mixes in the step (1) and curing compound, form sizing material; Wherein the consumption of epoxy resin is 1～1.5kg/m
(3) spreading one deck rubble in the surface of the sizing material in step (2) makes it to solidify with the epoxy resin sizing material, finally forms antiskid wearing layer; The spreading amount of rubble is 1～1.2kg/m
2Gained antiskid wearing layer gross thickness is 1～2mm, and its upper epidermis is the rubble exposed part that is solidificated in the epoxy resin.
Further improvement of the present invention is that above-mentioned rubble is spread in uniform in epoxy resin surface, and its medium stone partly is embedded in the epoxy resin, and part is exposed at epoxy resin surface.Rubble adopts simple grain footpath basalt; Particle diameter accounts for below 5% of rubble gross weight greater than the rubble of 1.18mm in the rubble; Particle diameter accounts for below 5% of rubble gross weight less than the rubble of 0.6mm, and particle diameter accounts for below 1% of rubble gross weight less than the rubble of 0.075mm, rubble washing and oven dry; And moisture content is less than 1%, and preferable particle size is 0.6～1.18mm; The preferred bisphenol A type epoxy resin of epoxy resin, the preferred amine curing agent of curing compound.
The present invention has the following advantages:
Adopt epoxy resin rubble ultra-thin wearing layer, rely on epoxy resin self high strength and with the high bond strength of epoxy asphalt pavement, can form integral body with former epoxy asphalt pavement, bear vehicular load; Simultaneously to epoxy resin surface spreading simple grain footpath rubble; Make rubble partly be mounted in the resin; Part is exposed at resin surface, treat that it solidifies after, the rough surface that the epoxy resin macadam relies on exposed rubble to form can improve the cling property of former epoxy asphalt pavement; Rely on the high osmosis ability of epoxy resin, the epoxy resin macadam can be filled up the crack of epoxy asphalt pavement, plays the effect of structural strengthening.
The specific embodiment
Below in conjunction with embodiment the antiskid wearing layer of epoxy asphalt pavement of the present invention is elaborated.
The material preferred embodiment
For the crack of the epoxy asphalt pavement that heals, cling property, water resistance and the durability that raising is mated formation, the present invention at first screens rings of material epoxy resins and rubble.
1, epoxide resin material performance requirement:
(1) self tension, flexural strength are high, high with the adhesion strength of asphalt pavement, can with former mat formation form wholely, be difficult for being destroyed by vehicular load;
(2) fracture elongation is higher, can adapt to the stretching strain that the surface of mating formation under the vehicle effect produces well, and is not easy to crack;
(3) resistance to elevated temperatures is good, requires the epoxy resin can be under 70 ℃ of conditions of high temperature, self performance, meets the demands with the adhesive property of former epoxy asphalt pavement;
(4) hardening time moderate, according to the open requirement of traffic, select the epoxy resin of different hardening times for use, such as will satisfying construction on the same day, the same day open to traffic requirement, the normal temperature cure time that requires epoxy resin is about 4～6h;
(5) permeance property is good, requires epoxy resin to have higher permeability, can be to surface layer or former microcrack of mating formation carry out bonding reinforcement, the pavement performance that improvement is mated formation down;
(6) modest viscosity is not trickled during construction, is prone to strike off;
(7) the anti-ultraviolet aging ability is strong, guarantees epoxy resin rubble wearing layer under solar radiation, and the performance degradation amplitude is little, does not influence the pavement performance of wearing layer.
The requirement of table 1 epoxy resin main performance
|Hot strength (25 ℃)
|Elongation at break (25 ℃)
|Pull strength (25 ℃) (with steel plate)
|Pull strength (70 ℃) (with steel plate)
|Pull strength (25 ℃) (with epoxy asphalt concrete)
|Pull strength (70 ℃) (with epoxy asphalt concrete)
|Hardening time (25 ℃)
||Satisfy the traffic requirement
|Permeability (25 ℃)
||The encapsulating method
|Viscosity (25 ℃)
||Be suitable for striking off, do not trickle
|Ultraviolet ray ageing (outer 1 year of simulating chamber) hot strength is than (25 ℃)
|Ultraviolet ray ageing (outer 1 year of simulating chamber) pull strength is than (25 ℃) (with steel plate)
|Ultraviolet ray ageing (outer 1 year of simulating chamber) pull strength is than (25 ℃) (with epoxy asphalt concrete)
According to above requirement; Filter out the optimal ring epoxy resins: said epoxy resin adopts the normal temperature cure system; General epoxy resin is bisphenol type epoxy, and normal temperature cure agent type is an amine curing agent, and epoxy resin mixes according to each producer's explanation with the curing compound ratio.Such as model is homemade epoxy resin and the curing compound of ER-18.
2, rubble requires:
(1) rubble adopts basaltic broken stone, and rubble will sieve, and wherein each square hole screen percent of pass reaches following standard respectively, washing and oven dry as far as possible, and moisture content is less than 1%;
The particle diameter requirement of table 2 epoxy resin rubble ultra-thin wearing layer building stones
||Percent of pass/%
||Greater than 95
||Less than 5
||Less than 1
(2) the rubble application rate reaches basically and is abound with 80% of area, and the rubble cleaning that will not solidify at epoxy resin surface;
(3) abrasion resistance of rubble will be got well, and guarantees resin rubble ultra-thin wearing layer under the wheel effect, and is not easy to wear.According to the abrasion test of the wet wheel of JTG T0752, resin rubble antiskid wearing layer is tested, require rate of wear at 100g/m
According to above requirement, choosing particle diameter is 0.6
～1.18mm basaltic broken stone, be 1～1.5kg/m at the consumption of epoxy resin
2Condition under, spreading amount is 1～1.2kg/m
2, its application rate is reached basically is abound with 80% of area.
Get epoxy resin, curing compound that model is ER-18, both are mixed in strict accordance with 1:0.46, stir; Epoxy resin that mixes and curing compound are adopted mechanically spraying spreading or artificial coating, and spreading amount is 1～1.5kg/m
2After the epoxy resin construction finishes, at its sizing material surface spreading one deck 0.6
～1.18mm the basaltic broken stone of particle diameter, rubble spill cloth requirement drying, cleaning, even, nothing accumulation, the spreading amount of rubble is 1～1.2kg/m
2, make it to solidify the final firm epoxy resin rubble antiskid wearing layer of bonding that forms with the epoxy resin sizing material.