Background technology
" communications and transportation " the 12 " development program " of Department of Transportation's issue, China plans 12 ends, the motorway total kilometrage reaches 10.8 ten thousand kilometers, covers 200,000 above urban population cities more than 90%, and China's population will all couple together with motorway above 200,000 city.Secondary and above highway mileage reach 650,000 kilometers, and state's provincial highway general technical situation reaches the level such as good, and the rural highway total kilometrage reaches 3,900,000 kilometers.And the year ends 2010, China's motorway mileage open to traffic has reached 7.4 ten thousand kilometers, 450,000 kilometers on the above highway of secondary.On the other hand, in recent years, along with building up of high-grade highway net, the volume of traffic has had larger increase, because developing rapidly of road construction, passenger-cargo freight volume that transport by road is finished and passenger-cargo volume of the circular flow proportion increase substantially, and have promoted the rapid growth of Chinese national economy.A lot of built highways are because heavy traffic, road conditions are destroyed more serious, overhaul and reorganization and expansion phase have been entered, in the near future, to changing of existing highway, expansion project can get more and more, secondly consequent heavy duty, overloading is on the rise, the large percentage of traction engine during particularly the traffic of the trunk lines of national expressways of some outbalances forms, and overloading is very serious, along with the volume of traffic increases and heavy duty, the increase road surface early damage of overloaded vehicle is serious, cause the thickness of domestic bituminous pavement constantly to increase, asphalt content continues to increase, the road surface cost constantly rises, and along with the long-term run at high level of International Petroleum Price, causes domestic asphalt price higher.China is the poor countries of petroleum resources, and now petrochemical industry can be the further cracking of most of pitch fuel oil and other technical oilss, fat, so in the long term, the pitch resource will be shorter, most pitch dependence on import.
At present, the plant asphalt in market mostly is the waste after the vegetables oil refining, accounts for about 3~5% of vegetables oil massfraction.Its main component is 60~80% lipid acid and pohytol, oil soluble and pitch approach, mainly for the production of casting binder, Rubber Softener, concrete prefabricated separant, black printing printing ink, bituminous composition, coating, surface activity carbon, leather agent and low-volatility fuel etc.
Also having a kind of plant asphalt is to utilize starchiness material or maize straw, wheat straw etc. to refine remaining waste behind the materials such as xylogen, vegetable-protein, these wastes are mostly thrown away at present, having wasted ample resources, namely is plant asphalt but become macromolecular cpd material afterwards through simple process.
Summary of the invention
The objective of the invention is: provide a kind of plant asphalt that utilizes to be added into petroleum pitch as road asphalt and production method, it utilizes the byproduct of straw processing is plant asphalt, replaces part petroleum pitch, is used for building of highway.
Road asphalt of the present invention is:
Petroleum pitch: 100
Plant asphalt: 20~100
Mierocrystalline cellulose or starch (stablizer): 0.01~0.1 of plant asphalt umber
Rosin (thickening material): 0.01~0.03 of plant asphalt umber
Above-mentioned raw materials is weight ratio.
Wherein petroleum pitch also comprises rubber asphalt or the rubber modified asphalt that road is used.
If petroleum pitch replaces with rubber asphalt or rubber modified asphalt, the additive that needs to add is that sulphur is 0.005~0.01 of rubber asphalt or rubber modified asphalt umber.
Plant asphalt is to utilize starchiness material or maize straw, wheat straw etc. to refine remaining waste behind the materials such as xylogen, vegetable-protein, through being processed into the material after the macromolecular cpd.
Petroleum pitch is a kind of byproduct of Crude Oil Processing, liquid, semisolid or the solid of the thickness of black or chocolate at normal temperatures, mainly contain the hydro carbons and the non-hydrocarbons derivative that dissolve in trieline, its character changes with the different of production method with forming with the crude oil source.
Rubber asphalt is with the dispersion agent of pitch as rubber powder, with rubber powder and petroleum pitch miscible a kind of modifying asphalt of making under hot conditions of high dosage.Claim again asphalt rubber.
Rubber modified asphalt refers to rubber powder and matrix petroleum pitch, added SBS, PE or other additives, at batch production finished product asphaltum that produce, that have higher storage stability.SBS, PE or other additives are 1%~2% (weight ratio) of rubber powder.
Production method of the present invention is:
A. with plant asphalt and petroleum pitch (or rubber asphalt, rubber modified asphalt) heating, temperature is at 140 ℃~190 ℃;
The plant asphalt that b. will heat and petroleum pitch (or rubber asphalt, rubber modified asphalt) are by weight proportion, pump into respectively in the tank with high-speed shearing equipment, and the adding stablizer stirs 10-20min, add thickening material again and additive stirs 5-10min, the mixture that mixes that obtains is finished product.Should continue when depositing to stir for, the finished product temperature is not less than 140 ℃, the finished product that mixes pumps into asphalt tank for the Asphalt concrete mixing machine.
The invention has the beneficial effects as follows: adopt plant asphalt and petroleum pitch (or rubber asphalt, rubber modified asphalt) under the effect of stablizer and tackifier, make it have preferably intermiscibility, improving the use properties of pitch and asphalt, is a new approach and the new method of Substitute For Partial petroleum pitch.
The pitch that present technique is produced has high viscosity, high softening-point, and under the prerequisite of carrying out good mix-design, asphalt has certain high-temperature stability, can improve the ability of the anti-rutting deformation of bituminous concrete pavement high temperature and Heavy Traffic.Improved the anti-low-temperature cracking ability under cold district and the heavy load; Make that pitch is anti-aging, antioxidant property improves, have the ability of higher fatigue resistance and opposing reflection crack, be conducive to prolongs life; take full advantage of renewable resources and substitute day by day exhausted petroleum pitch; have good energy-conserving and environment-protective performance, protection of the environment has realized utilization of waste material.
Compare the refinement of vegetable oil residue, the renewable pitch of bioid engineering method refining has possessed the requirement that large-scale industrialization is produced, measuring and calculating according to pertinent data, useful C5, the C6 sugar of maize straw accounts for greatly about 60% of its quality proportion, can directly refine into alcohol fuel or the polyvalent alcohol of high added value, remaining 30% part can directly be refined into plant asphalt, is equivalent to 18% of maize straw per ton and can refines into plant asphalt.
Utilize plant asphalt petroleum replacing pitch, the comprehensive utilization refuse, can not only improve the pavement performance of bituminous pavement, prolonging service life of pavement, reduce the road construction cost, and play and administer the effect of polluting, economize on resources, fully utilize a large amount of junks, meet national environmental protection policy and the requirement of developing a circular economy, building a conservation-minded society, implement especially the concrete practice of the strategy of sustainable development and implement scientific view of development.Have obvious economic and social benefit, therefore apply this investigative technique tool and be of great significance.
Embodiment 1
(1) with plant asphalt and petroleum pitch heating, temperature is at 160~170 ℃;
The plant asphalt that (2) will heat and petroleum pitch pump into respectively in the tank with high-speed shearing equipment in 3: 7 ratios, and add the stablizer of 3% (weight ratio) of plant asphalt, stir 10-20min.
(3) 1% (weight ratio) thickening material that adds again plant asphalt stirs 5-10min, and the mixture that mixes that obtains is finished product.
Should continue when depositing to stir for, the finished product temperature is not less than 140 ℃, the finished product that mixes pumps into asphalt tank for the Asphalt concrete mixing machine.
Embodiment 2
Petroleum pitch is become rubber asphalt, add 0.9% sulphur of rubber asphalt weight again, other is identical with embodiment 1.
Embodiment 3
Petroleum pitch is become rubber modified asphalt, add 0.6% sulphur of rubber asphalt weight again, other is identical with embodiment 1.