Basalt Fiber SMA-13Bituminous Mixture Of Road Performance And The Application Research

Now, putting the reinforcing fibers into various asphalt mixture types has became a kindof new tool, which can improve asphalt mixture road performances. But all fibers are facingseveral insurmountable problems: can’t endure high temperature and low intensity. So it isnecessary to look for an environmentally friendly, efficient and stable chemical performanceroad fiber.Basalt fiber, as a new type of environmentally friendly road mineral fiber, has beenprogressively used for road materials. It not only can make up for the low intensity of theorganic fiber, low elasticity modulus, high temperature performance shortcomings of poor,but also can be recycled. Therefore, SMA-13asphalt mixture and a new mineral fiber-basaltfiber are selected to carry out the the indoor test study of the performance of fiber asphaltmixture and compared with other fiber asphalt mixture performances to provide a reference tofurther improve the performance of the asphalt pavement.Through comparing several kinds of fiber itself performance research first, and thenthrough the dynamic shear test study of different fiber mortar of high temperatureperformance analysis, through the test and ductility test different fiber cone into the degreeslow temperature performance of asphalt mortar system research and comparison, and analysisof basalt fiber asphalt mortar enhancement effect, prove that basalt fiber has good physicaland mechanical properties. Again through the ductility test analysis different basalt fiberlength to fiber asphalt ductility, the influence of the maximum tension and the consumed work,basalt fiber asphalt mixture for road performance tests are used to determine a reasonablebasalt fiber length. After according to the Marshall test to determine the different dosage ofbasalt fiber corresponds to the optimum proportion. Finally through rutting test, split test andfreeze-thaw splitting test and immersion Marshall test, water seepage test, surface structuraldepth, bending tensile test on basalt fiber in SMA-13of high-temperature stability,low-temperature crack resistance and water stability, structure depth and systemic research onthe flexural performance, in order to test the different proportion of basalt fiber in SMA-13and lignin fibers and improve the effect of SMA-13improve performance comparison, through fort shellen analysis leakage test with Ken fort tower flying test to determine theoptimum content of basalt fiber, finally the optimum dosage was0.4%.Experimental study found that the physical and chemical properties of basalt fiber itselfthan lignin fiber and polyester fiber, viscose pulp of high temperature and low temperaturealso stronger than other fiber, basalt fiber and road performance of SMA-13has significantlyimproved, compared with common vegetable fiber SMA-13, high temperature resistance, lowtemperature, and the bending tensile performance has the very big enhancement, variousperformance ascension also makes SMA-13pavement service life growth, suggests that basaltfiber has broad prospects.Through to the real project (highway shaoxing section) the basalt fibre SMA-13road,further understand the basalt fiber SMA-13construction technique and construction points forattention of using basalt fibre SMA-13road traffic is good, the surface without damage, thearticle also has carried on the economic performance evaluation on engineering, analysis ofbasalt fiber cost is higher, but from a long-term point of view, it increases the service life ofroad and actually reduce the cost of the SMA-13road, illustrates the applicability of the basaltfibers, basalt fibers in our expressway promoting improved experience.