چكيده به لاتين
Increasing frequent heavy loads increases the premature fatigue of asphalt pavements and consequently increases the cost of road maintenance, which inevitably improves the properties of bitumen and asphalt mixtures. Among the asphalt mixture components, although the amount of bitumen in the asphalt is negligible, it plays a very important role in the asphalt mixture performance. Styrene Butadiene Styrene is one of the most widely used asphalt-quality polymers, due to reasons such as instability in bitumen, high prices, and import for Iran, to attract researchers to the use of alternative materials along with the minimization of the minimum functional properties of this polymer Has driven In this study, in order to find the suitable alternative for this polymer, a mixture of low-priced domestic polymer production with styrene-butadiene-styrene and polypropylene with a weight ratio of 30, 50 and 70% polymer blends are used. In this regard, asphaltic mixtures containing 3, 4 and 5% mixtures and 4 and 5% styrene butadiene styrene (control polymer) were prepared compared to bitumen weights, and four-point bending beam fatigue tests, indirect pulling fatigue, indirect pulling and modulus of strength On cylindrical samples. The results showed that polymer specimens improved asphalt fatigue, and even in 4% and 5% of the mixture containing 70% styrene butadiene ridge, fatigue life was higher than styrene-butadiene-styrene-containing samples. This suggests that the polymer composition in improving fatigue life can be a good alternative to this expensive imported polymer to the country.
