T/CHTS 10098-2023 Rubber-composite modified asphalt semi-open grained mixture application technical guidelines

Scope

Road surface cracks are the main type of damage affecting the lifespan of asphalt pavements in China. There are many practical projects and major research projects on this issue in China. Generally, measures such as adding a stress-absorbing structure layer (2 cm to 6 cm) under the asphalt surface layer, flexible base layers (ATB-25 and ATB-30 with a thickness of 8 cm to 12 cm), and inverted graded gravel structure layers (10 cm to 20 cm) to increase the flexibility of the structure have achieved certain results. However, adding structural layers, on the one hand, results in a significant increase in resource consumption and project costs; on the other hand, it increases the difficulty and work intensity of construction organization, progress, and quality control of asphalt pavements. At the same time, as the key anti-cracking layer of the base layer, there are rarely targeted anti-cracking structure and material optimization research and applications in China, where ordinary asphalt mixtures AC-25 are commonly used.
Based on the previous research results of rubber asphalt and anti-cracking asphalt structure layers applied and studied in Shanghai and other places, Guangzhou Transportation Investment Group Co., Ltd. undertook the scientific research project of the Guangdong Provincial Department of Transportation "Design and Optimization Technology Research of Semi-Rigid-Flexible Composite Base Asphalt Pavement Structure", adopting the technical route of functional optimization of both binder and gradation at the same time, increasing the toughness of the binder and the stress dispersion effect of the aggregate skeleton, and conducting anti-cracking optimization research on the structure and materials of the asphalt base layer. The research results of rubber-modified semi-open graded mixture have been applied to the pavement base layers of multiple roads and national major infrastructure projects, including the 44.435 km-long pavement base layer of the Guangzh

Development Information

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