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Uses of Quarry Waste in Highway Construction and Optimization of Pavement Structure

Author: LiRong
Tutor: ZouGuiLian
School: South China University of Technology
Course: Road and Railway Engineering
Keywords: Stone farm waste Road bed Subgrade Resilient Modulus Cement stabilized soil Pavement structure optimization
CLC: U414
Type: Master's thesis
Year: 2011
Downloads: 25
Quote: 0
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Abstract


The sand and gravel materials is an indispensable material in road construction, short-term, non-renewable mineral resources. In recent years, China Road and an annual increase of more than 100,000 km mileage consumption of up to billions of tons of sand and gravel materials, causing serious damage to the origin of natural and ecological and environmental sustainability. Meanwhile, Chinese stone mining is extensive production annually produces about 400 million m3 of various quarry waste, how efficient for the road construction, it becomes valuable material resources, road engineering solved problems, road construction, ecological problems. For stone farm waste in road works on the use of an idea. Guangdong Province increased from highway blocks Extension (Zengcheng - Conghua) K17 080 ~ K17 620 crossing Guangzhou Conghua Rongxing stone farm waste dumps District, an area of ??about 32,000 m2, stone farm waste about 60 million m3. Large-scale view of the waste stockpiles, another site piling up the occupied land, the impact on the environment, and the relocation of transport for a long span of time, affect the construction schedule, the cost is high. This paper discusses the feasibility of the application of the embankment, pavement structure layer by engineering ways to properly resolve the relocation and application problems, achieve economic purpose of rational use of stone farm waste. Rongxing quarry waste raw materials, optimization analysis study for the feasibility of the road and the practical engineering and asphalt pavement structure. Materials, stone farm waste through a lot of trials particle size analysis and physical properties, and thus its feasibility for road structure layer analysis to determine the reinforcement for the road bed (80cm) and cement stabilized soil sub-base (20cm). Utilization of reinforcement in the road bed, indoor stone farm waste compaction test based on multiple factors, and by the construction of an outdoor test section to study the construction parameters and quality control indicators. The stone farm waste indoor and outdoor Subgrade Resilient Modulus simultaneously provide reliable parameters to optimize the design. By laboratory experiments in the use of cement stabilized soil base, the outdoor test section detection and the construction of large-area tracking study stone farm waste for the structural layer of pavement performance parameters. Structural optimization to use BISAR program were grassroots and asphalt surface layer to optimize the design and calculate the economic benefits they achieved. The study showed that: a large the stone farm waste grain size variability and plasticity index, other physical properties are relatively small. Maximum dry density of stone farm waste by multiple factors volatile, the degree of compaction and subsidence indicators can be used to control the quality of construction of the road bed. The Stone Field wastes reinforced road bed effect, the Subgrade Resilient modulus values ??can be increased by more than 70%, reduce the Pavement Deflection layer bottom effective tensile stress. For cement stabilized soil base performance to meet the regulatory requirements. Cement stabilized macadam base pavement structure optimization, can be thinned 6cm, and the stone farm waste utilization achieved remarkable economic and social benefits.

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CLC: > Transportation > Road transport > Road works > Road construction materials
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