Study On The Quantitative Analysis Of Energy Consumption And Emissions During The Period Of Asphalt Pavement Construction Based On LCA

Asphalt Pavement establish quantitative evaluation system of energy consumption and emissions is an important foundation to achieve asphalt pavement construction ecological development.Based on the Life Cycle Assessment(LCA),the asphalt pavement construction period is divided into physical and chemical materials,transportation,and construction in three stages,and gives the definition and scope of the various phases of the study,the use of experimental testing and data collection,analysis and other means carried a list of asphalt pavement construction machinery and raw materials and energy analysis,asphalt pavement materials and construction machinery inventory data collection,and on this basis to establish the energy consumption of asphalt pavement construction materials and construction of the three-stage emission calculation model quantify the energy consumption of asphalt pavement construction list.Finally,a comparative study of six different structures in the form of semi-rigid base asphalt pavement and flexible pavement asphalt pavement construction of energy consumption and carbon emissions,as the basis for a proposed asphalt pavement construction of energy conservation measures and methods.Asphalt pavement material energy emission quantification results showed;energy bituminous pavement construction material as a whole to be slightly higher than the base material,the highest consumption of SBS modified asphalt SMA-based material for 690 MJ / t,two ashes base material consumption maximum for 600MJ/t;carbon base material production stage is much larger than the pitch-based materials,carbon emissions from asphalt and concrete materials should be slightly larger than the bituminous gravel material.Inorganic Binder class paving two ashes largest emissions of about 153 kg CO2/t,SBS modified bitumen-based material SMA largest emissions of about 42 kg CO2/t;energy consumption and emissions generated by the transport of raw materials per unit mass Pavement Engineering the main source of the material transport stages of energy consumption and emissions,the control stage of transport asphalt pavement construction materials to reduce energy consumption and emissions should be the main haul raw materials;construction energy consumption and emissions significantly less than the base material of asphalt type material,heating part of the construction phase larger proportion,the proportion of energy consumption and emissions are generated by heating up to 90% and 80%;the construction of the thermal energy of warm mix mix compared to a decrease of approximately 19%,construction warm mix of emission reduction compared to hot mix about 12%;Asphalt pavement typical structure of energy emission quantification results showed that: the total energy consumption of three kinds of construction material asphalt pavement were more than semi-rigid base asphalt pavement,asphalt pavement structure construction of six kinds of energy composition,physico-chemical and phase construction phase is consumed the greatest two parts;three kinds of half the total carbon emissions rigid base asphalt pavement structure were more than three kinds of flexible Base asphalt Pavement.In the composition of carbon emissions,carbon emissions of six kinds of asphalt pavement construction phase generated by the materialization of total emissions are the largest proportion,followed by the construction phase,the total amount of carbon emissions produced by the transport stage smaller.Compare asphalt pavement construction unit thickness of each layer of the structure of energy consumption and emissions can be drawn: the material is the key to all stages of materialization layer structure of energy consumption and emissions;energy consumption and emissions in the construction phase of the asphalt layer structure is also occupied large the ratio should be optimized concrete construction technology and bituminous macadam mixture,reduce the mechanical fuel.