Study On Quantification Of Energy Consumption And Carbon Emission During The Period Of Asphalt Pavement Construction

Now more than 90% of China's highways are asphalt pavement structure with semi-rigid base.In the process of production of raw materials such as stone mining,asphalt refining and the use of large machinery during high-temperature asphalt mixing and paving during construction,a large amount of energy is consumed while greenhouse gases are also increasing the global environment pollution burden.At present,domestic and foreign achievements are mainly based on empirical values for qualitative or semi-quantitative research,and the current lack of quantitative standards for energy consumption and carbon emissions during asphalt pavement construction makes it difficult to scientifically and accurately conduct energy consumption and carbon emissions throughout the construction period description.It is urgent to explore related quantitative methods to supplement the content in this field to effectively solve the energy conservation and emission reduction problems in the highway industry.In this paper,the construction period of asphalt pavement is divided into three stages: raw material production,raw material transportation,and construction,and the relevant software model theoretical methods are mainly explored to rationally establish the quantitative model of energy consumption and carbon emissions in the three stages of asphalt pavement surface construction period.First,refer to the domestic comprehensive energy consumption calculation standard and the Emission Factor Database issued by the IPCC to determine the basic quantitative parameters,so as to ensure the reliability of the quantitative results.Secondly,the raw material production stage is divided into the raw material production upstream stage and the raw material production processing stage.Based on the GREET model software,the raw material upstream stage is modeled and calculated to obtain the relevant energy consumption and carbon emission values;the quantitative list of raw material processing stages is summarized and analyzed the relevant literature by the literature review method.The raw material construction stage is divided into the processing plant to mixing station transportation stage and the mixing station to construction point transportation stage,using the construction quota method to quantify and analyze the processing plant to mixing station transportation stage;based on the MOVES model database to obtain the vehicle basic emission rate in the bin section for the actual transportation,based on the actual recorded instantaneous speed of the dump truck to obtain the VSP bin distribution.According to the theoretical method of the MOVES model,the basic emission data of the dump truck is calculated and used as the basic value for the creation of quantitative model of the transportation stage between the mixing station and the construction site.The construction phase is divided into mixing stage,paving stage and rolling stage.In the mixing and paving stages,regression analysis is used to perform multiple linear regression analysis on actual engineering survey data to obtain multiple linear regression equations between energy consumption and influencing factors,and combined with quantitative basic parameter data to establish quantitative models for the first two stages;The rolling stage is based on actual engineering survey data to determine the fuel consumption per unit time of each machine,and perform quantitative analysis with the number of construction quota units.Finally,the quantitative models established at each stage were used to quantitatively calculate the energy consumption and carbon emissions during the asphalt pavement construction of the support project-national highway deep mountain line.Based on the analysis results,the corresponding countermeasures for energy saving and emission reduction measures during the asphalt pavement construction were proposed.This paper has 52 pictures,40 tables,and 86 references.