Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/66205
Title: Laboratory and in-situ assessment on construction emissions of asphalt pavements
Authors: Lin, S
Hung, W
Keywords: Asphalt pavements
Gaseous emissions
PM2.5
PMFC
PMSMA
SMA
VOCS
WC
Issue Date: 2016
Publisher: Research Publishing Services
Source: 8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016, 2016, p. 1106-1115 How to cite?
Abstract: Asphalt pavements are widely constructed throughout the world because of such qualities as superior engineering performance, comfortable riding surface, and short maintenance time. However, fume and odor generated during the construction of asphalt pavements at high production and construction temperatures not only pollute the air, but also pose health risks to the workers and others in the nearby micro-environment. Although significant amount of studies have been conducted on asphalt pavements, very limited of them have been focused on their environmental and health impact issues. This paper presents a study aims at assessing the construction emissions of asphalt pavements. To achieve this objective, PM2.5 and volatile organic compounds (VOCs) were closely monitored during the mixing and paving processes of four types of asphalt mixture both in the laboratory and on site. Four types of mixtures commonly used in Hong Kong were evaluated, including polymer modified friction course(PMFC), polymer modified stone matrix asphalt (PMSMA), stone matrix asphalt (SMA), and dense-graded wearing course (WC). The concentrations of PM2.5 were measured using a realtime PM monitor, while the VOCs were first collected with the canisters and then analyzed by a gaschromatic mass-spectrum (GCMS). Laboratory emission samples were collected when preparing the Marshall mixture at their corresponding construction temperatures. Field emission samples were collected when new pavement surfaces were built. Both the laboratory and field emissions data were then analyzed and compared. It was found that the construction emissions of asphalt pavements vary depending on the type of asphalt mixture. In general, the VOCs concentrations are extremely low. The concentrations of PM2.5 were highest at the initial stage of construction and decreased constantly with time both in laboratory and on site. The construction of the pavement surfaces with polymer modified asphalts produced relatively lower VOCs emissions compared to those with ordinary asphalts.
Description: 8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016, Singapore, 27-29 July 2016
URI: http://hdl.handle.net/10397/66205
ISBN: 9789811104497
DOI: 10.3850/978-981-11-0449-7-224-cd
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