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A platform for research: civil engineering, architecture and urbanism
Study on dust pollution law and chemical dust suppression technology of non hard pavement in urban construction sites
Abstract Dust pollution has been a serious problem for the construction industry. Wind currents inevitably kick up dust on the ground during construction. Dust will not only affect the physical and mental health of construction workers, but also pollute the environment. In this paper, the law of dust generation and diffusion in typical construction sites is simulated and analyzed. According to the simulation, the wind flow lasts for 5s–10s, and the dust concentration in the air reaches more than 50 mg/m3 in the daily environment. In order to control dust pollution, a kind of "green environmental protection" dust suppressor suitable for construction site was developed by using grafting polymerization technology in molecular modification technology. By means of performance characterization, the synthetic ingredients of dust suppressor were determined as 2.5g sodium alginate, 5g acrylamide, 0.15 g N,N ′-methylene bisacrylamide, and the mass ratio of ammonium persulfate to acrylamide was 3%. The optimum temperature for synthesis of dust suppressor was 60 °C. The synthesized dust suppressor can still retain more than 80% moisture after 90min of oven drying at 45 °C, which indicates that the water retention is good. Under the ambient wind speed of 12 m/s, the wind erosion resistance rate is above 99%, which indicates that it has fine anti-wind erosion performance. According to the results of dust suppression experiment, the synthesized dust suppression agent can control the dust in the construction site well.
Graphical abstract Display Omitted
Highlights The dust raising in sites is mainly caused by the moment difference generated by resistance, buoyancy and gravity. The mathematical model describing the dust movement on the road surface of building construction is derived. An efficient dust suppressant for building sites was synthesized by graft copolymerization. The synthetic dust suppressant can ensure that the dust emission is less than 1% under the ambient wind speed of 12 m/s.
Study on dust pollution law and chemical dust suppression technology of non hard pavement in urban construction sites
Abstract Dust pollution has been a serious problem for the construction industry. Wind currents inevitably kick up dust on the ground during construction. Dust will not only affect the physical and mental health of construction workers, but also pollute the environment. In this paper, the law of dust generation and diffusion in typical construction sites is simulated and analyzed. According to the simulation, the wind flow lasts for 5s–10s, and the dust concentration in the air reaches more than 50 mg/m3 in the daily environment. In order to control dust pollution, a kind of "green environmental protection" dust suppressor suitable for construction site was developed by using grafting polymerization technology in molecular modification technology. By means of performance characterization, the synthetic ingredients of dust suppressor were determined as 2.5g sodium alginate, 5g acrylamide, 0.15 g N,N ′-methylene bisacrylamide, and the mass ratio of ammonium persulfate to acrylamide was 3%. The optimum temperature for synthesis of dust suppressor was 60 °C. The synthesized dust suppressor can still retain more than 80% moisture after 90min of oven drying at 45 °C, which indicates that the water retention is good. Under the ambient wind speed of 12 m/s, the wind erosion resistance rate is above 99%, which indicates that it has fine anti-wind erosion performance. According to the results of dust suppression experiment, the synthesized dust suppression agent can control the dust in the construction site well.
Graphical abstract Display Omitted
Highlights The dust raising in sites is mainly caused by the moment difference generated by resistance, buoyancy and gravity. The mathematical model describing the dust movement on the road surface of building construction is derived. An efficient dust suppressant for building sites was synthesized by graft copolymerization. The synthetic dust suppressant can ensure that the dust emission is less than 1% under the ambient wind speed of 12 m/s.
Study on dust pollution law and chemical dust suppression technology of non hard pavement in urban construction sites
Zhang, Feng (author) / Lu, Ying (author) / Wang, Yapeng (author) / Jiang, Zhongan (author) / Liu, Jianguo (author) / Chen, Jihe (author)
Building and Environment ; 229
2022-12-17
Article (Journal)
Electronic Resource
English
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