Abstract

Dust from construction field is one of sources for the atmosphere particulate pollution. In this study, a solidifying material, modified polyvinyl alcohol (MPA), is used to control the dust from soil. The controlling efficiency of MPA is evaluated based on its anti-wind and anti-rain erosion performance under different conditions (i.e., soil types, spraying amount of MPA, slope morphologies (gradients and unevenness), and treated time). Results indicate that: MPA can bind well with the soil particles and it is able to strengthen the integrity of the surface. Soil treated with MPA exhibits a good anti-wind effects, and PM10 and PM2.5 in environment do not increase even under a nine-grade wind erosion. Soil treated with MPA can maintain the surface integrity under a rainstorm, and there are no erosion traces and mud after rain erosion. The application of MPA has no limitation in terms of soil type, soil slope and surface morphology, thus, it has a wide applied prospect in engineering.

摘要

施工现场扬尘是大气颗粒物污染的来源之一。在这项研究中，固化材料，改性聚乙烯醇（MPA），用于控制土壤中的灰尘。根据MPA在不同条件下的抗风和抗雨水侵蚀性能（即土壤类型，MPA的喷涂量，坡度形态（坡度和不平整度）和处理时间）评估其控制效率。结果表明：MPA可以很好地与土壤颗粒结合，并且可以增强表面完整性。MPA处理过的土壤具有良好的抗风效果，即使在九级风蚀下，环境中的PM10和PM2.5也不会增加。MPA处理过的土壤可以在暴雨中保持表面完整性，雨水侵蚀后没有侵蚀痕迹和泥浆。