道路施工环保型抑尘剂的制备及其性能评价

Preparation and performance evaluation of an environment-friendly dust suppressant for road construction

为解决道路施工过程中产生的扬尘污染问题,以水溶性淀粉、海藻提取液、羟丙基甲基纤维素等为原料,制备了一种施工道路环保型抑尘剂。模拟抑尘剂实际应用场景,将制备的环保型抑尘剂稀释不同倍数后喷洒尘样,分析了尘样的保湿性、吸湿性和抗风蚀性。结果表明:在喷洒原液稀释2倍的抑尘剂20 h后,尘样的保湿性和吸湿性仍分别稳定维持在4.5%和2.2%左右;在10m/s的风蚀下,碾压后的风蚀率仅为2.742%,粘度和表面张力分别为12 m Pa·s和46.90 m N/m;与喷洒水的尘样相比,喷洒抑尘剂的尘样含氧官能团增多,尘样的亲水性得以提高;在喷洒原液稀释2倍的抑尘剂后,尘样具有良好的黏连性。

In order to solve the problem of dust pollution during road construction,an environmental friendly dust suppressant for road construction was prepared using water soluble starch,seaweed extract and hydroxypropyl methylcellulose as raw materials.To simulate the actual application of the dust suppressant,the prepared dust suppressant was diluted by different times and then sprayed on the dust samples.The moisture retention,moisture absorption,wind erosion resistance of the dust samples were tested.The results show that the moisture retention and moisture absorption of the dust sample maintain about 4.5%and 2.2%,respectively,20 hours after sprayed by double diluted solution.After eroding by 10 m/s wind,the wind erosion rate is only 2.742%,and the viscosity and surface tension are 12 m Pa·s and 46.90 m N/m,respectively.Compared with the dust sprayed with water,the dust sprayed with dust suppressant has more oxygen-containing functional groups and its hydrophilicity increases.After sprayed with double diluted dust suppressant,the dust sample has good adhesiveness.