风积沙油污泥热解残渣泡沫轻质土性能分析  

Research on performance of foamed lightweight soil of aeolian sand and oil sludge pyrolysis residues

作　　者：任克旗 王勇[1] 雷兵兵 张江鹏 刘杰 REN Keqi;WANG Yong;LEI Bingbing;ZHANG Jiangpeng;LIU Jie(College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi 832003,China;Xinjiang Engineering Research Center for Disaster Prevention and Control Technology of Mountain Transportation Infrastructure,Xinjiang Key Laboratory for Safety and Health of Transportation Infrastructure in Alpine and High-altitude Mountainous Areas,Urumqi 830000,China;Xinjiang Engineering Research Center for Disaster Prevention and Control Technology of Mountain Transportation Infrastructure,Xinjiang Transportation Planning Survey and Design Institute Co.,Ltd.,Urumqi 830000,China)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832003 [2]新疆交通规划勘察设计研究院有限公司新疆维吾尔自治区山地交通基础设施灾害防治技术工程研究中心,新疆乌鲁木齐830000 [3]新疆交通规划勘察设计研究院有限公司新疆高寒高海拔山区交通基础设施安全与健康重点实验室,新疆乌鲁木齐830000

出　　处：《中国粉体技术》2025年第2期141-151,共11页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:51768062。

摘　　要：【目的】制备环保经济且抗压强度较高的风积沙油污泥热解残渣泡沫轻质土(foamed lightweight soil of aeolian sand and oil sludge pyrolysis residues,SOFS)材料,用于路基填筑。【方法】以风积沙、油污泥热解残渣、水泥、复合发泡剂、水为原料制备SOFS,设计25组六因素五水平正交试验,通过流动度、28 d抗压强度试验和微观分析,对比各因素对SOFS的流动度、抗压强度和试件内部结构的影响,确定原料的最佳配合比。【结果】风积沙掺量、油污泥热解残渣掺量、水固比(质量比,下同)对SOFS的流动度与无侧限抗压强度的影响较大;搅拌时间、发泡剂稀释倍数、泡沫与浆液体积比对SOFS的流动度影响较小,对抗压强度影响显著;微观分析表明风积沙和油污泥热解残渣均参与水泥的水化反应,水化反应生成孔径均匀的水化硅酸钙凝胶,有助于提高材料的强度;SOFS最佳配合比为泡沫与浆液体积比为0.8∶1,发泡剂稀释45倍,水固比为0.33∶1,搅拌时间为100 s,掺入油污泥热解残渣质量为120 g,掺入风积沙质量为90 g。【结论】最佳配合比制备的SOFS符合城市快速路、高速公路、一级公路路面底面深度为0~0.8 m的路基填筑规范要求,可以作为沙漠公路路基填筑材料。Objective To promote waste utilization and rational use of resources,aeolian sand and pyrolysis residues of oil sludge are selected as raw materials to produce a sustainable and economical foamed lightweight soil.The study analyzes the fluidity and unconfined compressive strength of foamed lightweight soil of aeolian sand and oil sludge pyrolysis residues(SOFS)to prepare an environmentally friendly subgrade filling material with high compressive strength.Methods Foamed lightweight soil was prepared using aeolian sand,pyrolysis residues of oil sludge,cement,a composite foam-ing agent,and water as raw materials.25 sets of orthogonal experiments with six factors and five levels were designed.The fluid-ity and 28-day unconfined compressive strength were evaluated to determine the influences of various factors and obtain the opti-mal mix ratio.X-ray diffraction(XRD)analysis was conducted to identify the ion components contained in various samples and assess the involvement of aeolian sand and oil sludge pyrolysis residues in the hydration reaction of cement.Electron microscope tests were used to examine the internal microstructures of test specimens,and the structural characteristics contributing to higher compressive strength were summarized.Results and Discussion The content of aeolian sand,pyrolysis residues of oil sludge,and the water-solid ratio were found to have a greater impact on both the fluidity and unconfined compressive strength of the SOFS.The amount of aeolian sand affected fluidity due to the lack of cohesion in aeolian sand particles.Under the action of water flow and gravity,the slurry of the foamed lightweight soil tended to spread more easily.In contrast,the amount of oil sludge pyrolysis residues affected fluidity by reduc-ing it because the sticky nature of these particles inhibited slurry spreading.The water-solid ratio also impacted fluidity.A higher water-solid ratio led to more water,which enhanced the driving force of the water,and consequently increased fluidity.Factors such as mixing time,

关 键 词：风积沙 油污泥热解残渣 泡沫轻质土 无侧限抗压强度 流动度 微观分析 

分 类 号：TU528[建筑科学—建筑技术科学] TB3[一般工业技术—材料科学与工程] TB44