油污泥热解残渣改良粗粒硫酸盐渍土力学性能试验研究
EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF COARSE-GRAINED SULFATE SALINE SOIL BY PYROLYSIS RESIDUE OF OIL SLUDGE
李博林 1冉武平 1曾立峰 1李世彤2
作者信息
- 1. 新疆大学新疆交通基础设施绿色建养与智慧管控重点实验室,乌鲁木齐 830047
- 2. 新疆天聚建设投资集团有限责任公司,乌鲁木齐 830000
- 折叠
摘要
为探究油污泥热解残渣改良粗粒硫酸盐渍土的力学性能,试验研究了残渣掺量和盐渍化程度对粗粒硫酸盐渍土回弹模量以及无侧限抗压强度的影响规律.结果表明:粗粒硫酸盐渍土的回弹模量和无侧限抗压强度均随残渣掺量的增加呈先提高后下降的趋势.当残渣掺量为10%时,各项力学性能提升最显著.此时回弹模量最大为 245.52 MPa,无侧限抗压强度最大为 0.48 MPa.随着含盐量增加,改良粗粒硫酸盐渍土的力学性能先提高后下降,且随残渣掺量的增加,非盐渍土较盐渍土的力学性能提升更加明显.根据X射线衍射(X-ray diffraction,XRD)和扫描电镜(scanning electron microscope,SEM)试验微观分析,油污泥热解残渣改良粗粒硫酸盐渍土主要由物理和化学两个因素共同作用,颗粒间的嵌挤摩擦和离子间的置换反应促就了改良盐渍土强度的提高.
Abstract
To explore the mechanical properties of coarse-grained sulfate saline soil improved by pyrolysis residue of oil sludge,the effects of the content of pyrolysis residue of oil sludge on resilient modulus and unconfined compressive strength of coarse-grained sulfate saline soil are investigated through indoor tests.The results show that the resilient modulus and unconfined compressive strength of the improved coarse-grained sulfate saline soil increase initially and then decrease with the increase of residue content under different salt content conditions.The most significant improvement of mechanical properties is observed when the residue content is 10%.The maximum resilient modulus is 245.52 MPa,and the maximum unconfined compressive strength is 0.48 MPa.The mechanical properties of the improved coarse-grained sulfate saline soil increase initially and then decrease with the increase of salt content,and the improvement of mechanical properties of non-saline soil was more significant than that of saline soil with the increase of residue content.According to X-ray diffraction(XRD)and scanning electron microscope(SEM)analysis,the improvement of coarse-grained sulphate saline soil by pyrolysis residue of oil sludge is mainly affected by physical and chemical factors.The friction of particles and the displacement of ions promote the strength of improved saline soil.
关键词
粗粒硫酸盐渍土/油污泥热解残渣/回弹模量/无侧限抗压强度/盐渍土改良Key words
coarse-grained sulfate saline soil/pyrolysis residue of oil sludge/resilient modulus/unconfined compression strength/improvement of saline soil引用本文复制引用
基金项目
国家自然科学基金项目(51768070)
新疆维吾尔自治区天池英才——青年博士项目(51052300548)
新疆维吾尔自治区高校基本科研项目(202335120004)
出版年
2024
NETL
NSTL
万方数据