将抗疏力固化剂运用到黄土加固中,并对比水泥、石灰改性黄土性质,探究抗疏力固化剂改性机制。通过强度试验、崩解试验、渗透试验探索改性土工程性质。通过开展水滴入渗、X衍射、电镜扫描、压汞等试验分别分析土样土颗粒表面能、矿物成分、微观结构、孔隙充填情况以探究改性机制。试验结果表明:抗疏力固化剂改性黄土强度、抗崩解性显著提高,渗透性略有降低。水滴入渗试验显示抗疏力改性黄土土颗粒表面自由能极大降低,斥水性明显优于水泥、石灰改性土;不同抗疏力固化剂添量土样X衍射图谱中物象群峰基本相同;SEM图像显示随抗疏力固化剂掺量提高,黄土中粉土颗排列方式基本不变,细小黏附物发生凝聚,附着物略有增多;压汞数据显示抗疏力改性黄土中大、中、小孔隙体积均略有减小,微孔隙明显增多。初步得出抗疏力改性黄土的机制在于:降低土颗粒表面能以提高阻水、抗水性;抗疏力物质包裹土颗粒及细小黏土颗粒发生凝聚来连结土颗粒,强化骨架颗粒连结强度;抗疏力材料膨胀挤密作用较弱,改性黄土通透性好。抗疏力固化剂在改善黄土力学性质、水理性质的基础上,还一定程度上解决了传统固化剂在提高阻水性的同时通透性降低的矛盾。 The anti-sparing agent is applied to the consolidation of loess, and the properties of cement and lime-modified loess are compared to explore the modification mechanism of anti-sparing agent. Through the strength test, disintegration test, penetration test to explore the nature of modified soil engineering. The surface energy, mineral composition, microstructure and pore filling of soil samples were analyzed by means of water infiltration, X-ray diffraction, electron microscope scanning and mercury intrusion test to explore the mechanism of modification. The test results show that the strength and anti-disintegration properties of loess modified with the anti-sparing agent are significantly increased and the permeability is slightly reduced. Water infiltration test showed that the surface free energy of the modified sparse soil loess particles greatly reduced, water repellency was significantly better than the cement, lime modified soil; different anti-sparing agent curing agent content of X-ray diffraction patterns of the basic image peaks SEM images showed that with the increase of the content of the anti-sclerotic curing agent, the arrangement of silt particles in the loess remained basically unchanged, the small adherends aggregated and the attachments slightly increased; , Medium and small pore volume decreased slightly, micro-pore increased significantly. The preliminary results show that the mechanical properties of modified loess are: reducing the surface energy of soil particles to improve the water blocking and water resistance; the anti-sparse substance encapsulating particles and fine clay particles are aggregated to join soil particles and strengthen the bonding strength; Anti-sparse material expansion and contraction of the weaker, modified loess good permeability. On the basis of improving mechanical and hydraulic properties of loess, the anti-sparing agent curing agent also solves the contradiction between the traditional curing agents and the decrease of permeability while improving the water-blocking property to a certain extent.