Research data for "Enhancing surface cracking and erosion resistances in lateritic soil with eco-friendly surface spraying agents"

This is the research data for our study entitled "Enhancing surface cracking and erosion resistances in lateritic soil with eco-friendly surface spraying agents". Abstract: Lateritic soil slopes are typically protected using vegetative techniques, but a vulnerable period exists in the early stages before vegetation establishes, leading to significant desiccation cracking and surface erosion. This study aims to address these issues of lateritic soil by applying an optimized environmentally friendly agent using the surface spraying method. A series of laboratory tests were conducted to examine the influences of various potential agents on the tensile strength, desiccation cracking, surface erosion, and plant growth in lateritic soil. Finally, the protective mechanism of the screened optimal agent was analyzed. The results show that untreated lateritic soil at natural dry density after drying has a low tensile strength of 15.1 kPa, resulting in a high crack intensity factor of 8.30% after wet-dry cycles and a large erosion ratio of 2.92 g/cm² under heavy rainfall. Soil stabilizer, sodium silicate, and alkaline lignin demonstrate effectiveness in enhancing strength, mitigating cracks, and controlling erosion at appropriate concentrations, but they inhibit plant growth in lateritic soil. Polyaluminum chloride cannot prevent surface erosion, although it improves tensile strength and crack resistance and does not inhibit plant growth. Polyacrylamide exhibits the best overall performance as it can increase the tensile strength to 57.7 kPa, reduce the crack intensity factor to 3.44% and the erosion ratio to within 0.10 g/cm2, without affecting plant growth. Because polyacrylamide is also easily accessible, cost-effective and fast-acting, it stands out as the superior surface spraying agent for protecting lateritic soil slopes.本数据集为我们题为《采用环保型表面喷施剂提升红土（lateritic soil）抗表面开裂与侵蚀性能》的研究配套科研数据。 红土坡体通常采用植被防护技术，但在植被定植前的早期阶段存在防护薄弱期，易引发显著的干燥开裂与表面侵蚀问题。本研究旨在通过表面喷施优化后的环保型试剂，解决红土的上述病害问题。研究开展了一系列室内试验，以考察多种候选试剂对红土抗拉强度、干燥开裂特性、表面侵蚀及植物生长的影响。最终对筛选得到的最优试剂的防护机理进行了分析。 试验结果显示，天然干密度状态下的未处理红土经干燥后，抗拉强度仅为15.1 kPa；经干湿循环后开裂强度因子高达8.30%，强降雨条件下侵蚀比达2.92 g/cm²。土壤稳定剂、硅酸钠与碱性木质素在适宜浓度下可有效提升强度、抑制开裂并控制侵蚀，但会抑制红土中植物的生长。聚合氯化铝虽可提升抗拉强度与抗裂性能，却无法阻止表面侵蚀，且对植物生长无抑制作用。聚丙烯酰胺整体性能最优：可将抗拉强度提升至57.7 kPa，将开裂强度因子降至3.44%，侵蚀比控制在0.10 g/cm²以内，且不会影响植物生长。此外，聚丙烯酰胺易于获取、成本低廉且见效迅速，因此成为红土坡体表面防护的最优喷施试剂。