Overview
Lime-stabilized soil, known as 'sanhetu' in Chinese construction practice, is a time-tested composite material combining hydrated lime with local soils and sometimes sand or gravel aggregates. This mixture has been used for centuries in road construction and foundation works across Asia, particularly in regions with clay-rich soils. The material works through pozzolanic reactions between lime and soil particles, permanently improving the soil's engineering properties. Modern applications follow standardized mix designs, with typical lime content ranging from 3% to 10% by weight depending on the soil type and project requirements.
Physical and Chemical Properties
The key physical properties of lime-stabilized soil include increased unconfined compressive strength (typically 0.5-2.5 MPa after 7-28 days curing) and reduced plasticity index. The lime-soil reaction produces calcium silicate hydrates (C-S-H) that bind soil particles, creating a more rigid matrix. Chemically, the stabilization process involves cation exchange at clay particle surfaces followed by long-term pozzolanic reactions. The material's pH rises to 12-12.4 during initial mixing, creating an alkaline environment that inhibits biological growth and enhances durability against water penetration.
Main Applications
Primary applications include rural road subbases, where it serves as a cost-effective alternative to crushed stone. In urban areas, it's used beneath asphalt pavements to improve load-bearing capacity of weak subgrades. The material is particularly valuable in expansive clay regions where soil stabilization is mandatory. Beyond roads, lime-stabilized soil finds use in building foundation beds, canal linings, and earth dam construction. Its ability to utilize local soils makes it environmentally favorable, reducing the need for imported aggregates and minimizing construction carbon footprint compared to cement-stabilized alternatives.
Safety and Storage
Dry lime powder requires careful handling with NIOSH-approved dust masks (N95 or better) and protective goggles to prevent eye and respiratory irritation. Moistened material presents less dust hazard but requires gloves due to lime's caustic nature when wet. For storage, bulk materials should be kept under waterproof covers to prevent premature carbonation from atmospheric CO2. Properly cured lime-soil mixtures present minimal health risks, though direct contact should still be avoided. Always provide adequate site ventilation during mixing operations.
B2B Procurement Guide
When procuring lime-stabilized soil, specify the lime content percentage (usually 3-10%), soil type (preferably clayey), and maximum particle size (typically ≤50mm). Require laboratory test reports for optimum moisture content and maximum dry density according to ASTM D1557 or equivalent standards. Consider proximity to lime production facilities, as transportation costs significantly impact pricing. For large projects, on-site mixing with delivered quicklime often proves more economical than pre-mixed materials. Verify supplier certifications for lime quality (ASTM C977 for construction lime) and request field trial results for similar soil conditions.
Related Manufacturers
- 主营：软化剂、补钙剂、无机碱、环保石灰、工业级石灰、环保消石灰、环保熟石灰、灌装散装石灰粉、土壤改良生石灰、密封包装、食品添加剂、环保氧化钙、灰氢氧化钙、环保氢氧化钙、高纯度氢氧化钙
- 主营：碳酸钙粉、滑石粉、膨润土、生石灰氧化钙、熟石灰氢氧化钙、云母、云母岩片、珍珠岩、蛭石、玻璃粉、硅藻土、玻璃砂、陶瓷球、陶瓷砂、铝矾土、海泡石、木粉、木质纤维、电气石粉、锗石粉、橡胶颗粒、轮胎颗粒、石英砂、白云石
- 主营：金刚砂、氧化钙、轻钙粉、生石灰、重钙粉、轻质碳酸钙、重钙碳酸钙、鹅卵石滤料、造景火山石、重质碳酸钙、彩色雨花石、河沙建筑河沙、水处理鹅卵石
- 主营：真石漆、沙子全、腻子粉、石灰粉、粘土球、白沙子、烘干沙、膨润土、40目河沙、烘干河沙、水族婚庆、抗裂砂浆、钙粉工业、塑料橡胶、喷砂除锈、环氧草坪、人造沙滩、石粉填充、砂浆抹面、钻井泥浆、公园造景、石粉砂浆、石粉沙子、白色沙子、pvc填充料、河沙园艺
- 主营：彩色石子、彩沙、有机覆盖物、生石灰、火山岩、石英砂、彩色玻璃砂、蛭石、岩片、钙粉、鹅卵石、膨润土、粉煤灰、铝矾土、油田堵漏剂、高岭土、木粉、河沙、石膏粉、珍珠岩、陶粒、金刚砂
- 主营：硫酸钡、海泡石粉、小苏打、生石灰、熟石灰、碳酸钙、煅烧高岭土、硅藻土、工业尿素、三聚氰胺、氧化铁颜料
- 主营：干燥粉、氧化钙、营养补充剂、生石灰粉、环氧胶黏剂
- 主营：生物质颗粒、防火涂料、膨润土、云母粉、蛭石、石英砂、碳酸钙、高岭土、重钙、1250目云母粉、萤石粉、莫来砂、铁砂、火山石、夜光石
- 主营：填充母料、工业级氧化钙、氧化钙、生石灰块、生石灰、石灰、石灰厂、熟石灰、石灰块、石灰粉、氢氧化钙
- 主营：工业尿素、氧化钙、碳酸钙、三合土氧化钙、高岭土、硅藻土、膨润土、硫酸钡、重晶石、三聚氰胺、氢氧化钙、工业盐、石英砂、碳酸氢钠、小苏打、轻质碳酸钙、融雪剂、海泡石、磁粉、铁粉、矿渣粉、纳米碳酸钙、活性钙、脱硫增效剂
- 主营：磁粉、硅藻土、高岭土、熟石灰、云母、蛭石、彩砂、石英砂、碳酸钙、膨润土、电气石、防火涂料、陶土、麦饭石、火山石、鹅卵石、沸石、金刚砂、重晶石、滑石粉、萤石、铁粉、海泡石纤维、远红外粉、水洗石、圆粒砂
- 主营：染色彩砂、天然彩砂、岩片、石灰、碎石石子、蛭石片、膨胀蛭石、云母、石英沙、核桃壳、金刚砂、水洗石、胶粘石、水族砂、桑拿石、消防砂、悬浮彩砂、轻质彩砂、环氧彩砂、防水卷材页岩、玄武岩石子、氧化钙、氢氧化钙
- 主营：气动隔膜泵、防水密闭门、减速机、土氧化钙生石灰、凿岩机、泥浆泵、鱼尾板、25型U型钢、呼吸器、注浆机、集便器、聚氨酯清扫器、气动葫芦、压风供水自救装置、风筒、隔爆装置、枕木、排型梁、紧链器、柱鞋、托辊、锚杆钻机
- 主营：减速机、扒渣机、注浆机、氧化钙生石灰、凿毛机、钻煤层、新枕木、泥浆泵、抓木机、喷浆机、输送机、25u型钢、鱼尾板、凿岩机、马丽散、截止阀、呼吸器、注浆泵、集便器、材料车、煤电钻、水泥枕、密闭门、矿山机械设备、工矿配件
- 主营：云母碎、贝壳粉、芙蓉红、熟石灰、红外线、萤石球、石英粉、火山石、电气石、莫来砂、金云母、蛭石片、鹅卵石、雪花白、石英砂、杨木粉、保温海、萤石矿、起重机、目木粉、水洗砂、重铁砂、贝壳彩片、萤石粉、硅藻土