论文部分内容阅读
由于黑棉土(粘土矿物含量较高的一种黑土)具有较强的水化膨胀特性,在土木工程项目建设中必须对其进行妥善处理,方能适用于路基建设。针对肯尼亚地区某建筑工程中的黑棉土,进行了相关土工测试,给出了自由膨胀率、液塑限、电导率、pH值、含水率及有机质含量的测试结果。选用氧化钙(CaO)、火山灰、氢氧化钙(Ca(OH)_2)、硫酸钙(CaSO_4)、九水偏硅酸钠(Na_2SiO_3·9H_2O)、氯化钠(NaCl)对其进行改性,表明CaO+火山灰改性黑棉土在上述土工指标上有明显改善。
Because black cotton soil (clay with a high content of black soil) has strong hydration expansion characteristics, civil engineering projects must be properly handled in order to be suitable for the construction of subgrade. Aiming at the black cotton soil in a construction project in Kenya, the related geotechnical tests were carried out and the test results of free expansion, liquid plastic limit, conductivity, pH value, water content and organic matter content were given. CaO, volcanic ash, calcium hydroxide (Ca (OH) 2), calcium sulfate (CaSO4), sodium silicate hydrate (Na_2SiO_3 · 9H_2O) and sodium chloride That CaO + volcanic ash modified cotton soil in the above-mentioned geotechnical indicators have significantly improved.