CAJ | 학술논문

在商用高岭土、膨润土与商业黄砂混合物中加入硝酸铅溶液，添加水泥和石灰两种固化剂，采用室内压实制样方法获得固化的铅污染土试样。进行干、湿循环试验，测试固化体的质量损失和无侧限抗压强度等参数随干、湿循环次数的变化规律，评价固化铅污染土的干、湿耐久性。测试结果表明，本试验8种配比的试样都满足干、湿循环的要求；黏土矿物为膨润土的试样干、湿循环耐久性比黏土矿物为高岭土的试样要差；水泥固化土的干、湿循环耐久性要略优于石灰固化土；加入8000 mg/kg的铅可略增大土体的抗干、湿循环耐久性。水泥和石灰固化/稳定化重金属污染土时，土体中含水率是保证加固效果的关键参数之一。土体中含水率应能满足固化剂充分水化、水解、火山灰和碳酸化反应之需要。
재상용고령토、팽윤토여상업황사혼합물중가입초산연용액，첨가수니화석회량충고화제，채용실내압실제양방법획득고화적연오염토시양。진행간、습순배시험，측시고화체적질량손실화무측한항압강도등삼수수간、습순배차수적변화규률，평개고화연오염토적간、습내구성。측시결과표명，본시험8충배비적시양도만족간、습순배적요구；점토광물위팽윤토적시양간、습순배내구성비점토광물위고령토적시양요차；수니고화토적간、습순배내구성요략우우석회고화토；가입8000 mg/kg적연가략증대토체적항간、습순배내구성。수니화석회고화/은정화중금속오염토시，토체중함수솔시보증가고효과적관건삼수지일。토체중함수솔응능만족고화제충분수화、수해、화산회화탄산화반응지수요。
Kaolin and bentonite, two clay minerals are mixed with sand respectively, and then mixed with lead nitrate to produce artificial lead-contaminated soils. Cement and lime are used to solidify the artificial lead-contaminated soils respectively. The samples are made using the compaction method. The relative mass loss, cumulative mass loss rate and unconfined compression strength (UCS) of samples after wetting-drying cycle tests are recorded, in order to evaluate the wetting-drying cycles durability of the solidified lead-contaminated soil. The results show that the wetting-drying cycles durability of samples in this study all meet the requirement;wetting-drying cycles durability of bentonite mixed soil is worse than kaolin mixed soil;cement solidified soil performs better than lime solidified soil in terms of wetting-drying cycles durability; admixing 8 000 mg/kg lead slightly leads to an enhancement of wetting-drying durability of stabilized soils. Water content is a key parameter to immobilize heavy metal in cement or lime, and enough water should be available for hydration, hydrolysis, pozzolanic and carbonization reactions of cement or lime.