CAJ | 학술논문

通过对比电石渣和生石灰物理化学特征的异同，提出采用电石渣稳定过湿黏土作为路基填料。通过改良填料路用承载性能的现场试验，对比研究2种改良填料的土基CBR、回弹模量（Mr）、贯入阻力（Rs）和动力锥贯入指数（DCPI）等力学指标在养护龄期内的变化规律。试验结果表明：电石渣相对生石灰比表面积大、细粒含量高，在相同掺量和养护条件下更利于填料中改良反应的进行，可以更有效地改善过湿黏土填料的路用力学性能；电石渣改良填料的DCPI与其CBR和Mr的相关性更高；同时，电石渣较石灰具有明显的成本优势，并具有施工不扬尘、CO2排放少等社会环境效益。电石渣稳定过湿黏土路基填料具有良好的工程应用前景。
통과대비전석사화생석회물이화학특정적이동，제출채용전석사은정과습점토작위로기전료。통과개량전료로용승재성능적현장시험，대비연구2충개량전료적토기CBR、회탄모량（Mr）、관입조력（Rs）화동력추관입지수（DCPI）등역학지표재양호령기내적변화규률。시험결과표명：전석사상대생석회비표면적대、세립함량고，재상동참량화양호조건하경리우전료중개량반응적진행，가이경유효지개선과습점토전료적로용역학성능；전석사개량전료적DCPI여기CBR화Mr적상관성경고；동시，전석사교석회구유명현적성본우세，병구유시공불양진、CO2배방소등사회배경효익。전석사은정과습점토로기전료구유량호적공정응용전경。
A comparison of the physico-chemical properties of calcium carbide residues (CCR)and quicklime suggests that over-wet clayey soils stabilized by CCR is potentially used as highway sub-grade materials.A field investigation on the mechanical performance of the CCR stabilized over-wet clayey soils is conducted.The effects of the curing time on the California bearing ratio (CBR),the resilient modulus (Mr ),the penetration resistance (Rs ),and the dynamic cone penetration index (DCPI)of the CCR and quicklime stabilized soils are discussed.The results show that the CCR ex-hibit larger specific surface area and higher fine-particle content than the quicklime,which is more in favor of the evolution of pozzolanic reactions between the binder (i.e.,CCR or quicklime)and soils.Compared with the quicklime stabilized soils,the CCR stabilized soils have greater perform-ance in terms of higher CBR,greater resilient modulus and penetration resistance,and higher degree of correlation between DCPI and CBR and that between DCPI and Mr.In addition,CCR has evident benefits in terms of its cost-effectiveness,no dust pollution and little CO2 emission during the con-struction.It is concluded that CCR is a viable,economical,and environmental-friendly binder in stabilizing over-wet clayey soils,which are used as subgrade materials.