摘要
利用一种生物酶类土壤固化剂——派酶,以适当比例掺入两种配合比的压实三合土中,测得其28d无侧限抗压强度均比未掺派酶时有所提高.在石灰掺量较高的情况下,掺派酶后三合土土体的28d无侧限抗压强度仍比未掺派酶时有较大幅度的提高,说明在具有抑制和杀灭细菌的较高碱度环境下,派酶对土体结构的增强作用不是因为其单纯地促进土壤中存在的各种菌类活动所引起的.掺派酶三合土的X射线衍射分析图谱横坐标28°附近位置出现明显超过未掺派酶三合土的强峰,不能排除派酶的掺入会促进土体固化过程中某种晶型变化产生的可能性.SEM显微结构形貌图片显示掺派酶三合土试件的微结构比未掺派酶试件更紧凑、密实.基于分形几何理论研究发现,派酶的掺入促进了三合土土体中细小孔隙增多,大孔隙减少,有利于土体中颗粒间相互作用力的增强.
Two types of compacted tabia were mixed with Perma-zyme in proper proportion. The 28 d un- confined compressive strengths of them were higher than those without Perma-zyme. The 28 d unconfined compressive strength of compacted tabia with Perma-zyme added and higher use level of lime was higher than the others. Strong base environment with high pH value can strain and even kill bacteria. It is indica- ted that promotion of the soil bacteria to be more activated is not the only factor for Perma-zyme as an en-zymatic stabilizer to improve the compressive strength of compacted tabia. The XRD pattern of compacted tabia treated with Perma-zyme shows that there is a stronger diffraction peak than that without Perma-zyme added occurring at near 28°of abscissa. The possibility of some crystal form changes caused by Per-ma-zyme in tabia could not be excluded. Scanning electron microscopy revealed that the microstructure of the tabia treated with Perma-zyme became more dense. It is found based on fractal analysis that the com-pacted tabia with Perma-zyme added contains smaller pores and less large pores than the one without Per-ma-zyme added, and Perma-zyme is helpful to increase interaction between particles of the compacted tabia.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2012年第3期372-376,共5页
Journal of Building Materials
基金
2011年财政部"公益性科研院所基本科研业务费专项资金"项目(jbky-2011-9-1)
关键词
派酶
三合土
无侧限抗压强度
盒维数
Perma-zyme
tabia
unconfined compressive strength
box-counting dimension
