早期固化派酶土体显微形貌与其无侧限抗压强度的关系  

The relation between micrograph and unconfined compression strength of soil stabilized with Perma-zyme at the early curing stages

作　　者：彭红涛[1] 郭亮 孙延忠 姚新宇[1] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]大连高新技术产业园区社会事业管理局,辽宁大连116025 [3]中国文化遗产研究院,北京100029

出　　处：《功能材料》2010年第A03期533-535,539,共4页Journal of Functional Materials

基　　金：中央高校基本科研业务费专项资金资助项目(2009-3-11);"十一五"国家科技支撑计划资助项目(2008BADC4B03)

摘　　要：利用一种生化酶类土壤固化剂派酶,按适当比例掺入壤黏土,测得其各龄期试件无侧限抗压强度均比未掺的有所提高。为了进一步研究早期固化派酶土体显微结构形貌与其强度的关系,对7、14d龄期的掺与未派酶固化土体试样进行SEM电镜扫描。早期固化掺与未派酶土体中的7dSEM照片(40μm)很难直接观察定性分析,进而采用分形理论,计算出早期固化龄期(7、14d)未掺派酶试件显微结构形貌的盒维数均比掺派酶的大,龄期相同时盒维数大的试件无侧限抗压强度低。龄期从7d增至14d,掺与未掺派酶试件显微结构形貌的盒维数变小而无侧限抗压强度却有所提高。The clay loam specimens were stabilized with Perma-zyme in proper proportion. The unconfined compression strengths of specimens are higher than those without Perma-zyme at the early curing stages. To investigate the relation between micrograph and strength of the soil stabilized with Perma-zyme at the early curing stages, the micrographs of the specimens and the specimens without Perma-zyme were studied in scanning electron microscopy（SEM） at 7, 14d of age. The SEM micrographs（40μm） of the specimens and the specimens without Perma-zyme are difficult to complete the qualitative analysis from direct observation. Fractal dimension values of SEM images were computed by box-counting. Fractal dimension values of SEM images of the specimens without Perma-zyme are larger than those stabilized with Perma-zyme at 7, 14d of age. The unconfined compression strength of specimen with larger fractal dimension value is lower at the same early curing stage. When unconfined compression strength of the specimen increases, the fractal dimension value decreases as the curing age increases from 7 to 14d.

关 键 词：早期固化 派酶 显微结构形貌 强度 分维 

分 类 号：TU599[建筑科学—建筑技术科学]