湖南大学学报（自然科学版）2016，Vol.43Issue(12)：56-61,6.
固化湖泊淤泥烧结砖的性能与微结构∗
Performance and Micro-structure of Fired Bricks Made of Solidified Lake Silt
摘要
Abstract
Lake silt and solidified lake silt were used as the main raw materials to prepare fired brick samples em-ploying the vacuum plastic extrusion in a laboratory scale study.Raw material properties tests showed that the addi-tion of a small amount of solidified agent had limited influence on the plasticity index,oxide composition and mineral composition,but had some influence on the formability.Linear drying shrinkage,water absorption,bulk density, compressive strength,thermal conductivity and freeze-thaw resistance of two kinds of brick samples were tested.The test results showed that linear drying shrinkage of solidified silt brick samples with 90%solidified silt and 10%cinder was 5.42%,water absorption was 18.2% and compressive strength was 15.8 MPa.The overall performance of the fired brick samples made of solidified silt was slightly worse than that of the fired brick samples made of lake silt.In addition,SEM and MIP were used to examine the microstructural properties of brick samples,and the results demon-strated that the micro-structure of bricks made of solidified lake silt was more loose,and the porosity was higher thanthose of the bricks made of lake silt at the same dosage of cinder,which play an important role in the performance of the brick samples such as compressive strength and water absorption.Meanwhile,the thermal conductivity of the for-mer was slightly lower,and freeze-thaw resistances of the both bricks were almost similar.关键词
湖泊淤泥/固化淤泥/烧结砖/微结构/强度Key words
lake silt/solidified lake silt/fired brick/microstructure/strength分类
建筑与水利引用本文复制引用
张亚梅,贾鲁涛,崔强,梅浩,张培根,孙正明..固化湖泊淤泥烧结砖的性能与微结构∗[J].湖南大学学报（自然科学版）,2016,43(12):56-61,6.基金项目
国家自然科学基金资助项目(51378115),National Natural Science Foundation of China(51378115) （51378115）
