Macrodefects and Microdefects within Porous Cement Pastes

[摘要] It is shown that the mechanical strength of cement matrix (hydrated cement paste) is a result of competitive interplay between macrodefects and microdefects. The dominance of one of these two kinds of defects depends not only on their sizes but also on their numbers. The cross-over between dominances of macrodefects or microdefects is determined both by a critical number of defects and by their critical size, which depends on the mechanical parameters of the materials.

[发布机构] Brno University of Technology, Faculty of Civil Engineering, Veveí 95, Brno; CZ-602 00, Czech Republic^1

[学科分类] 土木及结构工程学

[关键词] Cement matrix;Cement paste;Critical numbers;Critical size;Hydrated cement pastes;Macrodefects;Mechanical parameters;Micro-defects