Rupture Strength and Irregularity of Fracture Surfaces

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Ficker, Tomá^1

Brno University of Technology, Faculty of Civil Engineering, Veveí 95, Brno

CZ-602 00, Czech Republic^1

关键词: Analytical relations;    Capillary porosity;    Cement based material;    Empirical formulas;    Hydrated cement pastes;    Surface irregularities;    Technical literature;    Water to cement (binder) ratios;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/3/032009/pdf
DOI  :  10.1088/1757-899X/245/3/032009

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Textural irregularities of fracture surfaces of cement-based materials seem to be an interesting source of information on some mechanical properties. Besides compressive strength, the flexural strength is strongly correlated with height irregularities (i.e. roughness) of fracture surfaces of hydrated cement pastes. This correlation has been a subject of experimental study. An analytical relation between flexural strength and height irregularities has been inferred. The formula contains height parameters, which represent basic descriptors of surface irregularities of fracture surfaces of cement pastes. These irregularities are governed by the capillary porosity of cement pastes with different water-to-cement ratios. The relation yields values that are in agreement with the empirical formula published in the technical literature.