Abrasion resistance of concrete containing surface cracks

摘要

This study evaluates concrete resistance of concrete specimens with abrasion in three crack patterns (0°, 45° and 90°), four surface crack widths (0.5, 1, 2 and 3 mm) and two silica fume (5% and 10%) contents. The ASTM C 944 was used to evaluate the abrasion resistance. The boundary element method (BEM) was used to analyze the stress distribution on concrete surfaces with/without cracks. Test results conclude that the abrasion resistance of test specimens containing 0°, 45° and 90° cracks and 1 mm crack widths showed a decrease of about 98%, 108% and 125%, respectively, as compared to specimen without cracks. The abrasion resistance loss of concrete with 90° cracks is lower than concrete with 0° cracks that have the same width and length. Moreover, concrete with silica fume additions can improve the abrasive resistance of specimens with surface cracks. The maximum concrete stresses based on BEM analysis, of specimens containing 0°, 45° and 90° cracks are 11, 26 and 34 times the stress on specimens without surface cracks.View full textDownload full textKeywordsabrasion resistance, surface cracks, silica fume, boundary element methodRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/02533839.2011.577606