Influence of sand angularity on standard test for strand bond

[摘要] This project explored the influence of sand angularity on ASTM A1081, Standard Test Method for Evaluating Bond of Seven-Wire Steel Prestressing Steel Strand. The procedure specified by ASTM A1081 uses only fine aggregate in the mixture proportions. Sand angularity is a variable of interest because it could affect strand acceptance and the reliability of the ASTM A1081 strand bond test. Four sands were tested, each of which was subjected to a full ASTM A1081–style test. In addition, the angularity of each sand sample was tested via two different methods the ASTM C1252 procedure and a visual process guided by ASTM D2488 that included the use of a scanning electron microscope and an optical digital microscope system. Ultimately, it was determined that the angularity of the sand does influence the strand bond. This influence is generally not pronounced enough to cause a strand to fail the ASTM A1081 test.

[学科分类] 建筑学

[关键词] 2017;201703;PCI Journal;Article;April;March;Year;Publications;J2017;Journal;Pubs;Name;Type;Month