Threepoint flexural testing was carried out using an Instron Universal Testing Machine, with a span of 180 mm and cross-head, bearer diameter of 25 mm and loading speed of 5 mm/min.
Threepointflexural testing was carried out using an Instron UniversalTesting Machine, with a span of 180 mm and cross-head, bearerdiameter of 25 mm and loading speed of 5 mm/min.