พลังงานการแตกหักของคอนกรีตที่มีส่วนผสมของมวลรวมหยาบชนิดต่างๆ

Abstract

Development of concrete properties; especially fracture properties, is of importance in order to prevent cracks in reinforced concrete pavement. This study aims to compare the fracture energy of concrete mixed with various coarse aggregate types. Fracture energy of concrete is examined by the wedge splitting test at the age of 3, 7 and 28 days. Five types of coarse aggregate: lime stone, granite, andesite, basalt and slag, and five gradation types are used. As a result, it is found that the concrete mixed with basalt has the highest fracture energy for every gradation type. In addition, the fracture energy increases as the size of coarse aggregate increases and the abrasion resistance increases.