Effect of notch width on KIC for mortar and concrete

✍ Scribed by Sidney Mindess; John S. Nadeau

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 266 KB
• Volume: 6
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(76)90081-8

✦ Synopsis

Tests were carried out on mortar and concrete to determine whether the fracture toughness depends upon the length of the crack front. Notched beams were prepared with a constant length of 203.2 mm and depth of 50.8 mm, but with the width (length of crack front) varying from 45 to 254 mm. They were tested in 3-point bending to obtain KIC. It was found that within the range studied there is no dependence of fracture toughness upon the length of the crack front. The fracture toughness test described in ASTM E399-74 for metals appeared to be adequate for concrete also.

Se hicieron pruebas en mortero y hormig6n para determinar si la resistencia a la fractura depende de la longitud del frente agrietado. Vigas ranuradas fueron hechas con una longitud de 203.2 mmy profundidad constante de 50.8mmpero con ancho (frente agrietado) variable entre 45 y 254 mm. Estas vigas fueron probadas con flexion creada por 3 cargas concentradas para obtener KIC. Los resultados indican queen el entorno estudiado la resistencia a la fractura no depende de la Iongitud del frente agrietado. El ensayo para determinar resistencia a fractura descrito en ASTM E399-74 para metales luce ser adecuado tanWM6n para el hormigOn.