Fracture Response of Fine-Grained Cement-Based Composite Specimens with Special Inclusions

conference paper

English

This paper concerns research into the importance of the interfacial transition zone around inclusions of selected materials in fine-grained cement-based composite. Tests were performed on eight sets of prismatic test specimens. The sets differed in the inclusion materials used, which were placed at midspan above the initial central edge notch. The first was a reference set without any inclusion, the second contained a steel inclusion, four more contained different types of rock inclusion, the seventh contained an inclusion of extruded polystyrene, and the last contained a space of the same dimensions as that occupied by the inclusions in sets 2 to 7. The test specimens were subjected to three-point bending fracture tests at the age of (usually) 28 days. The fracture response was analysed by means of fracture mechanics theory, and apparent mechanical fracture parameters (modulus of elasticity, fracture toughness and fracture energy) were evaluated. The conclusion shows that a possible relationship exists between the differences in the mechanical fracture parameters of specimens with/without an inclusion and the existence of the interfacial transition zone.

Fine-Grained Cement-Based Composite, Fracture Test, Polystyrene Inclusion, Rock Inclusion, Steel Inclusion.

VYHLÍDAL, M.; ROZSYPALOVÁ, I.; MAJDA, T.; DANĚK, P.; ŠIMONOVÁ, H.; KUCHARCZYKOVÁ, B.; KERŠNER, Z.

19. 6. 2019

Trans Tech Publications

Switzerland

978-3-0357-1459-3

Solid State Phenomena: 25th Concrete Days 2018

1662-9779

Solid State Phenomena

292

Swiss Confederation

63

68

6