The fracture toughness the K-IIIc of concretes with F fly ash (FA) additive
Artykuł w czasopiśmie
MNiSW
40
Lista A
| Status: | |
| Autorzy: | Golewski Grzegorz Ludwik, Sadowski Tomasz |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2017 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 143 |
| Strony: | 444 - 454 |
| Web of Science® Times Cited: | 57 |
| Scopus® Cytowania: | 62 |
| Bazy: | Web of Science | Scopus | Web of Science Core Collection |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The aim of this study is elaboration of a new testing method and estimation of the fracture toughness in Mode III of concretes with F fly-ash (FA) additive. The applied specimens were cylinders with a circumferential notch at their halfheight, which are made of plain concretes with different volume content of the FA additive. In fact, the influence of the FA additive evidently changes the fracture toughness K-IIIc, like in case of pure shear K-IIc (Golewski and Sadowski 2014). Namely, 20% FA additive causes a small increase of the K-IIIc in comparison to the concrete without the FA, while 30% FA additive significantly decrease in the fracture toughness. The experimental program was completed by analysis of fracture surfaces of broken specimens. SEM observations indicate that the longest cracks in ITZ between paste and coarse aggregates took place in the concretes containing 30% FA. For 20% FA additive we observed significantly smaller crack lengths. The obtained results are significant in designing of any civil engineering structural elements subjected to the influence of torsion loading (where unstable cracking process leading to failure begins at K-III >= K-IIIc) or more complex stress states due to bending and torsion. (C) 2017 Elsevier Ltd. All rights reserved. |
