A new concrete composites based on quaternary binder systems reinforced nanosilica with enhanced fracture toughness and reduced interfacial microcracks
Artykuł w czasopiśmie
MNiSW
70
Lista 2024
| Status: | |
| Autorzy: | Golewski Grzegorz Ludwik |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2025 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 6 |
| Wolumen/Tom: | 19 |
| Strony: | 545 - 557 |
| Impact Factor: | 3,2 |
| Efekt badań statutowych | NIE |
| Finansowanie: | The research leading to these results has received funding from the MINIATURA 2 Grant, No. 2018/02/X/ ST8/02726: funded by National Science Center of Poland. |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The use of basic Supplementary cementitious materials (SCMs) such as fly ash (FA) or silica fume (SF) due to their pozzolanic properties can change the fracture parameters and structure of the Interfacial Transition Zone (ITZ) between the aggregates and the paste. The combined use of SCMs in combination with very active fine particles of nanoadditives, such as nanosilica (NS), can also bring clear benefits in this regard. From above reasons this study investigated the effect of combined use FA, SF, and NS on the main fracture characteristics and width of microcracks (Wc) of concrete composites based on quaternary binder systems. For this purpose, a part of ordinary Portland cement (OPC) was replaced with FA+SF+NS in volume of 3 different percentages. The following composition of the new composites, based on quaternary binder systems, has been assumed: constant SF content, equal to 10%, and NS in the amount of 5%, whereas variable FA content, the amount of which was respectively: 0, 5 and 15%. The main experiment in this research was three-point bending tests that were performed on notched beams. Fracture toughness was determined using critical stress intensity factor K_"Ic" ^S. In addition, the manuscript contains analyses of Wc occurring in the ITZ area of concretes reinforced NS. On the basis of the obtained test results it can be concluded that the proposed modification of the binder composition in the analyzed materials clearly leads to: homogenization of the composite structure, increasing their fracture toughness, and limitation of initial internal microcracks in concrete. |
