Abstract
The purpose of this study is improving the strength of the cemented paste backfill. Also the effect of blast furnace slag (BFS) was investigated on short - term mechanical properties of CPB. In this study, CPB samples were prepared by 9% portland cement and also 25%, 50% and 75% of the cement were replaced with BFS. The paste materials prepared according to the value of 180 mm slump were cast into cylinder molds. The uniaxial compressive strength (UCS) and Ultrasonic P-Wave Velocities tests were performed. The maximum values of UCS 0.80, 1.70 and 3.03 MPa respectively at 3, 7 and 14 curing period were obtained from 25 wt% BFS added samples. 25%wt. BFS showed a strength of 1.79 times in the 7 days cure period and 2 times in the 14 day cure period according to the reference cemented samples. On the contrary, substitution of 50 and 75 wt.% BFS were reduced strength of CPB samples. Ultrasonic pulse velocity of cemented paste backfill showed similar trend with UCS. But, substitution of 25, 50 and 75 wt.% BFS were below the values of reference samples. The maximum values of UCS are 25% additive BFS. This situation directly affects the cost of CPB due to reduces the cement ratio.
| Original language | English |
|---|---|
| Title of host publication | 2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference |
| Publisher | Society for Mining, Metallurgy and Exploration |
| ISBN (Electronic) | 9781510884663 |
| Publication status | Published - 2019 |
| Externally published | Yes |
| Event | 2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference - Denver, United States Duration: 24 Feb 2019 → 27 Feb 2019 |
Publication series
| Name | 2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference |
|---|
Conference
| Conference | 2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference |
|---|---|
| Country/Territory | United States |
| City | Denver |
| Period | 24/02/19 → 27/02/19 |
Bibliographical note
Publisher Copyright:Copyright © 2019 by SME.
Funding
This study was funded by number FDK-2018-24707. This study was funded by Istanbul University with the project number FDK-2018-24707.
| Funders | Funder number |
|---|---|
| Istanbul Üniversitesi | FDK-2018-24707 |