Abstract
The purpose of this study is to investigate the influencing factors for pozzolanic activity and material characteristics of calcined paper sludge. Calcined paper sludge (CPS) was produced by various parameters such as temperature and time of calcination, cooling methods, basicity and fineness, and its chemical and mineral characteristics were investigated using X-ray fluorescence (XRF) and X-ray diffraction (XRD) analyses. The pozzolanic activity of the CPS was also investigated by using an API (assessed pozzolanic activity index) test. From the results of XRD, new phases such as anorthite and gehlenite by crystallization of CAS appeared at CPS above 800 °C. These new phases have higher chemical and thermal stability than calcite or kaolinite. This may have a negative effect on the pozzolanic activity of CPS. The results of the API (%) test clearly showed that the pozzolanic activity of CPS was highest at a calcination temperature of 700 °C, a calcination time of 2 hours and the cooling method of water quenching.
| Original language | English |
|---|---|
| Pages (from-to) | 59-66 |
| Number of pages | 8 |
| Journal | Journal of the Korea Concrete Institute |
| Volume | 30 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2018 |
Keywords
- Calcination condition
- Calcined paper sludge
- Cooling method
- Material characteristic
- Pozolanic activity
Quacquarelli Symonds(QS) Subject Topics
- Engineering - Mechanical
- Materials Science
- Engineering - Civil & Structural
- Architecture
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