Economic and Environmental Geology

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Table. 2.

Table. 2.

The compressive strength of recycling cement according to the mixing ratio of several materials

Sintering temperature (°C) Sintering duration (h) Mixing ratio (wt%) W/B
(Water/
Binder
ratio)
Compressive strength (MPa) References
Waste concrete powder Portland cement Fine aggregate Gypsum Sodium silicate 7-day curing 28-day curing
700 2 90 - - 10 0.6 - 2.0 Min et al., 2009
80 10 - 10 3.6
700 1 97 - - 3 - 0.6 2.0 1.5 Ahn and Park, 2013
- - 30 10 45 - - Water 15 wt% - 4.3 Lee et al.,2013
22.5 52.5 5.0
15 60 4.3
7.5 67.5 5.2
0 - 96 - - 4 - 0.6 6.1 10.8 Mun et al., 2017
500 15.0 22.0
600 21.3 30.8
700 14.9 19.9
800 1.9 20.3
900 5.9 14.7
- - 33 67 - - 0.6 - 12.2 Koo et al., 2018
36 64 12.5
- 38 62 - - 17.2
Econ. Environ. Geol. 2021;54:285-97 https://doi.org/10.9719/EEG.2021.54.2.285
© 2021 Econ. Environ. Geol.