Fig. 1.
(a) Waste engineering slurry; (b) Particle size distribution of solid clay particles in waste engineering slurry
Fig. 2.
Changes in the volume of supernatant after mud-water separation with the mass concentration of different flocculants
Table 1.
Samples with different flocculants added
| Samples | 1.0% PAC | 0.3% APAM |
|---|---|---|
| Original mud | Water 10ml | |
| A | 10ml | / |
| B | / | 10ml |
| C | First add 10ml of PAC, stir for 10s, and then add 10ml of APAM | |
| D | 10mlPAC+10ml APAM | |
| E | First add 10ml of APAM, stir for 10s, and then add 10ml of PAC | |
Table 2.
Mix-ratio of fluidized solidified soil
| Samples | Soil type | Soil (kg) | Cement (kg) | Water (kg) | Water type | Flocculant as a percentage of cement (%) |
|---|---|---|---|---|---|---|
| 1 | No flocculant | 10 | 0.5 | 3 | Tap-water | 0 |
| 2 | No flocculant | 10 | 0.5 | 3 | Supernatant with PAC+APAM | <0.1% |
| 3 | Add PAC | 10 | 0.5 | 3 | Supernatant with PAC | ~8.0% |
| 4 | Add APAM | 10 | 0.5 | 3 | Supernatant with APAM | ~2.4% |
| 5 | Add PAC+APAM | 10 | 0.5 | 3 | Supernatant with PAC+APAM | ~10.4% |
Fig. 3.
Plot of settling time of samples after adding different flocculants
Fig. 4.
Changes in volume and turbidity of supernatant over time
Fig. 5.
(a) Separation effect of the combined flocculants with different addition sequences; (b) Separation effect of different slurries mixed with the same composite flocculant
Fig. 6.
Simulation diagram of flocculation mechanism of flocculants
Fig. 7.
Slump flow of different pre-mixed fluidized solidified soil
Fig. 8.
(a) unconfined compressive strength and (b) water softening coefficient of the fluidized solidified soil
Fig. 9.
Microscopic morphology and XRD spectra of 1 fluidized solidified soil with no flocculants (a, b) and 5 fluidized solidified soil with flocculants (c, d)
Fig. 10.
Engineering demonstration application flowchart
Fig. 11.
Engineering Demonstration Application of Fluidized Solidified Soil on Project Sites; (a) The site for drying the sediment; (b) Measurement and transportation of sediment; (c) Mixer; (d) Fluidized solidified soil discharge; (e) Pumping pouring; (f) Self-leveling of fluidized solidified soil; (g) Curing and shaping