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Research on closed-loop utilization of engineering waste mud in engineering sites


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Fig. 1.

(a) Waste engineering slurry; (b) Particle size distribution of solid clay particles in waste engineering slurry
(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
Changes in the volume of supernatant after mud-water separation with the mass concentration of different flocculants

Fig. 3.

Plot of settling time of samples after adding different flocculants
Plot of settling time of samples after adding different flocculants

Fig. 4.

Changes in volume and turbidity of supernatant over time
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
(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
Simulation diagram of flocculation mechanism of flocculants

Fig. 7.

Slump flow of different pre-mixed fluidized solidified soil
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
(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)
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
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
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

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%

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
eISSN:
2083-134X
Język:
Angielski
Częstotliwość wydawania:
4 razy w roku
Dziedziny czasopisma:
Materials Sciences, other, Nanomaterials, Functional and Smart Materials, Materials Characterization and Properties