Mathieu HENRY Centre Terre et Pierre, Tournai (Belgium)
C ENTRE T ERRE ET P IERRE • CTP: mineral processing expertise including grinding, classification and separation
D RY TREATMENT OF SOILS • Combination of sieving, drying and disagglomeration to create a bicycle path in concrete with sediment Sieving Refusal Exogenous: stones, bottles, glass, wood Passing Disagglomeration Drying • Aim: substituting sand by sediments (max: 50%) in concrete formulation 3
T HERMAL TREATMENT Pilot calcining Unit Rotating dryer 2 stages pilot rotary Laboratory cement kiln rotary kiln 4
W ET TREATMENT OF SOIL Filter press Flocculation Tank -3 mm; +250 µm n°1 Dec. Curved n°3 -250µm screen -15 µm -15µm Tank -63µm Hydrocyclone n°2 Tank +3 mm 15µm Dec. n°3 Vibrating n°1 -63;+15µm screen Hydrocyclone 63 µm Trommel Flotation Screw -250; +63 µm classifier Dec. Feed n°2 hopper Input Spirals -63; +15 µm Attrition 5
R EMOVAL OF EXOGENOUS AND COARSE SAND 1,2 t/h DM 40-80% DM Input Exogenous: +3 mm Coarse sand: 1,2 t/h DM -3 mm;+250 µm -2 mm 30-40% DM 1,2 m 3 /h 10-20 % DM -250 µm 6
R EMOVAL OF FINE SAND -250 µm -63 µm 1,2 m 3 /h DM: 10-40% 0,8 m 3 /h DM: 10-40% Fine sand: -250; +63µm 7
S EPARATION OF SILT AND CLAY 32 m 3 ; 0,5 m³ /h 30 plates 800 x 800 mm; 15 bar 0,8 m 3 /h; DM: 5-30% 0,5 m³ /h; 1 ton DM/batch -63µm -15µm (clay and silt) Silt: -63;+15µm 0,8 m 3 /h 2 x 5 m 3 DM: 15-40% 8
S OILS S OLIDIFICATION /S TABILIZATION • Aim: encapsulate pollutants to avoid their liberation in the environment • Overall by adding chemicals or secondary materials (lime, slag, fly ash, H 3 PO 4 ,…) • Characterization: PSD, chemical analysis Mixing Optimum Proctor IPI Leaching tests 9
Thank you for your attention Centre Terre et Pierre asbl Chaussée d'Antoing, 55 B-7500 Tournai, Belgique Mathieu HENRY T: +32 (0)69 88 42 31 Chercheur F: +32 (0)69 88 42 59 mathieu.henry@ctp.be www.ctp.be
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