innovative integrated methodology for the use of decontaminated river sediments in road...
DESCRIPTION
INNOVATIVE INTEGRATED METHODOLOGY FOR THE USE OF DECONTAMINATED RIVER SEDIMENTS IN ROAD CONSTRUCTION. Preliminary Results. Dott. Ing. Pietro Leandri Dott. Ing. Patrizia Rocchio. Prof. Ing. Massimo Losa. SUMMARY. SCENARIO CRITERIA FOR REUSE OF SEDIMENTS IN ROAD CONSTRUCTION - PowerPoint PPT PresentationTRANSCRIPT
INNOVATIVE INTEGRATED METHODOLOGY FOR THE USE OF DECONTAMINATED RIVER SEDIMENTS IN ROAD CONSTRUCTION
Prof. Ing. Massimo LosaDott. Ing. Pietro LeandriDott. Ing. Patrizia Rocchio
Preliminary Results
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
SUMMARY
1. SCENARIO
2. CRITERIA FOR REUSE OF SEDIMENTS IN ROAD CONSTRUCTION
3. PROJECT OBJECTIVES
• Characterization of dredged sediments for the evaluation of the use as a structural material in road construction
• Implementation of the road construction demonstration field
4. FIRST PHASE ACTIVITIES
• Sediment characterization
5. RESULTS
Pisa, 03 Aprile 2014
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
DREDGING
dredged sediments
STORAGE of sediments in a confined area
storage site
MANAGEMENT of polluted dredged sediments for use in road construction
DEWATERING
DE-CHLORIDIZATION
SCENARIO
Navicelli canal
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
Large volumes of sediments are dredged in Europe in order to maintain harbour activities
Road construction begins with the removal of earth and rock, construction of embankments, filling with sand or a sand-rich mixture with fine gravel
The potential use of dredged river sediments as filling material for road building will be investigated on lab scale and on demonstration field
SCENARIO
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
PROJECT OBJECTIVES
Implementation of the road construction demonstration field by utilizing treated sediments as a fill material for road building
Cross section
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
PROJECT OBJECTIVES
Characterization of dredged sediments for the evaluation of the use as a structural material in the road construction
Materials for road construction purposes requires checking specific criteria
A1, A2-4 ,A2-5, A3A2-6 A2-7
A4, A5, A6 stabilization with lime/cement
CNR UNI 10006 groups:
• Definition of the most appropriate mixture(s) of decontaminated dredged sediments and other standard materials• The treated sediments will be applied in different proportions and percentages, in order to demonstrate the wide range of possible features and applications
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
EXPERIMENTAL PROGRAM
LABORATORY TESTS :• Water content• Soil classification (CNR UNI 10006/02)• Presence of organic matter (UNI EN 1744-1)• Mix design by gyratory compactor and
measuring of tangential stress→(influence of the addition of sediments on the thickening of the mixtures)
• Mechanical tests (resistance to compression with free lateral expansion, CBR index before/after saturation, etc)
Sample before and after dewatering process
Next trial
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
EXPERIMENTAL PROGRAM
• Soil classification (CNR UNI 10006):Particle size distributionPlasticity index (IP=LL-LP)
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
EXPERIMENTAL PROGRAM
• Determination of organic components affecting curing of cement (UNI EN 1744-1)→ Humus contentThe method is based on the principle that humus develops a dark colour when it reacts with sodium hydroxide(NaOH). The intensity of the colour depends on the humus content. The test solution is compared with the reference solution.
• Water content (%):
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
RESULTS
SAMPLE ID
1 Sabbioso- argilloso Media contaminazione
2 Sabbioso Bassa contaminazione
3 Argilla- limo Media contaminazione
4 Incile5 Vasca6 Draga
“Innovative integrated methodology for the use of decontaminated river sediments in plant nursing road construction”
CLEANSED - LIFE 12 ENV/IT/000652
Pisa, 03 Aprile 2014
RESULTS
Sample ID 1 2 3 4 5 6
%pass 2.0 mm 93.5 86.5 91.5 96.6 96.3 97.6
%pass 0.4 mm 86.5 68.6 84 90.8 91.4 84.6
%pass 0.075 mm 30.4 13.1 65.3 87.6 70 40.7
LL 27 26 42 54 30 27
LP 15 n.d. 26 29 15 18
IP 12 n.d. 16 52 15 9
IG 0.3 0 8.8 16.8 9.0 1.1
Water content (%) 97.0 169.4 65.0 42.5 - 57.8
ClassificazioneCNR UNI 10006 A2-6 A2-4 A7-6 A7-6 A6 A4
Organic components Yes/No No Yes Yes/No Yes Yes