LIGHTWEIGHT FOAMED CONCRETE for Roads and Geotechnical Applications

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Presentation transcript:

LIGHTWEIGHT FOAMED CONCRETE for Roads and Geotechnical Applications EABASSOC LIGHTWEIGHT FOAMED CONCRETE for Roads and Geotechnical Applications

EABASSOC LIGHTWEIGHT FOAMED CONCRETE Made from Sand, Cement, Water & Foam Dry Densities from 400 to 1600 kg/m3 Compressive Strengths from 1 to 15 MPa Mix Designs chosen to optimise density, strength and cost

Advantages of Foamed Concrete Lightweight...does not impose large loadings Does not settle Free flowing Enables Fast Work Excellent load spreading characteristics Reliable quality control Once placed requires no maintenance Low water absorption over time Resistance to freeze-thaw cycle Non-Hazardous

Typical Uses for Roads Trench Reinstatement Road Widening (Sub-Base) Road Building on Soft Ground (Sub-Base) Road Repairs Bridges over Drainage Channels

Road Widening

Road Sub-Base

Principle of Roads on Soft Ground Soft Ground = X kg Soft Ground Wearing Course = Y kg Foamed Concrete Road Base = Z kg Y X + Z =

Road on Soft Ground - example Density of road = 1050 kg/m3 Concrete Foamed Concrete Peat Density (kg/m3) 2400 650 1200 0.12m 0.40m

Bridges over Drainage Channels

Bridges over Drainage Channels

Bridges over Drainage Channels

Bridges over Drainage Channels

Geotechnical Applications Landslide Repair Soil Stabilisation Bridge Abutments (on soft ground) Emergency Void Filling Mine Fill Land Reclamation Tunnelling

Landslide Repair Nagano Expressway, Japan Retaining Wall Wall (8m) Hillside A = 0.4m B = 0.3m 27 m New Plan Foamed Concrete 650 kg/m3 Original Plan Traditional Materials 80m x 50m x 9m Landslip A = Road Surface Layer B = Basecourse Terraces

Hillside Stabilisation

Hillside Stabilisation

Hillside Stabilisation

Hillside Stabilisation

Cathedral at Gniezno, Poland

Cathedral at Gniezno, Poland

Cathedral at Gniezno, Poland

Cathedral at Gniezno, Poland Foamed Concrete Mix Design sand : cement : water 1.4 : 1 : 0.6 Dry density 900 kg/m3

Bridge Abutment

Bridge Abutment

Emergency Void Fill, Heathrow

Mine Fill

EABASSOC LIGHTWEIGHT FOAMED CONCRETE Made from Sand, Cement, Water & Foam Dry Densities from 400 to 1600 kg/m3 Compressive Strengths from 1 to 15 MPa Road Widening, Sub-Bases, Repairs Soft Ground Ground Stabilisation Emergency and Planned Void Filling