Komsun SiripunDepartment of Civil Engineering

Sustainable Use of Crushed Concrete Waste as A Road Base Material

Aims

2.Why?

1.What?

3.How?

Questions Solutions1 2 3

1.What happens?

2.Why it happens?

3.How to solve?

Sustainable Use of Crushed Concrete Waste as A Road Base Material

What happens?

Construction and Demolition Materials

Questions Solutions1 2 3

Why it happens?

Construction and Demolition Materials

Questions Solutions1 2 3

-Structure Concrete

-Other Concrete and pavers

-Timber

-Brick and Tile

-Reinforced Steel

-Plastic

How to solve?

Construction and Demolition Materials

Questions Solutions1 2 3

How to solve?

Pavement structure behaviour

How to solve?

The C & D Recycling compaction curve

Questions Solutions1 2 3

How to solve?

Particle size distributions for recycled materials

Questions Solutions1 2 3

Cyclic/static Load

How to solve?

Repeated load triaxial

(RLT)

Static Load

How to solve?

RLT finite element analysis

How to solve?

Modulus vs. quarried roadbase

materials

Questions Solutions1 2 3

How to solve?

Questions Solutions1 2 3

Modulus vs. quarried roadbase

materials

How to solve?

Questions Solutions1 2 3

Curing effect of C&D material

How to solve?

Pavement structure modelling

Asphalt

Base

Subbase

Design load

Certain depth

Subgrade

allowance

2

1

Material properties+

40 mm AsphaltE=3000 MPa,μ=0.4

150 mm Base courseCRB, E=750MPa, μ=0.35

200 mm Subbase courseCrushed lime stoneE=350 MPa, μ=0.35

SubgradeE=150MPa, μ=0.35

Pavement Cross-section

Layer No. Material ID Modulus(MPa)

Layer thickness(mm)

1 Asphalt 3000 40

2 C&D material 750-1000 150-350

3 Crushed limestone 350 200

4 Subgrade CBR 15 150 Vary

How to solve?

Material parameter input

How to solve?

Multi-layer Finite element analysisApplied load of 75 kPa

Applied load of 750 kPa

Asphalt

Base

Subbase

Design load

Subgrade

allowance

Thank you

Thank you for your attention!