E-Waste USED IN CONCRETE

Raffic ahamed .MNaveen .T.R

What Is It?• Rapid growth of technology, up gradation

of technical innovations, and electronics industry have led to one of the fastest growing waste streams in the world . Electronic waste such as:

• Refrigerator, Washing machines, Computers and Printers, Televisions, Mobiles, Ipods etc.

COMPOSITION OF E-WASTE

• Ferrous & Non-ferrous Metals Plastics, Glass, Wood etc.

• Iron & Steel - 50%• Plastics - 21%• Non-ferrous metal - 13% • Mercury, Arsenic, Lead etc.

E-WASTE GENERATION IN INDIA• There are 10 states that contribute to 70% of the total E-

Waste generated in the country. • 65 cities generate more than 60% of the total E-Waste in

India. • Among the top ten cities generating E-Waste, Mumbai ranks

first followed by Delhi, Bengaluru, Chennai, Kolkata, Ahmedabad, Hyderabad, Pune, Surat & Nagpur.

• Main source of electronic waste in India are the government, public and private (Industrial) sectors - 70%

• Contribution of individual house hold - 15% • Rest being contributed by manufacturers.

PROPERTIES OF COARSE AGGREGATE

• Ordinary crushed stone with size 20mm was used as coarse aggregate in concrete mixes.

• The essential qualities of a good stone showing very high crushing strength, low absorption value and least porosity.

• The water may affect concrete setting time, strength, shrinkage or promote corrosion of reinforcement.

REPLACEMENT OF COARSE AGGREGATE

• E-waste was collected locally from a PCB cutting unit in the form of long chips.

• Copper strips present at the bottom of PCB were removed manually and broken in to 20mm size.

TEST RESULTS

• Specific gravity and water absorption were tested for E-waste.

PROPERTIES FINE AGGREGATE COARSE

AGGREGATEE - WASTE

Specific gravity 2.6 2.74 1.9

Water absorption (%)

1.2 0.05 0.2

Color Dark Dark Dark and ivory

shape - Angular Angular

PREPARATION OF THE SPECIMEN

• Preparation of concrete specimens aggregates, cement and E-waste are added.

• After thorough mixing, water was added and the mixing was continued until a uniform mix was obtained.

COMPARATIVE TEST RESULTS

S.NOPROPORTION OF E-WASTE

ADDED(%)

COMPRESSIVE STRENGTH(N/mm²)

SPLIT TENSILE STRENGTH(N/mm²)

FLEXURAL STRENGTH(N/mm²)

7days 28days 7days 28days 7days 28days

1. 0% 17.88 28.66 2.11 3.67 2.89 3.84

2. 5% 20.80 31.60 2.65 3.63 4.90 5.07

3. 10% 21.67 33.20 3.10 3.95 5.23 6.00

4. 15% 23.67 35.50 2.85 3.82 5.75 6.38

5. 20% 17.35 25.00 2.65 2.98 4.04 5.09

COMPARSION OF ORDINARY AND PCB CONCRETE

Ordinary concrete specimen PCB concrete specimen

CONCLUSION• The addition of E-waste shows increase in compressive strength up to 15%

replacement. • Increase in split tensile strength is almost insignificant whereas gain in

flexural tensile strength have occurred even up to 15 % replacements. E-waste seems to have a more pronounced effect on the flexural strength than the split tensile strength.

• The use of E-waste in concrete is possible to improve its mechanical properties and can be one of the economical ways for their disposal in environment friendly manner.