Nzambi Matee, founder of Gjenge Makers, a social enterprise that recycles and up-cycles waste plastic into construction products.(REUTERS)
Nzambi Matee, founder of Gjenge Makers, a social enterprise that recycles and up-cycles waste plastic into construction products.(REUTERS)

Woman in Kenya recycles plastic waste into bricks stronger than concrete

Nzambi Matee's factory produces 1,500 bricks each day, made from a mix of different kinds of plastic.
Reuters
PUBLISHED ON FEB 03, 2021 04:14 PM IST

Nzambi Matee hurls a brick hard against a school footpath constructed from bricks made of recycled plastic that her factory turns out in the Kenyan capital.

It makes a loud bang, but does not crack.

"Our product is almost five to seven times stronger than concrete," said Matee, the founder of Nairobi-based Gjenge Makers, which transforms plastic waste into durable building materials.

Nzambi Matee, founder of Gjenge Makers, a social enterprise that recycles and up-cycles waste plastic into bricks.(REUTERS)
Nzambi Matee, founder of Gjenge Makers, a social enterprise that recycles and up-cycles waste plastic into bricks.(REUTERS)

"There is that waste they cannot process anymore; they cannot recycle. That is what we get," Matee said, strolling past sacks of plastic waste.

Matee gets the waste from packaging factories for free, although she pays for the plastic she gets from other recyclers.

Her factory produces 1,500 bricks each day, made from a mix of different kinds of plastic.

These are high density polyethylene, used in milk and shampoo bottles; low density polyethylene, often used for bags for cereals or sandwiches; and polypropylene, used for ropes, flip-top lids and buckets.

But she does not work with polyethylene terephthalate or PET, commonly used for plastic bottles.

Nzambi Matee, founder of Gjenge Makers.(REUTERS)
Nzambi Matee, founder of Gjenge Makers.(REUTERS)

The plastic waste is mixed with sand, heated and then compressed into bricks, which are sold at varying prices, depending on thickness and colour. Their common grey bricks cost 850 Kenyan shillings ($7.70) per square metre, for example.

Matee, a materials engineer who designed her own machines, said her factory has recycled 20 tonnes of waste plastic since its founding in 2017.

Nzambi Matee, founder of Gjenge Makers, a social enterprise that recycles and up-cycles waste plastic into construction products.(REUTERS)
Nzambi Matee, founder of Gjenge Makers, a social enterprise that recycles and up-cycles waste plastic into construction products.(REUTERS)

She plans to add another, bigger, production line that could triple capacity, and hopes to break even by year end.

Matee set up her factory after she ran out of patience waiting for the government to solve the problem of plastic pollution.

"I was tired of being on the sidelines," she said.

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