Thesis Open Access

Usage of Garment Sewage Sludge as a Partial Replacement of Sand for a Concrete

Elleni Eliyas

Thesis supervisor(s)

Tesfaye Alemu ( PhD )

Recent construction boom in Ethiopia has leads to extra concrete
demands. However, this resulted in scarce of concrete constituent
materials like sand. Nevertheless, sludge which is abundant and a byeproduct of garment/textile factories in Industry zones here in our country
Ethiopia has a potential for use to replace sand in non-structural concrete
The present research work experimentally investigates use of garment
/textile sludge as partial replacement of sand in concrete production.
Experimental program was designed for C-25 concrete with various
proportions of sludge replacement with sand and fresh concrete test,
hardened concrete density and mechanical property tests were performed
to quantify performance gains.
Experimental results showed as compared to control concrete, 5%
garment/textile sludge replacement by sand resulted on the 28th -day
compressive strength is almost same concrete compressive strength.
Whereas cost benefit analysis revealed a saving of 14.77 birr/m3. Also, 7th
-day compressive strength test results indicated a 5.4% gain as compared
to control specimen which is good characteristics for use of sludge
modified concrete in precast concrete production. Hence, the research
recommends this C-25 grade of solid concrete for non-structural concrete.

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