Thesis Open Access

Study on Behavior of interlocking compressed Earth block Using Municipal Solid Waste Incinerated Bottom Ash

Tefera Getie

Thesis supervisor(s)

Belachew Asteray ( PhD)

Interlocking compressed earth blocks were the modern form of earth block production
for the construction of houses. In developing countries using earth as a construction
material was an economical, sustainable, environmental friend and most efficient
means to build houses. Much effort had not been done to utilize municipal solid waste
incinerated bottom ash for the production of interlocking compressed earth blocks since
a high amount of bottom ash was discharged from the incineration plant per day. The
use of this municipal solid waste incinerated bottom ash in construction mitigates the
environmental dangers associated with ash disposal in landfills and reduces the
requirement of cement. This research was conducted on interlocking compressed earth
blocks using municipal solid waste incineration bottom ash related to mechanical
properties and production cost. The mechanical properties of interlocking compressed
earth blocks and materials laboratory experimenters were done with different mix
proportions in the ratio of 2 %, 4%, 6% and 8% municipal solid waste incinerated
bottom ash with 8%,6%,4% and 2% cement and also 10%,15%and 20% municipal solid
waste incinerated bottom ash without cement in the weight of mix soil. From this up to
6% municipal solid waste incinerated bottom ash with 4%cement mix gave better result
on the compressive strength and water absorption capacity, which exceeds the
minimum standard requirement. The addition of municipal solid waste incinerated
bottom ash above 6 percent gave high water absorption capacity and low compressive
strength, which reduce the long-term durability of the blocks. Interlocking compressed
earth blocks without municipal solid waste incinerated bottom ash had a little higher
compressive strength and low water absorption capacity. However, using municipal
solid waste incinerated bottom ash for the production of compressed earth blocks
reduces, the production cost and environmental pollution without compromising
minimum standard requirement. The production cost of interlocking compressed earth
blocks was minimized up to 33 percent (3 birrs) per block by using 6%MSWI bottom
ash with 4% cement. Therefore, stabilizing with bottom ash and cement was a more
economical and environmentally friendly method.

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