Thesis Open Access

Use of Municipal Solid Waste Incinerator Bottom Ash with Stone Dust as Partial Replacement of Fine Aggregate in Concrete

Sewnet Dereje


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    <subfield code="a">Tesfaye Alemu ( PhD )</subfield>
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    <subfield code="a">&lt;p&gt;Concrete demand is increasing with time. So do demand of its constituent materials like&lt;br&gt;
sand and cement is rising. Thus, there is always a need to look for alternative materials&lt;br&gt;
to replace depletion of virgin input construction materials. This research work studies&lt;br&gt;
use of municipal solid waste incinerator (MSWI) bottom ash with stone dust as partial&lt;br&gt;
replacement of fine aggregate in concrete production. The solid waste incinerator&lt;br&gt;
(MSWI) bottom ash comes from Addis Ababa Repi Waste to Energy Power Plant. This&lt;br&gt;
plant is a leading national project commenced to prompt energy generation by recycling&lt;br&gt;
city wastes.&lt;br&gt;
Experimental program was designed for C25 concrete with various proportions of&lt;br&gt;
municipal solid waste incinerator (MSWI) bottom ash with stone dust to sand. Fresh&lt;br&gt;
and hardened concrete mechanical property tests were executed to investigate&lt;br&gt;
performance gains of municipal solid waste incinerator (MSWI) bottom ash modified&lt;br&gt;
concrete.&lt;br&gt;
The results of the slump test of the mixes have shown that, as the amount of the MSWI&lt;br&gt;
bottom ash with stone dust in the mixes increased, workability decreased. From the&lt;br&gt;
recorded results, the hardened concrete strengths at 7 and 28 days of curing was&lt;br&gt;
improved up to 50% replacement. Whereas, at 40% replacement, peak 20.13%, 19.82%&lt;br&gt;
and 7.66% gain in compressive, flexural and shear strength was observed respectively.&lt;br&gt;
In addition, as level of replacement increased unit weight of the hard concrete&lt;br&gt;
decreased.&lt;/p&gt;</subfield>
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    <subfield code="c">2020-07-30</subfield>
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    <subfield code="a">Bottom ash, sand, partial replacement, concrete, compressive strength, flexural strength and shear strength</subfield>
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