Acoustical properties of compressed earth blocks: Effect of compaction pressure, water hyacinth ash and lime
This study assessed the potential use of a mixture of lime and water hyacinth ash (WHA) as binders in fabrication of cylindrical compressed earth blocks (CEBs) with good acoustic absorption properties for building and construction. Different concentrations of the binders and compaction pressures wer...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523000074 |
| _version_ | 1797799000643993600 |
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| author | Justus Ouma Nicholas Ongwen Erick Ogam Mercy Auma Z.E.A. Fellah Maxwell Mageto Mohamed Ben Mansour Andrew Oduor |
| author_facet | Justus Ouma Nicholas Ongwen Erick Ogam Mercy Auma Z.E.A. Fellah Maxwell Mageto Mohamed Ben Mansour Andrew Oduor |
| author_sort | Justus Ouma |
| collection | DOAJ |
| description | This study assessed the potential use of a mixture of lime and water hyacinth ash (WHA) as binders in fabrication of cylindrical compressed earth blocks (CEBs) with good acoustic absorption properties for building and construction. Different concentrations of the binders and compaction pressures were employed so as to vary the acoustical properties of the fabricated blocks. The geometric and transport parameters of their porous microstructure were recovered through probing using acoustic waves. A low-frequency acoustic wave guide was built for this purpose. It was found out that the transmission coefficient decreased with the compaction pressure, and with addition of lime, while WHA increased the transmission coefficient. The non-acoustical parameters recovered using the equivalent fluid model (JCAL) showed that the variation of the geometry of the microstructure of the blocks is what influences the acoustic transmission coefficient. Thus, the properties of the CEBs can be steered using binder concentration and compaction pressure in a controlled manner. |
| first_indexed | 2024-03-13T04:12:22Z |
| format | Article |
| id | doaj.art-4062a78f71f94203b741234f1070261f |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:12:22Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-4062a78f71f94203b741234f1070261f2023-06-21T06:53:24ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e01828Acoustical properties of compressed earth blocks: Effect of compaction pressure, water hyacinth ash and limeJustus Ouma0Nicholas Ongwen1Erick Ogam2Mercy Auma3Z.E.A. Fellah4Maxwell Mageto5Mohamed Ben Mansour6Andrew Oduor7Maseno University, P.O. Box Private Bag, Maseno, 40137, KenyaMaseno University, P.O. Box Private Bag, Maseno, 40137, Kenya; Tom Mboya University College, P.O. Box 199, Homa-Bay, 40300, Kenya; Corresponding author at: Maseno University, P.O. Box Private Bag, Maseno, 40137, Kenya.Laboratoire de Mécanique et d′Acoustique, LMA-UMR 7031 Aix-Marseille University-CNRS-Centrale Marseille, F-13453 Marseille CEDEX 13, FranceMaseno University, P.O. Box Private Bag, Maseno, 40137, KenyaLaboratoire de Mécanique et d′Acoustique, LMA-UMR 7031 Aix-Marseille University-CNRS-Centrale Marseille, F-13453 Marseille CEDEX 13, FranceMasinde Muliro University of Science and Technology, P.O. Box 190, Kakamega 50100, KenyaLaboratoire d′Énergétique et des Transferts Thermique et Massique, Faculté des Sciences de Bizerte, Université de Carthage, TunisiaMaseno University, P.O. Box Private Bag, Maseno, 40137, KenyaThis study assessed the potential use of a mixture of lime and water hyacinth ash (WHA) as binders in fabrication of cylindrical compressed earth blocks (CEBs) with good acoustic absorption properties for building and construction. Different concentrations of the binders and compaction pressures were employed so as to vary the acoustical properties of the fabricated blocks. The geometric and transport parameters of their porous microstructure were recovered through probing using acoustic waves. A low-frequency acoustic wave guide was built for this purpose. It was found out that the transmission coefficient decreased with the compaction pressure, and with addition of lime, while WHA increased the transmission coefficient. The non-acoustical parameters recovered using the equivalent fluid model (JCAL) showed that the variation of the geometry of the microstructure of the blocks is what influences the acoustic transmission coefficient. Thus, the properties of the CEBs can be steered using binder concentration and compaction pressure in a controlled manner.http://www.sciencedirect.com/science/article/pii/S2214509523000074Compressed earth blocksAcoustics of compressed earth blocksWater hyacinth in compressed earth blocksLime-stabilized earth blocks |
| spellingShingle | Justus Ouma Nicholas Ongwen Erick Ogam Mercy Auma Z.E.A. Fellah Maxwell Mageto Mohamed Ben Mansour Andrew Oduor Acoustical properties of compressed earth blocks: Effect of compaction pressure, water hyacinth ash and lime Case Studies in Construction Materials Compressed earth blocks Acoustics of compressed earth blocks Water hyacinth in compressed earth blocks Lime-stabilized earth blocks |
| title | Acoustical properties of compressed earth blocks: Effect of compaction pressure, water hyacinth ash and lime |
| title_full | Acoustical properties of compressed earth blocks: Effect of compaction pressure, water hyacinth ash and lime |
| title_fullStr | Acoustical properties of compressed earth blocks: Effect of compaction pressure, water hyacinth ash and lime |
| title_full_unstemmed | Acoustical properties of compressed earth blocks: Effect of compaction pressure, water hyacinth ash and lime |
| title_short | Acoustical properties of compressed earth blocks: Effect of compaction pressure, water hyacinth ash and lime |
| title_sort | acoustical properties of compressed earth blocks effect of compaction pressure water hyacinth ash and lime |
| topic | Compressed earth blocks Acoustics of compressed earth blocks Water hyacinth in compressed earth blocks Lime-stabilized earth blocks |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523000074 |
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