Acoustical Properties of Oil Palm Shell Concrete for Noise Barrier Materials
Also available in printed version
| Auteur principal: | |
|---|---|
| Autres auteurs: | |
| Format: | Doctoral thesis |
| Langue: | anglais |
| Publié: |
Universiti Teknologi Malaysia
2025
|
| Sujets: | |
| Accès en ligne: | https://utmik.utm.my/handle/123456789/39892 |
| Abstract | Abstract here |
| _version_ | 1854975093905555456 |
|---|---|
| author | Zanariah Jahya |
| author2 | Khairulzan Yahya, supervisor |
| author_facet | Khairulzan Yahya, supervisor Zanariah Jahya |
| author_sort | Zanariah Jahya |
| description | Also available in printed version |
| format | Doctoral thesis |
| id | utm-123456789-39892 |
| institution | Universiti Teknologi Malaysia |
| language | English |
| publishDate | 2025 |
| publisher | Universiti Teknologi Malaysia |
| record_format | dspace |
| record_pdf | Abstract |
| spelling | utm-123456789-398922025-08-21T07:34:09Z Acoustical Properties of Oil Palm Shell Concrete for Noise Barrier Materials Zanariah Jahya Khairulzan Yahya, supervisor Civil Engineering Also available in printed version Conventional concrete tends to reflect noise, resulting in reverberation, making it unfit for use in public halls, acoustical rooms, and large classrooms. Porous concrete, conversely, has potential as a sound-absorbing material due to its high porosity properties. Nevertheless, a material with a high porosity loses density and strength. Previous research discovered that the aggregate type, additives, and concrete production technology influenced the void ratio in concrete. The oil palm industry in Malaysia produces a substantial quantity of oil palm shell (OPS) byproducts. In its natural state, OPS has considerable internal porosity, making it a potential aggregate replacement in the mix design for porous concrete. This study evaluated the feasibility of using OPS as a noise barrier material in porous concrete and mortar. As an aggregate replacement, OPS ranging in size from 1.18 mm to 4.75 mm was used in mortar, while OPS ranging from 5 mm to 10 mm was used in porous concrete. Conventional mortar (M0) with a cement-to-aggregate ratio of 1:3 served as the control sample. The OPS mortar samples contained one part (OPSM1), two parts (OPSM2), and three parts (OPSM3) of OPS. For the control porous concrete (PC0), a 1:4 (cement to coarse aggregate) mix design was employed. Samples of porous concrete were produced using OPS mixes with four various proportions: OPSPC1 (one part OPS), OPSPC2 (two parts OPS), OPSPC3 (three parts OPS), and OPSPC4 (four parts OPS). In addition, mortar and concrete samples of various thicknesses (50 mm, 100 mm, and 150 mm) were analysed to evaluate their acoustical and non-acoustical properties: sound absorption coefficient (a), transmission loss (TL), and noise reduction coefficient (NRC). Compressive strength, porosity and density tests were performed on the samples to determine their non-acoustic properties. Scanning Electron Microscopy (SEM) analysed hardened mortar and porous concrete morphology. The relationship between acoustical and non-acoustical properties was investigated using regression modelling. OPSM1 and OPSM2 were the ideal mixes, as their compressive strength (exceeding 7 Mpa) and a value (TL exceeding 25 dB) met the requirements as noise barrier materials. In contrast, the ideal mix for porous concrete was OPSPC1 with a compressive strength of 4.2 Mpa and a greater than 0.4. 50 mm-thick OPSM2 and 50 mm-thick OPSPC1 were discovered to be the optimal combination. Combining OPS mortar as the hard backing layer and porous concrete as the absorptive layer demonstrated superior noise reduction performance compared to the conventional concrete noise barrier. akmal-alif UTM 189 p. Thesis (Doctor of Philosophy (Civil Engineering)) - Universiti Teknologi Malaysia, 2023 2025-03-05T05:39:11Z 2025-03-05T05:39:11Z 2023 Doctoral thesis https://utmik.utm.my/handle/123456789/39892 vital:156476 valet-20240319-14472 ENG Closed Access UTM Complete Unpublished Completion application/pdf Universiti Teknologi Malaysia |
| spellingShingle | Civil Engineering Zanariah Jahya Acoustical Properties of Oil Palm Shell Concrete for Noise Barrier Materials |
| thesis_level | PhD |
| title | Acoustical Properties of Oil Palm Shell Concrete for Noise Barrier Materials |
| title_full | Acoustical Properties of Oil Palm Shell Concrete for Noise Barrier Materials |
| title_fullStr | Acoustical Properties of Oil Palm Shell Concrete for Noise Barrier Materials |
| title_full_unstemmed | Acoustical Properties of Oil Palm Shell Concrete for Noise Barrier Materials |
| title_short | Acoustical Properties of Oil Palm Shell Concrete for Noise Barrier Materials |
| title_sort | acoustical properties of oil palm shell concrete for noise barrier materials |
| topic | Civil Engineering |
| url | https://utmik.utm.my/handle/123456789/39892 |
| work_keys_str_mv | AT zanariahjahya acousticalpropertiesofoilpalmshellconcretefornoisebarriermaterials |