Use of Wood Sawdust as Partial Replacement for Fine Aggregates in Making Soundproof Wall Tiles  / Cabreza, Joshua... [et al.].  -  April 2023  - 87 leaves :  28 cm. <br/><br/>Thesis <br/><br/> This study entitled Use of Wood Sawdust as Partial Replacement for Fine Aggregates in Making Soundproof Wall Tiles was designed for the purpose of producing new engineered-soundproofing-products using sawdust as raw materials. Its aim was to find out the level of effectiveness of the soundproof wall tiles using wood sawdust, also to lessen the waste of sawdust which is harmful to the environment by polluting the air and the land. The study was carried out by the civil engineering students and it was conducted at the University of Rizal System, Morong Campus during the school year 2022-2023.  The purpose of the study was to determine if wood sawdust might be used as partial replacement for fine aggregates in making wall tiles and to provide soundproofing material from wood waste with good characteristics, and reasonable cost. In order to complete the initial assessment, facts are gathered through the background of the study. The researchers tested its sound absorption properties. This wood sawdust was collected from a wood workshop, this research intends to develop alternative soundproofing materials.  The experimental type of research is a powerful tool for understanding cause-and-effect relationships. To begin with experimentation, the researchers started to collect wood sawdust in woodworking shop located in Batingan, Binangonan Rizal, the remaining necessary materials were prepared such as sand, cement and water. After preparing the materials, the researchers weigh the amount of cement, sand and sawdust with the mixing proportion based on ASTM Standard C270, where the percent replacement were 0%, 25%, 50% and 75%. After the curing it underwent series of tests in specifically in terms of water absorption, modulus of rupture, fire resistance and soundproofing properties.  Based on the results, physical properties of sand and sawdust in terms of its water absorption, sawdust is lower than the sand. Meanwhile, in its specific gravity sand has the greater amount than sawdust. Then the properties of sawdust in wall tiles found that percent replacement does not improve the water absorption. Therefore, its modulus of rupture decreases. The average intensity of sound of M1 is 52.00 dB, M2 is 53.33 dB, M3 is 51.67 dB, and M4 is 42.00 dB. P-values for water absorption, modulus of rupture, fire resistance and soundproofing were 0.001122, 0.142159, 0.160854 and 0.00001 calculated using One-way ANNOVA. The cost estimate shows that each piece of M1, M2, M3, and M4 costs 13.68 pesos, 12.91 pesos, 13.00 pesos, and 12.67 pesos, respectively.  The study concluded that, sawdust has a greater fineness modulus than sand, is lighter than sand, and absorbs less water. It shows that while sawdust is similar to sand in terms of absorbing water and fineness modulus, specific gravity produces a distinct outcome. Additionally, the water absorption increases along with replacement percent, while modulus of rupture decreases. The mixture with the most effective sound-absorbing is the one that contains the most sawdust. The P-value for water absorption and soundproofing is less than 0.05, therefore it was not significant. Meanwhile, it was allowed for soundproofing since the P-value was bigger than the alpha value. As a result, the researchers found that the mixture contains a considerable difference. The cost of wall tiles was relatively close but conventional is a little bit higher compare to sawdust wall tiles.  As for the recommendations, use hypochlorite treatment to lessen the water absorption of wood sawdust. It is suggested to lower the replacement to improve the water absorption and strength of tiles. To determine the actual sound intensity of wall tiles it suggested to conduct testing with sample tiles placed on a wall in a design room. Conduct different replacement of sawdust, proportions of cement water ratio to determine if it has an effect on water absorption, fire resistance and modulus of rupture. Include the estimated cost for each mixture of sawdust-based wall tiles installation and use ASTM Standard C270 in proportion for lower cost. Lastly, for the future researchers are encouraged to explore ideas into how to improve the appearance of sample wall tiles by adding a glazed coat.