Utilization of Perna Viridis as a partial substitute to cement in concrete mix

• Main Authors: Ngo, Kriss Daniels S., Sarao,, Ernesto F., III, Talagtag, Rogel Exequiel E.
• Format: text
• Language: English
• Published: Animo Repository 2014
• Subjects: Perna viridis; Freshwater mussels; Concrete > Additives; Civil Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/11254
• Institution: De La Salle University

Perna Viridis (Tahong) shells are non-biodegradable and thus considered waste products. This study was conducted as a means to recycle these shells while finding an alternative source of constitution material in the process. The study uses Perna Viridis Shells as partial replacement to cement in concrete. Replacement is done in 3 intervals: 5%, 10%, and 15%. Water cement ratios were also varied at 0.3, 0.4, and 0.5. Mechanical properties such as Compressive and Splitting Tensile strength were tested. Workability and cost were also studied. A comparison of the data shows that at a certain combination of water cement ratio and percentage replacement (0.4 water cement ratio and 10% replacement), the strength of concrete is enhanced by 48% (from 21.32MPa to 31.62Pa) however the overall workability decreases in the process but is still within workable range (from 110mm to 85mm). The study shows that cement replacement with these shells are viable, however, only yields positive results on certain combination of water-cement rations and percentage replacements.