Investigation of concrete hollow blocks with powdered green mussel shell as partial cement replacement and pig hair as fiber reinforcement

• Main Authors: Capati, Anna Mikaella G., Domingo, Eriko Ross B., Indefenzo, Alyssa Audrey C., Jao, Joey Timothy C.
• Format: text
• Language: English
• Published: Animo Repository 2017
• Subjects: Cement; Building materials; Civil Engineering; Structural Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/5784
• Institution: De La Salle University

The effects of green mussel shells (GMS) and pig hair fiber (PHF) on the compressive strength of non-load bearing concrete hollow blocks (CHB) and the material unit cost of production are presented in this research. Cement is partially replaced with (0%, 5%, 10% and 15% by volume of cement) powdered GMS, while PHF is used as an additive (0%, 0.4%, 0.8% and 1.2% by volume of mix). Two water contents (17.48% and 13.91% of the total volume of the mix for case A and B, respectively) are used in the study to observe if the amount of water in the mix affects the strength of the CHB. Compressive strength tests were performed at the age of 28 days. The strength tests were performed at the age of 28 days. The strength development of the strongest and weakest mix from each case is determined considering the 7th, 14th, and 21st day after production. The results show that the strength of the CHB increases as the curing prolongs. After determining the compressive strengths of the CHB mixes, a trend was observed regarding the use of PHF as an additive to the CHB. It shows that increasing the amountn of PHF added to the mix would result to a decrease in compresive strength. On the other hand, GMS increases the strength of CHB at 5% replacement of cement, but exceeding this percentage results to a decrease in strength. It was also observed that the material cost of CHB with GMS replacement and PHF addition is lesser compared to the material cost of a conventional CHB since the amount of cement is reduced and replaced with waste materials. The most economical out of all the cases is case B0G5P0 with 5% GMS cement replacement it has a 7.6% decrease in material cost and 6.5% increase in compressive strength compared to the control case.