02367nam a22002417a 4500 OSt 20261110105809.0 261110s2026 |||||||| |||| 00| 0 eng d T ENG D45 2026 Del Rosario, Jenhaira Czarina N. Experimental study on the use of pulverized quail eggshells as a supplementary cementitious material / Jenhaira Czarina N. Del Rosario, Ryan Mikel J. Magtibay, and Verniece Jilianne L. Sanchez. EAC Cavite : School of Engineering, 2026. xii, 112 pages ; 28 cm. rdacontent text rdamedia unmediated rdacarrier volume Experimental research Includes bibliographical references This study evaluated pulverized quail eggshells (QES) as a supplementary cementitious material in hydraulic cement mortar. The research characterized the physical and chemical properties of QES and assessed its cementitious potential alongside its effect on mortar compressive strength at 5% and 10% cement replacement by weight. Quail eggshells were washed, dried, pulverized, passed through a No. 200 sieve, and analyzed via Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS). Mortar specimens were tested for compressive strength at 7 and 28 days following ASTM C109, and the Strength Activity Index (SAI) was evaluated according to ASTM C311. Results indicated that QES had a density/specific gravity of 0.947 g/mL and consisted mainly of calcium carbonate, with calcium, carbon, and oxygen comprising 89.19% of its elemental composition. At 5% replacement, the 7-day and 28-day average compressive strengths reached 12.07 MPa and 18.10 MPa, respectively, performing comparably to and slightly exceeding the control mix. Conversely, the 10% replacement level significantly reduced compressive strength. The 5% replacement achieved an SAI of 99.75% at 7 days and 104.02% at 28 days, surpassing the 75% minimum standard requirement. One-way ANOVA revealed significant differences among mixtures across both curing ages. In conclusion, QES serves as an effective supplementary cementitious material at an optimal 5% replacement. author Magtibay, Ryan Mikel J. author Sanchez, Verniece Jilianne L. lcc TH EAC Cavite-Thesis 0 100685 100685 0 0 lcc 0 0 CAVITE CAVITE EAC Cavite-Thesis 2026-11-10 0 T ENG D45 2026 ML-TH2840 2026-11-10 10:58:22 2026-11-10 TH