Evaluation of Pavement Brick Fabricated using Sta. Cruz Clay, Rice Husk Ash, and Capiz Shell
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Abstract
This study explored the production of pavement bricks using Sta. Cruz clay, rice husk ash, and Capiz shell as additives. Sta. Cruz clay served as the base material, while rice husk ash provided alternative silica, and Capiz shell as a fluxing agent for strength enhancement and waste minimization. Through oxide percentage analysis via EDXRF, a formulation with 80% Sta. Cruz Clay, 15% Rice Husk Ash, and 5% Capiz Shell was identified as optimal, exhibiting no visible cracks post-firing. The optimized product underwent testing for water absorption, volumetric shrinkage, and weight loss, yielding values of 33.1%, 1.02%, and 42.5%, respectively. Consumer surveys indicated high acceptability with an average rating of 2.68, affirming its applicability and design suitability.