Physical And Mechanical Properties Of Cement-Based Skim Coat Utilizing Limestone From Northern Mindanao, Philippines As Filler Material

Cement-based skim coat is a vital material for residential and commercial wall and ceiling applications. Its growing demand can be attributed to the increasing preference for energy-efficient and sustainable construction practices, which prioritize environmentally friendly materials such as paints and coatings. A key ingredient in skim coat production is limestone, commonly used as a filler material. To enhance productivity and cost-effectiveness, efforts have been made to identify locally available sources of limestone. This study investigates the potential of limestone from Northern Mindanao as a filler material in cement-based skim coat production. The limestone was analyzed, and skim coat samples were produced at varying limestone-to-cement ratios, particle sizes, and water demands. The study evaluated the effects of these factors on the ease of mixing, workability, setting time, trimming, adhesion, and compressive strength of the skim coat. Results revealed that the limestone from Northern Mindanao, with a calcium carbonate (CaCO3) content of 93.3%, is a suitable filler material, as evidenced by the physical properties of the skim coat. Additionally, the samples met the standard specification of compressive strength for skim coat materials. These findings highlight the significant potential of Northern Mindanao limestone in cement-based skim coat production.