Strength and Microstructure of Coffee Silverskin Blended Mortar

This study pertains to incorporation of coffee silverskin (CSS) in partial replacement for ordinary Portland cement (OPC) mortar, by investigating its fresh properties (setting and workability), compressive strength (3, 7, 14 28-day), absorption microstructural characteristics. The objectives were reduce environmental solid wastes achieve cost efficiency the use construction materials. CSS was expressed as a ratio total binder (CSS/(OPC + CSS)) varied from 0 5%. findings revealed that could workability, setting time early strength. It also enhance CSS-blended mortar (CBM). cause reduction workability due contribution viscosity mixture emulsification fat component (acetate) aromatic compounds, observed Fourier Transform Infrared (FTIR) spectroscopy X-ray diffraction techniques. presence these compounds caused disintegration resulted lower In addition, other organic compound but absent OPC enhanced porosity CBM. 28-day 25 MPa be achieved if CSS/(CSS OPC) ratios kept below 3%. maximum 38.5 obtained with optimum content 1 wt%. relative density (water) 0.345; therefore, it used produce lightweight concrete. promotes valorization raw waste material which subgrade road pavement.