Shinta Marito Siregar, Syahrul Humaidi, Nurdin Bukit, Erna Frida
XRF characterization results showed that coal boiler ash contained SiO2 = 29.3%; Al2O3= 14%; Fe2O3= 30.9%; CaO= 18.3% and palm shell boiler ash containing SiO2 = 48.9%; Fe2O3= 3.42%; CaO= 13.8%. The FTIR test results show that the OH stretching vibration of the SiOH group absorbs in the regions 3676, 3597, 3462, and 3315 cm-1 at the peak of the coal boiler ash spectrum and 3614, 3502, 3365, and 3323 cm-1 at the peak of the palm shell boiler ash spectrum. From the ECC mortar FTIR test results, it can be seen that the functional group changes with the OH stretching vibration of the SiOH group absorbing in the 3387 cm-1 area. The results of the ECC mortar compressive strength test at 28 days increased with the addition of coal boiler ash up to 15% and palm shell boiler ash 10%, so the compressive strength was 59.30 MPa. © 2023 Trans Tech Publications Ltd, Switzerland
Doctoral Program Departement of Physics, Universitas Sumatera Utara, Medan, 20155, Indonesia; Universitas Muslim Nusantara Al Washliyah, Jl. Garu II A No. 93, Medan, Indonesia; Departement of Physics, Universitas Sumatera Utara, Medan, 20155, Indonesia; Physics, Universitas Negeri Medan, Jl. Willem Iskandar Pasar V, Medan, 20221, Indonesia
