Investigation the glazability of dimension andesites with glaze coating materials containing boron minerals in construction sector

Abstract

This study examined the usability of thin plates cut from rocks of volcanic origin as new decorative indoor and outdoor coating material when used instead of ceramic saddle. The study examined the basic material characterization of andesites and the glazability of andesites with glaze coating materials containing boron minerals. The series of characterization tests were conducted on andesite samples. Then, the samples were applied glaze for trial purposes. Analysis indicated that the andesite samples consisted of sanidine, mica and pyroxene minerals and its apparent porosity, density, water absorption, salt crystallization resistance, compressive strength, frost after compressive strength, bending strength and impact resistance values were 15.75 %, 2,640 kg/m3, 7.41 %, 1.06 %, 47.03 MPa, 45.25 MPa, 10.16 MPa and 9.87 kPa respectively. In heat microscope measurements, maximum sintering was recorded at 1,182 °C. Linear expansion coefficient (α) of the andesite at 400 °C was 4.69 × 10−6 K−1. Firing performed by using the prepared glaze recipe at approximately 1,055 and 1,000 °C produced good results in terms of body-glaze harmony.