White Portland Cement is produced by high quality limestone that contains low Fe2O3 and less coloring elements and by carefully selected heating sources.
Also, through the special processes such as calcination at 1,450C that is higher temperature than Ordinary Portland Cement’s and water quenching, it achieves pure white cement by minimizing coloring elements (Fe2O3).
White Portland Cement performs over 90 bright-white degree by Hunter colorimeter, which enables outstanding whiteness and various coloring with pigments.
By this characteristic, it can be applied to various interior and exterior materials such as tile adhesive mortar, terrazzo, inter-locking blocks, exposed concrete and artificial stone etc. for high-classed design.
The main composition of Ordinary Portland Cement is 3CaO·SiO2, 2CaO·SiO2, 3CaO·Al2O3, 4CaO·Al2O3·Fe2O3 and CaSO4·2H2O as main mineral phases. When it meets water, it forms hydrated minerals and characterizes strength improvement. Whereas, White Portland Cement by Union corp. enhances its strength since it contains thrice 3CaO·SiO2 than OPL does. Moreover it’s also suitable for works like interior & exterior or exposed concrete by its high long-age strength feature.
Union corp., the only producer of White Portland Cement in Korea, operate our own limestone mines where the low Fe2O3 and high quality raw materials can be easily found. Since 1964, we have been leading the industry by supplying White Portland Cement as well as various customized applications with continuous R&D.WHITE PORTLAND CEMENT 연구소 이미지