The Philippines-based cement company, Taiheiyo Cement Philippines Inc. (TCPI), has the options to use volcanic ash or fly ash as additives in their cement – both of which are aimed at environmental conservation and lower production costs.
Environmental and safety manager for TCPI, Nilo Yap, stated that – for the time being – the company prefers natural additives for its cement given the option of procuring ash from nearby cities. The additive, called tuff, is made from volcanic rock that has hardened or compacted. TCPI has considered the use of coal ash instead of its volcanic cousin, but for the time being decided in favor of volcanic ash. The company expressed more concern for the chemical composition of the coal ash, especially in regards to potential leaks while the ash is being transported to the cement plants. Yap said, “Handling pozzolan or volcanic ash is easier than handling coal ash because of its chemical composition. We do not like its [coal ash] effect on our water supply. There will be more problems with coal ash.”
TCPI has stated that its new cement mix is comparable to traditional Portland Cement. “Using tuff, you will attain the same and even higher strength cement. It also prevents thermal stress,” said Yap. This product is intended for use in the construction of high rise buildings, water pipes, hollow block filling, and sewer systems. It is a viable, green option in areas with high volcanic ash concentrations.