Recycled-Waste-to-Cement System Using Waste and By-products

We recycle waste and by-products into resources for cement. This helps to extend the lifetime of landfills, prevent the depletion of natural mineral resources, control the emission of greenhouse gasses, and reduce air pollution.
In fiscal 2009(year ended March 31, 2010), we recycled 387.5 kg of waste and by-products per ton of cement manufactured. Both the total volume and the rate of consumption fell from fiscal 2008 due to a decline in industrial activity.
Waste and By-products Consumption in Cement Plants (FY3/2010)
Waste and By-products Total Consumption (t) Rate of Consumption
(kg / t-cement)
Industrial Coal Ash (including JIS fly ash) 1,902,259 116.5
Blastfurnace Slag 1,114,135 68.2
Construction Soil 562.440 34.4
Byproduction Gypsum 558,323 34.2
Dirt and Sludge 455,175 27.9
Wood Chips 81,016 5.0
Waste Plastic 84,582 5.2
Other 1,41,227 69.9
Subtotal 5,899,157 361.3
Household Water Treatment Plant Sewage Sludge and Ash 322,840 20.4
Municipal Incinerator Ash 75,537 4.6
Other Municipal Waste 19,860 1.2
Subtotal 428,237 26.2
Total Waste   6,327,394 387.5
Raw Material-Related 5,919,978 362.5
Fuel-Related 407,416 25.0