Porous landscape pebble and method of manufacturing the same

摘要

Fly ash containing unburned carbon of at least 10 wt% is pelletized using water as a binder without substantial addition of an inorganic binder, into unsintered particles each having an average diameter of 2 mm to 30 mm. The unsintered pelletized particles are sintered at a temperature which allows the landscape pebble to have a compression strength of at least 50 N and a water absorption rate of at least 40 wt%.