Technology for making lime-sand brick cured by steam

A technology for producing the steam-cured lime-sand bricks uses the volcanic ash material or granular slags of blast furnace (8-15 wt. portions), calcium lime (6-10) and sand (75-85) as raw materials, and includes such steps as ball grinding the volcanic ash material or granular slags and calcium lime, mixing with sand and water, and steam curing at 80-100 deg.c and with relative humidity greater than 95% for 8-24 hr. Its advantages are low cost, saving energy and environmental protection.