Reservoir Mud Lightweight Aggregate
Data from the Water Resources Agency indicates that each year, Shihmen Reservoir generates several million cubic meters of mud accumulation that decreases the reservoir’s capabilities. This material is an artificial lightweight aggregate (clay aggregate) that utilizes Shihmen Reservoir’s mud which contains clay, shale, slate, perlite, coal gangue, and fly ash; after processing into pellets or grinded into powder to form balls, they’re placed in a rotary kiln and fired at 1,100 – 1,200℃ so they quickly expand and form a solid brown shell, or porous silicate ceramic pellets with a bulk density less than 1,200/kgm3. They can be applied in various such as: (1) As lightweight concrete, it features characteristics such as high strength-to-weight ratio, thermal insulation, good heat retention, good shock resistance, good fire resistance, good durability, structural efficiency, and significant economic benefits. (2) When applied in horticultural landscapes, they feature properties such as high porosity, good water retention, and excellent decorative properties. They can be mixed with soil and have a pH value that is neutral or weak alkaline to achieve excellent water drainage and absorption which is beneficial to the development of plant roots. (3) They’re excellent for water purification and sewage treatment as the large surface area of this material allows for exceptional absorption and filtration that can effectively remove suspended particles, hydrocarbons, nitrogen, and phosphorous within water. (4) When used for the greenification of rooftops, it can reduce the load-bearing of a roof as the unit weight is half of sand and gravel.
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