초록 ▼

This invention describes apparatus and method for recycling undelivered cement left as residue in cement trucks. Undelivered cement at the end of the working day is deposited on a shaker screen under action of high pressure water jets which trap large aggregate and force the large aggregate onto a f

This invention describes apparatus and method for recycling undelivered cement left as residue in cement trucks. Undelivered cement at the end of the working day is deposited on a shaker screen under action of high pressure water jets which trap large aggregate and force the large aggregate onto a first belt for collection. Sand, cement and water fall through the first screen onto a second screen which traps sand under action of high pressure jets that force the sand onto a second belt for delivery to a collection area. The remaining cement, water and slurry is collected in a trough and pumped to a settling tank having an auger that periodically mixes the water and cement to prevent hardening. A skimmer located at the uppermost portion of the settling tank collects clear water used to clean the aggregate and cement previously mentioned. The cement, water and slurry collected in the settling tank is used in combination with fresh sand and cement to provide a fresh charge to waiting cement trucks. Sand, cement, water and aggregate previously lost is now recycled and reused rather than being wasted.

대표청구항 ▼

A continuously operating portable and mobile cement recycling apparatus comprising: a shaker and high pressure water jet system for washing and collecting residue cement, water, sand and rock from cement trucks and separating said rock from said sand, a pair of movable belts one over the other for i

A continuously operating portable and mobile cement recycling apparatus comprising: a shaker and high pressure water jet system for washing and collecting residue cement, water, sand and rock from cement trucks and separating said rock from said sand, a pair of movable belts one over the other for independently collecting and moving said rock and sand to different storage areas, a holding tank below said shaker and said movable belts and having an area in the bottommost portion for collecting cement slurry consisting of cement and water, an auger located in the bottommost portion of said tank for periodically moving said slurry and providing continuous operation of said holding tank, a settling tank communicating with said holding tank for receiving said slurry and having a sump area in the bottommost portion for settling said slurry and providing continuous operation of said settling tank, an auger located in said settling tank for periodically moving said slurry, a skimmer located in the uppermost portion of the settling tank for receiving liquid substantially free of cement and feeding said liquid to said high pressure jet system, and a pump for feeding said slurry located within the sump area of said settling tank to a loading area for supplying a charge of cement slurry to waiting cement trucks.