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Crushing Equipment and Batch Plants

This gallery of equipment images is designed to help you identify some common types of equipment, past and present, for producing gravel, concrete and asphalt concrete.


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11 photo(s) Updated on: 03/14/2013
  • Asphalt Transfer Machine: Roadtec LTV1000. Asphalt concrete may start solidifying during delivery. This machine receives it from the truck, re-mixes it and places it in the paver’s receiving hopper.
  • Jaw crusher: c. 1984 Hewitt-Robins RockRam. The jaw crusher works by squeezing stone between the metal plates, one of which is moved back and forth like a lower jaw by a belt-driven cam.
  • Roll crusher: c. 1970 Austin-Western chain drive. The roll crusher further reduces stone crushed by a jaw or gyratory crusher by forcing it between two or three steel drums.
  • Cone crusher: 1976 El-Jay Twin 45 Rollercone. A cone crusher is the opposite of a gyratory: The outer cone gyrates against a fixed inner cone, crushing stone between them to produce sand and fines.
  • Crusher plant: c. 2000 Eagle Crusher 1200-25CC Ultramax. Crushers and screens can be combined in numerous ways on a single carrier for portability. This unit combines an impact crusher and deck screen
  • Trommel or rotary screen: Sand and gravel has to be sorted by size before it can be used in construction. A rotary screen does so in a rotating cylinder lined with steel mesh of varying openings.
  • Deck screen: Since the 1930s, most sand and gravel screening has been done by vibratory deck screens. The material passes across or through one to four decks with mesh of varying openings.
  • Concrete mixer: Often called cement mixers, although cement is only an ingredient of concrete, concrete mixers range from small portable units like this to massive 8-cubic-yard-capacity drums.
  • Batch plant: Erie Strayer Twin T. The hoppers store the dry materials from which concrete is made, which are measured through batchers into trucks. Plants like this have been used since the 1920s.
  • Central Mix Plant: Erie Strayer MG12CP2. Batch plants can be equipped with large mixers for high-production work such as highway paving. Transit mixers and dump trucks haul the concrete to the pour.
  • Asphalt plant: Standard Steel RM. Asphalt concrete is produced by combining aggregates and asphalt, usually under extreme heat. Finished product is loaded into dump trucks under the tower.
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