More stories about Shotcrete

  • Hiring a Good Shotcrete Nozzleman

    We always have a difficult time hiring good shotcrete nozzlemen. When interviewing nozzlemen, how can we screen those who can shoot well from those who can only talk about shooting?

  • The Wide World of Shotcrete

    Simply said, shotcrete is sprayed concrete or mortar. There are two different types of shotcrete: wet mix and dry mix. With dry mix, the dry ingredients are mixed and blown in a stream of compressed air through the hose to the nozzle where water is added immediately before the material exits the...

  • Shotcrete Homes Challenge Wood-Frame Construction

    The first shotcrete homes were built shortly after the shotcrete process was invented in 1910. In the 1960's a new shotcrete construction panel system was developed. Referred to as welded wire sandwich panels (WWSP), the system has a core of polyurethane or polystyrene insulation sandwiched between...

  • Shotcrete Application Tolerances

    Because of finishing techniques for shotcrete construction, some tolerances must be larger than those achievable with formed construction. This allowance for increased tolerances need not diminish the serviceability, durability, or integrity of a structure. Tolerances provide an indication of the...

  • Is entrained air required for wet-mix shotcrete?

    Does an air-entraining agent serve any purpose in wet-process shotcrete? I believe shotcrete is placed with such force that any air-entraining effect is negated. Should we use air-entraining agents in concrete that will be placed by wet-mix shotcreting?

  • Shotcrete Pumps and Related Equipment

    In the dry-mix shotcrete process, dry blended mix materials are delivered through a line or hose to a nozzle, where water is added. There are two distinct types of dry-mix shotcrete equipment: single- and double-chamber pumps, and continuous-feed or rotary pumps which come in two types: barrel and...

  • Is entrained air required in wet-mix shotcrete?

    Does an air-entraining agent serve any purpose in wet-mix shotcrete? I believe shotcrete is placed with such force that any air-entraining effect is negated. Should we use air-entraining agents in concrete that will be placed by wet-mix shotcreting?

  • Use Miniaturized Concrete Pump for Wet Shotcrete Repair

  • Developments in Shotcrete for Repairs and Rehabilitation

    Many developments in shotcrete technology during the 1980s have enhanced shotcreting capabilities. Today, both dry- and wet-mix shotcretes often contain supplementary cementing materials, which improve shotcrete workability and performance.

  • Wet- or dry-process shotcrete for spillway repairs?

    Our company will be repairing a concrete spillway for a dam. We'll be repairing slab-on-grade work and walls. We're investigating several repair methods including wet- and dry-process shotcreting. What are the relative advantages and disadvantages of these methods?