1) Furnish all labor, materials, and equipment for the following: a) Demonstrate in preconstruction testing that the submitted shotcrete mixture design(s) satisfies the performance requirements of this specification; Shotcrete. Winter 2008 18 b) Shoot a preconstruction mock-up of the reinforced shotcrete walls to demonstrate that the shotcrete materials, mixture(s), equipment, crew, and construction sequence and methods used are capable of producing a product conforming to these specifications and acceptable to the Engineer; c) Provide quality control services as necessary to ensure compliance of the completed work with the requirements of this specification. Shoot test panels at the frequency specified for independent quality assurance testing by the Engineer; d) Verify that the reinforcing steel bars in the walls are installed in a manner that is acceptable to the design Engineer and conducive to the shotcrete construction process; e) Provide all hoarding, covers, or other protection devices necessary to protect all fixtures and installations in the shotcrete construction area from contamination or damage from the shotcrete construction process. In particular, protect such fixtures and installations from impact from the shotcrete nozzle stream, rebound, overspray, and shotcrete mist or dust; f) Provide all scaffolding, platforms, lift equipment, or other devices necessary to provide the shotcrete nozzlemen and other crew and inspectors with safe and proper access to the shotcrete work; g) Provide suitable ventilation, lighting, fans, curtains, or other devices necessary to provide the shotcrete nozzlemen and crew with good visibility and control of shotcrete mist, dust, overspray, and rebound; h) Provide all forming, bracing, guide wires, and finishing tools necessary to enable construction of the reinforced shotcrete elements to the specified profiles, tolerance, finish; i) j) Apply shotcrete to the walls using prequalified nozzlemen and crew and approved shotcrete mixture(s); and Finish shotcrete to specified finish, dimensions, tolerance, and line and grade. Provide moist curing and protection as specified; k) Provide assistance to the Engineer for quality assurance testing including access for any coring required by the Engineer. Remove and replace, at no cost to the Owner, any defective shotcrete or work that is nonconforming to the project specifications; and 1) Leave completed shotcrete work in a clean condition, free of any deposits of excess shotcrete, overspray, rebound, or other contaminants. Remove all such materials from the work area and dispose of at an approved disposal site. 2) Implement a health, safety, and environmental protection program that conforms to the requirements of the Engineer and any other authorities having jurisdiction. Such programs shall include, but not be limited to the following: a) Ensure that all equipment, scaffolding, shoring, bracing, and other devices used on the project meet the requirements of the authorities having jurisdiction; b) Put in place a mandatory health and safety training program for all workers, inspectors, and other persons entering the workplace; and c) Protect all workers and other personnel from applied shotcrete and rebound during the shotcrete application process. As a minimum, all workers and personnel in active shotcreting areas shall wear appropriate respiratory protection devices as well as appropriate clothing and other personal protection equipment (hard hats, eye protection, safety boots, and reflective vests). Provide eye wash equipment at shotcrete site.
