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Shotcrete Concrete Contractors Association
52 followers -
Shotcrete Concrete Contractors Association - Gunite - Shotcrete
Shotcrete Concrete Contractors Association - Gunite - Shotcrete

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Shotcrete Concrete Contractors Association's posts

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Nozzleman Certification at the Caldecott Tunnel Oakland California
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2016-10-22
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Shotcrete Core Grades

Grade 1:

Shotcrete specimens are solid; there are no laminations, sandy area or voids. Small air voids within a maximum diameter of 1/8 inch and maximum length of 1/4 inch are normal and acceptable. Sand pockets, or voids behind continuous reinforcing steel are unacceptable. The surface against the form or bond plane shall be sound, without a sandy texture or voids.

Grade 2:

Shotcrete specimens shall have no more than two laminations or sandy areas with dimensions not to exceed 1/8 inch thick by 1 inch long. The height, width, and depth of voids shall not exceed 3/8 inch. Porous areas behind reinforcing steel shall not exceed 1/2 inch in any direction except along the length of the reinforcing steel. The surface against the foam or bond plane shall be sound, without a sandy texture or voids.

Grade 3:

Shotcrete specimens shall have no more than two laminations or sandy areas with dimensions exceeding 3/16 inch thick by 1-1/4 inch long, or one major void, sand pocket, or lamination containing loosely bonded sand not to exceed 5/8 inch thick and 1-1/4 inch in width. The surface against the form or bond plane may be sandy with voids containing overspray to a depth of 1/16 inch.

Grade 4:

The core shall meet in general the requirements of Grade 3 cores, but may have two major flaws such as described for Grade 3 or may have one flaw with a maximum dimension of 1 inch (25mm) perpendicular to the face of the core with a maximum width of 1-1/2 inch. The end of the core that was shot against the form may be sandy and with voids containing overspray to a depth of 1/8 inch.

Grade 5:

A core that does not meet the criteria of core grades 1 through 4, by being of poorer quality, shall be classified as Grade 5.
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ACI Shotcrete Nozzleman Certification is becoming the standard for Shotcrete projects - contact: www.shotcrete.us #shotcrete  
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2016-10-21
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Shotcrete Core Grading #shotcrete  
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2016-10-21
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Become a member of the Shotcrete Contractors Association - Contact Info: (408) 640-6219 | czynda@jjalbanese.com #shotcrete #Membership
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Joseph J. Albanese - Concrete Contractors - Shotcrete is Concrete! #shotcrete   #concrete   #contractors  
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2016-10-21
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Early Structural Use of Shotcrete #shotcrete   #concrete   #equipment   #construction  
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2016-10-21
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Contractor's Responsibility - Doing The Job Right!

These Images Display What's Wrong:
• Rebound in floor
• Scaffolding
• No Blow pipe
• Safety PPE
• Rebound left in floor
• Bad joints –consolidation
• Safety on the reinforcement
• Rebound in footing
• Terrible Nozzleman placement
• Nozzleman Safety
• Joints need to be cleaned
• Rebound needs to be cleaned out of joints
• Shooting too high
• Bad Nozzleman
• Training
• Over spray
• Shooting too far away
• Dry mix top
• Wet mix bottom
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2016-10-21
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