Shotcrete Concrete Contractors Association

Non-profit Organization of Contractors, Engineers and others with common interest in promoting and educating the Concrete industry in the use of Shotcrete (wet mix concrete process) as means and methods for installing Concrete

ACI Shotcrete Nozzleman Certification
Call for Local ACI Chapter Session Dates

Certified Examiner

The Shotcrete Concrete Contractors Association (SCCA) has developed an education program that is current with all ACI Concrete industry standards.

SCCA works with Local ACI Sponsoring Groups
in administering the ACI Shotcrete Nozzleman Certification program which includes both classroom education and practical field education including a Concrete specific Safety class.

                       The Contractor is key in the success of the project which may include project specific mock-up’s and test panels ,which would demonstrate quality control and verify the capabilities of the Nozzleman along with the support by the contractor .



                        History Shotcrete wet mix concrete process

Starting in the mid 1950’s wet mix Shotcrete was introduced to the construction industry – these primitive attempts proved to be very beneficial to the industry, thru the 1970’s numerous structures have been constructed with WET MIX CONCRETE using the Shotcrete process as means and method to place the concrete

New Generation (Wet Mix Concrete Process)

In the early 1980’s the Concrete Industry takes a big step in the quality for mixing and batching ready mixed concrete, computer controlled ready mix plants are installed. Admixtures have become common and proven to increase the placement and durability of the concrete.

The equipment used in the Shotcrete (wet mix concrete process) has changed full circle from the start in the mid 50’s .Todays state of the art equipment is capable of pumping any slump and used in long distance tunnel projects as well as high rise concrete construction.

Description of Shotcrete (wmcp)

Material is generally delivered with Ready- mix trucks per ACI 318 - ASTM C94 Standard specification for ready mixed concrete. The Aggregates are a combination of coarse and fine aggregates per ASTM C-33. Concrete is pumped thru a system with air- injected at the nozzle to increase velocity and improve the placement of the concrete. The concrete being placed may be vibrated and placed with or without the nozzle in congested and horizontal applications.

Free Shotcrete Concrete Contractors Brochure

President’s Comments

I have been in Gunite / Shotcrete industry for over 40 years started as a laborer, foreman, superintendent – owner. I have been asked to explain the difference between Gunite and Shotcrete almost every day for the past 30 years. The questions seems to always be the same what is the difference between the two.
In the Shotcrete process the answer is simple
The Aggregates and Cement Powder - are mixed completely with the Water ,creating WET MIX CONCRETE.

SHOTCRETE IS CONCRETE
The goal of the Shotcrete Concrete Contractors Association is to offer Specifications and Guidance in the use of Shotcrete (wet mix concrete process) as means and methods for placing concrete in the Structural Concrete Industry.

I am a founding father for the ACI Nozzleman program which started over 12 years ago and a current C660 Shotcrete Certification committee voting member. I am a past president of the American Shotcrete Association and have been on the executive board – vice president for over ten years, I have written over 100 job specific and safety articles – with include study material used in ASA Nozzleman presentations

Thank You

Chris Zynda
President Shotcrete Concrete Contractors Association
General Manager / JJA Shotcrete Operations
Past President American Shotcrete Association
ACI Certified Examiner
Committee / ACI 506 -ACI 660
ASTM C/209
Approved ACI Examiner for Caltrans
ASA Approved Underground Trainer
ACI Examiner task group committee

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Information
Contact
Shotcrete Concrete
Contractors Association
(408) 640-6219
E-MAIL