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About Shotcrete

January 15, 2020

[…] the following “top ten” sustainability advantages of shotcrete, ASA’s Sustainability page offers a wealth of information on the topic. Formwork savings of 50 to 100% over conventional cast-in-place construction; Formwork does not have to be designed for internal pressures; Complex shapes require very little, if any, […]

Become an Author

October 20, 2023

[…] approximately 17,000 copies and readership includes engineers, contractors, facility owners, manufacturers, distributors, educators, and public agencies involved in the shotcrete industry across 100 countries. Topics cover all areas of shotcrete such as buildings, parking structures, bridges, rehabilitation, materials selection, and methods. Each issue has […]

GeneralWhat is the best way to check the sand-to-cement ratio in gunite batch trucks? Is it normal (common) to get up to 10% air straight from the mixing auger? I had a gunite truck fill a 5 gal. (19 L) bucket with mixed material (sand and cement) then put it in my lab mixer and wetted it up to a 3 in. (75 mm) slump and ran a test for air, unit weight, and cast a set of cylinders. I am trying to figure out the sand-to-cement ratio, but I don’t have a cement diverter to run a real-time sand-to-cement ratio test, so I am testing dispensed material to see if it makes 70% strength in 7 days, which indicates a good mixture. Are there any other ways of checking sand-to-cement proportions? I tested the mixed material in a lab about 5 minutes after it was dispensed.

By “gunite batch truck” we assume you are referring to a volumetric mixer supplying material for a dry-mix shotcrete operation. Gunite is the original tradename for what we now call dry-mix shotcrete. Here’s the description from an ACI Materials Journal (January-February 1991 issue) article about the calibration of volumetric

Advertise in Shotcrete Magazine

January 24, 2020

[…] magazine reaches a growing number of 10,000+ readers that include current and potential designers, specifiers, and purchasers of shotcrete in well over 100 countries. Your advertisement in Shotcrete will reach the companies and people that you need to grow your business. Shotcrete’s cost for […]

2022 ASA Shotcrete Convention and Technology Conference

January 2, 2024

[…] the mountains. Fishing, camping, snowboarding, and hiking are hobbies Robert and his family regularly enjoy. Oscar Duckworth Oscar Duckworth is an ACI Certified Nozzleman with over 25,000 hours of nozzle time. He is both an ASA and American Concrete Institute (ACI) member, active in […]

2023 ASA Shotcrete Convention and Technology Conference

January 2, 2024

[…] (with 6 company exits) and a modern-day industrialist. He’s an inventor (60+ patent claims), an elite athlete, an author (1 book + 100s of articles), and a clean energy executive. He’s founded companies that have generated more than $30 Billion of economic impact, and […]