GFRC Mix Calculator
$29.99
This convenient, easy-to-use GFRC calculator:
- Eliminates the need for math and formulas
- Reduces costly mistakes
- Saves time
No more fumbling with math and formulas for your mist coat and backer, causing confusion and mistakes.
This is a calculator for a GFRC mix design. For a complete video course on how to make GFRC, including this calculator, see Professional GFRC for Concrete Countertops.
This convenient, easy-to-use GFRC calculator:
- Eliminates the need for math and formulas
- Reduces costly mistakes
- Saves time
GFRC mix formulas are public knowledge, but they are not easy to use. You have to fumble with math and formulas for your mist coat and your backer coat, causing confusion and mistakes. Using Integrity PowerPack simplifies things, but you will still have to do some complicated and confusing math, especially for the fiber calculation.
The calculator computes exactly how much of each ingredient, including fibers, and produces a printable batch report for you to use while mixing. All you do is enter the size of your project, and the calculator does the rest. You don't have to do any math, and you're assured of a precise mix every time.
The calculator also computes exactly how much each of your mix ingredients cost, helping you analyze your profitability. And, it automatically calculates the number of batches based on your gun or mixer size. You can save your batch report for each project so that you have a record of exactly what you did for that client. Both English and metric weights are provided.
This calculator uses Integrity PowerPack and Integrity UltraFibers. We also offer PowerBlend (just add water).
It comes as downloadable Microsoft Excel spreadsheet. It is compatible with Windows programs and can be used on a Mac with Microsoft Excel emulator.
Q & A
GFRC Mix Calculator
The precast calculator creates non-fiber reinforced concrete that relies on steel reinforcement for strength. It's more old-school concrete, if you will. The precast mix calculator gives you an all-sand mix that is suited for hand packing, but it is not able to be made flowable. The other precast mix is a more conventional aggregate mix that is based on pea-gravel. This kind of concrete can be made flowable. But both MUST have steel reinforcement added to give slabs strength. It's a legacy calculator that few professionals use, since most now use GFRC.
The GFRC calculator is designed to create glass fiber reinforced concrete (GFRC). GFRC does not use steel reinforcement, but can have fiberglass rebar added in very highly stressed areas. Normally no additional reinforcement is required. All of our Integrity products are designed to be used in GFRC. GFRC can be made pourable, hand-packable, sprayable, and trowelable.
GFRC uses fine sand as the only aggregate. If you are not spraying it then it does not need to be uniform. Sand that is fine produces better strength and workability than coarse sand. Here's a picture of an ideal sand for GFRC: https://concretecountertopinstitute.com/wp-content/uploads/2024/10/silica-blasting-sand-for-GFRC.jpg
The calculator can be used in Google docs without owning a copy of Excel.
Our GFRC mix calculator comes in both metric and imperial units. The GFRC Mix Calculators does give exact figures for each component. All of our self studies are available online.
Here is a direct link to ALL the information we have our our website in regards to calculators:
GFRC Mix Calculator: https://concretecountertopinstitute.com/?s=calculator
Yes, you are welcome to email me at [email protected] with any questions. Kim
Hi William,
Thank you for the question. We look forward to seeing you in October.
Yes, this mix calculator includes a formula/calculator for CTS Rapid Set Cement-All (a convenient blend of CSA cement and sand). If you are using straight CTS Rapid Set Cement (pure CSA cement), you can simply substitute it 100% for Portland.
The GFRC self-study training (Professional GFRC) does include this mix calculator, so there is no need to purchase both.
Yes, all you do is enter the size of your project, and the calculator tells you exactly how much of each ingredient (sand, cement, water, etc.) to use. However, for a DIY project we do not recommend GFRC because there are speciality ingredients and equipment required. If you are looking for a DIY mix, please see https://concretecountertopinstitute.com/shop/diy-concrete-countertop-video-course/.
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