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Stone and Tile Decor's Discussions
Adding fibre optics
Replied Nov 2
Pavers
1 Reply
Started this discussion. Last reply by Jim Ralston URBAN CONCRETE DESIGN Mar 9.
mixing face coat
Replied Mar 2
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Yes. All sizes.
Set them just like tile.
Has anyone made concrete pavers using GFRC or a hybrid GFRC formula?
Hi David, I will try to make the brewery on Wed.,but most likely take you up on the BBQ Friday night, as my wife and I are flying out later that night and I see you are very close to the airport. Thanks
GFRC Notes
Gray/White Portland Cement Types
Type I. General purpose Portland cement.
Type II. Higher Sulfate resistance (more suitable when concrete will come in contact with the ground, or buried in the ground).
Type III. Develops strength quickly, but is less strong in the long run. Used where quick hardening and strength is required.
Type IV. Low heat of hydration (meaning it gives off less heat than other cements as it sets and hardens). Sets very slowly, but is much stronger after curing than other types of cement. It is rarely used (Dams would be an application)
Type V. Very high Sulfate resistance. Used where cement is exposed to highly alkaline soil or water.
Large amounts of sulfates can cause cement to expand and distort. Type V helps resist this tendency.
Sand Notes
Here's a sample seive analysis from a QuikRete #30 bag of silicon sand:
Seive 30 - 6.4%
Seive 40 - 52.5%
Seive 50 - 36.9%
Seive 70 - 4.1%
That's why the specification for a "Fine" QuikRete sand says Seive 30-70 - it's a combination of sizes and you'll need to find out the what is in the sand you're using.
Pozzolan Notes
Pozzolans with a lower specific gravity than Portland cement (Portland SG is 3.15), when substituted for cement on an equal weight basis will exhibit an increase in paste volume at a fixed water/cement ratio.
Power Pozz
it's a metakaolin product. http://www.metakaolin.com/
made of calcined kaolin clay.
Type I. General purpose Portland cement.
Type II. Higher Sulfate resistance (more suitable when concrete will come in contact with the ground, or buried in the ground).
Type III. Develops strength quickly, but is less strong in the long run. Used where quick hardening and strength is required.
Type IV. Low heat of hydration (meaning it gives off less heat than other cements as it sets and hardens). Sets very slowly, but is much stronger after curing than other types of cement. It is rarely used (Dams would be an application)
Type V. Very high Sulfate resistance. Used where cement is exposed to highly alkaline soil or water.
Large amounts of sulfates can cause cement to expand and distort. Type V helps resist this tendency.
Sand Notes
Here's a sample seive analysis from a QuikRete #30 bag of silicon sand:
Seive 30 - 6.4%
Seive 40 - 52.5%
Seive 50 - 36.9%
Seive 70 - 4.1%
That's why the specification for a "Fine" QuikRete sand says Seive 30-70 - it's a combination of sizes and you'll need to find out the what is in the sand you're using.
Pozzolan Notes
Pozzolans with a lower specific gravity than Portland cement (Portland SG is 3.15), when substituted for cement on an equal weight basis will exhibit an increase in paste volume at a fixed water/cement ratio.
Power Pozz
it's a metakaolin product. http://www.metakaolin.com/
made of calcined kaolin clay.
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Tommy
I'm sure you can add an accelerator to your mix. I suggest contacting Nippon Electric Glass America. Their tech support should be able to recommend an accelerator. I have never used an accelerator.
Heat also speeds cure time and I have covered the tiles with a tarp and used a small space heater and the cure time was much less. I generally don't have to do this because I'm not in a hurry. Hope this helps. - Dave
In my opinion you are wasting your time and money using powerpoz, metakaolin or VCAS when making tile. All you need is GFRC and it's simple.
Type I/II portland cement = 9.8 lbs.
Silica Sand = 8.4 lbs.
Water = 2.7 lbs.
Polyplex (acrylic polymer) = 1.0 lbs.
(3/4" ARG Fiber) = .6 lbs.
Rheobuild 1000 (plasticizer) or similar = 1 to 3 tablespoons max.
Contact Nippon Electric Glass America (NEGA) for the ARG fiber and the Polyplex. Contact Master Builders for the plasticizer.
made of calcined kaolin clay.
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