Clay Testing for Dave Edgerton

Share from Insight-live.com (Lab Documentation and Calculation System) by Digitalfire.


Project Name

Saskatchewan Clays Testing Program

Project Codenumber

UnAssigned

Notes

Received from Dave Edgerton, Nov 16, 2020.

These were only slaked and propeller mixed as a slurry. No pregrinding of the powder was done. No barium was added to precipitate soluble salts.

Notes:
The Flintoft quarry has been mined but the strata continues over a wide area so a bit of simple surveying is in order.

The Halbrite deposit is on PFRA land. They were open the Dave getting a few pickup loads and it would be possible to write up a contract with them with some compensation to get access to the stockpile.

Flintoft Quarry #2004

Ball Clay

Code #

L4383

Notes

*Under 2026, over 2027

Similar to Plainsman 3B, but cleaner and more vitreous, a vitreous ball clay. This is the most promising of the clay for pottery. It fires to porcelain density below cone 6. And is highly plastic. Yet dries very well. And fires with no speckle, not even in reduction. It matures at cone 6 yet is still stable at cone 10! Amazing!

However the fired shrinkage is high across the entire range. This would blend well with a high temperature, non-plastic material (the latter cutting the plasticity), this one supplying the feldspar.

Another possibility is that this material would work around cone 2. The firing shrinkage would be lower. With a talc addition it might be possible to have stoneware density at low fire. Very exciting! But that drying shrinkage needs to be cut with a non-plastic filler. Maybe this is the material to mix with flyash. Or maybe it could be mixed with plaster and set instead of dry-and-shrink.

Pictures

L4383 closeup of plastic material surface

L4383 DFAC disk dried

L4383 Fired tile, DFAC disk Cone 10R

L4384 Fired bars (cone 10R downward)

Cone 10 all the way down to cone 6.

G1947U Working normally at cone 10R

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
1 91.1 86.13 30.91 33.92 1.0 8.9% 5.5% 9.7%
2 91 85.73 30.2 32.88 2.0 9.0% 5.8% 8.9%
3 91.17 85.39 29.76 32.11 2.7 8.8% 6.3% 7.9%
4 91.42 84.73 29.93 31.34 4.0 8.6% 7.3% 4.7%
5 91.52 84.54 28.43 28.78 4.8 8.5% 7.6% 1.2%
6 90.62 82.56 29.87 29.87 5.7 9.4% 8.9% 0.0%
7 90.62 82.42 30.38 30.38 6.8 9.4% 9.0% 0.0%
8 90.84 82.64 29.95 29.93 7.8 9.2% 9.0% -0.1%
9 90.95 82.43 29.85 29.85 8.8 9.1% 9.4% 0.0%
10 90.79 82.51 29.1 29.11 10 9.2% 9.1% 0.0%
12 90.8 82.84 29.42 29.42 10.5R 9.2% 8.8% 0.0%

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 46 tr tr tr tr

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 29.11 20.36 18.43 30.1% 9.5%

XML (to paste into Insight)

Born: 2020-11-24, Modified: 2021-01-13 11:06:49

Flintoff Quarry - #2026

Layer Under 2023

Code #

L4376

Notes

*Thickness 2-3039;
A plastic and clean burning ball clay with some, but not excessive, soluble salts.
Same or similar to L4382

Pictures

L4376 lumps

L4376 closeup of plastic material surface

L4376 DFAC disk dried

L4376 Fired tile, DFAC disk Cone 10R

L4376 Fired bars (cone 10R downward)

G1947U shivering at cone 10R

This is a standard glaze, since it shivers it is lower than typical expansion. This is typical of a ball clay.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
5 91.58 86.85 32.25 35.06 4.8 8.4% 5.2% 8.7%
6 91.8 86.79 32.51 35.18 5.7 8.2% 5.5% 8.2%
7 92.15 86.69 32.55 34.80 6.8 7.8% 5.9% 6.9%
8 91.88 86.51 32.92 34.77 7.8 8.1% 5.8% 5.6%
9 91.6 85.52 32.28 33.75 8.8 8.4% 6.6% 4.6%
10 91.21 84.88 32.87 34.03 10 8.8% 6.9% 3.5%
12 91.7 85.59 32.24 33.78 10.5R 8.3% 6.7% 4.8%

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 45.5 tr tr 0.03 0.2

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 33.48 24.99 22.85 25.4% 8.6%

XML (to paste into Insight)

Born: 2020-11-18, Modified: 2021-04-11 07:57:58

Flintoft Quarry #2023

Code #

L4373

Notes

*Layer of white under cap layer. Flintoft quarry. Thickness: 1 1/2039;

A sandy, white burning refractory clay. Similar to Plainsman RE, but more plastic. Relatively free of particulate iron.

Need to do sieve analysis for this again to confirm, number appear too low.

Pictures

L4373 lumps

L4373 closeup of plastic material surface

L4373 Flintoft Quarry +70 mesh

L4373 DFAC disk dried

L4373 Fired tile, DFAC disk Cone 10R

L4373 Flintoft Quarry #2023 fired bars

G1947U working normally

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
5 93.67 6.3%
6 93.4 90.41 34.78 40.59 5.8 6.6% 3.2% 16.7%
7 93.56 90.11 36.03 41.93 6.8 6.4% 3.7% 16.4%
8 93.44 89.71 35.26 40.8 7.8 6.6% 4.0% 15.7%
9 93.34 89.18 36.12 41.33 8.8 6.7% 4.5% 14.4%
10 93.42 89.08 36.37 41.39 10 6.6% 4.6% 13.8%
12 93.66 87.68 33.78 38.88 10.5R 6.3% 6.4% 15.1%

SOLU - Soluble Salts

DRY
1 VLight

DFAC - Drying Factor

DFAC SOLD
1 A000 NIL

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 67.0 0.03 0.06 0.31 3.12
2 70 tr 0.07 0.41 5.21

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 33.73 25.9 23.87 23.2% 7.8%

XML (to paste into Insight)

Born: 2020-11-16, Modified: 2020-12-21 20:00:37

Flintoft Quarry #2024

Ball Clay Cover

Code #

L4379

Notes

*A few rocks
6’ thick

A buff burning refractory stoneware. Plasticity similar to a standard throwing body. Fired speckle at cone 10R. Needs 10-15% feldspar to produce a cone 10 stoneware.

Pictures

L4379 Flintoft Quarry #2024 raw lumps

L4379 closeup of plastic material surface

L4397 70mesh+ particles

L4379 DFAC disk dried

L4379 Fired tile, DFAC disk Cone 10R

L4379 Fired bars (cone 10Rdownward)

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 93.24 86.66 35.69 38.91 5.7 6.8% 7.1% 9.0%
7 93.24 85.99 36.17 39.02 6.8 6.8% 7.8% 7.9%
8 93.39 85.9 34.44 37.02 7.8 6.6% 8.0% 7.5%
9 93.27 85.43 34.84 37.06 8.8 6.7% 8.4% 6.4%
10 93.32 85.36 36.24 38.36 10 6.7% 8.5% 5.8%
12 93.35 86.42 36.7 39.48 10.5R 6.7% 7.4% 7.6%

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 50 0.1 0.14 0.38 0.82

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 28.81 22.39 20.17 22.3% 9.9%

XML (to paste into Insight)

Born: 2020-11-22, Modified: 2020-12-17 18:47:48

Flintoft Quarry #2025

Code #

L4371

Notes

*Black clay under sample 2023
Thickness: 12 inches

In the wet state this looks and feels like Plainsman 3C. It is very plastic. Slakes down easily.

Feels, dries and fires like a ball clay.

Pictures

Lump form of L4371

Most lumps were 1" or smaller.

L4373 DFAC disk shows some soluble salts

L4371 Fired tile, DFAC disk Cone 10R

L4371 Fired bars (cone 10R downward)

G1947U glaze shivers, has dry surface -Cone 10R

This is a standard glaze, since it shivers it is lower than typical expansion. This is typical of a ball clay.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 92.17 87.2 35.36 37.49 5.8 7.8% 5.4% 6.0%
7 91.9 86.77 36.15 38.21 6.8 8.1% 5.6% 5.7%
8 91.8 86.68 37.6 39.57 7.8 8.2% 5.6% 5.2%
9 91.71 86.02 37.25 38.85 8.8 8.3% 6.2% 4.3%
10 91.51 85.83 37.52 38.95 10 8.5% 6.2% 3.8%
12 91.65 86.32 37.33 38.89 10.5R 8.3% 5.8% 4.2%

DFAC - Drying Factor

DFAC SOLD
13 C130+ MEDIUM

SIEV - Sieve Analysis 35-325 Wet

TOT 35M 48M 65M 100M 150M
1 64.98 .21 .03 .34 2.06 0.5

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 35.84 27.3 24.89 23.8% 8.8%

XML (to paste into Insight)

Born: 2020-11-16, Modified: 2020-12-13 20:14:47

Flintoft Quarry #2027

Base Layer

Code #

L4374

Notes

*Under 2026
Several layers between 2026 and 2027
Sandy, yet sample arrived in three large lumps.

Very sandy like RE. But plastic enough to form with no problem. Refractory.

Pictures

L4374 lumps

L4374 closeup of plastic material surface

L4374 DFAC disk dried

L4374 Fired tile, DFAC disk Cone 10R

L4374 Fired bars (cone 10R downward)

G1947U working ok but less glossy at cone 10R

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 94.45 93.21 36.83 44.29 5.7 5.6% 1.3% 20.3%
7 94.45 93.13 37.98 45.65 6.8 5.6% 1.4% 20.2%
8 94.35 93.2 38.29 45.74 7.8 5.7% 1.2% 19.5%
9 94.63 93.1 37.85 45.12 8.8 5.4% 1.6% 19.2%
10 94.54 92.78 38.28 45.46 10 5.5% 1.9% 18.8%
12 94.5 93.19 36.89 43.86 10.5R 5.5% 1.4% 18.9%

DFAC - Drying Factor

DFAC SOLD
1 A000 light

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 87 0.13 0.83 22.03 13.14

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 37.73 29.78 27.96 21.1% 6.1%

XML (to paste into Insight)

Born: 2020-11-18, Modified: 2020-12-13 20:18:34

Flintoft Quarry #2029

Across Valley

Code #

L4382

Notes

*No overburden
Possibly same as #2026 L4376

An addition of talc could mature it at cone 8 (e.g. 3%).
Or, maybe 15% feldspar would cut plasticity and vitrify it at cone 10.

Pictures

L4382 closeup of plastic material surface

L4382 DFAC disk dried

L4382 Fired tile, DFAC disk Cone 10R

L4382 Fired bars (cone 10R downward)

G1947U Working normally at cone 10R

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 91.45 85.71 32.72 35.01 5.7 8.6% 6.3% 7.0%
7 91.46 85.32 31.89 33.78 6.8 8.5% 6.7% 5.9%
8 91.33 84.95 31.54 33.03 7.8 8.7% 7.0% 4.7%
9 91.21 84.4 31.09 32.27 8.8 8.8% 7.5% 3.8%
10 91.52 84.3 30.31 31.07 10 8.5% 7.9% 2.5%
12 91.4 85.04 28.88 29.99 10.5R 8.6% 7.0% 3.8%

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 45 tr tr 0.04 0.04

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 33.97 24.62 22.41 27.5% 9.0%

XML (to paste into Insight)

Born: 2020-11-22, Modified: 2021-04-11 08:19:18

Blue Hills Quarry #2001

Code #

L4378

Notes

*3 ft thick
A refractory stoneware. Light burning with some iron specks.

Plasticity typical of a pottery clay for throwing. Fairly clean. With 5-10% feldspar this could be a good stoneware for cone 10.

Pictures

L4378 Blue Hills Quarry #2001 raw clay

+70 mesh material

L4371 DFAC disk dried

L4378 Fired DFAC disk Cone 10R

G1947U Working normally at cone 10R

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

L4378 Fired bars (cone 10R downward)

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 92.42 87.82 36.11 38.48 5.7 7.6% 5.0% 6.6%
7 92.74 87.9 36.92 40.03 6.8 7.3% 5.2% 8.4%
8 92.81 87.63 37.37 39.93 7.8 7.2% 5.6% 6.9%
9 92.85 87.25 36.63 38.83 8.8 7.2% 6.0% 6.0%
10 92.79 86.94 36.12 37.83 10 7.2% 6.3% 4.7%
12 92.8 87.38 34.95 37.20 10.5R 7.2% 5.8% 6.4%

DFAC - Drying Factor

DFAC SOLD
1 C110 Light

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 50.75 0.16 .04 0.13 0.53

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 17.86 13.53 12.43 24.2% 8.1%

XML (to paste into Insight)

Born: 2020-11-19, Modified: 2021-04-11 08:12:08

Blue Hills Quarry #2018

4’ layer

Code #

L4380

Notes

*Screened to 35#
I was told this is the same as #2001 L4378, but not according to these tests.

A fireclay. High porosity through the firing range. Good plasticity. Low fired shrinkage. This would be usable in ceramics, in amounts as high as 50% in recipes.

Dave dug #2018 and #2001 3 years apart, possibly not quite in the same location. He remembers 2001 was hard and blocky when dug and 2018 was a bit more crumbly. The two locations are within 100 feet of each other.

Pictures

L4380 closeup of plastic material surface

L4380 +50mesh material

L4380 DFAC disk dried

L4380 Fired tile, DFAC disk Cone 10R

G1947U Working normally at cone 10R

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

L4380 Fired bars (cone 10R downward)

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 92.66 89.21 33.94 38.40 5.7 7.3% 3.7% 13.1%
7 92.78 88.97 34.82 39.16 6.8 7.2% 4.1% 12.5%
8 92.61 88.84 35.6 39.83 7.8 7.4% 4.1% 11.9%
9 92.66 88.7 35.27 39.05 8.8 7.3% 4.3% 10.7%
10 92.85 88.67 35.06 38.64 10 7.2% 4.5% 10.2%
12 92.7 89.07 34.92 38.85 10.5R 7.3% 3.9% 11.3%

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 79.0 0.08 0.29 0.63 2.34

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 37.95 28.73 26.36 24.3% 8.2%

XML (to paste into Insight)

Born: 2020-11-22, Modified: 2021-04-11 08:16:46

Blue Hills Quarry #2020

Code #

L4377

Notes

*Outcrop. Thickness: 2 ft.
50.103267, -105.420278

A plastic, non-refractory ball clay. Very clean burning. Medium soluble salts. Drying shrinkage is high. This could make up 50% of a stoneware body recipe.

Pictures

L4377 lumps

+70 mesh material

L4377 DFAC disk dried

L4377 Fired tile, DFAC disk Cone 10R

L4377 Fired bars (cone 10R downward)

G1947U Working normally at cone 10R

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 91.38 85.07 29.38 31.48 5.7 8.6% 6.9% 7.1%
7 91.41 84.39 30.44 32.14 6.8 8.6% 7.7% 5.6%
8 91.5 84.13 30.61 31.78 7.8 8.5% 8.1% 3.8%
9 91.46 84.21 31.25 32.28 8.8 8.5% 7.9% 3.3%
10 91.82 84.2 28.48 30.12 10 8.2% 8.3% 5.8%
12 91.5 84.44 30.44 31.46 10.5R 8.5% 7.7% 3.4%

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 74.5 0.14 0.06 0.2 0.21

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 34.15 24.88 22.27 27.1% 10.5%

XML (to paste into Insight)

Born: 2020-11-18, Modified: 2021-01-19 12:12:18

Blue Hills Quarry #2021

Fireclay

Code #

L4375

Notes

*Previously mined for Claybank brick plant.

An exceptionally refractory material. With lower drying shrinkage. This could likely be used pure to make firebricks. Good firebricks cost more than $5 each and if they are the insulating type, they are light and use very little clay.

Looks the Plainsman RE sand that we mine at Ravenscrag, but this much more plastic, no problem at all rolling and making test specimens. Very pleasant feel. That means this has more kaolin and less sand than our material.

Some iron particulates.

The landowner is curious to see if it has any commercial value. There appears to be no stockpile.

Pictures

Lump material L4374

Most of the material was quite fine, few lumps. It weathers down more than the other samples.

Closeup of plastic L4374 material

+50 mesh material

L4375 DFAC disk dried

L4375 Fired tile, DFAC disk Cone 10R

L4375 Fired bars (cone 10R downward)

G1947U Working normally at cone 10R

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 93.51 91.74 36.44 43.19 5.8 6.5% 1.9% 18.5%
7 93.63 91.7 36.64 43.29 6.8 6.4% 2.1% 18.1%
8 93.49 91.39 37.41 43.92 7.8 6.5% 2.2% 17.4%
9 93.75 91.17 38.05 44.47 8.8 6.3% 2.8% 16.9%
10 93.83 91.15 38.07 44.31 10 6.2% 2.9% 16.4%
12 94.31 92.08 36.85 43.13 10.5R 5.7% 2.4% 17.0%

DFAC - Drying Factor

DFAC SOLD
1 A000 nil

SIEV - Sieve Analysis 35-325 Wet

TOT 35M 48M 65M 100M
1 55.74 0.63 0.24 1.72 .06

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 33.95 26.44 24.52 22.1% 7.3%

XML (to paste into Insight)

Born: 2020-11-17, Modified: 2021-02-04 09:57:08

Halbrite kaolin #2002

Code #

L4381

Notes

*Washed with an excess of water and run it through a 12' long riffle and then into a cloth lined drying trough. Slurry water content was reduced and half a cubic yard was blended. About 50% was removed as sand.

A vitreous and plastic kaolin. Would make a ivory-burning cone 10 porcelain with about 10% feldspar addition. No other additions may be needed if it contains enough quartz (not even bentonite).

The drying shrinkage is high yet the drying performance is good, very unusual!

Pictures

L4381 Halbrite kaolin #2002 raw lumps

L4381 closeup of plastic material surface

L4381 DFAC disk dried

L4381 Fired tile, DFAC disk Cone 10R

L4381 Fired bars (cone 10R downward)

G1947U Working normally at cone 10R

This is a standard glaze, it has not crazed on this clay so we know it does not have a higher-than typical pottery stoneware thermal expansion. It has not shivered either, so it does not have a significantly lower-than-typical expansion either.

Testdata

SHAB - Shrinkage/Absorption

DLEN FLEN FWT BWT CONE DSHR FSHR ABS
6 92.6 83.88 27.9 30.60 5.7 7.4% 9.4% 9.7%
7 92.75 83.49 27.87 30.23 6.8 7.3% 10.0% 8.5%
8 92.46 82.78 28.33 30.45 7.8 7.5% 10.5% 7.5%
9 92.33 82 28.81 30.40 8.8 7.7% 11.2% 5.5%
10 92.37 81.47 29.26 30.69 10 7.6% 11.8% 4.9%
12 92.5 80.96 30.25 31.17 10.5R 7.5% 12.5% 3.0%

DFAC - Drying Factor

DFAC SOLD
2 A000 Heavy

SIEV - Sieve Analysis 35-325 Wet

TOT 48M 65M 100M 150M
1 48.3 0 0 0 0

LDW - LOI/Density/Water Content

WWGT DWGT FWGT H2O LOI DENS
1 31.8 22.59 19.82 29.0% 12.3%

XML (to paste into Insight)

Born: 2020-11-22, Modified: 2021-04-11 07:35:57