Dunn

Dunn clay is a selection originating from our Gleason, TN processing facility and is characterized by moderately high levels of kaolin interspersed with the presence of some carbon content. It is an economical selection of clay that can be considered particularly where high volumes of clay may be required. The selection has an established history of performance in pavement sealer applications and structural brick compositions.

 Typical Data Sheet
Shipping Point: Gleason, TN

RAW PROPERTIES
Crude Color Light Grey
Dry Modulus of Rupture (psi)* 500
Wet Sieve Residue, +200 mesh (%) 0.35
Water of Plasticity (%) 36.0
Linear Drying Shrinkage (%) 7.1
Soluble Sulfates (ppm) 205
Filtration (ml) 26
Specific Surface Area (m2/g) 19.0
CEC/MBI (meq/100 ml) 10.5
pH 5.5
Particle Size (% less than)
5 Micron
1 Micron
.5 Micron
82
59
50
Median Particle Diameter (Micron) 0.50

*50% clay/50% flint, cast bars

CHEMICAL ANALYSIS %
Silicon Dioxide (SiO2) 60.77
Aluminum Oxide (Al2O3) 26.47
Iron (Ferric) Oxide (Fe2O3) 1.25
Titanium Dioxide (TiO2) 1.42
Calcium Oxide (CaO) 0.08
Magnesium Oxide (MgO) 0.62
Sodium Oxide (Na2O) 0.05
Potassium Oxide (K2O) 0.57
Loss on Ignition 8.74

 

FIRED PROPERTIES Cone 04 Cone 3 Cone 11
Linear Fired Shrinkage (%) 6.2 7.0 8.0
Absorption (%) 16.0 10.0 3.0
PCE…………………………….31