A PRELIMINARY REPORT ON CLAYS OE ELORIDA 
229 
A sample of the washed clay from the Edgar Plastic Kaolin Com¬ 
pany’s Plant at Edgar had the following physical properties: 
Physical Properties of Edgar Plastic Kaolin (Lab. No. 0 - 57 ). 
Plasticity, judged by feel. Excellent. 
Water of plasticity. 34.65% 
Pore water. 0.21% 
Shrinkage water .. 34.44% 
Linear air shrinkage. 10.0 % 
Volume air shrinkage. 27.5 % 
Modulus of rupture, average. 169.1 pounds per square inch. 
Slaking test. 5 minutes. 
Steel hard at cone 1. 
Fire tests: 
perature. 
Linear Shr. 
Per Cent. 
Absorption. 
Per Cent. 
Porosity. 
Per Cent. 
Color. 
950°C. 
5.0 
29.49 
45.75 
White. 
1050 
5.2 
29.46 
46.60 
White. 
1150 
6.0 
20.32 
37.80 
White. 
1190 
7.5 
21.45 
37.60 
White. 
1230 
12.0 
13.06 
27.50 
White. 
1310 
12.0 
14.30 
30.20 
White. 
1370 
12.5 
16.80 
White. 
1430 
13.0 
7.07 
White. 
A sample of the washed clay from the Lake County Clay Company’s 
plant, near Okahumpka, had the following physical properties: 
Physical Properties of Lake County Clay Company Sedimentary Kaolin 
(Lab. No. 0 - 84 ). 
Plasticity, judged by feel. Excellent. 
Water of plasticity. 31.85% 
Pore water... 0.42% 
Shrinkage water . 31.43% 
Linear air shrinkage... 8.0 % 
Volume air shrinkage. 22.0 % 
Modulus of rupture, average. 136.3 pounds per square inch. 
Slaking test. 3 minutes. 
Steel hard at cone 3. 
Fire tests: 
Temperature. 
950°C. 
1050 
1150 
1190 
1230 
1310 
1370 
1430 
Linear Shr. 
Per Cent. 
3.5 
4.5 
5.4 
10.0 
10.0 
14.5 
17.0 
18.0 
Absorption. 
Per Cent. 
34.61 
30.79 
23.62 
23.60 
16.09 
14.74 
6.38 
5.14 
Porosity. 
Per Cent. 
49.50 
47.20 
41.20 
34.75 
33.50 
30.75 
16.42 
12.40 
Color. 
White. 
White. 
White. 
White. 
White. 
White. 
White. 
White. 
