คุณสมบัติทางกายภาพ
Specification |
Typical Test |
API Standard |
| Viscometer Dial Reading @ 600 rpm |
40-50 |
30 min. |
| Viscometer Dial Reading @ 300 rpm |
28-35 |
- |
| Plastic Viscosity , cp |
12-15 |
- |
| Yield Point , lb/100 ft 2 |
16-20 |
3Pv max. |
| Filtrate Loss , ml |
13.5-14.5 |
15.0 max. |
| Dry Screen (passing 75 micron) , % |
75 min |
- |
| Wet Screen (retained 75 micron) , % |
1.5-2.0 |
4.0 max. |
| pH (6% suspension) |
9-11 |
- |
| Moisture Content , % |
8-10 |
10.0 max. |
|
| Liquid Limit , % |
|
500 |
|
min |
| Plastic Limit , % |
|
40 |
|
min |
| Swelling Index |
|
25 |
|
ml per 2 g of clay , min |
| Loose bulk density |
|
0.80-0.95 |
|
g/ml |
| apparent settled density |
|
1.05-1.10 |
|
g/ml |
| specific gravity |
|
2.5-2.7 |
|
|
|
