DESCRIPTION
MAC-GEL SP GRADE is prepared from MAC-GEL STANDARD GRADE which complied to API SPEC 13A. By adding polymers and thinners .MAC-GEL SP GRADE improve desanding process and good performance for excavation of diaphragm wall.

 

CHEMICAL PROPERTIES

 
 
 
 
 

 

PHYSICAL PROPERTIES

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

 

TECHNICAL CHARACTERISTICS (at 16 hr.)

SPECIFICATION
CONCENTRATION
35 kgs/m 3
40 kgs/m 3
Marsh Viscosity
34
36
R 600 dial reading
13
18
R 300 dial reading
9
12
Plastic Viscosity
4
6
Apparent Viscosity
6.5
9
Yield Point
5
6
Filtrate Loss
16.4
14.6
Gel Strength , 10 sec
4
13
Gel Strength , 30 min
9
20
pH
9.90
9.92