CHINA NATIONAL STANDARD: GB175-92 |
Description |
Grade |
Compressive Strength |
Bending Strength |
3days |
28days |
3days |
28days |
Portland Cement |
425R |
22.0 |
42.5 |
4.0 |
6.5 |
525
525R |
23.0
27.0 |
52.5
52.5 |
4.0
5.0 |
7.0
7.0 |
625
625R |
28.0
32.0 |
62.5
62.5 |
5.0
5.5 |
8.0
8.0 |
725R |
37.0 |
72.5 |
6.0 |
8.5 |
Ordinary portland cement |
325 |
16.0 |
32.5 |
3.5 |
5.5 |
425
425R |
21.0
21.0 |
42.5
42.5 |
4.0
4.0 |
6.5
6.5 |
525
525R |
22.0
26.0 |
52.5
52.5 |
4.0
5.0 |
7.0
7.0 |
625
625R |
27.0
31.0 |
62.5
62.5 |
5.0
5.5 |
8.0
8.0 |
Ordinary Portland Cement
CONFORMING TO CHINA NATIONAL STANDARD GB175-1999
(TEST OF STRENGTH AS PER GB/T 17671-1999 SAME AS ISO 679-89)
|
Items
|
CHINA NATIONAL STANDARD GB175-1999 |
GRADE 32.5R |
GRADE 42.5R |
CHEMICAL COMPOSITION
|
MGO |
5% MAX |
5% MAX |
SO3 |
3.5% MAX |
3.5% MAX |
LOSS ON IGNITION |
5% MAX |
5% MAX |
PHYSICAL PROPERTIES |
FINENESS (PASSING 0.08MM SIEVE)
|
90% MIN |
90% MIN |
SOUNDNESS(BY PAT TEST) |
PASSED |
PASSED |
SETTING TIME |
INITIAL |
45MINUTES MIN |
45MINUTES MIN |
FINAL |
10HOURS MAX |
10HOURS MAX |
COMPRESSIVE STRENGTH |
3 DAYS |
16.0MPA MIN |
21.0MPA MIN |
28 DAYS |
32.5MPA MIN |
42.5MPA MIN |
BENDING STRENGTH |
3 DAYS |
3.5MPA MIN |
4.0MPA MIN |
28 DAYS |
5.5MPA MIN |
6.5MPA MIN |
|
