PORTLANDCEMENT (PC400-D0) GOST 10178 – 85

Is used for production of concrete, built-up and monolithic frames, buildings and constructions for differentpurposes.
Cement quality characteristic.

 

Indexes	Requirements GOST 10178-85	Practical results
1. Grinding fineness, sieve residue 008, %	Minimum 15	8 – 12
2. Setting terms, hour, min.
start	Minimum 45 min	2,30 – 4,20
end	Maximum 10 hours	3,20 – 5,20
3. Cement bearing point within 3 days, Mpa
When bent	No requirements	3,5 – 4,8
When compressed	No requirements	20,0 – 24,0
4. Cement bearing point when steaming, Mpa
When compressed	No requirements	25,0 – 30,0
5. Cement bearing point within 28 days, Mpa
When bent	Minimum 5,4	5,4 – 6,2
When compressed	Minimum 39,2	39,2 – 43,0
6. Group according to steaming efficiency	1 – 3	1 – 2
7. SO3 ,% content	1,0 – 4,0	1,5 – 3,0
8. R2O total., % content	Maximum 1,20	1,05 – 1,20
9. Volume change regularity	kept	kept
10. Flash setting signals	Should not happen	no
11.. Cement specific surface area, m²/kg		250 – 330

 

Clinker chemical analysis, %

 

ppp	SiO2	Al2O3	Fe2O3	CaO	MgO	SO3	R2Oобщ
0,2 – 0,4	21,7 – 22,3	4,3 – 4,7	4,4 – 4,7	65,0 – 66,0	1,15 – 1,30	0,6 – 0,8	1,00 – 1,20

СаOсв	FeO	Kн (с уч. СаOсв)	п	р
0,3 – 1,0	0,2 – 0,3	0,88 – 0,92	2,4 – 2,6	0,9 – 1,1

 

Estimated mineral composition of clinker

 

C3S	C2S	C3A	C4AF
59 – 63	15 – 19	4 – 5	14