Cement CEM I 42.5N
(设备/材料)
状态: New
位置或存放国家: Russia
服务工程支持: Yes
保证: Yes
价钱: 要求价格
描述:
It is used for the production of high-strength precast and prestressed reinforced concrete and monolithic structures. For the production of concrete class B25-B35, as well as B22.5 with increased release strength. It is allowed to use for concrete classes B15-B22.5 and B40, for concrete with increased release strength. And also for emergency recovery work, during the reconstruction of industrial enterprises, buildings and structures.
概观:
Name of the indicator | GOST 31108-2020 | TCZ | Spasskcement | Yakutcement |
Construction and technical properties of cement | ||||
Grinding fineness: - specific surface area, m2 /kg | Not standardized | 340 + 40 | 325-345 | — |
| - fineness of grinding (passing through sieve 008), % | Not standardized | 91.0 + 4.0 | 96.5-99.3 | 2.0-4.7 |
| Normal density of cement paste, % | Not standardized | 24.50 – 26.50 | 27.00-29.75 | — |
Setting time of cement paste (min): - the beginning | Not earlier than 60 min. | 120 – 170 | 170-230 | 120-190 |
| - end | Not standardized | 180 - 270 | 270-310 | 185-260 |
| Uniformity of volume change (expansion), mm | No more than 10 | 0.3 + 0.3 | 0.0-1.0 | 0.5-1.0 |
Compressive strength at the age of 2 days of normal hardening, MPa - bend | Not standardized | 4.30 – 4.60 | 16.0-19.0 | — |
| - compression | Not less than 10 | 10.20 – 20.00 | 16.0-19.0 | 16.0-20.5 |
Compressive strength at the age of 28 days of normal hardening, MPa - bend | Not standardized | 5.90 – 6.40 | 47.0-49.0 | - |
| - compression | Not less than 42.5 and no more than 62.5 | 46.20 + 3.50 | 46.0-49.0 | 42.5-49.2 |
| Loss on ignition, % | No more than 5.0 | 1.50 + 0.70 | 1.07-3.58 | 1.0-3.5 |
Insoluble residue, % | No more than 5.0 | 0.60 + 0.30 | 0.53-0.62 | 0.3-1.7 |
| Content of sulfur oxide (VI) SO3, % | No more than 3.5 | 2.50 + 0.30 | 2.31-3.00 | 2.3-3.4 |
| Content of chloride ion Cl - , % | Not more than 0.10 | 0.04 + 0.03 | 0.021-0.038 | 0.015-0.037 |
Sanitary and epidemiological properties of cement | ||||
| Specific effective activity of natural radionuclides A ff , Bq/kg | No more than 370 | 60 + 9 | 68 | 55 ± 7 |
Chemical and mineralogical composition of clinker,% | ||||
| Mass fraction of calcium oxide CaO | 66.35 + 0.40 | 64.44-67.15 | — | |
| Mass fraction of silicon oxide SiO 2 | 20.85 + 0.30 | 20.73-21.77 | — | |
| CaO/SiO2 ratio , % | Not less than 2 | 3.0-3.19 | ||
| Mass fraction of aluminum oxide Al 2 O 3 | Not standardized | 5.56 + 0.20 | 5.12-5.59 | — |
| Mass fraction of iron oxide Fe 2 O 3 | Not standardized | 4.26 + 0.15 | 3.78-4.20 | — |
| Mass fraction of magnesium oxide MgO | No more than 5.0 | 1.55 + 0.20 | 1.08-4.00 | 1.8-2.5 |
| Content of sulfur dioxide (VI) SO3 | Not standardized | 0.40 + 0.15 | 0.08-0.24 | — |
| Tricalcium silicate C 3 S | Not standardized | 62 - 65 | 59.87-65.35 | 61.0-73.12 |
| Dicalcium silicate C2S | Not standardized | 7 - 13 | 10.77-14.37 | 10.0-13.7 |
| Total content of C 3 S + C 2 S, % | Not less than 67 | 74.0-77.3 | ||
| Tricalcium aluminate (C 3 A) | Not standardized | 5 - 7 | 7.04-7.75 | 6.5-7.5 |
| Tetracalcium aluminoferrite (C 4 AF) | Not standardized | 12 - 14 | 11.46-12.77 | 10.0-14.44 |
OOO "Vostokcement"
地点: Russia, Vladivostok, Russkaya street, 65
主要产品/服务: Cement