| Identification | Back Directory | [Name]
Cement, portland, chemicals | [CAS]
65997-15-1 | [Synonyms]
PORTLANDCEMENTDUST
Portland Cement total dust
Cement, portland, chemicals
Portland Cement respirable dust | [EINECS(EC#)]
266-043-4 |
| Chemical Properties | Back Directory | [Definition]
A type of hydraulic cement in the form of finely
divided, gray powder composed of lime, alumina,
silica, and iron oxide as tetracalcium alumino-
ferrite (4Ca O?Al
2
O
3
?Fe
2
O
3
), tricalcium aluminate
(3Ca O?Al
2
O
3
), tricalcium silicate (3Ca O?Si O
2
),
and dicalcium silicate (2Ca O?Si O
2
). These are
abbreviated, respectively, as C
4
AF, C
3
A, C
3
S, and
C
2
S. Small amounts of magnesia, sodium, potas-
sium, and sulfur are also present. Hardening does
not require air and will occur under water. Cement
may be modified with various plastic latexes in pro-
portions up to 0.2 part latex solids to one part cement
to improve adhesion, strength, flexibility, and cur-
ing properties. Water evaporation can be retarded by
adding such resins as methylcellulose and hydrox-
yethylcellulose. For further information, refer to the
Portland Cement Association, 5420 Old Orchard
Road, Skokie, IL 60077-1083.
| [Appearance]
odourless fine white to grey powder | [Stability:]
Stable. Will solidify over a period of hours if moistened or wet. Absorbs moisture from the air and solidifies over prolonged periods unless kept in a dry atmosphere. |
| Hazard Information | Back Directory | [Chemical Properties]
odourless fine white to grey powder | [General Description]
A gray to white, odorless powder. A finely ground (powdered) mixture of mainly 3CaO.SiO2 (tricalcium silicate), 2CaO.SiO2 (dicalcium silicate), CaO.Al2O3 (tricalcium aluminate), 4CaO.Al2O3.Fe2O3(tetracalcium aluminoferrite) and CaSO4.2H2O (calcium sulfate dihydrate). | [Reactivity Profile]
Sets in an exothermic reaction to a solid of low strength within hours after mixing with water. Continuing slower exothermic reactions harden the product to a tough gray stony mass. Incompatible with acids, acid chlorides, and acid anhydrides when set. Incompatible with ammonium salts and aluminum metal when wet and unset. | [Hazard]
Pulmonary function effects, asthma, respi-
ratory symptoms.
See concrete (1).
|
|
| Company Name: |
SKC Inc.
|
| Tel: |
724-941-9701 |
| Website: |
www.skcinc.com |
|