Material Safety Data Sheet
For
Unhardened Concrete
Section I - Identity
Manufacturer鈥檚 name and address:
Supplier鈥檚 name and address:
Emergency Telephone Number:
Chemical Name & Synonyms: Plastic concrete, concrete slurry, unset concrete
Date Revised: July, 2000
Section II - Hazardous Ingredients
Unhardened concrete is a slurry of portland cement, aggregate, silica sand, and various admixtures
used to enhance concrete performance characteristics.
CAS # % 1994-95 TLV OSHA PEL
10 mg/m3 15 mg/m3 Total Dust
Portland Cement 65997-15-1 >1%
5 mg/m3 Respirable
Dust
0.05 mg/m3* 10 mg/m3
Silica (quartz) 14808-60-7 >0.1%
% silica*+2
2 mg/m3 5 mg/m3
Calcium Oxide 1305-78-8 >1%
* Respirable fraction
NOTE: Unhardened concrete is a wet slurry and dusting is not a concern.
Section III - Physical/Chemical Characteristics
Boiling Point: Not applicable
Specific Gravity (H2O=1): 2.20 - 2.60
Vapor Pressure (mmHg): Not applicable
Melting Point: Not applicable
Vapor Density (Air=1): Not applicable
Evaporation Rate: Not applicable
Solubility in Water: Slight; 0.1-1.0%
Appearance and Odor: Thick gray slurry; alkaline, earthy odor
Section IV - Fire and Explosion Hazard of Material
Unhardened Concrete - Page 2
Flash Point (Method Used): Not Applicable
Flammable Limits: Not Applicable
LEL/UEL: Not Applicable
Extinguishing Media: Not Applicable
Special Firefighting Procedures: Not Applicable
Unusual Fire and Explosion Hazards: Not Applicable
Section V - Health Hazard Data
Route of Exposure: Inhalation? No
Skin? Yes
Eyes? Yes
Ingestion? Yes
Health Hazards (acute and chronic):
Acute: Contact with unhardened concrete and the 螒bleed鈮? water can produce severe skin
burns; development of pain symptoms may be delayed several hours. Irritation of
both eyes and tissue lining of nose can be severe. Prolonged contact can cause severe
alkali burns. Hypersensitive individuals may develop an allergic-type of dermatitis
(cement in concrete may contain traces of chromium). Pre-existing skin conditions
may be worsened.
Chronic: Dermatitis can result from continued contact of unprotected skin with unhardened
concrete. Exposure to respirable crystalline silica without the use of a respirator can
cause silicosis. Shortness of breath, coughing, diminished work capacity, reduced lung
volume and heart enlargement characterizes silicosis. Silicosis may aggravate other
chronic conditions and may increase the risk of pulmonary tuberculosis infection.
Unhardened Portland Silica
Calcium
Concrete Cement (Quartz)
Oxide
Carcinogenicity:
NTP: No No Yes No
IARC: No No Yes No
OSHA regulated: No No No No
Respiratory exposure to silica in unhardened concrete is not a concern.
Emergency and First Aid Procedures: Irrigate eyes immediately and repeatedly with water and
get prompt medical attention. Wash exposed skin areas with soap and water.
Unhardened Concrete - Page 3
Section VI - Reactivity Data
Stability: Unhardened concrete will consolidate and harden to a
continuous mass, compressive strength increasing with
time.
Incompatibility (Materials to Avoid): Not Applicable
Hazardous Decomposition or By-Products: Not Applicable
Hazardous Polymerization: Will not occur:
Conditions to Avoid: Not Applicable
Section VII - Precautions for Safe Handling and Use
Steps to be taken in case material is released or spilled: Emergency procedures are not
required.
Waste disposal method: Material can be disposed of as common waste or returned to a container
for later use if it is not contaminated.
Precautions to be taken in handling or storing: AVOID CONTACT WITH SKIN AND
EYES. Skin of hands, feet, and lower legs, including the knees, is especially vulnerable (e.g., concrete
finishers).
Other precautions: Use personal protective equipment (PPE) as described in Section VIII, Control
Measures.
Section VIII - Control Measures
Respiratory protection: Respiratory protection should not be necessary when handling
unhardened concrete. However, a NIOSH-approved dust
respirator is recommended when handling dry cement or when
cutting or otherwise abrading hardened concrete.
Ventilation: Local exhaust ventilation should not be necessary when
handling
unhardened concrete. However, local exhaust ventilation can
be
used to control airborne dust levels that may be generated
while
handling dry cement or when cutting or otherwise abrading
hardened concrete.
Protective gloves: Select chemical and abrasion resistant gloves to provide
protection against skin contact with unhardened concrete and
the 螒bleed鈮? water. Avoid contaminating the inside of
protective gloves with concrete or bleed water.
Unhardened Concrete - Page 4
Eye Protection: Use tight fitting goggles.
Other Protective Clothing or Equipment:
Use impermeable boots, gloves, aprons and clothing that will protect all potentially exposed skin,
and prevent contact with unhardened concrete and the bleed water. Immediately remove and/or rinse
with fresh water clothing that has become wetted or saturated by unhardened concrete or bleed water.
Contaminated clothing that remains in contact with the skin can cause skin burns.
Work/Hygienic Practices:
Wash hands frequently during the workday with fresh water and pH-neutral soap. Immediately after
working with unhardened concrete, workers should shower with pH-neutral soap and fresh water.
Avoid placing hands in the rinse water used to clean tools; concrete residue in the rinse water causes
the water to become highly alkaline. Precautions must be observed because the alkaline cement in
concrete can cause severe burns without warning; little heat is sensed.
This product neither contains nor is directly manufactured with any controlled ozone depleting
substances, Class I and II.
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