Concrete additives, also known as admixtures, are commonly used to improve concrete performance by accelerating or slowing curing, reducing water demand, improving workability, or providing other specialized properties. While these products offer important construction benefits, many contain chemicals that can cause skin and eye irritation, respiratory irritation, or other health hazards if handled improperly. Workers should understand the hazards of each product before use and follow established safe handling procedures.
This toolbox talk reviews the chemical hazards associated with concrete additives and the precautions needed to safely store, handle, and use these materials.
Why This Matters
- Concrete additives may contain hazardous chemicals that require special handling.
- Proper use of personal protective equipment (PPE) helps prevent chemical exposure.
- Reviewing the Safety Data Sheet (SDS) provides important health, handling, and emergency information.
- Proper storage and labeling reduce the risk of chemical reactions, spills, and misuse.
- Prompt spill response helps protect workers and the environment.
Common Hazards
- Skin irritation or chemical burns from direct contact.
- Eye injuries caused by splashes during mixing or dispensing.
- Respiratory irritation from vapors, mists, or aerosols generated during handling.
- Improper mixing of incompatible chemical products.
- Chemical spills creating slip hazards or environmental contamination.
- Using unlabeled or improperly labeled containers.
- Leaks from damaged storage containers or dispensing equipment.
- Failure to understand product-specific hazards before use.
Safety Checklist
Before Using Concrete Additives
- Review the Safety Data Sheet (SDS) and container label for each product.
- Verify all containers are properly labeled and in good condition.
- Wear the required PPE, including chemical-resistant gloves, safety glasses or goggles, protective clothing, and respiratory protection when required.
- Inspect pumps, hoses, valves, and dispensing equipment for leaks or damage.
- Ensure adequate ventilation when handling products that may release vapors or mists.
- Keep spill response materials readily available.
During Use
- Handle additives according to the manufacturer's instructions and company procedures.
- Avoid direct skin and eye contact with chemical products.
- Never mix chemicals unless specifically instructed by approved procedures.
- Clean up spills promptly using approved spill response procedures.
- Close and secure containers immediately after use.
- Wash hands thoroughly before eating, drinking, smoking, or leaving the work area.
Crew Talking Points
- What concrete additives will be used today, and what hazards do they present?
- Where are the Safety Data Sheets (SDSs) located?
- What PPE is required when handling these products?
- What should you do if a spill or chemical exposure occurs?
- How should incompatible chemicals be stored and handled?
- Speak up immediately if you notice leaking containers, missing labels, damaged dispensing equipment, or unsafe chemical handling practices.
Stop Work If
- A chemical container is leaking, damaged, or improperly labeled.
- The required Safety Data Sheet (SDS) is unavailable.
- Required PPE or spill response materials are unavailable.
- Workers do not understand the hazards or safe handling procedures.
- Incompatible chemicals may be mixed or stored together improperly.
- You are unsure how to safely handle or use the concrete additive.
Final Reminder
Concrete additives improve concrete performance, but they must be handled with the same care as any other hazardous chemical. Review the SDS before use, wear the required PPE, inspect dispensing equipment, prevent spills, and follow approved handling and storage procedures. If you are unsure about a product or its hazards, stop work and ask for guidance before proceeding.
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