Customer Guidance on Concrete

Concrete Design and Preparation

The following items need to be considered when preparing concrete design:

• Strength requirements
• Durability requirements
• Aesthetic requirements
• Maximum aggregate diameter
• Method of placement
• Placing rate
• Concrete consistence
• General boundary conditions
• Delivery method and time
• Curing/waiting time
• Definition of test requirements
• Mix design and specification
• Preliminary testing
• Mix design adjustment if necessary

Placement of Concrete

Concrete is placed within a limited and defined period.  The following factors contribute to the success of this operation, which is critical to concrete quality:

• Checking of Delivery Docket
• Using the correct equipment
• Avoid over handling of concrete
• Continuous placing and compacting
• Re-compaction on large pours
• Take the appropriate measures during interruptions
• Carry out the necessary finishing

Curing of Concrete

Appropriate curing is essential to achieve consistent quality.  The following measures are required to achieve this:

• Protect from adverse climate conditions – direct sun, wind, rain, frost
• Prevent vibration after finishing
• Use a curing agent
• Cover with sheets or frost blankets
• Keep damp
• Maintain the curing time relevant to the temperature

Download Documents

Keohane Readymix Customer Guidance on Concrete

ICF Guidelines for Cold Weather

ICF Guidelines for Hot Weather