Information to be Supplied by the Purchaser
It is recommended that a meeting must be held between the purchaser and the producer of concrete. In the meeting the following points should be discussed.
- Details of concrete mix
- Use of concrete
- Type of structure
- Performance requirement
- Notice to be given prior to delivery
- Delivery rate
- Purchaser’s authorized representative
- On site testing
- Training (if required)
The details about the concrete mix should be supplied in a format as shown below.
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CONCRETE MIX INFORMATION TO BE SUPPLIED BY THE PURCHASER |
|
| Name of the contractor | |
| Site name | |
| Reference standard of concrete mix design | |
| Grade (N/mm2) (Characteristic strength) | |
| Minimum Cement Content (kg/m3) | |
| Mineral Additives (Pulverized fuel ash / Slag / Others) kg/m3 | |
| Maximum Free Water-Cement Ratio | |
| Nominal Maximum Aggregate Size | |
| Cement Type and Grade (if preferred) | |
| Target Workability (Slump in mm) | |
| Target Workability at Site | |
| Maximum Temperature of Concrete at the Time of Placing | |
| Class of Sulphate Resistance (if applicable) | |
| Exposure Condition (if applicable) | |
| Class of Finish (if applicable) | |
| Mix application | |
| Method of Placing | |
| Any other Requirements (Early strength, workability retention, permeability testing, chloride content restriction, maximum cement content, etc) | |
| Concrete Testing (Frequency) | |
| Material’s Testing (any non-routine requirements) | |
| Alternatives to be offered: Yes / No | |
| Method of Curing to be Used by Contractor | |
| Quantity (m3) | |