Concrete Sustainability Council, towards a sustainable, safe, durable and comfortable future

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Weighting and Certification Levels

The CSC certification system is applicable to the following activities: concrete plants, cement plants and aggregate quarries. The CSC Certificate for a concrete plant always includes the performance of the supply chain (which has a weight of 40% of the total score). The CSC Suppliers Certificate for cement and aggregate takes into account the performance of the respective plant and will be used in providing the needed supply chain evidence to the CSC Certificate for concrete.

weighting of different activities

Figure 1: Schematic description of the weighting of different activities.

 

Weighting of different categories

The four main categories (management, environment, social topics and economic topics) do not have an equal weight and are not the same for concrete, cement and aggregate certification. An overview of the available points by category and activity is given in the following table.

Calculation & weighting                       Credits                                                                    Exemplary Performance

  RMX CEM AGG RMX CEM AGG
M - management 32 32 28 0 0 0
E - environment  59 133 74 2 1 1
S - social topics  45 44 36 1 1 1
B - Economic      25 25 25 0 0 0
Total 161 234 163 3 2 2
  100% 100% 100% 2% 1% 1%

 

Overall score for a concrete plant

The overall score for a concrete plant depends 60 percent on the score for its own operations; the other 40 percent depend on the scores of its cement (25%) and aggregate (15%) suppliers, see also Figure 1. Consequently, the overall score is calculated from the partial score for its own operations and the scores of its suppliers in the following way:

Score(overall) = 60% * score(concrete)[%age] + 25% * score(cement)[%age] + 15% * score(aggregate)[%age]

Where score(cement) and score(aggregate) are the average scores (weighted by mass) of the cement and aggregate suppliers, respectively.

Pie diagram

 

Certification levels for concrete plants and suppliers

The CSC has the following certification levels: Bronze,Silver, Gold and Platinum.
The following minimum score needs to be achieved:

Concrete

Bronze 35%
Silver 50%
Gold 65%
[Platinum 80%]*)

 

Cement

Bronze 60%
Silver 80%
Gold 95%
[Platinum 98%]*)

 

Aggregates

Bronze 50%
Silver 70%
Gold 85%
[Platinum 95%]*)

*) the Platinum level will be made achievable at a later point in time.


Furthermore, the following additional requirements need to be fulfilled:

  • The plant has to comply with all prerequisites.
  • The plant has to score the points in the mandatory criteria for the corresponding level. The table "2.1 List of Prerequisite Criteria for Silver, Gold, Platinum" summarizes the information in the description of all criteria regarding whether they are mandatory for a certain level; in the case of a discrepancy between the table and the discription in each criterion the latter will prevail.
  • For all certification levels of Silver the partial score of the concrete plant has to be at least 60% (=> 36% of overall score)
  • For all certification levels of Gold and above the partial score of the concrete plant has to be at least 80% (=> 48% of overall score)

Suppliers who have not achieved the minimum score for the Bronze level but who comply with the mandatory prerequisites contribute to the final score of their clients with their score but do not receive a certificate.