Table 5DBPenalty for 28-Day…

Table 5DB
Penalty for 28-Day Compressive Strength

• Increasing penalties for low compressive strength by a factor of 3.2 significantly elevates financial risk for both concrete producers and contractors.
• Such penalties incentivize the supply of concrete with strengths well above specified requirements to mitigate risk.
• Overdesigning concrete mixtures typically requires higher cementitious content, which directly increases greenhouse gas (GHG) emissions.
• This approach conflicts with the specification’s stated objective of reducing GWP and promoting sustainable construction practices.
• The increased penalties shift the focus from performance-based compliance to risk avoidance, rather than optimizing material efficiency.
• It may also discourage innovation in mix design, particularly the use of lower-carbon materials and optimized SCM contents.
• Overall, the significant escalation in penalties introduces disproportionate risk without clear evidence of corresponding improvements in quality or performance.