[ PAPER ID: 79013 ] CARBON-NEUTRAL CONCRETE MIXES: EXPERIMENTAL EVALUATION OF CONCRETE INCORPORATING INDUSTRIAL BY-PRODUCTS TO ACHIEVE NEAR-ZERO EMBODIED CARBON

Authors

  • Gautam Bondyopadhyay Retd. Professor of Civil Engineering, Mentor, Author. & Independent Researcher, Kolkata, India.

Abstract

This study presents the design, production, testing and life-cycle assessment of a locally-produced carbon-neutral concrete (CNC) mix for use in infrastructure in the Kolkata metropolitan region (West Bengal, India). The mix replaces a portion of Ordinary Portland Cement (OPC) with industrial by-products (fly-ash, ground granulated blast-furnace slag, calcined clay) as partial cement replacement in M35 grade concrete and incorporates CO₂ mineralisation technology. A full cost–strength–CO₂ emissions sensitivity analysis is carried out for a typical 1,000 m³ volume. Results show a reduction of embodied CO₂ by ~X % relative to a conventional M30 mix, with comparable 28-day compressive strength of ~Y MPa, and cost impact of only +/- Z %. The study also includes durability testing (water absorption, chlorideingress), and presents implementation recommendations for local concrete producers and infrastructure owners. The outcomes support the transition to low-carbon infrastructure in India.

Keywords:

Carbon-Neutral Concrete, GGBS, Embodied Carbon, Sustainability, Life-Cycle Assessment, Cost–Strength Trade-Off, Kolkata, M35 Concrete, Industrial By Products, Low-Carbon Infrastructure

Author Biography

Gautam Bondyopadhyay, Retd. Professor of Civil Engineering, Mentor, Author. & Independent Researcher, Kolkata, India.

 

 

Downloads