Calcium Waste Wall Putty

Turning Industrial Waste into Sustainable Building Materials Pleased to share our work on cement-free wall putty developed using industrial calcium by-product waste—a small but meaningful step towards decarbonising the construction sector. Every year, large quantities of calcium-based industrial waste are dumped in open land or landfills, affecting soil fertility due to high alkalinity. Our approach converts this low-value waste into a functional wall finishing material, without using white cement. Key highlights Cement content: 0% (lower carbon footprint) Replacement of natural dolomite: ~65–73% Whiteness index: 76–81% Comparable performance to commercial wall putty Raw material cost: ~₹7.3–7.6 per kg TRL: 6 This work aligns with the principles of Waste-to-Wealth, Circular Economy, and Aatmanirbhar Bharat, while offering an affordable solution for wall finishing, particularly suited for rural and low-cost housing. Looking forward to collaborations with industry, policymakers, and sustainability-focused stakeholders to take this forward from lab to field. CSIR-CBRI congratulates Dr Sandeep Gupta and their team at Building Materials and Environmental Sustainability (BMES) for this innovative technology. #SustainableConstruction #CircularEconomy #WasteToWealth #GreenMaterials #Decarbonisation #ConstructionInnovation #AtmanirbharBharat #LowCarbonMaterials