Executive Summary

Context: Nepal’s cement sector sits at the intersection of three structural pressures: high and rising carbon emissions, deep dependence on imported coal and supplementary cementitious materials, and finite domestic limestone reserves. Despite achieving clinker self-sufficiency, the sector imports over one million tons of coal annually and relies almost entirely on India for the fly ash and blast furnace slag that enable blended cement production.

Opportunity: Limestone Calcined Clay Cement (LC3) presents a technically validated and economically attractive pathway to address all three pressures simultaneously. By replacing up to 50 percent of clinker with calcined clay and limestone, LC3 can reduce cement-related carbon emissions by 30–40 percent, cut coal consumption by approximately 36 percent per ton of cement, and reduce dependence on imported SCMs — while delivering raw material cost savings of up to NPR 2,500 per ton of cement produced.

Constraints: Three interrelated constraints shape the transition: (1) residual uncertainty around the mineralogical quality and commercial viability of domestic clay resources; (2) the absence of a Nepal Standard for LC3, which is the single most binding barrier to adoption; and (3) differential firm-level incentives that create a misalignment between who has the strongest motivation to adopt and who has the capacity to drive regulatory change.

Conclusion: The transition to LC3 is not constrained by capital intensity or technological barriers — payback periods for required investments range from one to three years under moderate utilization. What is missing is institutional alignment. A narrow window of opportunity is open, shaped by improving geological data, India’s adoption of an LC3 standard in 2023, and rising cost pressures across the sector. The priority action is clear: initiate LC3 standards development through NBSM without delay.