文章基本信息

标题：Limestone calcined clay cement as a low-carbon solution to meet expanding cement demand in emerging economies
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作者：Yudiesky Cancio Díaz ; Yudiesky Cancio Díaz ; Sofia Sánchez Berriel 等
期刊名称：Development Engineering
印刷版ISSN：2352-7285
电子版ISSN：2352-7285
出版年度：2017
卷号：2
页码：82-91
DOI：10.1016/j.deveng.2017.06.001
语种：English
出版社：Elsevier
摘要：AbstractThis paper aims at assessing the return on investment and carbon mitigation potentials of five investment alternatives for the Cuban cement industry in a long-term horizon appraisal (15 years). Anticipated growing demand for cement, constrained supply and an urgent need for optimisation of limited capital while preserving the environment, are background facts leading to the present study. This research explores the beneficial contribution of a new available technology, LC3cement, resulting from the combination of clinker, calcined clay and limestone, with a capacity of replacing up to 50% of clinker in cement. Global Warming Potential (GWP) is calculated with Life Cycle Assessment method and the economic investment's payback is assessed through Return on Capital Employed (ROCE) approach. Main outcomes show that projected demand could be satisfied either by adding new cement plants—at a high environmental impact and unprofitable performance— or by introducing LC3strategy. The latter choice allows boosting both the return on investment and the production capacity while reducing greenhouse gas (GHG) emissions up to 20–23% compared to business-as-usual practice. Overall profitability for the industry is estimated to overcome BAU scenario by 8–10% points by 2025, if LC3were adopted. Increasing the production of conventional blended cements instead brings only marginal economic benefits without supporting the needed increase in production capacity. The conducted study also shows that, in spite of the extra capital cost required for the calcination of kaolinite clay, LC3drops production costs in the range of 15–25% compared to conventional solutions.
关键词：Cement;Alternative;ROCE;CO;2;LCA;Investment