Carbon Footprint Assessment of Cementitious Materials Prepared from Industrial By-Product Gypsum Based on Life Cycle

Abstract

Abstract: Under the new situation of “Two Mountains” theory and “Dual Carbon” goals, our country has issued a series of policies and preferential conditions to encourage the preparation of gypsum cementitious materials from industrial by-product gypsum, including calcined gypsum, α high-strength gypsum, mixed phase gypsum, et al. So far, there are few carbon footprint calculation reports on gypsum cementitious materials in China. In this paper, the carbon footprint calculation model of gypsum cementitious materials prepared from industrial by-product gypsum was established based on life cycle assessment method, which was demonstrated through the production of α high-strength gypsum from phosphogypsum. The results show that the carbon footprint in three stages of raw material acquisition, production and transportation of α high-strength gypsum product is 3.95, 288.04 and 14.31 kg CO₂ eq/t, respectively, and the total emission is 306.3 kg CO₂ eq/t. The carbon emission in production stage is the largest, which is an important segment to reduce energy consumption, reduce carbon emission and save costs. The carbon footprint calculation model established in this paper is applicable to the carbon footprint calculation for calcined gypsum, α high-strength gypsum, anhydrite, mixed phase gypsum, et al.

Key words: industrial by-product gypsum, gypsum cementitious material, α high-strength gypsum, life cycle assessment, carbon footprint

CLC Number:

TQ177.3

LI Ying, DUAN Pengxuan, NI Wen, ZHANG Dajiang. Carbon Footprint Assessment of Cementitious Materials Prepared from Industrial By-Product Gypsum Based on Life Cycle[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(6): 1921-1930.

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