Environmental Benefit Assessment of Blended Cement with Modified Granulated Copper Slag

Abstract

This study aimed to investigate the environmental impact of modified granulated copper slag (MGCS) utilization in blended cement production at a representative cement plant in China. Sensitivity analysis was performed on the substance inputs, and the life cycle impact assessment (LCIA) model was applied. A detailed comparative analysis was conducted of the environmental impact of cement production in other studies, and ordinary Portland cement production at the same cement plant. Results showed that calcination has the largest contribution impact of all the impact categories, especially in causing global warming (93.67%), which was the most prominent impact category. The life cycle assessment (LCA) result of blended cement was sensitive to the chosen LCIA model and the depletion of limestone and energy. In this study, producing blended cement with MGCS effectively mitigated the environmental impact for all the selected impact categories. Results also show a reduction in abiotic depletion (46.50%) and a slight growth (6.52%) in human toxicity. The adoption of MGCS in blended cement would therefore generally decrease the comprehensive environmental impact of cement, which contributes to the development of sustainable building materials.

Application of Sulfur-2,4-dinitrophenylhydrazine as Modifier for Producing an Advantageous Concrete

“…Each cycle was four hours apart and conducted over a temperature range of 4°C to -18°C, repeating up to 300 times. The study concluded after 300 cycles, and consequently, the stability coefficient of the cycles was determined [47][48][49] .…”

A Review of the Influence of Copper Slag on the Properties of Cement-Based Materials

“…In CBMs, CS can be used as supplementary cementitious materials (SCMs) to reduce cement consumption, thus saving a lot of energy consumption when producing cement [ 8 , 9 ]. When CS after grinding as a kind of SCMs is added to CBMs, it delays the setting time of CBMs [ 10 , 11 , 12 , 13 ], it does not affect the working properties of CBMs [ 14 , 15 ], it improves the mechanical properties of CBMs [ 10 , 16 , 17 ], and it enhances the durability of CBMs [ 15 , 18 , 19 , 20 , 21 ].…”