以再生骨料和铜渣作为细骨料的地质聚合物混凝土的热性能和力学性能

Thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate.

作者信息

Sahu Anasuya, Kumar Pramod, Pratap Bheem, Gogineni Abhilash, Sembeta Regasa Yadeta

机构信息

Department of Civil Engineering, Institute of Technology, Nirma University, Ahmedabad, 382481, Gujarat, India.

Department of Civil Engineering, Mohan Babu University (SVEC), Tirupati, 517102, India.

出版信息

Sci Rep. 2025 Aug 7;15(1):28968. doi: 10.1038/s41598-025-15153-y.

DOI:10.1038/s41598-025-15153-y

PMID:40775441

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12332148/

Abstract

This study investigates the thermal and mechanical performance of geopolymer concrete incorporating recycled coarse aggregate (RCA) and copper slag (CS) as sustainable alternatives to natural aggregates. The geopolymer binder comprises fly ash (FA) and ground granulated blast furnace slag (GGBS), activated by a 12 M NaOH solution. RCA replaced 30% of natural coarse aggregate to form recycled aggregate concrete (RAC), while CS replaced natural fine aggregate in 20% increments up to 100% in RCA based geopolymer concrete to study its effect on compressive, split-tensile, and flexural strengths at ambient (27 °C) and elevated temperatures (100 °C, 300 °C, 500 °C, 700 °C). The experimental findings revealed that integrating CS improved both mechanical and residual thermal properties of RCA-based geopolymer concrete up to 45% and 41%, respectively, over the control mix. The optimal mix exhibited maximum mechanical performance with 30% RCA and 40% CS. This contributes to enhanced fire resistance, sustainability, and reduced dependency on natural resources.

摘要

本研究调查了掺入再生粗骨料（RCA）和铜渣（CS）作为天然骨料可持续替代品的地质聚合物混凝土的热性能和力学性能。地质聚合物粘结剂由粉煤灰（FA）和磨细粒化高炉矿渣（GGBS）组成，由12M NaOH溶液激发。RCA取代了30%的天然粗骨料以形成再生骨料混凝土（RAC），而在基于RCA的地质聚合物混凝土中，CS以20%的增量取代天然细骨料，最高可达100%，以研究其在环境温度（27°C）和高温（100°C、300°C、500°C、700°C）下对抗压强度、劈裂抗拉强度和抗弯强度的影响。实验结果表明，与对照混合料相比，掺入CS分别将基于RCA的地质聚合物混凝土的力学性能和残余热性能提高了45%和41%。最佳混合料在RCA为30%和CS为40%时表现出最大的力学性能。这有助于提高耐火性、可持续性并减少对自然资源的依赖。