A Novel Way of Using Ground Granulated Blast Furnace Slag and Steel Shaving Fibers for Production of Sustainable and Smart Rigid Pavement

سال انتشار: 1403
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 121

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شناسه ملی سند علمی:

JR_IJE-37-8_014

تاریخ نمایه سازی: 23 خرداد 1403

چکیده مقاله:

Supporting sustainable development, contributing to reducing waste that causes environmental damage, and reducing the use of natural materials are part of preserving the environment and society. This is done by highlighting the manufacture of sustainable concrete pavement of acceptable quality and according to specifications. The authors previously produced a concrete pavement mixture with optimal properties by partially replacing the Portland cement with ۵۵ wt.% of the ground granulated blast furnace slag (GGBFS) in addition to partially replacing the virgin aggregates with ۳۰ wt.% of recycled aggregate from crushed rigid pavement. The goal of this research work is to produce a self-sensing rigid pavement mixture from wastes with high mechanical properties, that is better than regular concrete and less expensive. The new novel mixture has the ability to detect earlier the damages that occur to the concrete pavement so as to obtain a longer life by periodically maintaining the pavement on time. The previous mixture was improved by adding chopped steel shaving fibers with lengths ranging from ۲۰-۶۰ mm in four different volumetric ratios. These are ۰.۷%, ۱%, ۱.۱%, and ۱.۲%. The results were compared with those of the basic mixture, and a decrease in workability and slump values were noticed. Moreover, significant improvements in the mechanical properties were obtained. The concrete's resistance to the applied loads increased by increasing the percentage of steel shaving in the mixtures, due to the increasing of cohesion forces within the mixture. The self-sensing capability for the developed mixtures was tested by measuring the changes in the electrical resistance under different types of mechanical loadings. The results showed that the direction of the applied load and the proportion of steel shavings affect the self-sensing properties in terms of the fractional variation in the electrical resistance (FVER, %), which highlights the importance of using steel shavings in producing smart concrete pavements from reused resources more efficiently and highly cost-effectiveness.

نویسندگان

L. A. A. Al-Hindawi

Civil Engineering Department, University of Technology Iraq, Baghdad, Iraq

A. M. Al-Dahawi

Civil Engineering Department, University of Technology Iraq, Baghdad, Iraq

A. S. J. Al-Zuheriy

Civil Engineering Department, University of Technology Iraq, Baghdad, Iraq

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