مشخصات مقاله:
عنوان فارسی مقاله:
ژئوسنتتیک ساختمان و مصالح ساخت با فعالسازی قلیایی روباره آهنگدازی دان شده
عنوان انگلیسی مقاله:
Geosynthesis of building and construction materials through alkaline activation of granulated blast furnace slag
کلمات کلیدی مقاله:
ژئوپلیمرها، سرباره کوره بلند، آجر روبرو، آجر منسوری جامد، مقاومت فشاری بدون محدودیت، فعال کننده قلیایی
مناسب برای رشته های دانشگاهی زیر:
مهندسی عمران
مناسب برای گرایش های دانشگاهی زیر:
سازه
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Abstract
Keywords
1. Introduction
2. Materials and methods
2.1. Materials
2.2. Experimental procedure
2.3. Preparation of the geopolymer paste
2.4. Unconfined compressive strength testing
2.5. Equipment
2.6. Open porosity and absorption rate
2.7. Toxicity characteristic leaching procedure (TCLP)
3. Results and discussion
3.1. Effect of alkalis concentration on UCS
3.2. The effect of alkaline activator concentration in the mineralogy
3.3. Effect of variation of alkaline concentrations on the morphology structure
3.4. Effect of liquid-solid (L/S) ratio on UCS
3.5. Effect of curing temperature on UCS
3.6. XRD analysis of geopolymer samples cured at different temperatures
3.7. SEM analysis of samples cured at different temperatures
3.8. Variation in UCS with wet and dry cycles
3.9. The effect of a 30 days soak on the UCS, absorption rate and open porosity
3.10. Tclp
4. Conclusion
CRediT authorship contribution statement
Declaration of Competing Interest
References
قسمتی از مقاله انگلیسی:
1. Introduction
The rapid growth in steel industry has resulted in the generation of large quantities of Granulated Blast Furnace Slag (GBFS) which cause environmental issues during waste management. Dumping of industrial waste has become tough and costly because of the increasing strict environmental rules and regulations and, shortages of appropriate neighbouring dumping sites. Currently there is an upsurge of interest to develop novel, yet environmentally safe, applications for the use of such material in building and construction. One of the novel technologies that has utilization potential of GBFS is through production of geopolymer material such as low cost facing and solid mansory brick that can be used in building and construction. Ordinary Portland cement (OPC) and clay has been the main material (binder) used to produce conventional bricks for the past years [1]. The production of OPC and clay fired bricks presents so many problems. Globally, it is estimated that by 2020 the cement industries would release about 4.8 billion tons of harmful CO2 gas [2]. Manufacturing of OPC and clay fired bricks emits enormous amounts CO2 and NOx responsible for global warming and their production processes are also energy intensive [3]. For a country like South Africa facing severe energy crisis, causing power cuts; this puts more strain on the energy grid [4]. In addition South Africa is responsible for nearly half the CO2 emissions for the entire continent of Africa [5]. It has also been reported that there is a shortage of clay globally and a call to preserve clay resources [6]. To address the aforementioned problems there is a need to find a viable, low cost, alternative binders to use in production of conventional bricks. One potential solution to this problem is geopolymerisation of industrial waste such as; Fly ash, mine tailings, foundry sand, basic oxygen furnace slag and granulated furnace slag as alternatives to OPC and clay resources [1–7]. Less than 6% of GBFS is used as supplementary cementitious material in South Africa [8]. However, it is reported that the waste from South African iron production companies is between 12 and 37 million tons [9]. It is therefore imperative to beneficiate GBFS in order to make it a natural resource for other valuable products, such as production of geopolymer bricks.