کاربرد باكتري كپسوله شده پرليت براي بتن خود ترمیم شونده
ترجمه نشده

کاربرد باكتري كپسوله شده پرليت براي بتن خود ترمیم شونده

عنوان فارسی مقاله: کاربرد باكتري كپسوله شده پرليت توسعه یافته و محيط کشت براي بتن خود ترمیم شونده
عنوان انگلیسی مقاله: Application of expanded perlite encapsulated bacteria and growth media for self-healing concrete
مجله/کنفرانس: ساخت و ساز و مصالح ساختمانی - Construction and Building Materials
رشته های تحصیلی مرتبط: مهندسی عمران
گرایش های تحصیلی مرتبط: مدیریت ساخت، سازه، خاک و پی
کلمات کلیدی فارسی: ترک، جذب آب، خود ترمیم شونده، باکتری، بتن
کلمات کلیدی انگلیسی: Crack، Water absorption، Self-healing، Bacteria، Concrete
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
نمایه: Scopus - Master Journal List - JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.conbuildmat.2017.11.086
دانشگاه: BRE Centre for Innovative Construction Materials, University of Bath, UK
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2018
ایمپکت فاکتور: 4/686 در سال 2018
شاخص H_index: 129 در سال 2019
شاخص SJR: 1/522 در سال 2018
شناسه ISSN: 0950-0618
شاخص Quartile (چارک): Q1 در سال 2018
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 10
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
کد محصول: E11415
فهرست انگلیسی مطالب

Abstract


1- Introduction


2- Materials and methods


3- Results


4- Discussion


5- Conclusions


References

نمونه متن انگلیسی مقاله

Abstract


Self-healing concrete based on calcium carbonate precipitation induced through bacterial activity has been investigated in recent years by teams around the world. For the first time, optimisation of the self-healing performance was considered in terms of the number of bacterial spores required, the concentration and composition of nutrients and precursors, and whether a two-component system was likely to efficiently produce self-healing in concrete. This information is required if efficient and cost-effective self-healing systems based on bacterial activity are to be implemented. For this research, coated expanded perlite was used to immobilise bacterial spores and encapsulate nutrients as two separate components for self-healing concrete. Self-healing capacity was evaluated by imaging and by initial surface absorption of water. The results indicated that healing could be achieved when coated expanded perlite containing self-healing agents was used as a 20% replacement of fine aggregate and if a suitable ratio of spores to calcium acetate was provided. This research is the first to show that self-healing is not simply a requirement of having sufficient healing compounds (e.g. calcium acetate) but that a minimal number of bacterial spores are also required to ensure that sufficient cells take part in the healing process.


Introduction


The effect of some water-borne ions (e.g. chlorides) on the durability of reinforced concrete is well documented, and cracked concrete has been shown to be more susceptible to permeation of these deleterious ions. Consequently, research is being undertaken in an attempt to develop concrete that can self-heal cracks; potentially reducing repair and maintenance costs on key infrastructure [1–3]. One approach to autonomic self-healing is the utilization of microbiologically induced calcite precipitation (MICP). This approach utilises the metabolic activity of bacteria and biomineral precursors embedded within the concrete to form an inorganic compound as a healing material. This is usually calcium carbonate, typically in the form of calcite but sometimes as vaterite [4,5]. This healing material can precipitate in small cracks soon after they form and it has the potential to limit the permeation of water and dissolved ions. Thereby the life of concrete structures can be extended without the need for manual intervention; which can be both costly and dangerous, particularly for structures with poor access. While there have been a number of studies into the feasibility of using MICP for self-healing in concrete, there have not been studies on optimising the self-healing performance through consideration of the number of bacterial spores required, the concentration and composition of nutrients and precursors or whether a twocomponent system is likely to efficiently produce self-healing in concrete.

  • اشتراک گذاری در

دیدگاه خود را بنویسید:

تاکنون دیدگاهی برای این نوشته ارسال نشده است

کاربرد باكتري كپسوله شده پرليت براي بتن خود ترمیم شونده
نوشته های مرتبط
مقالات جدید
نماد اعتماد الکترونیکی
پیوندها