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عنوان فارسی مقاله: بررسی تأثیر مجموعه رسی منبسط و بخار سیلیکا بر خواص بتن سبک وزن
عنوان انگلیسی مقاله: Investigate the influence of expanded clay aggregate and silica fume on the properties of lightweight concrete
مجله/کنفرانس: مصالح ساختمانی و ساخت و ساز – Construction and Building Materials
رشته های تحصیلی مرتبط: مهندسی عمران
گرایش های تحصیلی مرتبط: سازه
کلمات کلیدی فارسی: بتن اسفنجی، مجموعه رسی منبسط، تخلخل، جذب پذیری، هدایت حرارتی
کلمات کلیدی انگلیسی: Foamed concrete، Expanded clay aggregate، Porosity، Sorptivity، Thermal conductivity
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
نمایه: Scopus – Master Journals List – JCR
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.conbuildmat.2019.05.171
دانشگاه: State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2019
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: 14
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
آیا این مقاله مدل مفهومی دارد: ندارد
آیا این مقاله پرسشنامه دارد: ندارد
آیا این مقاله متغیر دارد: ندارد
کد محصول: E12391
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست انگلیسی مطالب

Abstract


1-Introduction


2-Materials and methods


3-Results and discussion


4-Conclusions


Declaration of Competing Interest


Acknowledgment


References

نمونه متن انگلیسی مقاله

Abstract


This study concentrated on the formulation of self-flowing and an energy efficient lightweight aggregate foamed concrete (LAFC) to be employed as thermal insulation, thermal mass and structural material. Low density concrete mixtures (for the density values from 800 to 1300 kg/m3 ) were prepared by changing the volume of lightweight expanded clay aggregate (ECA) from 49.4% to 20.1%. Flowing properties of concrete mixtures were improved with the help of stable foam. Ordinary Portland cement (OPC) was replaced by the 5% and 10% silica fume (SF) to examine the influence of SF on the properties of LAFC. Compressive strength and tensile strength of LAFC mixtures were respectively enhanced from 6.5 MPa to 24.30 MPa and 0.52 MPa to 1.63 MPa by reducing the volume of ECA from 49.4% to 20.1%. LAFC mixture (800-0SF) with the lowest density exhibited highest porosity and sorption coefficient value of 70.63% and 2.56 kg m2 min0.5. Thermal conductivity, volumetric specific heat capacity and thermal diffusivity of LAFC mixtures were in the range of 0.23–۰٫۴۵ W m1 K1 , 1136–۱۶۳۱ kJ/m3 .K and 0.20–۰٫۲۷۵ mm2 /s respectively. SEM analysis revealed that reduction in the volume of ECA and addition of SF densified the microstructure of LAFC. Finally, LAFC mixtures were classified into Class-I, Class-II and Class-III grade concretes for the structure and insulation purposes as per functional classification of RILEM.


Introduction


Due to the scarcity of available energy resources, a lot of researches are being conducted on the usage of energy saving and energy efficient materials, and some countries have included the use of these materials in their fundamental policy to conserve the natural resources. In China, construction industry nearly consumes 35% of total energy [1]. In the modern day, construction industry is rapidly growing industry because of the peak demands of contemporary infrastructure. In such cases, environmental stability and energy efficiency of buildings can be increased through the improvement in thermal properties of construction materials. A lot of previous studies have examined the workability, mechanical, thermal and hygroscopic properties of lightweight concrete containing foam and lightweight aggregate. Lightweight concretes, foamed concretes and aerated concretes with excellent thermal properties have been used as exterior wall materials [2–۹]. Foamed concrete belongs to the family of lightweight concrete and it is mainly composed of Portland cement (OPC), foaming agent, and aggregate. The purpose of using foaming agent is to introduce entrapped air in lightweight concrete [10].

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