Effect of Various Alkaline Activator Solutions on Compressive Strength of Fly Ash-Based Geopolymer Concrete

  • سال انتشار: 1399
  • محل انتشار: مجله مهندسی عمران و مصالح کاربردی، دوره: 4، شماره: 2
  • کد COI اختصاصی: JR_JCEMA-4-2_004
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 523
دانلود فایل این مقاله

نویسندگان

Alireza Esparham

Young Researchers and Elites club, Science and Research Branch, Islamic Azad University, Tehran, Iran.

Amir Bahador Moradikhou

Young Researchers and Elites club, Science and Research Branch, Islamic Azad University, Tehran, Iran.

Mohammad Jamshidi Avanaki

School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran

چکیده

In recent years, geopolymers, as a new class of green cement binders, have been considered as an environmental-friendly alternative to Ordinary Portland Cement (OPC) which can potentially reduce negative environmental impacts of OPC effectively. In this experimental research, effects of different alkaline activator solutions and variations of associated parameters, including KOH concentration and Na2SiO3/KOH weight ratio, on the compressive strength of fly ash-based geopolymer concrete were investigated. The obtained results showed that using NaOH provided greater 3- and 7- day compressive strengths as well as faster hardening. Conversely, using KOH resulted in higher 28-day compressive strength. Additionally, simultaneous inclusion of 50% NaOH and 50% KOH resulted in decline of the compressive strength. Furthermore, the obtained results indicated that increasing the KOH concentration up to 14 M resulted in the highest compressive strength, while weight ratio of 1.5 for Na2SiO3/KOH was the optimum value to achieve highest 7-and 28-day compressive strengths.

کلیدواژه ها

Geopolymers, Fly-Ash, Alkaline Activator, NaOH, KOH

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.