Hydration and Engineering Properties of Mechanically-Activated Composite Cement from Processed Steel Slag and Limestone
عنوان مقاله: Hydration and Engineering Properties of Mechanically-Activated Composite Cement from Processed Steel Slag and Limestone
شناسه ملی مقاله: JR_IJMSEI-19-1_002
منتشر شده در در سال 1400
شناسه ملی مقاله: JR_IJMSEI-19-1_002
منتشر شده در در سال 1400
مشخصات نویسندگان مقاله:
Mojtaba Hosseini - Department of Chemistry,Firoozabad Branch, Islamic Azad University,Firoozabad,Fars
Ali Allahverdi - School of Chemical EngineeringIran University of Science and Technology (IUST)Narmak ۱۶۸۴۶ - ۱۳۱۱۴Tehran, IRAN
Mohammad Jaafar Soltanian fard - Department Of Chemistry,Firoozabad Branch,Islamic Azad University,Fars, Iran
خلاصه مقاله:
Mojtaba Hosseini - Department of Chemistry,Firoozabad Branch, Islamic Azad University,Firoozabad,Fars
Ali Allahverdi - School of Chemical EngineeringIran University of Science and Technology (IUST)Narmak ۱۶۸۴۶ - ۱۳۱۱۴Tehran, IRAN
Mohammad Jaafar Soltanian fard - Department Of Chemistry,Firoozabad Branch,Islamic Azad University,Fars, Iran
The aim of the present research work is to evaluate the feasibility of processing and utilizing steel slag
in binary and ternary cement blends with limestone. The physical and microstructural properties of binary and
ternary composite cements produced by inter-grinding mixtures of ordinary Portland cement clinker, processed
steel slag and limestone in a laboratory ball mill with replacement levels varying from ۰ wt.% to ۳۰ wt.% were
studied. The effects of processed steel slag and limestone incorporation on density of dry cement mixes and water
consistency, setting time and volume stability of fresh and hardened cement pastes were investigated. Also,
density, water absorption, total open pore volume (%) and compressive strength of cement mortars were measured.
The mix with ۱۵ wt.% limestone and ۱۵ wt.% processed steel slag was selected as a typical ternary cement mix
for complementary studies including X-ray diffractometry, thermal gravimetry, Fourier-transform infrared
spectroscopy, and scanning electron microscopy analyses. The results show that removal of relatively high
metallic content of steel slag increases its grindability for mechanical activation and improves its hydraulic
properties effectively and makes it suitable for being recycled in cement industry. The results show that
mechanical activation of the cement mixes enhances the poor hydraulic activity of the processed steel slag and
compensates the strength loss to some extent. The physical and chemical properties of all studied composite
cement mixes comply with ASTM standard specifications, except the compressive strength of the cement mixes
at ۲۸-days containing ۲۰ wt.% or higher amounts of limestone ground to the relatively low Blaine specific surface
area of about ۳۰۰۰ cm۲/g.
کلمات کلیدی: Ternary composite cement, Processed steel slag, Limestone, Mechanical activation
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1598540/