Basic information
Name :
Aya Hanfay Reda Hanfy Mohamed
Title:
Lecturer
Personal Info:
Aya Hanfy Reda
was born on 02/09/1989
Bsc.of Science,Ain Shams University.
Education
Certificate
Major
University
Year
PhD
...
Ain Shams University - Faculty of Science
2020
Masters
Chemistry
Ain Shams University
2016
Bachelor
Chemistry & Physics
Ain Shams - Egypt
2011
Teaching Experience
Name of Organization
Position
From Date
To Date
future university in egypt
assisstant lecture
01/01/2013
01/01/2017
Researches /Publications
A new method to create one-part non-Portland cement powder - 01/1
Author :
Aya Hanfay Reda Hanfy Mohamed
CoAuthors :
H. A. Abdel-Gawwad; E. E. Hekal; H. El-Didamony; F. S. Hashem
Date of Publication :
01/12/2018
Abstract :
Non-Portland cement or alkali-activated slag is regarded as non-friendly for users, due to the corrosive nature of alkaline solution. This negatively affects the mass production and commercial viability of this cement. In this work, user- and eco-friendly one-part non-Portland cement (NPC) was prepared by blending ground-granulated blast-furnace slag (GGBFS) with stable dry activator (SDA). SDA was synthesized by mixing two moles of NaOH with one mole of MgCO3 or dolomite, followed by drying and pulverizing to a fixed particle size (namely, SDA-M and SDA-D, respectively). The Mg source was chosen to prepare active magnesia with no firing. So, this process was considered as eco-friendly method for this purpose. Ordinary Portland cement (OPC) was used for comparison. The SDA-M content plays a circular role on the reduction of drying shrinkage of one-part NPC. The SDA-M has a potential impact on the compressive strength development of one-part NPC compared to SDA-D. NPC containing 12 mass% SDA-M (NPC-12) gave compressive strength values superior to those of OPC at all curing ages, suggesting that the NPC-12 can be beneficially used as an alternative to OPC as confirmed by X-ray diffraction (XRD), thermogravimetric analysis (TGA/DTG), and scanning electron microscopy (SEM).
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