Monday, 10 April 2017 13:04

Physico-mechanical properties of eco-friendly alkali activated industrial solid wastes and ordinary Portland cement pastes

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Physico-mechanical properties of eco-friendly alkali activated industrial solid wastes and ordinary Portland cement pastes
S. A. Abo-El-Eneina, H. A. Abdel Gawwad*b, M. Khalifac, M. I. El-Gammald, Talaat. A. Hegazyd
aChemistry Department, Faculty of Science, Ain Shams University bRaw Building Materials Research Institute, Housing and Building National Research Center cDirector of Hazardous Materials Management, Ministry of Environment – cabinet of ministries dEnvironment sciences Department, Faculty of Science, Dumyat University
*E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
The aim of this work is to evaluate the physico-mechanical properties of alkali activated industrial solid wastes and ordinary Portland cement pastes. Ground granulated blast-furnace slag (GGBFS), ceramic waste (CW) and glass waste (GW) as industrial solid wastes were used in this investigation. These wastes were activated by alkaline solution to produce binding materials, which may be used as alternative to ordinary Portland cement (OPC). Alkali activated-GGBFS, GGBFS-CW and GW pastes have been prepared. Compressive strength and drying shrinkage were carried out, in order for the hardened pastes of OPC and alkali activated industrial solid wastes. The microstructure and phase composition of hydration products formed in alkali activated industrial solid wastes and hydrated OPC were investigated using scanning electron microscopy (SEM), Fourier transformer infrared (FTIR) spectroscopy and x-ray diffraction (XRD) analyses. The results showed that the alkali activated-GW and alkali activated-GGBFS presented the highest compressive strength and drying shrinkage values. The replacement of GGBFS by CW led to enhance compressive strength and reduce drying shrinkage, making the alkali activated GGBFS/CW beneficially used as alternative to OPC.

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