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Introduction
Current institution
Education
September 2013 - September 2018
Publications
Publications (30)
Over the past decades, ground granulated blast furnace slag (GGBS) has been extensively used as a replacement for cement in concrete production to mitigate cement carbon emissions. Hence, a substantial portion of the hydrated cement paste discarded at the end of a concrete’s lifespan could contain a certain quantity of GGBS. This study aims to inve...
The potential expansion risks caused by the reaction of metallic aluminum and glass particles in incineration bottom ash (IBA) in high-alkalinity environments limit its use as an aggregate in concrete applications. This study aims to develop artificial aggregates (AAs) by integrating IBA with a low-alkalinity binder comprising incineration fly ash (...
The low reactivity and volume expansion issue of steel slag limits its application as alternative to cement. Studies demonstrated that aqueous carbonation (AC) can enhance the cementitious properties of finely sized steel slag as a cementitious supplementary material (SCM). However, the impact of particle size on the CO2 uptake capacity and its ass...
Recycled concrete fines (RCF) are by-product of waste concrete recycling, and are commonly disposed in landfills. With global warming and natural resource depletion, it is imperative to identify novel upcycling technology to turn RCF into value-added products. This research proposes a two-step process to produce vaterite CaCO3 (rare earth carbonate...
Accelerated carbonation of industrial by-products such as yellow phosphorus slag (YPS) and basic oxygen furnace slag (BOFS) is an effective method to convert waste into valuable construction materials. Accelerated carbonation or CO2 sequestration can be conducted directly under dry or aqueous conditions. However, the slow reaction and low CO2 fixat...
Yellow phosphorus slag (YPS) is an industrial waste by-product and has pozzolanic characteristics. Due to its poor early-age reactivity, this study aims to overcome this limitation via CO2 activation of raw YPS (RYPS) and use as a cement substitute. The experimental results showed that carbonation of RYPS under optimal conditions (liquid to solid r...
Accelerated carbonation of recycled concrete fines (RCF) is one of the effective ways of improving their poor quality for sustainable reuse in the construction industry. Flue gas containing waste heat that is usually discharged into the atmosphere can be reused to enhance the gas-solid reaction of RCF carbonation. Therefore, this study investigates...
For past decades, supplementary cementitious materials (SCMs) have been widely used in the production of concrete for the purpose of reducing cement carbon footprint as well as enhancing the durability of concrete structures. Hence, most of the discarded concrete could contain a certain amount of SCM such as fly ash (FA) and ground granulated blast...
Mineral carbonation of alkali solid wastes is envisaged to be an effective method to sequester CO2 and turn the wastes into more valuable end products. Steel slag generated from the steel-making industry contains a high content of calcium oxide, which is a potential medium to sequestrate CO2 via the carbonation process. In this paper, the influence...
Managing and dredging of ultra-fine sediment (UFS) in river estuaries becomes an environmental challenge due to its threat to the ecosystem. However, upcycling of UFS for the production of self-compacting mortar (SCM) could be a step toward sustainable waste management and yield the special rheological properties that required for SCM. This paper u...
CO2 curing represents a promising way to enhance the mechanical strength of cement-based materials. Since the calcium carbonates (CaCO3) induced by CO2 curing has a higher decomposition temperature compared with most cement hydration products (such as calcium silicate hydrate (C-S-H) and calcium hydroxide (Ca(OH)2)), the performance of those carbon...
Recently, the use of accelerated carbonation curing has attracted wide attention as a promising method to reduce carbon dioxide (CO2) emission and improve the mechanical properties of cement-based materials. However, the diffusion mechanism of CO2 in the matrix and the content of hydration products are the key factors that restrict the carbonation...
The aim of this paper is to investigate the effect of carbonation on the microhardness and mechanical-related properties of carbonated and uncarbonated layers of cement pastes. The microhardness and mechanical property changes were examined 1 day after demolding and then 3, 7, 14, and 28 days with further CO2 and water curing. CO2 treatment yielded...
This paper studies the role of CO2 treatment and the impact of particle size (<75 μm and 75-150 μm) of waste cement powder (WCP) with different cement replacement content (0%, 5%, 10%, 15%, 20%, and 30%) on the physical properties and microstructure of blended cement paste. The results show that carbonation of WCP can effectively increase the flowa...
In this study, a statistical experimental design based on response surface methodology (RSM) has been applied to predict and optimize the compressive strength of alkali-activated phosphorus slag in different ages (3, 7, and 28 days). For this purpose, the binder samples were prepared with different molar ratios of SiO2/Na2O (S/N), Na2O/Al2O3 (Na/Al...
The present study aimed to determine the rheological behavior of activated phosphorus slag (AAPS) with a combination of Ca(OH)2 and Na2CO3 (CNC activator) or Na2SO4 (CNS activator) compared to OPC paste. The findings showed that the rheology of AAPS pastes fit with the Herschel-Bulkley model and behaved like a shear-thinning fluid. The AAPS pastes...
This paper focused on determining the rheological behavior and apparent activation energy of activated phosphorous slag (AAPS) with sodium silicate and NaOH at different SiO2/Na2O (S/N) and Na2O/Al2O3 (N/A) molar ratios. The results showed that the AAPS paste behaved like a shear-thinning fluid, its rheological behavior obeyed the Herschel-Bulkley...
In situ attenuated total-reflectance Fourier transform infrared (ATR-FTIR) spectroscopy was used to investigate the gel formation of a natural pozzolan-based geopolymer and its relation to mechanical strength. For this purpose, geopolymer samples were prepared with different concentrations of SiO2/Na2O (Si/Na) and Na2O/Al2O3 (Na/Al) molar ratios in...
Cement production is an energy-intensive process, so that the cement industry occupies a top position among other energy-consuming industries. Among the equipment used in cement industries, boilers are one of the energy-consuming equipment. Boilers are among the common heating equipment in industrial, commercial, and institutional facilities. In th...
