- document
-
Nedeljković, Marija (author), Arbi, Kamel (author), Ye, Guang (author)The reduction of pH from ~12.5 to ~9 by carbonation of the pore solution of reinforced cementbased concrete structures results in the reinforcement corrosion. The rate of carbonation is an important input for design of the concrete cover depth and the service life prediction of reinforced concrete structures because the initiation of...conference paper 2021
- document
-
Nedeljković, Marija (author), Arbi, Kamel (author), Ye, G. (author)The reduction of pH from ~12.5 to ~9 by carbonation of the pore solution of reinforced cementbased concrete structures results in the reinforcement corrosion. The rate of carbonation is an important input for design of the concrete cover depth and the service life prediction of reinforced concrete structures because the initiation of...conference paper 2021
- document
-
Nedeljković, Marija (author), Ghiassi, Bahman (author), Ye, G. (author)Understanding the role of curing conditions on the microstructure and phase chemistry of alkali-activated materials (AAMs) is essential for the evaluation of the long-term performance as well as the optimization of the processing methods for achieving more durable AAMs-based concretes. However, this information cannot be obtained with the...journal article 2021
- document
-
Nedeljković, Marija (author), Ghiassi, B. (author), van der Laan, Sieger (author), Li, Z. (author), Ye, G. (author)The effect of curing conditions (sealed and unsealed) on the pore solution composition and carbonation resistance of different binary alkali-activated fly ash (FA) and ground granulated blast furnace slag (GBFS) pastes is investigated in this study. The studied mixtures were with FA/GBFS ratios of 100:0, 70:30; 50:50, 30:70, 0:100. Ordinary...journal article 2019
- document
-
Ye, G. (author), Lukovic, M. (author), Ghiassi, B. (author), Aldin, Zainab (author), Prinsse, Silke (author), Liu, Jonh (author), Nedeljković, Marija (author), Hordijk, D.A. (author), Lagendijk, P. (author), Bosman, A. (author), Blom, T.A. (author), van Leeuwen, M. (author), Huang, Zhekang (author), Celada, Ulric (author), Du, C. (author), van den Berg, J.A.M. (author), Thijssen, A. (author), Wijte, Simon (author)The sustainability of infrastructure projects is becoming increasingly important issue in engineering practice. This means that in the future the construction materials will be selected on the basis of the contribution they can make to reach sustainability requirements. Geopolymers are materials based on by-products from industries. By using...journal article 2019
- document
-
Zuo, Y. (author), Nedeljković, Marija (author), Ye, G. (author)The pore solutions of a series of hardened alkali-activated slag/fly ash pastes were extracted by the steel-die method, and analyzed using ICP-OES analysis technique. According to the saturation index from thermodynamic calculations, the pore solutions of alkali-activated slag pastes kept oversaturated with respect to solid reaction products...journal article 2019
- document
-
Li, Z. (author), Nedeljković, Marija (author), Chen, B. (author), Ye, G. (author)This study investigates the effectiveness of metakaolin (MK)in mitigating the autogenous shrinkage of alkali-activated slag (AAS). It is found that the autogenous shrinkage of AAS paste can be reduced by 40% and 50% when replacing 10% and 20% slag with MK, respectively. By providing additional Si and Al, and decreasing the pH of the pore...journal article 2019
- document
-
Zuo, Y. (author), Nedeljković, Marija (author), Ye, G. (author)In previous researches, the thermodynamic modelling of alkali-activated slag was conducted as a function of the degree of reaction of slag, which makes it difficult to compare the modelling results with the experimental results in a time scale. In this study, the reaction kinetics of sodium hydroxide activated slag was studied using...journal article 2018
- document
-
Nedeljković, Marija (author), Lukovic, M. (author), van Breugel, K. (author), Hordijk, D.A. (author), Ye, G. (author)This paper presents a development of a ductile alkali-activated fly ash (FA) and ground granulated blast furnace slag (GBFS) based composite as an environmentally friendly material for structural concrete application. For this purpose, polyvinyl alcohol (PVA) fibres and sand aggregate were combined with alkali-activated paste. Workability,...journal article 2018
- document
-
Nedeljković, Marija (author), Šavija, B. (author), Zuo, Y. (author), Lukovic, M. (author), Ye, G. (author)The aim of this paper was to investigate the effect of natural carbonation on the pore structure, and elastic modulus (E<sub>m</sub>) of alkali-activated fly ash (FA) and ground granulated blast furnace slag (GBFS) pastes after one year of exposure in the natural laboratory conditions. The chemical changes due to carbonation were examined by...journal article 2018
- document
-
Nedeljković, Marija (author), Ghiassi, Bahman (author), Melzer, S (author), Kooij, Chris (author), van der Laan, Sieger (author), Ye, G. (author)Quantification of the CO2 binding capacity of reinforced concrete is of high<br/>importance for predicting the carbonation potential and service life of these structures. Such information is still not available for alkali activated materials that have received extensive attention as a sustainable substitute for ordinary Portland cement (OPC)...journal article 2018
- document
-
Nedeljković, Marija (author), Zuo, Y. (author), Arbi, Kamel (author), Ye, G. (author)In this paper, carbonation resistance of alkali-activated slag (AAS) pastes exposed to natural and accelerated conditions up to 1 year was investigated. Two aspects of carbonation mechanism were evaluated. The first was the potential carbonation of the main binding phases in finely powdered AAS pastes. The second was the reactivity and...journal article 2018
- document
-
Nedeljković, Marija (author), Li, Z. (author), Ye, G. (author)The engineering properties of alkali activated materials (AAMs) mainly depend on the constituent materials and their mixture proportions. Despite many studies on the characterization of AAMs, guidelines for mixture design of AAMs and their applications in engineering practice are not available. Extensive experimental studies are still necessary...journal article 2018
- document
- Aldin, Zainab (author), Nedeljković, Marija (author), Lukovic, M. (author), Liu, Jiahua (author), Blom, Kees (author), Ye, G. (author) conference paper 2017
- document
-
Arbi Ghanmi, K. (author), Nedeljković, Marija (author), Zuo, Y. (author), Ye, G. (author)Alkali-activated materials (AAMs) have high potential as alternative binder to ordinary portland cement (OPC), because of their high performance beside lower CO<sub>2</sub> emissions. While there is a general consensus about their strength advantages over OPC, there is a widespread debate regarding their durability. Some groups believe that...journal article 2016
- document
-
Zuo, Y. (author), Nedeljković, Marija (author), Arbi Ghanmi, K. (author), Ye, G. (author)A newly developed thermodynamic approach was introduced from the literature to investigate the influence of NaOH content on the hydrate assemblage and chemistry of aqueous solution of activated slag paste (Na2O/slag=4%, 6% and 8%). The ICP-OES test was performed to obtain the aqueous species profiles such as Si, Ca, Al and Na etc. The elemental...conference paper 2016
- document
-
Nedeljković, Marija (author), Arbi Ghanmi, K. (author), Zuo, Y. (author), Ye, G. (author)The performances of alkali activated materials (AAM) are strongly related to their microstructures. The microstructure development is mainly affected by chemistry of the primary raw materials. In the present study the influence of different proportions of fly ash and slag (100:0, 70:30, 50:50, 30:70, 0:100 wt.%, named S0, S30, S50, S70, S100,...conference paper 2016
- document
-
Arbi Ghanmi, K. (author), Nedeljković, Marija (author), Zuo, Y. (author), Ye, G. (author)Alkali-activated materials (AAM) have received increasing interest during the past few decades due to their environmental and technological advantages. However the durability of these binders is still considered as an unproven issue that needs to be addressed before their commercial adoption and large-scale production. The present work is...conference paper 2016
- document
-
Zuo, Y. (author), Nedeljković, Marija (author), Ye, G. (author)The technology of alkaline activation of calcium aluminosilicate materials, as an alternative to Portland cement to produce a clinker-free material, can address the energy and environmental concerns associated with Portland cement production. As this technology attracts more and more attention in recent years, there are increasing researches...conference paper 2016