Searched for: faculty%3A%22Civil%255C%252BEngineering%255C%252Band%255C%252BGeosciences%22
(1 - 20 of 42)

Pages

document
Arbi, K.A. (author), Nedeljkovic, M. (author), Zuo, Y. (author), Grunewald, S. (author), Keulen, A. (author), Ye, G. (author)
This paper presents an investigation on workability and strength of geopolymer concrete made of fly ash (FA), blast furnace slag (BFS) and a multicompound activator of Na2SiO3 and NaOH solutions. The FA/BFS ratios were 100:0, 70:30, 60:40, 50:50, 40:60, 30:70 and 0:100. The workability of geopolymer concretes was performed by using slump test...
conference paper 2015
document
Lukovic, M. (author), Ye, G. (author)
In concrete repair systems, material properties of the repair material and the interface are greatly influenced by the moisture exchange between the repair material and the substrate. If the substrate is dry, it can absorb water from the repair material and reduce its effective water-to-cement ratio (w/c). This further affects the hydration rate...
journal article 2015
document
Lukovic, M. (author), Schlangen, E. (author), Savija, B. (author), Ye, G. (author), Copuroglu, O. (author)
Simulation of mechanical behaviour of heterogeneous materials is only possible if the local properties of the components are known. In recent years nano-indentation is being applied on different levels to obtain local mechanical properties. The aim of this paper is to explore various ways to obtain these properties by combining nano-indentation...
conference paper 2015
document
Lukovic, M. (author), Savija, B. (author), Dong, H. (author), Schlangen, E. (author), Ye, G. (author)
journal article 2014
document
Patel, R.A. (author), Perko, J. (author), Jacques, D. (author), De Schutter, G. (author), Van Breugel, K. (author), Ye, G. (author)
Calcium leaching is one of the important degradation mechanisms causing dissolution of the crystalline phases such as, AFm, portlandite increasing capillary porosity. Further it leads to decalcification of an amorphous C-S-H phase causing increase in the gel porosity and in turn degrading the long term performance of concrete structures. In this...
conference paper 2014
document
Zhang, Y. (author), Ye, G. (author)
Concrete is seldom saturated due to its self-desiccation. Even the submerged concrete structures may remain unsaturated for quite a long time. It has been reported the saturation level of pore solution has significant effect on species penetration. However, very little work was proposed regarding the transport properties and serviceability of...
conference paper 2014
document
Huang, H. (author), Ye, G. (author)
In this paper, different mechanisms of self-healing, i.e. self-healing based on adhesive agents, self-healing based on bacteria, self-healing based on autogenous self-healing were described. Their required conditions were summarized. The previous investigations showed that all mechanisms of self-healing are effective to some extend under...
conference paper 2014
document
Huang, H. (author), Ye, G. (author), Damidot, D. (author)
In this study, a coupled transport-reaction model was specifically developed for simulating autogenous self-healing in cementitious materials. The diffusion of ions between the solution in the crack and in the bulk paste is simulated with a transport model. The concentration of ions in the crack can be calculated. As the kinetics of chemical...
conference paper 2014
document
Huang, H. (author), Ye, G. (author), Damidot, D. (author)
In this paper, the proposed coupled transport-reaction model adapted to simulate autogenous self-healing in Portland cement paste is validated with the experimental results. The parameters are studied for modelling the dissolution of cement, the diffusion of ions between the solution in the crack and in the bulk paste and the precipitation of...
conference paper 2014
document
Lukovic, M. (author), Savija, B. (author), Schlangen, E. (author), Ye, G. (author), van Breugel, K. (author)
Differential shrinkage between repair material and concrete substrate is considered to be the main cause of premature failure of repair systems (Martinola, Sadouki et al. 2001, Beushausen and Alexander 2007). Magnitude of induced stresses depends on many factors, for example the amount of restraint, moisture gradients caused by different curing...
conference paper 2014
document
Yu, Z. (author), Ye, G. (author), Van Breugel, K. (author), Chen, W. (author)
Deterioration of microstructure in cement concrete will cause changes in the transport properties of the concrete. Transport properties at different ages of the concrete provide information about the microstructural changes of the material. A way to measure the transport properties, i.e. the chloride diffusion coefficient, in the laboratory is...
conference paper 2014
document
Zhang, Y. (author), Wu, B. (author), Zhou, J. (author), Ye, G. (author), Shui, Z. (author)
Concrete containing supplementary cementitious materials (SCMs) has different durability properties from that containing pure Portland cement. The durability of concrete is always associated with the properties of microstructure, especially pore structure. Pressurization–Depressurization Cycling Mercury Intrusion Porosimetry (PDC-MIP) was...
conference paper 2014
document
Yu, Z. (author), Ye, G. (author), Hunger, M. (author), Noort, R. (author)
Chloride-induced corrosion of reinforced concrete is one of the main deterioration mechanisms leading to shortening of the service life of concrete structures. Therefore, assessment of the resistance of concrete to chloride ingress plays an important role in predicting the service life of such structures. The Rapid Chloride Migration (RCM) test...
conference paper 2013
document
Huang, H. (author), Ye, G. (author)
conference paper 2013
document
Kayastha, N. (author), Ye, J. (author), Fenicia, F. (author), Kuzmin, V. (author), Solomatine, D.P. (author)
Often a single hydrological model cannot capture the details of a complex rainfall–runoff relationship, and a possibility here is building specialized models to be responsible for a particular aspect of this relationship and combining them to form a committee model. This study extends earlier work of using fuzzy committees to combine...
journal article 2013
document
Patel, R.A. (author), Perko, J. (author), Jaques, D. (author), De Schutter, G. (author), Ye, G. (author), Van Breugel, K. (author)
A Lattice Boltzmann (LB) based reactive transport model intended to capture reactions and solid phase changes occurring at the pore scale is presented. The proposed approach uses LB method to compute multi component mass transport. The LB multi-component transport model is then coupled with the well-established geochemical reaction code PHREEQC...
conference paper 2013
document
Dong, H. (author), Huang, H. (author), Ye, G. (author)
Many types of healing agents have been investigated. These agents are processed in different ways, such as adhesive polymer in capsules or hollow fibre glasses, bacteria in porous aggregates and geo-materials directly incorporated in the cementbased materials. In this study, sodium silicate powder is encapsulated in polystyrene particles ...
conference paper 2013
document
Huang, H. (author), Ye, G. (author)
Since self-healing of cracks is able to improve the durability of concrete structures, it has attracted much attention in the recent years. As known, in concrete matrix there are large amounts of cement grains remaining unhydrated, particularly in high performance concrete. Further hydration of these unhydrated cement grains has potential to...
conference paper 2013
document
Lukovic, M. (author), Schlangen, H.E.J.G. (author), Ye, G. (author), Savija, B. (author)
Surface roughness of the existing concrete substrate was considered to have the greatest impact on the bond strength in repair systems. However, the influence of this parameter has been subject for debates in recent years. The effect of concrete surface roughness is not quite clear, nor there exist a clear relation between the surface roughness...
conference paper 2013
document
Kayastha, N. (author), Ye, J. (author), Fenicia, F. (author), Solomatine, D.P. (author)
Often a single hydrological model cannot capture the details of a complex rainfall-runoff relationship, and a possibility here is building specialised models to be responsible for a particular aspect of this relationship and combining them forming a committee model. This study extends earlier work of using fuzzy committees to combine...
journal article 2013
Searched for: faculty%3A%22Civil%255C%252BEngineering%255C%252Band%255C%252BGeosciences%22
(1 - 20 of 42)

Pages