Fatigue performance of engineered cementitious composites

Aleessa Alam, Burhan
The maintenance and rehabilitation of a pavement during its service life is as much important as the construction works of this pavement. In this scope, applying the correct and efficient repair method is highly critical for economic and technical reasons. Depending on the damage level of the pavement, there are many different methods that can be used to repair the pavement. The use of an overlay is one of the most common methods, where a new layer can be applied directly over or replace the top part of an existing pavement. This overlay can be made from asphalt or concrete as well. Concrete overlays are gaining importance recently, especially with the increasing use of concrete pavements. All of these can be related to the long service life of concrete pavements compared to asphalt. However, because of the rigid nature of concrete the thickness of this overlay is higher. In this work, ECC type of concrete was suggested to be used as an overlay because with a less thickness it has the ability to reduce the reflection of the cracks from the old pavement and the overlay. To testify this property, the performance of two ECC mixtures as a concrete pavement overlay was investigated under fatigue loading. Along with that, the fatigue performance of ECC mixtures of different compositions was examined. Moreover, using Weibull distribution the failure probability of these mixtures under fatigue was determined. In addition to this, to reduce the time of the fatigue examination two new fatigue life prediction methods were suggested.


Fatigue performance of PVA fibre reinforced cementitious composite overlays
Aleessa Alam, Burhan; Yaman, İsmail Özgür (2019-07-31)
Pavement maintenance and rehabilitation is as much important as the construction work itself. In this scope, applying the correct and efficient repair method is highly critical for economic and technical reasons. Depending on the damage level, many alternative repair methods exist. Using an overlay is one common method, where a new layer can be directly applied over or replace the top part of an existing pavement. This overlay can be made from asphalt or concrete as well. With the advances in the concrete t...
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Estimation of the crack location and width in concrete structures is important due to the sustained damage in structures as a result of extreme loads and aging. The location and width of cracks are the most influential parameters for making decisions on the structure service life. Despite significant developments, the computational modelling of concrete fracture initiation and propagation are still challenging tasks. Many different numerical approaches, most of them based on finite element analysis, have be...
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Due to the massive number of deficient buildings in seismically active zones, the demolition and rebuilding of such structures is not a viable option. Instead, rehabilitation of seismically deficient buildings is commonly employed. Although, the most preferred rehabilitation approach has been the application of RC infills to the frames, this technique inevitably causes the evacuation of the structure. Therefore, there have been many studies on new occupant-friendly strengthening techniques. The aim of this ...
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Comparison of several laboratory compaction practices applied on roller compacted concrete pavements
Şengün, Emin; Shabani, Reza; Aleessa Alam, Burhan; Aykutlu, Mehmet Ali; Yaman, İsmail Özgür (2018-09-14)
Pavements can be considered as one of the most constructed, renewed and repaired structures. This fact implies the need of continuous R&D works to be able to get the highest efficiency of those pavements, which can be only done through a good harmonized conjunct work between the field and the laboratory. In the recent years, Roller Compacted Concrete (RCC) has been increasingly used in pavement applications due to many advantages of this type of concrete, and the similarity to the production equipment of as...
Citation Formats
B. Aleessa Alam, “Fatigue performance of engineered cementitious composites,” Ph.D. - Doctoral Program, Middle East Technical University, 2016.