Özgür Ekincioğlu

• Istanbul Technical University

Article is available at https://link.springer.com/article/10.1007/s10973-022-11671-3 The potential degradation of calcium aluminate cement (CAC) concrete due to the conversion of thermodynamically meta-stable compounds into stable phases is a well-known phenomenon. This research focuses on the effects of polymers on the hydration kinetics and stre...

Cement-based materials that are produced with calcium aluminate cement (CAC) exhibit severe strength losses with time and temperature due to the conversion of metastable hydrates (CAH10 and C2AH8) into the stable hydrates (C3AH6 and AH3). On the other hand, using mineral admixtures at different ratios during the production of cement-based materials...

Macro defect free (MDF) cements are polymer-cement composites characterized by high biaxial flexural strength compared to traditional concrete, having as a drawback a low water resistance. Glazing these composite materials with an inorganic enamel containing TiO2 nano-particles has led to a high water-stable material with advanced photocatalytic pr...

The research focuses on the early age calorimetric behavior and the heat of hydration of supplementary cementitious material (SCM) incorporated calcium aluminate cement (CAC) mortars at two different temperatures. The isothermal calorimetry is a useful tool to study the effects of different additives and temperatures on the hydration processes of c...

Macro-defect-free (MDF) composites, developed and patented by scientists from Imperial Chemical Industries in the early 1980s, are very high strength cement–polymer composites. The preparation of MDF composites is different from the production of conventional cement paste in that high shearing with a roller mill as well as moderate pressure (about...

The TiO2 nanoparticles exhibit a remarkable photocatalytic activity against wastewater organic pollutants but their separation from the liquid media after the photocatalytic process is a very difficult task. The immobilization of TiO2 on different supports could be a good solution to simplify the cleaning stage after photocatalysis. In this study,...

Macro defect free cements (MDF), a kind of polymer-cement composites, are characterized by remarkably high mechanical properties. Their flexural strengths are 20-30 times higher than those of conventional cement pastes, nearly equal to that of an ordinary steel. The main drawback of MDF cements is their sensitivity to water. This paper presents a m...

The usage of polymers in different sectors has been increasing in recent decades, and even our current age may have been defined as polymer age. When concrete is considered polymers are also widely used to modify the properties of both mortar and concrete and the usage of polymers in concrete dates back to 1920’s. On the other hand, Macro-defect fr...

One of the keys to achieve the sustainable construction goals in green projects is to select appropriate building materials for construction. Such projects aim to use eco-friendly materials that encourage the consumption of recycled and renewable materials, locally manufactured with less harmful gas emis- sions with long and durable profiles. Using...

produced by mixing cement with small amounts of polymer and water. Special production technique and the crosslinking occurred between cement and polymer are important factors for obtaining such high strengths. However, MDFs lose considerable strength when exposed to water. The objective of this study was to explore the effects of TiO2 addition on f...

Macro-defect free (MDF) cement is a high-strength cement-polymer composite produced by mixing cement (commonly calcium aluminate cement) with small amounts of polymer (commonly polyvinyl alcohol acetate) and water, applying high shear, and finally applying relatively low pressure (about 5 MPa) and modest temperature (about 80-100 degrees C). Howeve...

The structural characterization is very important in evaluating the performance and the durability of Macro Defect Free (MDF) cements. These are cement-polymer composites characterized by high value of flexural strength. In spite of such remarkable mechanical properties, their use on large scale has been limited due to insufficient moisture resista...

Macro-defect-free (MDF) cements are cement-polymer composites and were developed by Birchall et al. three decades ago. The composites are produced by mixing small amounts of polymer and water with cement. However, they have a different production method than that of cement pastes, which was inspired by rubber production. Mixtures of cement, polymer...

Macro-Defect-Free (MDF) cements are polymer-cement composites characterized by high value of flexural strength. Due to their thermal and electrical insulating properties, MDF cements could replace other insulators obtained by environmental non-friendlier technologies or being themselves toxic and non-biodegradable. MDF cements obtained by the use o...

Macro Defect Free (MDF) cements are cement polymer composites obtained by using water soluble polymers aiming to achieve very high mechanical properties. In spite of their excellent flexural strength, the main issue of these composites is the behavior in humid atmosphere. MDF flexural strength decreases sometimes more than half of their initial str...

Macro-defect-free (MDF) cements are cement-polymer composites characterised by high tensile and flexural strength but serious durability problems were observed when these composite materials are in contact with water. In order to improve the water resistance, MDF cements were produced by addition of two types of self crosslinkable polymers. The aim...