Author: CemenTürk Dergisi

THE RELATION BETWEEN AUTOGENOUS SHRINKAGE AND HYDRATION STAGES – hıgh performance cement based panel applicatıons Bekir Y. PEKMEZCİ Istanbul Technical University, Istanbul, Turkey Abstract Autogenous shrinkage concept has started to gain more importance since the high performance-high strength concretes were began to utilize for structural purposes. These concretes are generally designed with high cementitious materials contents and low water to cementitious material ratios. It is observed that, due to lack of water in capillary pores in these concretes, autogenous shrinkage increases under the effects of not only the chemical factors but also the physical effects. The relation between autogenous shrinkage…

Introduction Although the term “Sustainability” appears to be a recent concept, in fact it is an old world-view. Even though it does not have an explanatory and general definition, the widely accepted definition of sustainability defined by Brundtland Commission is as follows: “Sustainability is to meet the needs of the present without compromising the ability of future generations to meet their own needs”. Sustainable growth requires efficient use of available sources at a maximum extend. The purpose of sustainability includes meeting basic needs and realizing that environmental sources are not unlimited and therefore performing it within a plan. The goals…

Heat transfer through a structure is of great importance in civil engineering while planning the design of a building for thermal comfort. The knowledge of thermo-physical properties of construction materials is essential in predicting the temperature profile and heat flow through the material. It is known that aggregate type significantly affect the thermo-physical properties of concrete. In this study, thermal conductivity and moisture resistance factor are investigated for concretes with different types of aggregates including calcareous, siliceous and pumice. According to the test results it was seen that the thermo-physical properties of concrete is directly influenced by the type, pore…

R. Todd Swinderman, P.E Martin Engineering Neponset, lllinois ABD This paper discusses how many of the common practices in conveyor specification and design are out of date compared to the current expectations of users for safe, serviceable, reliable, and fugitive material-free conveyance of bulk solids. Ten of the most common mistakes made in the specification and design stages related to user expectations are reviewed along with the cost vs. price implications of those decisions. A general specification and design hierarchy that designers can use to improve conveyor design is included. Introduction Belt conveyor systems are often abused, through overuse and…

IFS ERP project planned to be initiated in parallel under Bursa Çimento Fabrikası A.Ş and Bursa Beton A.Ş at the first stage will be continued by affiliates of Bursa Çimento A.Ş- Ares Çimento İnşaat San. ve Tic. A.Ş, Tunçkül Çimento Mineral Katkılar İnş. San. ve Tic. A.Ş, Çimento İnşaat Sanayi Ticaret A.Ş and Bursa Çimento Sanayi Ticaret A.Ş.Bursa Çimento Information Processing Director Şeref Ali Öztürk stated that successful use of IFS ERP in group, its functional variety as well as its customizable nature took great role in their choice and said the following regarding their choice process and decision:” In…

Doğuş İnşaat is deemed worthy of International Quality Summit Award in Golden category by BID (Business Initiative Directions). As a result of the evaluation made based on QC 100 Total Quality Management Model criteria, Doğuş İnşaat ve Ticaret A.Ş. has been entitled to receive award, which has been got by Teymur Şanlılar, Deputy General Manager in charge of Management and Information Systems. Şanlılar has been granted the award by Jose E. Prieto, BID President, in the ceremony organized in New York. Doğuş İnşaat that has entered into 170 projects with a value of more than 12 billion dollars up to…

Nurettin Özdebir, Chairman of Ankara Chamber of Industry (ACI), who participated in the 5th Meeting of Turkish Civil Engineers hosted by Gazi University, stated that 32 Turkish Companies exist amongst the biggest 225 companies of the world in construction business industry and pointed out that Turkey has the second biggest construction business capacity after China. Özdebir stated that only one reason lies behind the issue of why such number does not increase and told students that “We are not as successful in consultancy services as in construction business services. There are many duties of you in determination of such needs.’’…

For fast development of the region after Van and Erciş earthquakes; a seminar was held regarding “ Durability In Concrete, High Quality Concrete Techniques, Alcali Silica Reaction (ASR) In Concrete And Prevention Methodologies As Well As Fortification Against Earthquake” on 15.06.2012 in Vatso conference hall under main sponsorship of Gökçenay Group and with participation of esteemed lecturers from faculties of civil engineering of Istanbul Technical University and Van Yüzüncü Yıl University and Epo Yapı Kimya specialized in earthquake fortification-concrete technologies. The seminar held with broad participation was attended and supported by Mr. Zafer Coşkun, Van Deputy Governor and he made…

Erdoğan Bayraktar, the Minister of Environment and Urban Planning, who participated in the opening of City Thought Center established by the Municipality of Esenler, noted that the whole Istanbul must be dealt with and it needs urban transformation. Esenler Municipality established “City Thought Center for creation of urban identity by implementation of social, cultural, physical and urban transformation project for the borough. The Center was opened with a ceremony attended by the Minister of Environment and Urban Planning Erdoğan Bayraktar, AK Parti Istanbul Deputy Nureddin Nebati, Istanbul Governor Hüseyin Avni Mutlu and Esenler Mayor Tevfik Göksu. In his speech, the…

NURYOL Çimento San. ve Tic. A.Ş., accelerated his studies recently for the new cement plant, has contracted the project with IKN GmbH represented by FTR on 15.06.2012. The most important section of the production line – Preheater Tower, Rotary Kiln and Clinker Cooler is now binded. After a long technical evaluation period by Sintek Management and Project Team, the technical solution of IKN GmbH has been selected as the most efficient and suitable one than the others. A similar Pyro Process line has been put in to operation recently in Bartın Çimento that the performance figures have appeared the lowest…