Investigation of the manufacturability of self located heavy concrete using barite aggregate

The building material obtained by mixing certain proportions of cement, aggregate, water and, if necessary, some additives is called concrete. In today's world, the use of concrete material especially in the field of construction is increasing day by day. Since the use of concrete material is widespread day by day, its mechanical and physical properties should be examined comprehensively. As a result of the studies, it has been revealed that conventional concrete is lacking in meeting some special needs such as high strength and durability. In order to eliminate these deficiencies and to provide convenience, steps have been taken to produce special concretes. KYAB is a building material that is used to easily pass through narrow passages where reinforcements are frequent without using vibration and to ensure proper placement of the molds and to protect from rays that pose a serious threat to human health depending on the developing technology. In addition, the most important difference of KYAB from conventional concrete is the high density of the aggregate used in the mixture and the use of special additives such as super plasticizer. In this thesis, firstly, an approximate mathematical model has been developed for the reaction method prosthesis, heavy concrete design mixture, which will be shown on the screen in the literature. In this model, the values of the S / Ç and A / Ç stands were calculated, while the pressure values of the 28-day concrete were determined as the response (response). The reason for choosing Buler; These factors have significant effects on responses. Then, the manufacturability of self-compacting heavy concrete by traveling barite aggregate was experimentally investigated. In the scope of this thesis study, 6 different trial mixes are designed. 2 different cement quantities, 350 kg / m3 and 420 kg / m3, were used in the mixtures. In these mixtures, different binder mixtures were formed by substituting super plasticizer additive 0.9% and fly ash 15% instead of cement. In mixtures with the same cement amount, the amount of fly ash and chemical additives were kept constant. Trial mixes with A / Ç ratios 0.50, 0.55, 0.60 with 350 kg / m3 binder dosage and 420 kg / m3 binder dosage with A / Ç ratios of 0.48, 0.53, 0.58 were prepared. The flowability, workability and strength properties of the concrete produced were examined. Thus, it was concluded that the most important parameters affecting the strength and workability properties of self-compacting heavy concrete are S / Ç and A / Ç ratio. It has been observed that in order to obtain this special type of concrete, the correct chemical additives and fly ash materials with a spherical structure must be used in the mixtures. In addition, it was concluded that barite aggregate, which is a heavy aggregate, can be used in the production of self-compacting heavy concrete.