Analysis of strength, durability, and viscosity properties of self-compacting mortars which have multi-mineral additives

More than a century, concrete has been used as a construction material all over the world, and its application areas have increased and become widespread each day. Moreover, concrete is expected to have distinct performances according to application areas or the construction used. These expectations could be met only by special concretes. Today, one of the most special concrete types used is self-compacting concrete (SCC), In order to know well of SCC, at first the structure of SCM has to been examined very well. It is important to be known that the physical and chemical structure of SCM and that building materials comply with each other. In this thesis, strength and durability properties of the mortar obtained by chemical additive, superplasticers, have been increased according to appropriate rheogical, TS-EN and EFNARC standards. The mixtures in which PC 42.5 cement, fly ash, and limestone powder have been used as binders have been attained. These binders are used in the mixtures as binary and ternary binders. The weight rate of cement is between 20%-100%, the weight rate of fly ash is10%-40% and the weight rate of limestone powder is 30%-60%. For the good strength and durability features, main requirement is that fresh mortar has qualified properties. For this reason, spread, flow time of V-funnel, viscosity, and unit volume weight of fresh mortar have been analysed. Besides it has been considered that these features are according to the current standards. Of strength features; compressive strength, flexural-tensile strength, relative ultrasonic velocity, dynamic modulus of elasticity, and of durability features; total water absorption capacity, capillary water absorption rate, measurement of the specific gravity, determination of the ratio of visible vacancy rate, Bohme abrasion (weight loss, length reduction), adhesion between mortar and reinforcement have been researched. Thereafter the correlations all of these feature have been analysed. Thus, with the non-destructive experiments methods, the control of the systems of static and reinforced concrete will be able to be done. Besides, by the correlations put forward, the learning of such construction features as durability, which these take a long time, is going to be possible with 90 % accuracy for less time. While the hardened mortar has been examined, the rate and the type of binder materials have been chosen similarly. The aim of this study is to keep the correlation among all features of mortar from the effects of other parameters. The test samples used in this study; 4x4x16 cm3, which is for compressive strength and flexural tensile strength; 10x10x10 cm cube, which is for relative ultrasonic velocity; 15x15x15 cm cube, which is for adhesion; 7.1x7.1x7.1 cm cube, which is for experiments of Bohme abrasion. During 28 days and at 23±2 oC, the tests samples have been held in the water cure. In addition, other tests samples which have been held in water cure additional 7 and 90 days have been used for compressive strength and flexural tensile strength. In the consequence of experiments, the fly ash has been more effective on the all features of the mortar than limestone powder. On the other hand, the specific rates of the combination fly ash and limestone powder have more succeeded than the use of these minerals separately. According to results, for the purpose of bringing down the costs, the use of at least 50% for cement, about 20% for fly ash, about 30% for limestone powder, have been proved to be suitable for binder rates. As a result, in the same time, the use of ternary binders above has given more successive outputs on both fresh and hardened mortar features. The use of more minerals than being specified the rates above and the use of cement 50% have not given good results, especially in the hardened mortar experiments.