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This paper presents the results of an experimental study on the effects of fly ash, different water/(cement + mineral additive) ratios and pumice aggregates to some physical and mechanical properties of self-compacting lightweight aggregate concrete. In this study, pumice had been used as lightweight aggregates. Several properties of self-compacting pumice aggregate lightweight concretes like the unit weight, flow diameter, T50 time, flow diameter after an hour, V-funnel time, and L-box tests, 7, 28, 90 and 180-day compressive strength, 28-day splitting tensile strength, dry unit weight, water absorption, thermal conductivity and ultrasonic pulse velocity tests were investigated. For this purpose, 18 series of concrete samples were prepared in two groups. Pumice aggregate was used as a replacement of natural aggregate, at the levels of 0, 20, 40, 60, 80, and 100% by volume. Furthermore, a second series of 100% pumice aggregate was used for the production of self-compacting lightweight aggregate concrete with constant w/(c+m) ratios as 0.35, 0.40, and 0.45 by weight. The flow diameters, T50 times, paste volumes, 28-day compressive strengths, dry unit weights and thermal conductivities of self-compacting lightweight aggregate concrete were obtained in the range of 600-800 mm, 2-8 s, 471-572 lt/m 3 , 9.2-53.26 MPa, 839-2156 kg/m 3 and 0.321-1.508 W/mk, respectively, which satisfies not only * For correspondence 1343 1344 Murat Kurt et al the strength requirement of semi-structural lightweight concrete but also the flowing ability requirements and thermal conductivity requirements of self-compacting lightweight aggregate concrete.

The FATIH project is a project put in place by a protocol signed between the Ministry of National Education and the Ministry of Transport in order to obtain the highest level of efficiency and equal opportunities in education and training activities. Today, remote education applications have become compulsory in order to reach the rapidly changing and developing information network more easily and effectively. For this reason, an increase in distance education program designs has been observed in order to provide meaningful learning in Science and Technology course. The key role in increasing opportunities in education and improving the technology (FATIH PROJECT) is educational e-content applications. To this end, the Education Information Network (EBA) online social education platform has been established, which is equal opportunity in the basic principle education. Some of the contents in EBA, along with visual and interactive material, audio files and animations, have become the most important elementary videos of this platform. It was aimed to study science and technology course videos with a systematic understanding. Thus, it has been investigated how these videos contribute to the scope of the "FATIH Project". It is a descriptive study to examine the science and technology course videos in EBA systematically in terms of various variables. In the study, document review method was used from qualitative research methods. Science and Technology course videos analyzed in this study include Science and Technology course presentations for 5th, 6th, 7th, and 8th grade students who are available on EBA on July 28th, 2017. 433 course videos were reviewed by each of the researchers in terms of eight (8) predetermined questions that were repeated five times. The conclusions reached were finalized in accordance with the sub-objectives.

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