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    Building panel production incorporated with fly ash
    (Iop Publishing Ltd, 2019) Yildirim, G.; Keser, H.; Dogan-Saglamtimur, N.; Celik, F.
    With the increase in industrialization, the amount of fly ash (FA), which is one of the industrial solid wastes causing environmental and human health problems, is increasing day by day. Waste valorization and reuse methods need to be developed for this waste ash. The construction industry is the main sector where it is used. In this study, it is aimed to evaluate the usability of industrial FA in the production of economical and useful building panels and to determine their physical-mechanical properties. FA supplied from Isken Sugozu Thermal Power Plant (ISTPP), ordinary Portland cement (OPC) supplied from CIMSA Cement Industry and Trade Inc., molding plaster (MP) and lime are the materials of this study. Particle distribution curves were determined by using laser scattering method for FA(ISTPP). In this study, compressive and flexural strengths, water absorption, bulk density and porosity as mechanical and physical tests were made in the building panels having the combination of FA(ISTPP)+cement FA(ISTPP)+MP and FA(ISTPP)+lime in contribution ratios of 10, 30, 50, 70 and 90%FA(ISTPP). The results of the experiments show that the highest compressive strengths values in 7 and 28 days found in the building panels having combination of 90% cement+10% FA(ISTPP) are 57.30 and 64.20 MPa, respectively. It was determined that the value-added building panels could be produced from FA(ISTPP), an industrial solid waste, in the appropriate proportions of cement contribution.
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    Environmental and sustainable aspects of green building: A review
    (Iop Publishing Ltd, 2019) Ciner, F.; Dogan-Saglamtimur, N.
    Public and scientific focus of interest on climate changes, population increase, rapid urbanization is rising day by day. Thus, increased demand for green buildings that reduces negative impacts, and can creates positive impacts on climate, natural environment and sustainable development is a new topic. Green buildings must be not only eco-friendly (efficiently use energy, water, and other resources, use renewable energy, reduce pollution and waste, enable reuse and recycling, have good indoor environmental quality, use of materials that are non-toxic, ethical and sustainable) but also function as the key part to provide a comfortable working/living environment for human activities and improve quality of life. It is realised that green buildings as a worldwide response to raise awareness of the role of human activity in global climate changes, with maximum expression in Leadership in Energy and Environmental Design (LEED) Certification and its five basic requirements: Sustainable Space (SS), Materials and Resources (MR), Energy and Atmosphere (EA), Environmental Quality (EQ), and Water Efficiency (WE).The aim of this study is to review the environmental and sustainable aspects of green buildings. For this goal,environmental and sustainable aspects of green building including its origin, concept, eco-friendly properties, benefits, tools, rating systems, certifications are given and discussed in detail in this study.
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    The effect of alkali activation solutions with different water glass/NaOH solution ratios on geopolymer composite materials
    (Iop Publishing Ltd, 2019) Dogan-Saglamtimur, N.; Oz, H. Oznur; Bilgil, A.; Vural, T.; Suzgec, E.
    In this study, geopolymer materials were produced from fly ash (FA) supplied from Isken Sugozu Thermal Power Plant located in Adana, Turkey. FA and Rilem Cembureau Standard Sand were used together with the ratio of 0.50. At first, two different alkaline solution/material ratio (FA+standard sand) (L/M) were selected as 0.20 and 0.40 for the design parameters. In the production of geopolymer composite material, sodium silicate (Na2SiO3) and sodium hydroxide (12 M NaOH) were used together within the ratio of 1, 1.5, 2, 2.5 and 3 by weight, respectively. A totally of 20 mixes were cured at 70 and 100 C for 24 hrs, respectively and thereafter kept in room temperature until testing age. Physical characteristics of hardened mortar were determined via the bulk density, water absorption and porosity values at 28 days while the strength of geopolymers was obtained on the results of compressive strength and flexural strength tests conducted at 7, 28 and 90 days. Considering the testing parameters, geopolymer material with the highest compressive strength was found as 76.0 MPa (28-days) on the mixture produced with L/M ratio of 20% by weight; the alkaline solution consisted of a mixture of Na2SiO3 and 12 M NaOH in weight ratio of 2 by curing at 70 degrees C for 24 hrs. However, test results showed that there was an optimum limit for the alkaline solution ratio, such that exceeding this limit gave the reverse effect for the strength characteristics of the geopolymer material.