No abstract

Deniz dibi tarama malzemesinin çevresel etkileri  Fiziko-kimyasal, toksikolojik ve sızma özellikleri  Deniz dibi tarama malzemesinin faydalı kullanım alternatifleri ön değerlendirmesi

 Beneficial use of marine dredged material in synthetic LWA production by adding industrial wastes  Improvement of the properties of LWAs with the elevation of sintering conditions  Investigation of the technical and environmental properties of the produced LWAs LWAs were ordered in a decreasing surface quality regarding their external appearence and surface texture. Sintering temperature has the major variable to obtain LWAs with smooth surface texture. All LWA series sintered at 1190°C had vitrified surface texture with no external fissures. At 1180, 1170, 1150 and 1100°C sintering temperatures, surface of aggregates were rough and some external fissures were also observed on the mantle of aggregates. Figure A. External appearance and surface texture of produced LWAs Purpose: The objective of this work is to investigate the influence of DM, FA and WFS co-utilization on the production of LWA, as well as to determine the effects of sintering temperature, heating rate and sintering period on the physical, mechanical, mineralogical, micro-structural and leaching properties of the produced artificial aggregates. The usage of DM as an ingredient in synthetic LWA production with the combination of DM and FA will provide valuable information for recycling industrial wastes. Theory and Methods: The constituent of the mixtures were determined according to bloating area of the Riley's ternary diagram. All LWAs were produced by using Pelletizing Disc (Elektron Lab, Turkey) operated at 43°, having 40 cm diameter and 11 cm depth. Rotating speed of the disc was 50 rpm and the obtained LWA granules had particle sizes of 5-12 mm. Results: Increase in DM content in aggregate mixtures led to decrease in strength properties and increase in weight loss and water absorption rates for all sintering conditions. Physical, mechanical, microstructural and mineralogical properties of coarse aggregates in all series were improved with the increase of sintering temperature. LWA produced under conditions of 1190ºC sintering temperature, 5ºC/min heating rate and 20 min sintering period resulted in optimum LWA properties. Conclusion: The outcomes of this study demonstrated that DM can be used as an ingredient in the production of artificial LWA with the combination of coal FA and WFS with no adverse physical, mechanical, mineralogical, microstructural and environmental impacts.