اصلاح خواص فيزيكي و مكانيكي قير با استفاده از نانو ذرات جامد و روغن هاي حاصل از پيروليز تايرهاي فرسوده

چكيده انگليسي :

Modification of Physical and Mechanical Properties of Bitumen using Solid Nanoparticles and Oils Produced by Pyrolysis of Spent Tires Milad Vaez Dalili m vaezdalili@ce iut ac ir January 23 2013 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Keyghobad Shams k shams@cc iut ac ir Abstract Bitumen also known as asphalt is a gluey black liquid or semi solid material with considerably high viscosity The primary utilization of bitumen is in road paving where it is used as the binder mixed with sand gravel and aggregate particles to produce road paving or coating concrete Generally bitumen is used became of its two distinct properties i e adhesion and waterproofing Bitumen is also used as bitumen water proofing material for sealing roofs and floors The direct use of bitumen in its native form in road construction is not suitable became it would lead into relatively rapid destruction and deformation of pavement due to heavy road motor vehicle traffic and temperature change over time Hence modification of bitumen for better performance properties attracted much attention in recent decades Modification of bitumen properties can be performed by chemical and or physical pretreatment Use of polymers is nowadays a matter of common practice and use of used tire rubber pyrolysis products has been reported in recent years In this research project pulverized truck used tire was subject to pyrolysis and the by products along with poly phosphoric acid was blended with a local refinery bitumen type 85 100 and the properties of the final compound were evaluated A pyrolysis reactor setup was designed constructed and used for pyrolysis experiments In each batch 150 g of used tire powder NR was used and the final product distributions were analyzed In pyrolysis experiments effects of addition of such heavy solid paraffin and sodium hydroxide were studied Results of pyrolysis indicate that the addition 5 10 and 15 g of sodium hydroxide increase the pyrolysis residue from 33 no additive to 43 15 g sodium hydroxide On the other hand addition of 1 g solid paraffin increased the pyrolysis oil from 37 5 to 42 and addition of both additives leads to decreased pyrolysis oil decreased residue and increased gas products Pyrolysis oil products were subject to solvent extraction tests using acetone Results show that when 1 g of solid paraffin is used the dissolution of pyrolysis oil in acetone is decreased from 64 7 to 51 3 and that the reduction of dissolution in acetone is inversely proportional to the amount of the solid paraffin used Finally addition of 3 wt of pyrolysis oil to 85 100 bitumen results into increased penetration from 90 dmm to 119 5 dmm and the softening point is increased from 46 1 C to 40 3 C Further addition of 0 5 wt solid nano particles of the pyrolysis residue and 1 5 wt PPA the penetration is decreased from 90 dmm to 41 5 dmm and softening point is increased from 46 1 C to 67 2 C and ductility is decreased from over 100 cm to 8 5 cm Keywords Bitumen elastic powder hydroxide sodium solid paraffin pyrolysis polyphosphoric acid modification PDF created with pdfFactory trial version www pdffactory com

واعظ دليلي، ميلاد

اصلاح خواص فيزيكي و مكانيكي قير با استفاده از نانو ذرات جامد و روغن هاي حاصل از پيروليز تايرهاي فرسوده

پودر لاستيك , سديم هيدروكسيد , پارافين جامد , پلي فسفريك اسيد