Valorizacija otpadnog sumpora pri sintezi ekološkog samovezujućeg betona

##plugins.themes.bootstrap3.article.main##

Aleksandar Savić Sanja Martinović Milica Vlahović Zoran Stević Tatjana Volkov Husović

Apstrakt

Samovezujući beton obično sadrži određenu količinu vrlo finog mineralnog punioca kao što je krečnjačko brašno. Cilj ovog rada bio je da se krečnjak delimično zameni elemenarnim otpadnim sumporom koji je higrofoban i nerastvoran u vodi što znači da je hemijski intertan u betonskim mešavinama. Poređena su svojstva konvencionalnog samovezujućeg betona sa krečnjakom i nekoliko sastava betona sa različitim sadržajem sumpora. Izvršena su ispitivanja pritisne, savojne i adhezione čvrstoće, dinamičkog modula elastičnosti, specifične električne otpornosti, gustine, mikrostrukture kao i infracrvena termografska. Rezultati su pokazali neznatan pad pritisne, zatezne i adhezione čvrstoće, kao i dinamičkog modula elastičnosti. Vrednosti specifične električne otpornosti i gustine su bile više za uzorke sa sumporom. SEM analiza je pokazala slabo povećanje poroznosti uzoraka sa sumporom. Infracrvena termografija je korišćena kao brza metoda za detektovanje unutrašnjih deformacija. Imajući u vidu da bi sva svojstva trebalo da ostanu ista ili da se poboljšaju u slučaju korišćenja otpadnog sumpora uz postavljene kriterijume za samozbijajući beton, ovo istraživanje je pokazalo da se svi ispitivani sastavi betonskih mešavina mogu koristiti za određene konstrukcione primene.

##plugins.themes.bootstrap3.article.details##

Kako citirati
SAVIĆ, Aleksandar et al. Valorizacija otpadnog sumpora pri sintezi ekološkog samovezujućeg betona. Zbornik Međunarodne konferencije o obnovljivim izvorima električne energije – MKOIEE, [S.l.], v. 6, n. 1, p. 221-228, oct. 2018. Dostupno na: <https://izdanja.smeits.rs/index.php/mkoiee/article/view/3795>. Datum pristupa: 10 dec. 2018
Sekcija
Aplikacije i usluge

Reference

[1] Marinkovic SB. Life cycle assessment aspects of concrete. In: Pacheco-Torgal F. et al, editors. Eco-Efficient Concrete. Woodhead Publishing Limited, 2013.p.45-80.
[2] Marinkovic SB, Ignjatovic IS, Radonjanin VS.Life cycle assessment (LCA) of concrete with recycled aggregates (RAs). In:Pacheco-Torgal F. et al, editors. Handook of recycled concrete and demolition waste.Woodhead Publishing Limited, 2013. p. 569-604.
[3] Savic A. Investigation of the properties of fresh and hardened self-compacting concrete with mineral additions based on industrial by-products. PhD Thesis. Faculty of Civil Engineering, University of Belgrade, 2015.
[4] Silva YF,Robayo RA, Mattey PE, Delvasto S. Properties of self-compacting concrete on fresh and hardened with residue of masonery and recycled concrete.Constr Build Mater 2016; 124:639-644.
[5] *** ACI 238.1R-08: Report on Measurements of Workability and Rheology of Fresh Concrete, American Concrete Institute, 2008.
[6] *** European Guidelines for Self-Compacting Concrete: Specification, Production and Use, European Project Group, 2005.
[7] Nehdi ML, Pardhan M, Koshowski S. Durability of self-consolidating concrete incorporating high-volume replacement composite cements. Cement Concrete Res 2004;34 (11):2103-2112.
[8] Ozawa K. Utilization of new concrete technology in construction project- Future prospects of self-compacting concrete. In: Proceedings of 2nd International RILEM Symposium on Self-Compacting Concrete. Tokyo, 2001. p.55-62.
[9] Ranjibar MM, Madandoust R, Mousari SY, Yosefi S, Effects of natural zeolite on the fresh and hardened properties of self compacting concrete, Construction and Building Materials 47 2013, 806-813.
[10] Felekoglu B, Tosun K, Baradan B, Altun A, Uyulgan B. The effect of fly ash and limestone fillers on the viscosity and compressive strength of self-compacting repair mortars. 2006;36(9):1719-1726.
[11] Sahmaran M, Christianto HA, Yaman IO.The effect of chemical admixtures and mineral additives on the properties of self-compacting mortars. Cement Concrete Comp 2006;28:432-440.
[12] Vlahovic M, Jovanic P, Martinovic S, Boljanac T, Volkov- Husovic T, Quantitative evaluation of sulfur-polymer matrix composite quality, Composites Part B: engineering, Volume 44, Issue 1 (2013) 458-466.
[13] Vlahovic M, Savic M, Martinovic S, Boljanac T, Volkov-Husovic T, Use of image analysis for durability testing of sulfur concrete and Portland cement concrete, Materials and Design, 34 (2012) 346-354.
[14] Vlahovic M, Martinovic S, Boljanac T, Jovanic P, Volkov Husovic T, Durability of sulfur concrete in various aggressive environments, Construction and Building Materials, 25 (2011) 3926-3934.
[15] *** The European Guidelines for Self-Compacting Concrete: Specification, Production and Use, European Project Group, (2005).
[16] *** SRPS EN 12390-3:2010/AC:2014; Testing hardened concrete - Part 3: Compressive strength of test specimens – Corrigendum.
[17] *** SRPS EN 12390-5:2010 Testing hardened concrete - Part 5: Flexural strength of test specimens.
[18] *** SRPS EN 1542:2010 Products and systems for the protection and repair of concrete structures - Test methods - Measurement of bond strength by pull-off.
[19] E. Pereira, M.H.F. de Medeiros, Pull Off test to evaluate the compressive strength of concrete: an alternative to Brazilian standard techniques, Revista IBRACON de Estruturas e Materials, Vol.5 No. 6 (2012) 775-780.
[20] *** SRPS U.M1.026:1993 Concrete - Determination of the dinamic modulus of elasticity and Poisson's ratio.
[21] *** SRPS U.M1.042:1998 Concrete, hardened - Determination of ultrasonic pulse velocity.