Naslov (srp)

Uticaj dodatka fino samlevenog recikliranog stakla od katodnih cevi na svojstva cementnog maltera i betona

Autor

Grdić, Dušan 1988-

Doprinosi

Ristić, Nenad 1982-
Topličić Ćurčić, Gordana 1961-
Radonjanin, Vlastimir 1957-
Malešev, Mirjana 1958-
Zakić, Dimitrije 1967-

Opis (eng)

In the experimental part of the dissertation, the potential of usage of finely milled CRT glass (<0,063 μm) in making mortar and concrete is tested and analyzed. Eight mortar and concrete mixtures each have been made. Pulverized glass is used to replace a share of cement, the replacement percentage in both composites being: 5%, 10%, 15%, 20% and 35%, by mass. The adopted upper limit for replacement of cement with glass is in accordance with the maximum share of other mineral admixtures in CEM II cement. Also, two batches of mortars and concretes were made with addition of 5% and 10% of CRT to total amount of cement. A comprehensive testing of properties of fresh cement composites modified in this manner has been conducted, as well as of mechanical strengths, rheological characteristics and durability. Among other things, durability tests included: freeze/thaw resistance and freeze/thaw resistance with deicing salt, water impermeability, sulphate attack and leaching tests. Also, a SEM and EDS analysis of mortar and concrete samples is conducted. The analysis and processing of the results helped form the conclusions regarding potential of usage of CRT glass for making mortar and concrete, and assess durability of these modified cement composites. Finely milled cathode ray tube glass is puzzolanically active and does not cause alkali-silicate reaction. In mortars, CRT glass can be used for replacement up to 20% without causing any considerable decline of compressive or flexural strengths, while mortar retains its integrity under freeze/thaw conditions. Addition of glass up to 10% in relation to the total amount of cement in mortar improves physical-mechanical properties. Mechanical strengths of concrete with a share of cement replaced with CRT up to 15% are improved. Durability of concrete with the same share of replacement is not compromised. is The replacement of 20% by mass can be considered the upper limit for replacement of a share of cement with glass in concrete mixes, whereby the mechanical strengths of concrete are negligibly degraded, while durability in terms of action of freeze/thaw with deicing salt is questionable. The results the leaching test of concrete with CRT glass confirm that these concretes do not present an environmental challenge.

Opis (srp)

Biografija autora: list 271;Bibliografija: listovi 212-223. Datum odbrane: 26.02.2020. Civil engineering materials and Concrete technology

Jezik

srpski

Datum

2019

Licenca

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Creative Commons CC BY-NC-ND 2.0 AT - Creative Commons Autorstvo - Nekomercijalno - Bez prerada 2.0 Austria License.

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