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Pregled bibliografske jedinice broj: 296803

Application of thermal methods in the chemistry of cement: Kinetic analysis of Portlandite from non-isothermal thermogravimetric data

Zelić, Jelica; Ugrina, Leticija; Jozić, Dražan
Application of thermal methods in the chemistry of cement: Kinetic analysis of Portlandite from non-isothermal thermogravimetric data // 1st International Proficiency Testing Conference :_ Proceeding / Guslicov, Graziela (ur.).
Sinaia: I.S.C. CERPROCIM S.A., 2007. str. 420-429 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)

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Naslov
Application of thermal methods in the chemistry of cement: Kinetic analysis of Portlandite from non-isothermal thermogravimetric data

Autori
Zelić, Jelica ; Ugrina, Leticija ; Jozić, Dražan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
1st International Proficiency Testing Conference :_ Proceeding / Guslicov, Graziela - Sinaia : I.S.C. CERPROCIM S.A., 2007, 420-429

ISBN
978-973-8132-65-8

Skup
1st International Proficiency Testing Conference, Sinaia

Mjesto i datum
Sinaia, Rumunjska, 11.10.2007. - 13.10.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Cement Hydration; Calcium Hydroxide (Portlandite); Kinetic analysis; Flynn-Wall-Ozawa method; Activation energy; TGA.

Sažetak
Kinetic investigations are, today, one of the most important application of thermal analysis. Under the methods summarized by thermal analysis, differential scanning calorimetry (DSC) and thermogravimetry (TGA) have outstanding significance. In present work, a procedure for evaluating the thermal decomposition kinetics of the calcium hydroxide, Ca(OH)2-Portlandite formed into hydrated ordinary Portland cement (OPC) paste with use of non-isothermal thermogravimetric data is proposed. The investigation was made at the temperature of the thermal decomposition of Ca(OH)2 ranging from 330-460 oC in the nitrogen atmosphere at four heating rates, β = 5, 10, 15 and 20 oC/min. The activation energy was determined by using the Flynn-Wall and Ozawa (FWO) isoconversional method. The results showed that activation energy (E) is decreasing function of conversion (α ), which is in good agreement with literature data. The E values obtained for Portlandite were compared with those for pure, analytic grade calcium hydroxide and, are discussed taking into account the complexity of the cement hydration reaction. The proposed approach is also substantiated using thermo-kinetic results on effect of pozzolanic additions (such as silica fume) on the cement hydration and is shown to be of practical importance.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo



POVEZANOST RADA

Projekti:
011-1252970-2252 - Primjena letećeg pepela u novim anorganskim vezivnim materijalima (Zelić, Jelica, MZOS ) ( CroRIS)

Ustanove:
Kemijsko-tehnološki fakultet, Split

Profili:

Avatar Url Jelica Zelić (autor)

Avatar Url Dražan Jozić (autor)

Poveznice na cjeloviti tekst rada:

Pristup cjelovitom tekstu rada www.pt-conf.ro

Citiraj ovu publikaciju:

Zelić, Jelica; Ugrina, Leticija; Jozić, Dražan
Application of thermal methods in the chemistry of cement: Kinetic analysis of Portlandite from non-isothermal thermogravimetric data // 1st International Proficiency Testing Conference :_ Proceeding / Guslicov, Graziela (ur.).
Sinaia: I.S.C. CERPROCIM S.A., 2007. str. 420-429 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
Zelić, J., Ugrina, L. & Jozić, D. (2007) Application of thermal methods in the chemistry of cement: Kinetic analysis of Portlandite from non-isothermal thermogravimetric data. U: Guslicov, G. (ur.)1st International Proficiency Testing Conference :_ Proceeding.
@article{article, author = {Zeli\'{c}, Jelica and Ugrina, Leticija and Jozi\'{c}, Dra\v{z}an}, editor = {Guslicov, G.}, year = {2007}, pages = {420-429}, keywords = {Cement Hydration, Calcium Hydroxide (Portlandite), Kinetic analysis, Flynn-Wall-Ozawa method, Activation energy, TGA.}, isbn = {978-973-8132-65-8}, title = {Application of thermal methods in the chemistry of cement: Kinetic analysis of Portlandite from non-isothermal thermogravimetric data}, keyword = {Cement Hydration, Calcium Hydroxide (Portlandite), Kinetic analysis, Flynn-Wall-Ozawa method, Activation energy, TGA.}, publisher = {I.S.C. CERPROCIM S.A.}, publisherplace = {Sinaia, Rumunjska} }
@article{article, author = {Zeli\'{c}, Jelica and Ugrina, Leticija and Jozi\'{c}, Dra\v{z}an}, editor = {Guslicov, G.}, year = {2007}, pages = {420-429}, keywords = {Cement Hydration, Calcium Hydroxide (Portlandite), Kinetic analysis, Flynn-Wall-Ozawa method, Activation energy, TGA.}, isbn = {978-973-8132-65-8}, title = {Application of thermal methods in the chemistry of cement: Kinetic analysis of Portlandite from non-isothermal thermogravimetric data}, keyword = {Cement Hydration, Calcium Hydroxide (Portlandite), Kinetic analysis, Flynn-Wall-Ozawa method, Activation energy, TGA.}, publisher = {I.S.C. CERPROCIM S.A.}, publisherplace = {Sinaia, Rumunjska} }

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