Roads and Bridges - Drogi i Mosty
12, 2, 2013, 191-207

Admixtures effectiveness in mortars in the presence of calcareous fly ash

Jacek Gołaszewski Mail
Silesian University of Technology, Faculty of Civil Engineering, Gliwice
Aleksandra Kostrzanowska Mail
Silesian University of Technology, Faculty of Civil Engineering, Gliwice
Patrycja Miera Mail
Silesian University of Technology, Faculty of Civil Engineering, Gliwice
Michał Drewniok Mail
Silesian University of Technology, Faculty of Civil Engineering, Gliwice
Grzegorz Cygan Mail
Silesian University of Technology, Faculty of Civil Engineering, Gliwice
Joanna Deszcz Mail
Silesian University of Technology, Faculty of Civil Engineering, Gliwice

Abstract

This paper presents a study on the influence of various admixtures (SP, PL, AE, R, ACC) on rheological properties, air content, setting time and heat of hydration of mortars with the addition of calcareous fly ash. Rheological parameters of mortars were determined using a rheometer Viskomat NT. The content of air in the mortar was determined using pressure method according to PN-EN 413-2 and initial setting time was specified according to PN-EN 196-3. The study on the heat of hydration was based on an isothermal microcalorimeter TamAir. The calcareous fly ash presence usually exerts negative influence on additives effectiveness. Activating the ash by grinding improves the additives efficiency (e.g. plasticizers, superplasticizers). The influence of calcareous fly ash on effectiveness of the additives is dependent not only on its type, but also on the type of admixture. The choice of compatible admixture should be made experimentally, taking into account the presence of calcareous fly ash.

Keywords


admixture, air content, calcareous fly ash, heat of hydration, rheological properties, setting time

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References


Giergiczny Z.: Rola popiołów lotnych wapniowych i krzemionkowych w kształtowaniu właściwości współ- czesnych spoiw budowlanych i tworzyw cementowych. Wydawnictwo Politechniki Krakowskiej, Kraków, 2006

Ramachandran V.S.: Concrete Admixtures Handbook. Properties, Science and Technology, Park Ridge, 1995

Szwabowski J.: Reologia mieszanek na spoiwach cementowych. Wydawnictwo Politechniki Śląskiej, Gliwice, 1999

Czopowski E., Łaźniewska-Piekarczyk B., Rubińska-Jończy B., Szwabowski J.: Właściwości betonów na cementach zawierających popiół lotny wapienny. Properties of concretes based on cements containing calcareous fly ash. Roads and Bridges - Drogi i Mosty, 12, 1, 2013, 31 - 40

Gołaszawski J., Kostrzanowska A., Ponikiewski T., Antonowicz G.: Wpływ popiołu lotnego wapiennego na właściwości reologiczne zaczynów i zapraw cementowych. Influence of calcareous fly ash on rheological properties of cement pastes and mortars. Roads and Bridges - Drogi i Mosty, 12, 1, 2013, 99 - 112

Piechówka-Mielnik M., Giergiczny Z.: Properties of Portland-composite cement with limestone. Cementing a sustainable future: XIII ICCC International Congress on the Chemistry of Cement, Madrid, 3 - 8 July, 2011

Baran T., Drożdż W.: Ocena właściwości krajowych popiołów lotnych wapiennych i metod ich uzdatniania. Evaluation of properties of domestic calcareous fly ash and its processing methods. Roads and Bridges - Drogi i Mosty, 12, 1, 2013, 5 - 15

Garbacik A., Baran T., Pichniarczyk P.: Charakterystyka krajowych popiołów wapiennych ze spalania węgla brunatnego. Konferencja Energia i Środowisko w Technologii materiałów budowlanych, ceramicznych, szklarskich i ogniotrwałych, Opole, 2010

Wei S., Handong Y., Binggen Z.: Analysis of mechanism on water-reducing effect of fine ground slag, high-calcium fly ash, and low-calcium fly ash. Cement and Concrete Research, 33, 8, 2003, 1119 - 1125

Yazici H.: The effect of silica fume and high-volume Class C fly ash on mechanical properties, chloride penetration and freeze-thaw resistance of self-compacting concrete. Construction and Building Materials, 22, 4, 2008, 456 - 462

Giergiczny Z., Synowiec K., Żak K.: Ocena przydatności popiołu lotnego wapiennego jako aktywnego dodatku mineralnego do betonu. Suitability evaluation of calcareous fly ash as an active mineral additive to concrete. Roads and Bridges - Drogi i Mosty, 12, 1, 2013, 83 - 97

Härdtl R., Koc I.: Evaluation of the performance of multi-component cements. ZKG International, Zement Kalk Gips (Cement Lime Gypsum), 4, 2012, 66 - 72


Admixtures effectiveness in mortars in the presence of calcareous fly ash

  
Gołaszewski, Jacek et al. Admixtures effectiveness in mortars in the presence of calcareous fly ash. Roads and Bridges - Drogi i Mosty, [S.l.], v. 12, n. 2, p. 191-207 , feb. 2014. ISSN 2449-769X. Available at: <>. Date accessed: 23 Jul. 2019. doi:http://dx.doi.org/10.7409/rabdim.013.014.