Detail publikačního výsledku

Low Energy Cements Prepared from Modified SO3 Doped Clinkers

KHONGOVÁ, I.; ZEZULOVÁ, A.; BOHÁČ, M.; STANĚK, T.; KUBÁTOVÁ, D.; NOVOTNÝ, R.

Originální název

Low Energy Cements Prepared from Modified SO3 Doped Clinkers

Anglický název

Low Energy Cements Prepared from Modified SO3 Doped Clinkers

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

Clinkers doped with optimized combinations of SO3 and Li2O or CuO or MgO were synthetized in laboratory furnace at 1350 degrees C. Clinkers were characterized by light and scanning electron microscopy. Chemical and phase composition of clinkers is discussed with respect to early hydration properties of cements. Hydration of cement pastes was monitored by isothermal calorimetry and reaction kinetics correlated with early strengths. Flexural and compressive strengths of cements were determined after 2, 7, 28, 90 and 365 days of hydration according to EN 196 on mortars. At high CuO contents, Cu-rich phases form inclusions in C2S. The limited incorporation of MgO into the structure of clinker phases is represented in the form of inclusions in C3S. Due to formation of Cu(OH)(2), hydration slows down significantly, while Li salts accelerate early hydration. For the studied modified SO3 doped cements, there is a good correlation between heat development during the first 2 days and strength development during 1 year. Proposed four low-energy cements based on SO3 doped clinkers burned at 100 degrees C lower temperature meet the requirement for CEM I strengths.

Anglický abstrakt

Clinkers doped with optimized combinations of SO3 and Li2O or CuO or MgO were synthetized in laboratory furnace at 1350 degrees C. Clinkers were characterized by light and scanning electron microscopy. Chemical and phase composition of clinkers is discussed with respect to early hydration properties of cements. Hydration of cement pastes was monitored by isothermal calorimetry and reaction kinetics correlated with early strengths. Flexural and compressive strengths of cements were determined after 2, 7, 28, 90 and 365 days of hydration according to EN 196 on mortars. At high CuO contents, Cu-rich phases form inclusions in C2S. The limited incorporation of MgO into the structure of clinker phases is represented in the form of inclusions in C3S. Due to formation of Cu(OH)(2), hydration slows down significantly, while Li salts accelerate early hydration. For the studied modified SO3 doped cements, there is a good correlation between heat development during the first 2 days and strength development during 1 year. Proposed four low-energy cements based on SO3 doped clinkers burned at 100 degrees C lower temperature meet the requirement for CEM I strengths.

Klíčová slova

Doped clinker; SO3 activation; Li2O; CuO; MgO; Microstructure; Hydration heat; Strengths

Klíčová slova v angličtině

Doped clinker; SO3 activation; Li2O; CuO; MgO; Microstructure; Hydration heat; Strengths

Autoři

KHONGOVÁ, I.; ZEZULOVÁ, A.; BOHÁČ, M.; STANĚK, T.; KUBÁTOVÁ, D.; NOVOTNÝ, R.

Rok RIV

2023

Vydáno

01.09.2022

Nakladatel

SPRINGER-VERLAG SINGAPORE PTE LTD

Místo

SINGAPORE

ISBN

978-981-16-7160-9

Kniha

Lecture Notes in Civil Engineering

ISSN

2366-2557

Periodikum

Lecture Notes in Civil Engineering

Svazek

203

Číslo

1

Stát

Švýcarská konfederace

Strany od

743

Strany do

751

Strany počet

9

Plný text v Digitální knihovně

http://hdl.handle.net/

BibTex

@inproceedings{BUT179155,
  author="Martin {Boháč} and Theodor {Staněk} and Dana {Kubátová} and Radoslav {Novotný} and Ingrid {Khongová} and Anežka {Zezulová}",
  title="Low Energy Cements Prepared from Modified SO3 Doped Clinkers",
  booktitle="Lecture Notes in Civil Engineering",
  year="2022",
  journal="Lecture Notes in Civil Engineering",
  volume="203",
  number="1",
  pages="743--751",
  publisher="SPRINGER-VERLAG SINGAPORE PTE LTD",
  address="SINGAPORE",
  doi="10.1007/978-981-16-7160-9\{_}75",
  isbn="978-981-16-7160-9",
  issn="2366-2557"
}