Publication result detail

Modified Cement-based Mortars: Crack Initiation and Volume Changes

HAVLÍKOVÁ, I.; BÍLEK, V.; TOPOLÁŘ, L.; ŠIMONOVÁ, H.; SCHMID, P.; KERŠNER, Z.

Original Title

Modified Cement-based Mortars: Crack Initiation and Volume Changes

English Title

Modified Cement-based Mortars: Crack Initiation and Volume Changes

Type

WoS Article

Original Abstract

The aim of this paper was to quantify the crack initiation and volume changes of three types of fine-grain cement-based composites: the reference one including Portland cement only and the other two with the mass fraction 20 % of Portland cement replaced by granulated blast-furnace slag or pulverized-coal fly ash. Half of the specimens from each mixture were cured according to ASTM C1260-94 and ASTM C1567-07, other specimens were cured in water. The length changes were measured during the curing (a test for the risk of the alkali-silica reactivity). Furthermore, a three-point-bending test was performed on these specimens to obtain the fracture parameters, which were determined using a double-K fracture model. It was found that the type of specimen curing has a significant effect on the volume changes and a moderate influence on the elasticity modulus, the crack initiation and fracture-toughness values.

English abstract

The aim of this paper was to quantify the crack initiation and volume changes of three types of fine-grain cement-based composites: the reference one including Portland cement only and the other two with the mass fraction 20 % of Portland cement replaced by granulated blast-furnace slag or pulverized-coal fly ash. Half of the specimens from each mixture were cured according to ASTM C1260-94 and ASTM C1567-07, other specimens were cured in water. The length changes were measured during the curing (a test for the risk of the alkali-silica reactivity). Furthermore, a three-point-bending test was performed on these specimens to obtain the fracture parameters, which were determined using a double-K fracture model. It was found that the type of specimen curing has a significant effect on the volume changes and a moderate influence on the elasticity modulus, the crack initiation and fracture-toughness values.

Keywords

cement-based composite, slag, fly ash, alkali-silica reaction, crack initiation, double-K fracture model

Key words in English

cement-based composite, slag, fly ash, alkali-silica reaction, crack initiation, double-K fracture model

Authors

HAVLÍKOVÁ, I.; BÍLEK, V.; TOPOLÁŘ, L.; ŠIMONOVÁ, H.; SCHMID, P.; KERŠNER, Z.

RIV year

2016

Released

23.07.2015

Publisher

Institute of Metals and Technology

Location

Ljubljana

ISBN

1580-2949

Periodical

Materiali in Tehnologije

Volume

49

Number

4

State

Republic of Slovenia

Pages from

557

Pages to

561

Pages count

5

BibTex

@article{BUT115359,
  author="Ivana {Havlíková} and Vlastimil {Bílek} and Libor {Topolář} and Hana {Šimonová} and Pavel {Schmid} and Zbyněk {Keršner}",
  title="Modified Cement-based Mortars: Crack Initiation and Volume Changes",
  journal="Materiali in Tehnologije",
  year="2015",
  volume="49",
  number="4",
  pages="557--561",
  issn="1580-2949"
}