Waste glass as binder in alkali activated slag–fly ash mortars

Gang Liu (Corresponding author), Miruna Florea, Jos Brouwers

Research output: Contribution to journalArticleAcademicpeer-review

4 Downloads (Pure)

Abstract

This paper illustrates the application of waste glass powder as part of the binder in slag-fly ash systems activated by NaOH and NaOH/Na2CO3 activators. To evaluate the reaction kinetics, reaction products, mechanical properties, and durability performance of glass powder modified alkali activated slag-fly ash systems, calorimetry test, X-ray diffraction, FTIR, strength test, drying shrinkage tests, and carbonation test were conducted. From the isothermal calorimeter results, glass powder shows a higher reactivity compared to fly ash but still lower than slag. The reaction products of glass power modified samples exhibit an enhancement of polymerization degree of Si-O-T, observed in FTIR. As a consequence, higher drying shrinkage exists in glass modified mortars. The mechanical performance of different samples is mostly controlled by the Ca/Si of dry mixtures and activator type. After the slag-fly ash binder system was modified by the waste glass, a significant enhancement of resistance to carbonation was identified, especially for NaOH/Na2CO3 activated mortars, which show an increase of 300% on the carbonation resistance ability compared to the reference sample. The Na/(Si+Al) ratio of dry mixtures exhibits a positive correlation with carbonation resistance.
Original languageEnglish
Article number101
Number of pages12
JournalMaterials and Structures
Volume52
Issue number5
DOIs
Publication statusPublished - 1 Oct 2019

Fingerprint

Ashes
Alkalies
Mortar
Coal Ash
Binders
Carbonation
Fly ash
Glass
Slags
Powders
Reaction products
Drying
Calorimetry
Calorimeters
Reaction kinetics
Durability
Polymerization
X ray diffraction
Mechanical properties

Keywords

  • Alkali activation
  • Carbonation
  • Reaction kinetics
  • Slag–fly ash binder
  • Waste glass

Cite this

@article{71bcb072c2d14b18b55ae8ce17fd9030,
title = "Waste glass as binder in alkali activated slag–fly ash mortars",
abstract = "This paper illustrates the application of waste glass powder as part of the binder in slag-fly ash systems activated by NaOH and NaOH/Na2CO3 activators. To evaluate the reaction kinetics, reaction products, mechanical properties, and durability performance of glass powder modified alkali activated slag-fly ash systems, calorimetry test, X-ray diffraction, FTIR, strength test, drying shrinkage tests, and carbonation test were conducted. From the isothermal calorimeter results, glass powder shows a higher reactivity compared to fly ash but still lower than slag. The reaction products of glass power modified samples exhibit an enhancement of polymerization degree of Si-O-T, observed in FTIR. As a consequence, higher drying shrinkage exists in glass modified mortars. The mechanical performance of different samples is mostly controlled by the Ca/Si of dry mixtures and activator type. After the slag-fly ash binder system was modified by the waste glass, a significant enhancement of resistance to carbonation was identified, especially for NaOH/Na2CO3 activated mortars, which show an increase of 300{\%} on the carbonation resistance ability compared to the reference sample. The Na/(Si+Al) ratio of dry mixtures exhibits a positive correlation with carbonation resistance.",
keywords = "Alkali activation, Carbonation, Reaction kinetics, Slag–fly ash binder, Waste glass",
author = "Gang Liu and Miruna Florea and Jos Brouwers",
year = "2019",
month = "10",
day = "1",
doi = "10.1617/s11527-019-1404-3",
language = "English",
volume = "52",
journal = "Materials and Structures",
issn = "1359-5997",
publisher = "Springer",
number = "5",

}

Waste glass as binder in alkali activated slag–fly ash mortars. / Liu, Gang (Corresponding author); Florea, Miruna; Brouwers, Jos.

In: Materials and Structures, Vol. 52, No. 5, 101, 01.10.2019.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Waste glass as binder in alkali activated slag–fly ash mortars

AU - Liu, Gang

AU - Florea, Miruna

AU - Brouwers, Jos

PY - 2019/10/1

Y1 - 2019/10/1

N2 - This paper illustrates the application of waste glass powder as part of the binder in slag-fly ash systems activated by NaOH and NaOH/Na2CO3 activators. To evaluate the reaction kinetics, reaction products, mechanical properties, and durability performance of glass powder modified alkali activated slag-fly ash systems, calorimetry test, X-ray diffraction, FTIR, strength test, drying shrinkage tests, and carbonation test were conducted. From the isothermal calorimeter results, glass powder shows a higher reactivity compared to fly ash but still lower than slag. The reaction products of glass power modified samples exhibit an enhancement of polymerization degree of Si-O-T, observed in FTIR. As a consequence, higher drying shrinkage exists in glass modified mortars. The mechanical performance of different samples is mostly controlled by the Ca/Si of dry mixtures and activator type. After the slag-fly ash binder system was modified by the waste glass, a significant enhancement of resistance to carbonation was identified, especially for NaOH/Na2CO3 activated mortars, which show an increase of 300% on the carbonation resistance ability compared to the reference sample. The Na/(Si+Al) ratio of dry mixtures exhibits a positive correlation with carbonation resistance.

AB - This paper illustrates the application of waste glass powder as part of the binder in slag-fly ash systems activated by NaOH and NaOH/Na2CO3 activators. To evaluate the reaction kinetics, reaction products, mechanical properties, and durability performance of glass powder modified alkali activated slag-fly ash systems, calorimetry test, X-ray diffraction, FTIR, strength test, drying shrinkage tests, and carbonation test were conducted. From the isothermal calorimeter results, glass powder shows a higher reactivity compared to fly ash but still lower than slag. The reaction products of glass power modified samples exhibit an enhancement of polymerization degree of Si-O-T, observed in FTIR. As a consequence, higher drying shrinkage exists in glass modified mortars. The mechanical performance of different samples is mostly controlled by the Ca/Si of dry mixtures and activator type. After the slag-fly ash binder system was modified by the waste glass, a significant enhancement of resistance to carbonation was identified, especially for NaOH/Na2CO3 activated mortars, which show an increase of 300% on the carbonation resistance ability compared to the reference sample. The Na/(Si+Al) ratio of dry mixtures exhibits a positive correlation with carbonation resistance.

KW - Alkali activation

KW - Carbonation

KW - Reaction kinetics

KW - Slag–fly ash binder

KW - Waste glass

UR - http://www.scopus.com/inward/record.url?scp=85073671207&partnerID=8YFLogxK

U2 - 10.1617/s11527-019-1404-3

DO - 10.1617/s11527-019-1404-3

M3 - Article

VL - 52

JO - Materials and Structures

JF - Materials and Structures

SN - 1359-5997

IS - 5

M1 - 101

ER -