A mix design methodology of slag and fly ash-based alkali-activated paste

Beibei  Sun; Yubo Sun; Guang Ye; Geert De Schutter

doi:10.1016/j.cemconcomp.2021.104368

A mix design methodology of slag and fly ash-based alkali-activated paste

Beibei Sun, Yubo Sun, Guang Ye^*, Geert De Schutter^*

^*Corresponding author for this work

Materials and Environment

Research output: Contribution to journal › Article › Scientific › peer-review

40 Citations (Scopus)

33 Downloads (Pure)

Abstract

In this paper, a series of experiments were conducted to systematically and quantitively explore the effects of control factors on the early age properties, i.e., workability and strength of slag and fly ash-based alkali-activated paste (BFS/FA-AAP). The control factors on the workability (flowability and setting time) of BFS/FA-AAP include the Na₂O/b ratio, the SiO₂/Na₂O ratio, the w/b ratio, and the BFS/b ratio. The control factors on strength (compressive strength and flexural strength) of BFS/FA-AAP further also include the curing condition and the curing age. The results show that a higher BFS/b ratio and Na₂O/b ratio could increase the strength while decreasing the workability. A higher w/b ratio could increase the workability while slightly decreasing the strength. Higher SiO₂/Na₂O ratio increases both strength and workability. Despite that, higher Na₂O/b ratio and SiO₂/Na₂O ratio could hinder the strength development. Sealed curing condition is proved to be a simple but efficient way to assure the steady strength development of BFS/FA-AAP. Although the strength of BFS/FA-AAP could generally stabilize after 90 days, the strength development rate varies with different mix proportions. In addition, a general methodology have been proposed to predict the compressive strength of BFS/FA-AAP and verified with experiments. Finally, a mix design table is proposed for the preliminary design of BFS/FA-AAP according to the principle of satisfying early age requirements.

Original language	English
Article number	104368
Pages (from-to)	1-15
Number of pages	15
Journal	Cement and Concrete Composites
Volume	126
DOIs	https://doi.org/10.1016/j.cemconcomp.2021.104368
Publication status	Published - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Control factors
Flowability
Mix design
Setting time
Slag and fly ash-based alkali-activated materials
Strength

Access to Document

10.1016/j.cemconcomp.2021.104368

1_s2.0_S0958946521004352_mainFinal published version, 11.9 MB

Cite this

@article{87463de309cb4c428261a1e500279d38,

title = "A mix design methodology of slag and fly ash-based alkali-activated paste",

abstract = "In this paper, a series of experiments were conducted to systematically and quantitively explore the effects of control factors on the early age properties, i.e., workability and strength of slag and fly ash-based alkali-activated paste (BFS/FA-AAP). The control factors on the workability (flowability and setting time) of BFS/FA-AAP include the Na2O/b ratio, the SiO2/Na2O ratio, the w/b ratio, and the BFS/b ratio. The control factors on strength (compressive strength and flexural strength) of BFS/FA-AAP further also include the curing condition and the curing age. The results show that a higher BFS/b ratio and Na2O/b ratio could increase the strength while decreasing the workability. A higher w/b ratio could increase the workability while slightly decreasing the strength. Higher SiO2/Na2O ratio increases both strength and workability. Despite that, higher Na2O/b ratio and SiO2/Na2O ratio could hinder the strength development. Sealed curing condition is proved to be a simple but efficient way to assure the steady strength development of BFS/FA-AAP. Although the strength of BFS/FA-AAP could generally stabilize after 90 days, the strength development rate varies with different mix proportions. In addition, a general methodology have been proposed to predict the compressive strength of BFS/FA-AAP and verified with experiments. Finally, a mix design table is proposed for the preliminary design of BFS/FA-AAP according to the principle of satisfying early age requirements.",

keywords = "Control factors, Flowability, Mix design, Setting time, Slag and fly ash-based alkali-activated materials, Strength",

author = "Beibei Sun and Yubo Sun and Guang Ye and {De Schutter}, Geert",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ",

year = "2022",

doi = "10.1016/j.cemconcomp.2021.104368",

language = "English",

volume = "126",

pages = "1--15",

journal = "Cement and Concrete Composites",

issn = "0958-9465",

publisher = "Elsevier",

}

TY - JOUR

T1 - A mix design methodology of slag and fly ash-based alkali-activated paste

AU - Sun, Beibei

AU - Sun, Yubo

AU - Ye, Guang

AU - De Schutter, Geert

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2022

Y1 - 2022

N2 - In this paper, a series of experiments were conducted to systematically and quantitively explore the effects of control factors on the early age properties, i.e., workability and strength of slag and fly ash-based alkali-activated paste (BFS/FA-AAP). The control factors on the workability (flowability and setting time) of BFS/FA-AAP include the Na2O/b ratio, the SiO2/Na2O ratio, the w/b ratio, and the BFS/b ratio. The control factors on strength (compressive strength and flexural strength) of BFS/FA-AAP further also include the curing condition and the curing age. The results show that a higher BFS/b ratio and Na2O/b ratio could increase the strength while decreasing the workability. A higher w/b ratio could increase the workability while slightly decreasing the strength. Higher SiO2/Na2O ratio increases both strength and workability. Despite that, higher Na2O/b ratio and SiO2/Na2O ratio could hinder the strength development. Sealed curing condition is proved to be a simple but efficient way to assure the steady strength development of BFS/FA-AAP. Although the strength of BFS/FA-AAP could generally stabilize after 90 days, the strength development rate varies with different mix proportions. In addition, a general methodology have been proposed to predict the compressive strength of BFS/FA-AAP and verified with experiments. Finally, a mix design table is proposed for the preliminary design of BFS/FA-AAP according to the principle of satisfying early age requirements.

AB - In this paper, a series of experiments were conducted to systematically and quantitively explore the effects of control factors on the early age properties, i.e., workability and strength of slag and fly ash-based alkali-activated paste (BFS/FA-AAP). The control factors on the workability (flowability and setting time) of BFS/FA-AAP include the Na2O/b ratio, the SiO2/Na2O ratio, the w/b ratio, and the BFS/b ratio. The control factors on strength (compressive strength and flexural strength) of BFS/FA-AAP further also include the curing condition and the curing age. The results show that a higher BFS/b ratio and Na2O/b ratio could increase the strength while decreasing the workability. A higher w/b ratio could increase the workability while slightly decreasing the strength. Higher SiO2/Na2O ratio increases both strength and workability. Despite that, higher Na2O/b ratio and SiO2/Na2O ratio could hinder the strength development. Sealed curing condition is proved to be a simple but efficient way to assure the steady strength development of BFS/FA-AAP. Although the strength of BFS/FA-AAP could generally stabilize after 90 days, the strength development rate varies with different mix proportions. In addition, a general methodology have been proposed to predict the compressive strength of BFS/FA-AAP and verified with experiments. Finally, a mix design table is proposed for the preliminary design of BFS/FA-AAP according to the principle of satisfying early age requirements.

KW - Control factors

KW - Flowability

KW - Mix design

KW - Setting time

KW - Slag and fly ash-based alkali-activated materials

KW - Strength

UR - http://www.scopus.com/inward/record.url?scp=85120618232&partnerID=8YFLogxK

U2 - 10.1016/j.cemconcomp.2021.104368

DO - 10.1016/j.cemconcomp.2021.104368

M3 - Article

AN - SCOPUS:85120618232

SN - 0958-9465

VL - 126

SP - 1

EP - 15

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

M1 - 104368

ER -

A mix design methodology of slag and fly ash-based alkali-activated paste

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this