Recycling and reuse of reactive MgO cements: A feasibility study

C Sonat; C. H. Lim; M Liska; C Unluer

doi:10.1016/j.conbuildmat.2017.09.068

Recycling and reuse of reactive MgO cements: A feasibility study

C Sonat, C. H. Lim, M Liska, C Unluer

Civil Engineering and Management

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

Abstract

This study investigated the recycling potential of carbonated reactive MgO cement (RMC)-based concrete systems. Calcination conditions controlled the performance of recycled samples, which were fully decomposed at 700 °C. Recycled samples demonstrated 15–20% lower strengths than original samples, attributed to changes in MgO reactivity, aggregate properties and interaction between aggregates-cement paste. Robustness of the recycling process was demonstrated via five repetitive calcination cycles applied on a single batch. Successful separation of aggregates from the surrounding cement paste before the recycling process could resolve issues associated with performance and lower the total energy requirement by only subjecting the cement paste to calcination.

Original language	English
Pages (from-to)	172-181
Number of pages	10
Journal	Construction and Building Materials
Volume	157
Early online date	22 Sept 2017
DOIs	https://doi.org/10.1016/j.conbuildmat.2017.09.068
Publication status	Published - 30 Dec 2017

Keywords

Compressive strength
reactive MgO
recycling
reuse
thermal decomposition

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.conbuildmat.2017.09.068

Cite this

@article{dc6ce608dee243f0987cf5d432b1e283,

title = "Recycling and reuse of reactive MgO cements: A feasibility study",

abstract = "This study investigated the recycling potential of carbonated reactive MgO cement (RMC)-based concrete systems. Calcination conditions controlled the performance of recycled samples, which were fully decomposed at 700 °C. Recycled samples demonstrated 15–20% lower strengths than original samples, attributed to changes in MgO reactivity, aggregate properties and interaction between aggregates-cement paste. Robustness of the recycling process was demonstrated via five repetitive calcination cycles applied on a single batch. Successful separation of aggregates from the surrounding cement paste before the recycling process could resolve issues associated with performance and lower the total energy requirement by only subjecting the cement paste to calcination.",

keywords = "Compressive strength, reactive MgO, recycling, reuse, thermal decomposition",

author = "C Sonat and Lim, {C. H.} and M Liska and C Unluer",

year = "2017",

month = dec,

day = "30",

doi = "10.1016/j.conbuildmat.2017.09.068",

language = "English",

volume = "157",

pages = "172--181",

journal = "Construction and Building Materials",

issn = "0950-0618",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Recycling and reuse of reactive MgO cements

T2 - A feasibility study

AU - Sonat, C

AU - Lim, C. H.

AU - Liska, M

AU - Unluer, C

PY - 2017/12/30

Y1 - 2017/12/30

N2 - This study investigated the recycling potential of carbonated reactive MgO cement (RMC)-based concrete systems. Calcination conditions controlled the performance of recycled samples, which were fully decomposed at 700 °C. Recycled samples demonstrated 15–20% lower strengths than original samples, attributed to changes in MgO reactivity, aggregate properties and interaction between aggregates-cement paste. Robustness of the recycling process was demonstrated via five repetitive calcination cycles applied on a single batch. Successful separation of aggregates from the surrounding cement paste before the recycling process could resolve issues associated with performance and lower the total energy requirement by only subjecting the cement paste to calcination.

AB - This study investigated the recycling potential of carbonated reactive MgO cement (RMC)-based concrete systems. Calcination conditions controlled the performance of recycled samples, which were fully decomposed at 700 °C. Recycled samples demonstrated 15–20% lower strengths than original samples, attributed to changes in MgO reactivity, aggregate properties and interaction between aggregates-cement paste. Robustness of the recycling process was demonstrated via five repetitive calcination cycles applied on a single batch. Successful separation of aggregates from the surrounding cement paste before the recycling process could resolve issues associated with performance and lower the total energy requirement by only subjecting the cement paste to calcination.

KW - Compressive strength

KW - reactive MgO

KW - recycling

KW - reuse

KW - thermal decomposition

UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=pure_starter&SrcAuth=WosAPI&KeyUT=WOS:000414106200018&DestLinkType=FullRecord&DestApp=WOS

U2 - 10.1016/j.conbuildmat.2017.09.068

DO - 10.1016/j.conbuildmat.2017.09.068

M3 - Article

SN - 0950-0618

VL - 157

SP - 172

EP - 181

JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

Recycling and reuse of reactive MgO cements: A feasibility study

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this