Enhancing the performance of lightweight high-performance concrete through an alternative pre-wetting method for lightweight aggregates using simulated cement pore solution

Peiyuan Chen; Weibo Tan; Jian Xin Lu; Yanjie Sun; Chi Sun Poon

doi:10.1016/j.conbuildmat.2023.134024

Enhancing the performance of lightweight high-performance concrete through an alternative pre-wetting method for lightweight aggregates using simulated cement pore solution

Peiyuan Chen
, Weibo Tan
, Jian Xin Lu^*
, Yanjie Sun
, Chi Sun Poon

^*Corresponding author for this work

Anhui University of Science and Technology
Hong Kong Polytechnic University

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

15 Scopus citations

Abstract

Lightweight aggregates (LWAs) are typically pre-wetted to prepare lightweight concrete. However, the incorporation of pre-wetted LWAs by water, may dilute the pore solutions of the cement matrix surrounding the LWAs during the process of internal curing. To this end, this paper proposes an alternative pre-wetting method for LWAs using simulated cement pore solutions (saturated Ca(OH)₂ or real cement solution) instead of water. The effects of LWAs pre-wetted by various agents on the performance of lightweight high-performance concrete (LW-HPC) were investigated and compared. Experimental results confirmed that water released from LWAs diluted the pore solutions of cement in LW-HPCs. By using cement solution and Ca(OH)₂ solution, the compressive strengths of LW-HPCs were respectively increased by 41.7% and 28.2% at 3d, and 11.6% and 3.2% at 28d compared with LWAs pre-wetted by water only. Among the three pre-wetting agents, the saturated cement solution was found to be the optimal one for promoting the hydration of cement, elastic modulus of the interfacial transition zone, and compressive strength.

Original language	English
Article number	134024
Journal	Construction and Building Materials
Volume	409
DOIs	https://doi.org/10.1016/j.conbuildmat.2023.134024
State	Published - 15 Dec 2023
Externally published	Yes

Keywords

Lightweight aggregates
Lightweight high-performance concrete
Micro-mechanical properties
Pore solution
Pore structure

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10.1016/j.conbuildmat.2023.134024

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@article{9f69c5f5eb8e4ebabdb8913a1490dcf8,

title = "Enhancing the performance of lightweight high-performance concrete through an alternative pre-wetting method for lightweight aggregates using simulated cement pore solution",

abstract = "Lightweight aggregates (LWAs) are typically pre-wetted to prepare lightweight concrete. However, the incorporation of pre-wetted LWAs by water, may dilute the pore solutions of the cement matrix surrounding the LWAs during the process of internal curing. To this end, this paper proposes an alternative pre-wetting method for LWAs using simulated cement pore solutions (saturated Ca(OH)2 or real cement solution) instead of water. The effects of LWAs pre-wetted by various agents on the performance of lightweight high-performance concrete (LW-HPC) were investigated and compared. Experimental results confirmed that water released from LWAs diluted the pore solutions of cement in LW-HPCs. By using cement solution and Ca(OH)2 solution, the compressive strengths of LW-HPCs were respectively increased by 41.7\% and 28.2\% at 3d, and 11.6\% and 3.2\% at 28d compared with LWAs pre-wetted by water only. Among the three pre-wetting agents, the saturated cement solution was found to be the optimal one for promoting the hydration of cement, elastic modulus of the interfacial transition zone, and compressive strength.",

keywords = "Lightweight aggregates, Lightweight high-performance concrete, Micro-mechanical properties, Pore solution, Pore structure",

author = "Peiyuan Chen and Weibo Tan and Lu, \{Jian Xin\} and Yanjie Sun and Poon, \{Chi Sun\}",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = dec,

day = "15",

doi = "10.1016/j.conbuildmat.2023.134024",

language = "英语",

volume = "409",

journal = "Construction and Building Materials",

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T1 - Enhancing the performance of lightweight high-performance concrete through an alternative pre-wetting method for lightweight aggregates using simulated cement pore solution

AU - Chen, Peiyuan

AU - Tan, Weibo

AU - Lu, Jian Xin

AU - Sun, Yanjie

AU - Poon, Chi Sun

PY - 2023/12/15

Y1 - 2023/12/15

N2 - Lightweight aggregates (LWAs) are typically pre-wetted to prepare lightweight concrete. However, the incorporation of pre-wetted LWAs by water, may dilute the pore solutions of the cement matrix surrounding the LWAs during the process of internal curing. To this end, this paper proposes an alternative pre-wetting method for LWAs using simulated cement pore solutions (saturated Ca(OH)2 or real cement solution) instead of water. The effects of LWAs pre-wetted by various agents on the performance of lightweight high-performance concrete (LW-HPC) were investigated and compared. Experimental results confirmed that water released from LWAs diluted the pore solutions of cement in LW-HPCs. By using cement solution and Ca(OH)2 solution, the compressive strengths of LW-HPCs were respectively increased by 41.7% and 28.2% at 3d, and 11.6% and 3.2% at 28d compared with LWAs pre-wetted by water only. Among the three pre-wetting agents, the saturated cement solution was found to be the optimal one for promoting the hydration of cement, elastic modulus of the interfacial transition zone, and compressive strength.

AB - Lightweight aggregates (LWAs) are typically pre-wetted to prepare lightweight concrete. However, the incorporation of pre-wetted LWAs by water, may dilute the pore solutions of the cement matrix surrounding the LWAs during the process of internal curing. To this end, this paper proposes an alternative pre-wetting method for LWAs using simulated cement pore solutions (saturated Ca(OH)2 or real cement solution) instead of water. The effects of LWAs pre-wetted by various agents on the performance of lightweight high-performance concrete (LW-HPC) were investigated and compared. Experimental results confirmed that water released from LWAs diluted the pore solutions of cement in LW-HPCs. By using cement solution and Ca(OH)2 solution, the compressive strengths of LW-HPCs were respectively increased by 41.7% and 28.2% at 3d, and 11.6% and 3.2% at 28d compared with LWAs pre-wetted by water only. Among the three pre-wetting agents, the saturated cement solution was found to be the optimal one for promoting the hydration of cement, elastic modulus of the interfacial transition zone, and compressive strength.

KW - Lightweight aggregates

KW - Lightweight high-performance concrete

KW - Micro-mechanical properties

KW - Pore solution

KW - Pore structure

UR - https://www.scopus.com/pages/publications/85175701773

U2 - 10.1016/j.conbuildmat.2023.134024

DO - 10.1016/j.conbuildmat.2023.134024

M3 - 文章

AN - SCOPUS:85175701773

SN - 0950-0618

VL - 409

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 134024

ER -

Enhancing the performance of lightweight high-performance concrete through an alternative pre-wetting method for lightweight aggregates using simulated cement pore solution

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Keywords

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