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author:

Zheng, X. (Zheng, X..) [1] | Lu, H. (Lu, H..) [2] | You, S. (You, S..) [3] | Cheng, K. (Cheng, K..) [4] | Easa, S.M. (Easa, S.M..) [5] | Chen, Z. (Chen, Z..) [6] | Ma, C. (Ma, C..) [7] | Fu, D. (Fu, D..) [8] | Ji, T. (Ji, T..) [9]

Indexed by:

Scopus

Abstract:

This study aims to investigate the effect of pre-wetting lightweight aggregate (LWA) on the tensile creep of alkali-activated slag concrete (AASC) for 14 d. Three replacement rates of natural coarse aggregate with LWA were used in this study, including 0, 50%, and 100%, and the Ordinary Portland cement concretes (OPCCs) mixed with LWAs were considered as control samples. The results showed that the tensile creep of the AASCs was higher than those of OPCCs with the same LWA content. The incorporation of pre-wetting LWA significantly reduced the modified autogenous shrinkage and tensile creep of the AASCs, and the magnitudes were continuously declined with the increase in LWA contents. The early age of 1 d dominated more than 70% of the total tensile creep of the AASCs for 14 d. Furthermore, pre-wetting LWAs had a greater effect on decreasing tensile creep for the AASC system than the OPCC system. Meanwhile, the creep/shrinkage ratio of the AASCs was declined by the addition of pre-wetting LWAs. In addition, the cracking age of the AASC was desirably delayed by adding pre-wetting LWA, and the effect was more noticeable with the increase in LWA contents. © 2022 Elsevier Ltd

Keyword:

Alkali-activated slag concrete Lightweight aggregate Microstructure Tensile creep

Community:

  • [ 1 ] [Zheng, X.]College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002, China
  • [ 2 ] [Lu, H.]College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002, China
  • [ 3 ] [You, S.]College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, 15 Shangxiadian Road, Cangshan District, Fuzhou, 350002, China
  • [ 4 ] [Cheng, K.]Department of Civil Engineering, Fuzhou University, 2 Xueyuan Road, University District, Fuzhou, 350116, China
  • [ 5 ] [Easa, S.M.]Department of Civil Engineering, Ryerson University, 350 Victoria Street, Toronto M5B 2K3, ON, Canada
  • [ 6 ] [Chen, Z.]Fuzhou New District Traffic Construction Co. LTD, 552 Jinshan Road, Cangshan District, Fuzhou, 350002, China
  • [ 7 ] [Ma, C.]CCCC Fuzhou Construction Co. LTD, 190 Beidou Road, Cangshan District, Fuzhou, 350008, China
  • [ 8 ] [Fu, D.]Fuzhou Planning Design and Research Institute Group Co., Ltd, Fuzhou, 350108, China
  • [ 9 ] [Ji, T.]Department of Civil Engineering, Fuzhou University, 2 Xueyuan Road, University District, Fuzhou, 350116, China

Reprint 's Address:

  • [Ji, T.]Department of Civil Engineering, 2 Xueyuan Road, University District, China

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Source :

Construction and Building Materials

ISSN: 0950-0618

Year: 2022

Volume: 357

7 . 4

JCR@2022

7 . 4 0 0

JCR@2023

ESI HC Threshold:91

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 7

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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