Influence of aggregate pre-wetting and fly ash on mechanical properties of lightweight concrete

T. Y. Lo; H. Z. Cui; Z. G. Li

doi:10.1016/j.wasman.2003.06.003

Influence of aggregate pre-wetting and fly ash on mechanical properties of lightweight concrete

T. Y. Lo, H. Z. Cui, Z. G. Li

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

150 Citations (Scopus)

Abstract

This study has examined the mechanical properties of lightweight aggregate concrete with a density of 1800 kg/m³. The effects of the following parameters on the concrete properties have been analyzed: the pre-wetting time of the lightweight aggregate and the percentage of pulverized fly ash used as cementitious replacement material. The strength of the lightweight aggregate was found to be the primary factor controlling the strength of high-strength lightweight concrete. An increase in the cementitious content from 420 to 450 kg/m³ does not significantly increase the strength of lightweight aggregate concrete. The relationship between the flexural and compressive strength at 28 days can be represented by the equation f_r=0. 69√f_ck. The elastic modulus was found to be much lower than that of normal weight concrete, ranging from 15.0 to 20.3 GPa. The addition of PFA increases the slump and density of lightweight aggregate concrete. © 2003 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	333-338
Journal	Waste Management
Volume	24
Issue number	4
DOIs	https://doi.org/10.1016/j.wasman.2003.06.003
Publication status	Published - 2004

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@article{4889f1d5014a464989593a7e2f89cff9,

title = "Influence of aggregate pre-wetting and fly ash on mechanical properties of lightweight concrete",

abstract = "This study has examined the mechanical properties of lightweight aggregate concrete with a density of 1800 kg/m3. The effects of the following parameters on the concrete properties have been analyzed: the pre-wetting time of the lightweight aggregate and the percentage of pulverized fly ash used as cementitious replacement material. The strength of the lightweight aggregate was found to be the primary factor controlling the strength of high-strength lightweight concrete. An increase in the cementitious content from 420 to 450 kg/m3 does not significantly increase the strength of lightweight aggregate concrete. The relationship between the flexural and compressive strength at 28 days can be represented by the equation fr=0. 69√fck. The elastic modulus was found to be much lower than that of normal weight concrete, ranging from 15.0 to 20.3 GPa. The addition of PFA increases the slump and density of lightweight aggregate concrete. {\textcopyright} 2003 Elsevier Ltd. All rights reserved.",

author = "Lo, {T. Y.} and Cui, {H. Z.} and Li, {Z. G.}",

year = "2004",

doi = "10.1016/j.wasman.2003.06.003",

language = "English",

volume = "24",

pages = "333--338",

journal = "Waste Management",

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publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Influence of aggregate pre-wetting and fly ash on mechanical properties of lightweight concrete

AU - Lo, T. Y.

AU - Cui, H. Z.

AU - Li, Z. G.

PY - 2004

Y1 - 2004

N2 - This study has examined the mechanical properties of lightweight aggregate concrete with a density of 1800 kg/m3. The effects of the following parameters on the concrete properties have been analyzed: the pre-wetting time of the lightweight aggregate and the percentage of pulverized fly ash used as cementitious replacement material. The strength of the lightweight aggregate was found to be the primary factor controlling the strength of high-strength lightweight concrete. An increase in the cementitious content from 420 to 450 kg/m3 does not significantly increase the strength of lightweight aggregate concrete. The relationship between the flexural and compressive strength at 28 days can be represented by the equation fr=0. 69√fck. The elastic modulus was found to be much lower than that of normal weight concrete, ranging from 15.0 to 20.3 GPa. The addition of PFA increases the slump and density of lightweight aggregate concrete. © 2003 Elsevier Ltd. All rights reserved.

AB - This study has examined the mechanical properties of lightweight aggregate concrete with a density of 1800 kg/m3. The effects of the following parameters on the concrete properties have been analyzed: the pre-wetting time of the lightweight aggregate and the percentage of pulverized fly ash used as cementitious replacement material. The strength of the lightweight aggregate was found to be the primary factor controlling the strength of high-strength lightweight concrete. An increase in the cementitious content from 420 to 450 kg/m3 does not significantly increase the strength of lightweight aggregate concrete. The relationship between the flexural and compressive strength at 28 days can be represented by the equation fr=0. 69√fck. The elastic modulus was found to be much lower than that of normal weight concrete, ranging from 15.0 to 20.3 GPa. The addition of PFA increases the slump and density of lightweight aggregate concrete. © 2003 Elsevier Ltd. All rights reserved.

UR - http://www.scopus.com/inward/record.url?scp=1842816583&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-1842816583&origin=recordpage

U2 - 10.1016/j.wasman.2003.06.003

DO - 10.1016/j.wasman.2003.06.003

M3 - RGC 21 - Publication in refereed journal

C2 - 15081059

SN - 0956-053X

VL - 24

SP - 333

EP - 338

JO - Waste Management

JF - Waste Management

IS - 4

ER -

Influence of aggregate pre-wetting and fly ash on mechanical properties of lightweight concrete

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