Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Experimental and numerical investigation of creep in lightweight aggregate concrete prepared from scoria and pumice aggregates

Document Type : Original Article

Author
ALIREZA ENTEZARI
Department of Civil Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
10.22065/jsce.2024.426713.3282
Abstract
Creep and drying shrinkage are two time-dependent features of concrete. In this study, the creep in four types of lightweight aggregate concrete (LWAC) made from scoria and pumice aggregates is examined. The strain due to the creep of LWAC is measured over a course of one year based on ASTM C512 standard. For a numerical assessment of creep, experimental findings are simulated in ABAQUS and the obtained outputs are compared with empirical results and proposed equations in ACI and CEB regulations. Analysis of empirical and numerical results shows that the long-term concrete behaviour depends on aggregate type, concrete compressive strength and applied stress on the samples. The comparison of the creep-induced strain between this type of concrete and ACI and CEB regulations indicates that during one year, the relationship proposed by ACI is consistent with concrete S1 and CEB with concrete P2, and after 365 days age, the relationship proposed by ACI is about %14 less than S1 and the relationship proposed by CEB is about %7 less than P2. The one-year study of LWAC aided by ABAQUS clarifies by defining appropriate parameters with experimental results in ABAQUS, the analytical long-term creep strain of concrete will be in good agreement with the experimental results.
Keywords
Scoria
Lightweight concrete
Pumice
Lightweight aggregate
Creep

Subjects

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  • Receive Date 25 December 2023
  • Revise Date 10 April 2024
  • Accept Date 27 August 2024