Experimental study on creep and shrinkage of high- performance ultra lightweight cement composite of 60MPa

Kok-Seng Chia, Xuemei Liu, Jat-Yuen Richard Liew and Min-Hong Zhang

Abstract

Creep and shrinkage behaviour of an ultra lightweight cement composite (ULCC) up to 450 days was evaluated in comparison with those of a normal weight aggregate concrete (NWAC) and a lightweight aggregate concrete (LWAC) with similar 28-day compressive strength. The ULCC is characterized by low density < 1500 kg/m3 and high compressive strength about 60 MPa. Autogenous shrinkage increased rapidly in the ULCC at early-age and almost 95% occurred prior to the start of creep test at 28 days. Hence, majority of shrinkage of the ULCC during creep test was drying shrinkage. Total shrinkage of the ULCC during the 450-day creep test was the lowest compared to the NWAC and LWAC. However, corresponding total creep in the ULCC was the highest with high proportion attributed to basic creep (

Key Words

cement composite; concrete; creep coefficient; model; shrinkage; ultra lightweight

Address

Kok-Seng Chia : Nautic Group Pte Ltd, 300 Beach Road #20-06, The Concourse, 199555, Singapore Xuemei Liu : School of Civil Engineering and Built Environment, Queensland University of Technology, 2 George St, Brisbane, QLD, Australia Jat-Yuen Richard Liew and Min-Hong Zhang : Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore

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