Lightweight engineered cementitious composites (ECC)

Title: Lightweight engineered cementitious composites (ECC)
Author(s): S. Wang, V. C. Li
Paper category : conference
Book title: International Workshop High Performance Fiber Reinforced Cement Composites
Editor(s): A. E. Naaman and H. W. Reinhardt
Print-ISBN: 2-912143-38-1
e-ISBN: 2912143799
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 379 - 390
Total Pages: 12
Nb references: 15
Language: English

Abstract: Lightweight concrete with densities between 900 and 1600 kg/m3 has been used in various structural and non-structural applications, offering considerable weight saving. By adding ductility, lightweight ECC can further broaden the applicability. Four approaches to achieving lightweightedness for a Polyvinyl Alcohol (PVA) fiber ECC are explored in this paper, including uses of air-entrainment admixture, polymeric micro-hollow-bubble, natural lightweight aggregates perlite and glass micro-bubbles. Density, uniaxial tensile behavior, and compressive strength of 15 mix designs are examined. The experimental results show that multiple cracking and strain hardening can be achieved by all these approaches; however, tensile and compressive strengths and robustness of strain capacity significantly vary with content and type of lightweight "filler" used. Mixes by adding glass micro-bubbles with controlled size distribution exhibit more superior mechanical performances than other approaches. For example, tensile strength of 4 MPa with strain capacity above 4% is achieved in a lightweight PVA-ECC with 2% fiber volume fraction at a density of 1450 kg/m3, along with a compressive strength of 40 MPa.

Online publication: 2003-04-28
Publication type : abstract_only
Public price (Euros): 0.00