A GENERAL REINFORCEMENT DEVELOPED TO CHANGE HYDRAULIC AND ALINITE INORGANIC MATERIALS INTO ULTRA-HIGH DUCTILE COMPOSITE

Author(s): Yichao Wang, Jiangtao Yu and Qingfeng Xu
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference on UHPC Materials and Structures (UHPC2018-China)
Editor(s): Caijun Shi and Baochun Chen
ISBN: 978-2-35158-219-0
e-ISBN: 978-2-35158-220-6
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 581-589
Total Pages: 9
Language : English

Abstract: The conventional Engineered cementitious composites (ECC), which are known for their
exceeding tensile deformability, are produced with Portland-cement (PC) based materials.
Based on micromechanical design theory and using specially treated polyethylene (PE) fibers,
the authors succeeded in developing ECCs composed with different types of cement-based
materials, i.e., Sulphate Aluminum Cement (SAC), Magnesium Oxychloride Cement (MOC)
and gypsum (GS). The authors introduce the mixture proportions of SAC based, MOC based
and GS based ECC, as well as that of PC-ECC. The test results indicated that all four types of
composites exhibited outstanding strain hardening behavior and saturated multiple cracking
properties with the maximal crack width less than 100 μm under increasing tensile loadings.
The averaged tensile strain capacity of the tested PC-ECC, SAC-ECC, MOC-ECC, and GS-
ECC were 11.68%, 5.70%, 5.88%, 5.34%, corresponding to the peak tensile stress 5.70 MPa,
5.72 MPa, 6.12 MPa, and 3.69 MPa, respectively. Additionally, the test results showed that
the compressive strength of PC-ECC, SAC-ECC, MOC-ECC, and GY-ECC were 65.86 MPa,
36.84 MPa, 27.47 MPa and 12.46 MPa. Meanwhile, when the compressive strength exceeded
the peak, all four types of composites exhibited superior compressive deformability. This
study reveals that the specially treated PE fibers has the possibility of becoming a general
reinforcement for improving some hydraulic and alinite inorganic materials by changing their
brittleness to high tensile deformability.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00