Title:
High-Early-Strength Engineered Cementitious Composites
Author(s):
Shuxin Wang and Victor C. Li
Publication:
Materials Journal
Volume:
103
Issue:
2
Appears on pages(s):
97-105
Keywords:
fibers; high early strength; strain
DOI:
10.14359/15260
Date:
3/1/2006
Abstract:
Rapid repair and retrofit of existing infrastructures demand durable high-early-strength materials that not only deliver sufficient strength within a few hours of placement but also significantly prolong the maintenance interval. This paper reports a class of newly developed polyvinyl alcohol (PVA) fiber-reinforced high-early-strength engineered cementitious composites (ECC) materials featuring extraordinary ductility. While micromechanics was applied in many aspects of the material design process, emphasis of this paper is put on the tailoring of preexisting flaw size distribution in matrix for high tensile ductility. The resulting high-early-strength ECC materials are capable of delivering a compressive strength of 21 MPa (3.0 ksi) within 4 hours after placement and retaining long-term tensile strain capacity above 2%.