Effect of exposure conditions on self-healing behavior of engineered cementitious composite incorporating limestone powder

In this study, an experimental program is conducted to understand the effect of the limestone powder (LSP) content replaced by silica sand on the composite properties. For this purpose, five different engineered cementitious composite (ECC) mixtures were adopted: ECC mixture with only silica sand (SS) for control purposes and four ECC mixtures in which SS is partially replaced by four levels of replacements (25%, 50%, 75%, and 100% by weight of total SS) of LSP. The properties of ECC mixtures produced were investigated for the ages of 3, 28, and 90 days. It was concluded that the mechanical properties of the ECC mixtures with LSP were in general higher than the reference mixture with only SS for all curing ages. Increase in the LSP content had a positive effect on the performance of the compressive strength, fracture toughness, and flexural strength at the ages of 3 and 28 days while this was not valid at the age of 90 days when compared to the reference mixture. Also, the ductility of the ECC beams strongly depends on the LSP content and specimen age.

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A review: Self-healing in cementitious materials and engineered cementitious composite as a self-healing material

Construction and Building Materials ◽

10.1016/j.conbuildmat.2011.08.086 ◽

2012 ◽

Vol 28 (1) ◽

pp. 571-583 ◽

Cited By ~ 283

Author(s):

Min Wu ◽

Björn Johannesson ◽

Mette Geiker

Keyword(s):

Cementitious Materials ◽

Self Healing ◽

Cementitious Composite ◽

Engineered Cementitious Composite

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A Review on the Use of Engineered Cementitious Composite in Bridges

Materials Science Forum ◽

10.4028/www.scientific.net/msf.860.125 ◽

2016 ◽

Vol 860 ◽

pp. 125-134 ◽

Cited By ~ 2

Author(s):

Abla Krouma ◽

Zubair Imam Syed

Keyword(s):

Low Cost ◽

Steel Corrosion ◽

High Strength ◽

Highway Bridges ◽

Self Healing ◽

Cementitious Composite ◽

Long Term Effects ◽

Engineered Cementitious Composite ◽

Water Permeability Coefficient

Engineered Cementitious Composite (ECC) is a material with high ductility, tensile strength and self-healing more than the standard concrete. Applications of ECC are beneficial due to its long life cycle, high strength, low cost in the long-term, low maintenance and environmentally friendly nature. Properties and hardened behavior of ECC highlights that ECC has a tight crack width development, which increases its ability to resist long-term effects of hot, frost and humid weather. Additionally, it results low water permeability coefficient and high steel corrosion resistance compared to other common alternative materials. One of the promising areas of application for ECC is in highway structures, especially highway bridges. Highway structures suffer constantly from adverse environmental loads and often require frequent repairing or replacing due to cracks; expansion; water and chlorides effects which cause steel corrosion or the slope between the pavement, slab and the support at the end of a bridge. Detailed review on different properties and characteristics of ECC and the current applications of ECC clearly highlights the motivation to enhance the use of ECC for bridge construction. In addition, ECC can be introduced in jointless bridges by putting an ECC link slab instead of the expandable mechanical joint.

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