Influence of curing condition and precracking time on the self-healing behavior of Engineered Cementitious Composites

2010 ◽  
Vol 32 (9) ◽  
pp. 686-693 ◽  
Author(s):  
S.Z. Qian ◽  
J. Zhou ◽  
E. Schlangen
Keyword(s):  
The Self ◽  
Cementitious Composites ◽  
Self Healing ◽  
Engineered Cementitious Composites ◽  
Curing Condition

scholarly journals Study of the Self-Healing Performance of Semi-Flexible Pavement Materials Grouted with Engineered Cementitious Composites Mortar based on a Non-Standard Test

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3488 ◽  
Author(s):  
Cai ◽  
Huang ◽  
Wu
Keyword(s):  
Flexural Strength ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Flexible Pavement ◽  
Standard Test ◽  
The Self ◽  
Cementitious Composites ◽  
Self Healing ◽  
High Temperature Stability ◽  
Engineered Cementitious Composites

Semi-flexible pavement (SFP) materials, with their characteristics of good high temperature stability, strong durability, and lower cost, are suitable for heavy-duty roads, but their cracking problem has hindered the development and popularization of this kind of pavement to a certain extent. In this study, engineered cementitious composites (ECC) were used to form ECC-SFP materials. The self-healing properties of ECC-SFP materials with three kinds of voids of matrix asphalt mixtures were studied. The test results showed that the fluidity and strength of the ECC mortars met the specification requirements when the water–cement ratio was 0.23 and the ECC fiber dosage was 1–2%. The flexural strength of ECC mortar is better than that of ordinary mortar. The higher the ECC fiber dosage, the higher the flexural strength. Increasing the void of the matrix asphalt mixture and the amount of ECC mortar increased the toughness of the ECC-SFP material, which was seen as an increase of the flow value. Curing conditions are key factor affecting the self-healing properties of ECC mortar and ECC-SFP materials. The self-healing effect of materials in 60 °C water is the best. When an ECC fiber dosage of 1% was used, the HImor of ECC mortar and HImix of ECC-SFP material were 27.5% and 24.8%, respectively. With the addition of ECC material, ECC-SFP material achieved a certain degree of self-healing, but this still needs to be further optimized. Studies of grouting process optimization and increasing the ECC fiber dosage are feasible directions to explore in order to improve the self-healing properties of ECC-SFP materials in the future.

scholarly journals Effect of curing age on the self-sensing behavior of carbon-based engineered cementitious composites (ECC) under monotonic flexural loading scenario

2018 ◽  
Vol 162 ◽  
pp. 01034
Author(s):  
Ali Majeed Al-Dahawi
Keyword(s):  
Carbon Fibers ◽  
The Self ◽  
Cementitious Composites ◽  
Conductive Network ◽  
Engineered Cementitious Composites ◽  
Electrically Conductive ◽  
Conductive Material ◽  
Flexural Loading ◽  
Curing Age ◽  
Carbon Based

The potential effects of curing age on the self-sensing (piezoresistivity) capability of carbon-based Engineered Cementitious Composites (ECC) specimens are under focus in the present study. This non-structural feature can be regarded as one of the best solutions for continuously monitoring of infrastructures in terms of damage and deformations. Carbon fibers which are a micro-scale electrically conductive material were added to the ECC matrix and well dispersed to create the electrically conductive network. This network is responsible for sensing the applied loads on the prismatic specimens. The self-sensing behavior of electrically conductive prismatic specimens under four-point monotonic flexural loading was investigated and compared with dielectric ECC specimens at four ages of curing (7, 28, 90 and 180 days). The results showed that the developed multifunctional cementitious composites can sense the changes in the applied flexural stresses and the resultant mid-span deflection along the adopted curing ages with an improvement in the later ages.

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