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Y. Wang et al.
25.1.1 Self-healing Materials
In recent years, since the degradation of material has been considered as an inevitable
process which is commonly figured out through expensive maintenance cost, some
researchers have gained the inspiration from biological systems and been developing
materials which have the ability to adapt and respond to their environment. Since
2016, there is an ongoing programme of study regarding self-healing concrete and
corresponding cementitious materials being undertaken by researchers at Cardiff,
Bath, Bradford and Cambridge Universities in the UK.
25.1.2 Acoustic Emission
It has been long stated that it is of great importance to monitor the structural safety
of concrete structures. One of the Non-Destructive Testing (NDT) methods used in
recent years for real time monitoring is Acoustic Emission (AE), and it has been
applied for damage detection in infrastructure and civil engineering for decades. The
advantages of AE lie in its sensitivity to damage growth and corresponding changes
occurred inside material which makes it promising for detection and quantification
of damage in real time. In that case, AE is highly capable of monitoring the internal
conditions of concrete structures under load and assisting in improving the efficiency
of self-healing concrete. Associated AE parameters, such as amplitude, rise time,
duration, signal strength and counts, can be extracted from AE waveforms. These
types of parameters have been previously analysed to provide insight of damage
mechanism and failure mode.
This study is trying to address detection of damage evolution both in concrete and
self-healing concrete with focus on the mechanical properties and corresponding AE
responses. The results could be utilized to provide information and guide for the
design and improvements of performance end efficiency of self-healing concrete.
25.2 Materials and Experimental Setup
25.2.1 Preparation of Self-healing Concrete Specimens
Currently there are four kinds of self-healing techniques including: microcapsules
releasing healing agents when damaged, bacterial healing filling cracks with calcium
carbonate, shape memory polymers minimising the crack width after damage, and
vascular flow networks supplying healing agents due to capillary force.
This study aims at studying the application of AE on self-healing concrete based
on using the 2D vascular network in concrete as a system for hosting the self-healing
Y. Wang et al.
25.1.1 Self-healing Materials
In recent years, since the degradation of material has been considered as an inevitable
process which is commonly figured out through expensive maintenance cost, some
researchers have gained the inspiration from biological systems and been developing
materials which have the ability to adapt and respond to their environment. Since
2016, there is an ongoing programme of study regarding self-healing concrete and
corresponding cementitious materials being undertaken by researchers at Cardiff,
Bath, Bradford and Cambridge Universities in the UK.
25.1.2 Acoustic Emission
It has been long stated that it is of great importance to monitor the structural safety
of concrete structures. One of the Non-Destructive Testing (NDT) methods used in
recent years for real time monitoring is Acoustic Emission (AE), and it has been
applied for damage detection in infrastructure and civil engineering for decades. The
advantages of AE lie in its sensitivity to damage growth and corresponding changes
occurred inside material which makes it promising for detection and quantification
of damage in real time. In that case, AE is highly capable of monitoring the internal
conditions of concrete structures under load and assisting in improving the efficiency
of self-healing concrete. Associated AE parameters, such as amplitude, rise time,
duration, signal strength and counts, can be extracted from AE waveforms. These
types of parameters have been previously analysed to provide insight of damage
mechanism and failure mode.
This study is trying to address detection of damage evolution both in concrete and
self-healing concrete with focus on the mechanical properties and corresponding AE
responses. The results could be utilized to provide information and guide for the
design and improvements of performance end efficiency of self-healing concrete.
25.2 Materials and Experimental Setup
25.2.1 Preparation of Self-healing Concrete Specimens
Currently there are four kinds of self-healing techniques including: microcapsules
releasing healing agents when damaged, bacterial healing filling cracks with calcium
carbonate, shape memory polymers minimising the crack width after damage, and
vascular flow networks supplying healing agents due to capillary force.
This study aims at studying the application of AE on self-healing concrete based
on using the 2D vascular network in concrete as a system for hosting the self-healing