Influence Of Bentonite And Blast Furnace Slag To The Self Healing Behaviour Of Cracked Cement Paste
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Institusion
Institut Teknologi Sepuluh Nopember
Author
Anam, M. Samsul
Subject
TA440 Concrete--Cracking
Datestamp
2017-10-03 02:29:16
Abstract :
Cracks, caused by shrinkage and external loading faciliates the ingress of aggressive and harmful substance into concrete and reduce the durability of the structures. It is well known that self – healing of cracks can significantly improve the durability of the concrete structure. In this reseach, self healing propertis of the cement paste containing bentonite and blast furnace slag were studied. The self healing properties were evaluated by using 4 parameters, including surface crack width (βindex), crack depth (αindex), tensile strength recovery, and flexural stiffness recovery. In combination with microscopic obervation, a healing process over time was drawn. The result show that bentonite can improve healing properties, in term of surface crack width and crack depth. In the other hand BFS also could also improve self healing properties, in terms of crack depth, direst tensile regain, and flexural stiffnes. Carbonation reaction still to be main mechanism which contribute self healing process, althought continued hydration still occure.
Cracks, caused by shrinkage and external loading faciliates the ingress of aggressive and harmful substance into concrete and reduce the durability of the structures. It is well known that self – healing of cracks can significantly improve the durability of the concrete structure. In this reseach, self healing propertis of the cement paste containing bentonite and blast furnace slag were studied. The self healing properties were evaluated by using 4 parameters, including surface crack width (βindex), crack depth (αindex), tensile strength recovery, and flexural stiffness recovery. In combination with microscopic obervation, a healing process over time was drawn. The result show that bentonite can improve healing properties, in term of surface crack width and crack depth. In the other hand BFS also could also improve self healing properties, in terms of crack depth, direst tensile regain, and flexural stiffnes. Carbonation reaction still to be main mechanism which contribute self healing process, althought continued hydration still occure.
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