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Self-healing concrete by means of microfibres and superabsorbent polymers

Concrete which repairs itself leads to less overall costs


Concrete cracking is in some cases inevitable. Autogenous healing may prove to be useful to limit repair works caused by concrete cracking. Further cement hydration, pozzolanic activity by fly ash and calcium carbonate crystallization will hereby heal the cracks if crack widths are limited, and if sufficient building blocks and water are present. Synthetic microfibres may be used to limit the crack width, leading to strain-hardening cementitious materials. The water can be provided by the use of superabsorbent polymers, which are extracting moisture from the environment. This moisture can be used to promote and stimulate autogenous healing and may lead to a complete regain in mechanical properties. The smart cementitious material with superabsorbent polymers may thus be an excellent material to use in future building applications.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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