Skip to main content Accessibility help

Soluble Silicates as Additives for Self-Sealing and Self-Healing Concrete

  • L. E. Rendon Diaz Miron (a1) and M. E. Lara Magaña (a2)


Tensile strength of concrete is limited and therefore is sensitive to crack formation. Steel reinforcement is added to bear the tensile forces; nonetheless, this does not completely omit crack formation. Repair of cracks in concrete is time-consuming and expensive. Self-sealing and self-healing of cracks upon appearance would therefore be a convenient property. We propose a mechanism to obtain self-repair of the concrete by adding soluble silicates (ASS) which will induce a self-sealing and self-healing process catalyzed by natural periods of wet and dry states of the concrete. Self-sealing approaches prevent the ingress of harsh chemical substances which may deteriorate the concrete matrix. This can be achieved by self-healing of concrete cracks (e.g. further cement hydration, calcium carbonate precipitation) and autonomous healing (e.g. further hydration of partially soluble silicates added as healing agents). The autogenous healing efficiency depends on the amount of deposited reaction products (ASS), its solubility (ratio of calcium to sodium silicate), the availability of water, and the crack width (restricted by adding microfibers). The self-sealing efficiency is generally evaluated by measuring the decrease in water permeability and air flow through the crack. The healing efficiency is usually evaluated by testing concrete´s regain in mechanical properties after crack formation; by reloading the cracked and autonomously healed specimen and comparing the obtained mechanical properties with the original ones. Self-sealing and self-healing of concrete gives a broad perspective and new possibilities to make future concrete structures more durable.



Hide All
1. De Belie, N., Van Tittelboom, K., Snoeck, D. and Wang, J., MRS Proceedings, Volume 1488, (2012).
2. Rendon Diaz Miron, L.E. and Bilba, N., A note on the double hydroxide Na2Ca(OH)4 Revista Kinam, vol. 2, 167168 (1980).
3. Aldea, C., Shah, S. and Karr, A., Materials in Civil Engineering 11 (3), 181187 (1999).
4. Van Tittelboom, K., De Belie, N., Van Loo, D. and Jacobs, P., Cement and Concrete Composites 33 (4), 497505 (2011).
5. Tsukamoto, M. and Woener, J. D., Darmstadt Concrete 6, 123135 (1991).
6. Edvardsen, C., ACI Materials Journal 96 (4), 448454 (1999).
7. Capillary water absorption test, RILEM 25 PEM II-6.


Soluble Silicates as Additives for Self-Sealing and Self-Healing Concrete

  • L. E. Rendon Diaz Miron (a1) and M. E. Lara Magaña (a2)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed