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Open AccessArticle

Self-Sealing Cementitious Materials by Using Water-Swelling Rubber Particles

by Leyang Lv 1,2,*, Erik Schlangen 1 and Feng Xing 2
Micromechanics Laboratory (MICROLAB), Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands
Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, School of Civil Engineering, Shenzhen University, Shenzhen 518060, China
Author to whom correspondence should be addressed.
Materials 2017, 10(8), 979;
Received: 25 July 2017 / Revised: 15 August 2017 / Accepted: 18 August 2017 / Published: 22 August 2017
(This article belongs to the Special Issue Recent Advances in Smart Materials for the Built Environment)
Water ingress into cracked concrete structures is a serious problem, as it can cause leakage and reinforcement corrosion and thus reduce functionality and safety of the structures. In this study, the application of water-swelling rubber particles for providing the cracked concrete a self-sealing function was developed. The feasibility of applying water-swelling rubber particles and the influence of incorporating water-swelling rubber particles on the mechanical properties of concrete was investigated. The self-sealing efficiency of water-swelling rubber particles with different content and particle size was quantified through a permeability test. The sealing effect of the water swelling rubber particles was monitored by X-ray computed tomography. The experimental results show that, by using 6% of these water swelling rubber particles as a replacement of aggregates in concrete, up to 64% and 61% decrease of water permeability was realized for 0.7 mm and 1.0 mm cracks. Furthermore, when the concrete cracks, the water swelling rubber particles can act as a crack bridging filler, preventing the crack from fully separating the specimens in two pieces. View Full-Text
Keywords: water swelling rubber; self-sealing; cementitious materials; bridging effect water swelling rubber; self-sealing; cementitious materials; bridging effect
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MDPI and ACS Style

Lv, L.; Schlangen, E.; Xing, F. Self-Sealing Cementitious Materials by Using Water-Swelling Rubber Particles. Materials 2017, 10, 979.

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