Experimental Study on Cementitious Composites Embedded with Organic Microcapsules

Experimental Study on Cementitious Composites Embedded with Organic Microcapsules

Wang, X.
Xing, F.
Zhang, M.
Han, N.
Qian, Z.

Civil Engineering and Geosciences

Structural Engineering

2013-09-16

The recovery behavior for strength and impermeability of cementitious composites embedded with organic microcapsules was investigated in this study. Mortar specimens were formed by mixing the organic microcapsules and a catalyst with cement and sand. The mechanical behaviors of flexural and compression strength were tested. The results showed that strength could increase by up to nine percent with the addition of a small amount of microcapsules and then decrease with an increasing amount of microcapsules. An orthogonal test for investigating the strength recovery rate was designed and implemented for bending and compression using the factors of water/cement ratio, amount of microcapsules, and preloading rate. It is shown that the amount of microcapsules plays a key role in the strength recovery rate. Chloride ion permeability tests were also carried out to investigate the recovery rate and healing effect. The initial damage was obtained by subjecting the specimens to compression. Both the recovery rate and the healing effect were nearly proportional to the amount of microcapsules. The obtained cementitious composites can be seen as self-healing owing to their recovery behavior for both strength and permeability.

self-healing concrete
organic microcapsules
permeability
recovery rate
healing effect

http://resolver.tudelft.nl/uuid:d0c537c0-cf3a-4cd5-bf7e-4215a95a5a5e

https://doi.org/10.3390/ma6094064

MDPI

1996-1944

http://www.mdpi.com/1996-1944/6/9/4064

Materials, 6 (9), 2013

Institutional Repository

journal article

(c) 2013 The Author(s)
Creative Commons 3.0