Title
Self-healing behavior of strain hardening cementitious composites incorporating local waste materials
Author
Qian, S.
Zhou, J.
de Rooij, M.R.
Schlangen, E.
Ye, G.
van Breugel, K.
TNO Bouw en Ondergrond
Publication year
2009
Abstract
The self-healing behavior of a series of pre-cracked fiber reinforced strain hardening cementitious composites incorporating blast furnace slag (BFS) and limestone powder (LP) with relatively high water/binder ratio is investigated in this paper, focusing on the recovery of its deflection capacity. Four-point bending tests are used to precrack the beam at 28 days. For specimens submerged in water the deflection capacity can recover about 65-105% from virgin specimens, which is significantly higher compared with specimens cured in air. Similar conclusion applies to the stiffness recovery in water cured specimens. The observations under ESEM and XEDS confirmed that the microcracks in the specimens submerged in water were healed with significant amount of calcium carbonate, very likely due to the continuous hydration of cementitious materials. The self-healing cementitious composites developed in this research can potentially reduce or even eliminate the maintenance needs of civil infrastructure, especially when repeatable high deformation capacity is desirable, e.g. bridge deck link slabs and jointless pavements. © 2009 Elsevier Ltd. All rights reserved.
Subject
Architecture and Building
Blast furnace slag
Deflection capacity
Limestone powder
Self-healing behavior
Stiffness recovery
Strain hardening cementitious composites (SHCC)
Blast furnace slag
Blast furnace slags
Calcium carbonate
Cementitious composites
Cementitious materials
Civil infrastructures
Deflection capacity
Deformation capacity
Fiber reinforced
Four-point bending test
Jointless
Limestone powder
Link slabs
Pre-cracks
Self-healing
Self-healing behavior
Waste materials
Water/binder ratios
Bending tests
Blast furnaces
Calcium
Curing
Deflection (structures)
Gas burners
Limestone
Metal refineries
Plasticity
Powders
Slags
Stiffness
Strain hardening
Furnaces
To reference this document use:
http://resolver.tudelft.nl/uuid:89a52d2a-1229-45e1-a415-2734b3bfb615
TNO identifier
241775
ISSN
0958-9465
Source
Cement and Concrete Composites, 31 (9), 613-621
Document type
article