Autogenous healing of early-age cracks in cementitious materials by superabsorbent polymers

Geuntae Hong; Chiwon Song; Seongcheol Choi

doi:10.3390/ma13030690

Autogenous healing of early-age cracks in cementitious materials by superabsorbent polymers

Geuntae Hong
, Chiwon Song
, Seongcheol Choi

Department of Civil Engineering

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 μm) in cement paste and cement mortar containing 1.0% SAP decreased by around 97.1-100% and 79.7-90.7%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO₃ and/or calcium silicate hydrate (CSH) as the main healing products.

Original language	English
Article number	690
Journal	Materials
Volume	13
Issue number	3
DOIs	https://doi.org/10.3390/ma13030690
State	Published - 1 Feb 2020

Keywords

Autogenous healing
Compressive strength
Flow rate
Superabsorbent polymer (SAP)
Underwater
Wet/dry cycle

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title = "Autogenous healing of early-age cracks in cementitious materials by superabsorbent polymers",

abstract = "The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 μm) in cement paste and cement mortar containing 1.0\% SAP decreased by around 97.1-100\% and 79.7-90.7\%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO3 and/or calcium silicate hydrate (CSH) as the main healing products.",

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AU - Hong, Geuntae

AU - Song, Chiwon

AU - Choi, Seongcheol

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N2 - The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 μm) in cement paste and cement mortar containing 1.0% SAP decreased by around 97.1-100% and 79.7-90.7%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO3 and/or calcium silicate hydrate (CSH) as the main healing products.

AB - The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 μm) in cement paste and cement mortar containing 1.0% SAP decreased by around 97.1-100% and 79.7-90.7%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO3 and/or calcium silicate hydrate (CSH) as the main healing products.

KW - Autogenous healing

KW - Compressive strength

KW - Flow rate

KW - Superabsorbent polymer (SAP)

KW - Underwater

KW - Wet/dry cycle

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DO - 10.3390/ma13030690

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VL - 13

JO - Materials

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ER -

Autogenous healing of early-age cracks in cementitious materials by superabsorbent polymers

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Keywords

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