Abstract
Concrete is currently the most used man-made construction material. Unfortunately it is prone to defects, such as cracks. Crack repair is possible by incorporation of superabsorbent polymers (SAPs) which can fill a crack by swelling and promote formation of healing products. However, SAPs are usually acrylate-based and not biodegradable. Present work focuses on development of SAPs based on poly(aspartic acid) (PASP), which is a biobased and biodegradable alternative of acrylate-based polymers. The developed SAP was incorporated in mortar and the effect on the mortar properties was studied. When adding 1 m% SAP, a decrease in strength was observed, similar to commercially available acrylate-based SAPs. The SAPs showed an efficient and immediate sealing effect in cracked mortar, reflected by a reduction in water permeability over 50%. Hence, the developed biobased SAP shows good sealing properties and could be used as a sustainable alternative for acrylic SAPs in concrete repair.
Original language | English |
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Pages (from-to) | 925-940 |
Number of pages | 16 |
Journal | Journal of Sustainable Cement-Based Materials |
Volume | 12 |
Issue number | 8 |
Early online date | 1 Oct 2022 |
DOIs | |
Publication status | Published - 3 Aug 2023 |
Keywords
- poly(aspartic acid)
- superabsorbent polymers
- sustainable
- cementitious materials
- self-sealing
- POLYASPARTIC ACID
- AUTOGENOUS SHRINKAGE
- WATER PERMEABILITY
- SOIL CONDITIONER
- CROSS-LINKING
- IN-VITRO
- CONCRETE
- HYDROGELS
- PERFORMANCE
- DELIVERY