Effect of superabsorbent polymers (SAP) on fresh state mortars with ground granulated blast-furnace slag (GGBS)

Fernando Do Counto Rosa Almeida, Agnieszka Klemm

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Although cementitious materials are the main construction materials and worldwide produced, there is still a major concern about their sustainability and durability, especially in terms of conserving resources, reducing wastes, and decreasing the environmental impacts of repair and replacement. In general, cementitious materials are very susceptible to cracking provoked by autogenous shrinkage due to their associated self-desiccation process. The problem is even more critical in concrete with blended cements, including Portland cement with ground granulated blast-furnace slag (GGBS). The current paper evaluates efficiency of superabsorbent polymers (SAP) as internal curing agents; shrinkage reduction in mortars with different levels of cement replacement by GGBS (0, 25, 50, and 75%) is presented. The study is focused on three types of SAPs with different water absorption/desorption capacities (SAP I: 10 g/g, SAP II: 25–30 g/g, and SAP III: 35 g/g in cement paste solution). Tests of consistency, density, air content of fresh mortar, setting times, and autogenous shrinkage are analysed. The results showed that mortars with SAP can significantly reduce autogenous shrinkage for any studied GGBS content in comparison with the reference mortar. The reduction of autogenous shrinkage by SAP may decrease the cracking susceptibility and hence increase the sustainability level of the material for more durable constructions.
Original languageEnglish
Title of host publicationProceedings of ICDCS 2016
Number of pages7
DOIs
Publication statusPublished - Jul 2016

Fingerprint

Mortar
Slags
Polymers
Cements
Sustainable development
Water absorption
Portland cement
Environmental impact
Curing
Desorption
Durability
Repair
Concretes
Air

Keywords

  • autogenous shrinkage
  • fresh state mortar
  • ground granulated blast-furnace slag
  • superabsorbent polymers

Cite this

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title = "Effect of superabsorbent polymers (SAP) on fresh state mortars with ground granulated blast-furnace slag (GGBS)",
abstract = "Although cementitious materials are the main construction materials and worldwide produced, there is still a major concern about their sustainability and durability, especially in terms of conserving resources, reducing wastes, and decreasing the environmental impacts of repair and replacement. In general, cementitious materials are very susceptible to cracking provoked by autogenous shrinkage due to their associated self-desiccation process. The problem is even more critical in concrete with blended cements, including Portland cement with ground granulated blast-furnace slag (GGBS). The current paper evaluates efficiency of superabsorbent polymers (SAP) as internal curing agents; shrinkage reduction in mortars with different levels of cement replacement by GGBS (0, 25, 50, and 75{\%}) is presented. The study is focused on three types of SAPs with different water absorption/desorption capacities (SAP I: 10 g/g, SAP II: 25–30 g/g, and SAP III: 35 g/g in cement paste solution). Tests of consistency, density, air content of fresh mortar, setting times, and autogenous shrinkage are analysed. The results showed that mortars with SAP can significantly reduce autogenous shrinkage for any studied GGBS content in comparison with the reference mortar. The reduction of autogenous shrinkage by SAP may decrease the cracking susceptibility and hence increase the sustainability level of the material for more durable constructions.",
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Effect of superabsorbent polymers (SAP) on fresh state mortars with ground granulated blast-furnace slag (GGBS). / Almeida, Fernando Do Counto Rosa; Klemm, Agnieszka.

Proceedings of ICDCS 2016 . 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

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AU - Klemm, Agnieszka

N1 - *1-1-35* temp embargo 5th International Conference on Durability of Concrete Structures Paper Number MS #1102 Jun 30- Jul 1, 2016 Shenzhen University, Shenzhen, Guangdong, P.R.China VoR uploaded from pub site, unknown repository policy

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