The influence of superabsorbent polymers on strength and durability properties of blended cement mortars

Beushausen, H.; Gillmer, M.; Alexander, Mark

doi:10.1016/j.cemconcomp.2014.03.008

Cited by 121 publications

(59 citation statements)

References 9 publications

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“…One method of internal curing that has been explored more recently is the use of covalently crosslinked superabsorbent polymer (SAP) hydrogels [12][13][14][15][16][17].These hydrogels are able to absorb and retain up to several hundred times their dry weight in fluid [18]. Hydrogels have been found to reduce autogenous shrinkage in HPC, and although some researchers have reported a decrease in early age strength after adding hydrogels, strength did recover to control levels with sufficient time [11,12,16,17,19]. The ability to control the mechanical response, swelling response, shape [20], and size of the hydrogels could also lead to hydrogels imparting multiple benefits to concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Internal curing techniques offer a solution to this problem of HPC self-desiccation. One method of internal curing that has been explored more recently is the use of covalently crosslinked superabsorbent polymer (SAP) hydrogels [12][13][14][15][16][17]. These hydrogels are able to absorb and retain up to several hundred times their dry weight in fluid [18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improved Concrete Materials with Hydrogel-Based Internal Curing Agents

Krafcik

Macke

Erk

2017

Gels

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This research article will describe the design and use of polyelectrolyte hydrogel particles as internal curing agents in concrete and present new results on relevant hydrogel-ion interactions. When incorporated into concrete, hydrogel particles release their stored water to fuel the curing reaction, resulting in reduced volumetric shrinkage and cracking and thus increasing concrete service life. The hydrogel's swelling performance and mechanical properties are strongly sensitive to multivalent cations that are naturally present in concrete mixtures, including calcium and aluminum. Model poly(acrylic acid(AA)-acrylamide(AM))-based hydrogel particles with different chemical compositions (AA:AM monomer ratio) were synthesized and immersed in sodium, calcium, and aluminum salt solutions. The presence of multivalent cations resulted in decreased swelling capacity and altered swelling kinetics to the point where some hydrogel compositions displayed rapid deswelling behavior and the formation of a mechanically stiff shell. Interestingly, when incorporated into mortar, hydrogel particles reduced mixture shrinkage while encouraging the formation of specific inorganic phases (calcium hydroxide and calcium silicate hydrate) within the void space previously occupied by the swollen particle.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improved Concrete Materials with Hydrogel-Based Internal Curing Agents

Krafcik

Macke

Erk

2017

Gels

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“…Fly ash is generally known to decrease strength development at early ages and is typically slower than in conventional Portland cement content, because the early age bonding of fly ash particles to the cement matrix is very weak [6] [16]. Moreover, the addition of SAP to the mix reduces the mechanical performance of cement composites due to the voids introduced in the matrix after deswelling the of SAP particles [10] [17] [18]. Nonetheless, the case of mixes with silica fume showed to attain greater strengths, especially the mixes only with silica fume (SF10) and silica fume with SAP (SF10SAP), after 91 days of curing reaching, 53 and 51 MPa, respectively.…”

Section: Compressive Strengthmentioning

confidence: 99%

Study on the Expansion of a Cement-Based System Containing Sap Polymer and Supplementary Cementing Materials

Ávalos-Rendón¹,

Mendoza²

2017

MSA

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In this paper, the addition of admixed superabsorbent polymer (SAP) improved the microstructure and durability-related properties in a cement-based system with supplementary materials. This is an important issue in real construction projects when good durability properties are required. This study investigates the effect of SAP on the systems using cement replacement by fly ash and silica fume considering the strength properties and durability properties of paste under sulfate attack of cement-based system. The replacement considered in the study was of 10% silica fume and 20% fly ash in each case, the dosage of SAP was 0.25% of the total amount of cementitious material. The results showed that the addition of SAP in the cement-based system improved the compressive strength and reduced expansion to sulfate attack. Scanning electron micrographs showed that utilization of fly ash with silica fume and silica fume with SAP resulted in a much denser microstructure, thereby, leading to an increase in compressive strength and lower expansion under sulfate attack.

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“…However, it can be partly recovered with time due to ongoing hydration facilitated by the internal curing mechanisms [17,23]. SAP promotes creation of a dense network of CSH in a collapsed state, and hence leading to pore closures and increased compressive strength [16,19,32].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Superabsorbent polymers (SAP) may eliminate or substantially reduce this effect by supplying setting and hardening concrete with additional water resources for internal curing [12][13][14][15][16]. Although significant efforts have been made during the last couple of decades there is still a lack of consensus on mechanisms ruling SAP actions in cementitious materials [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Towards more sustainable construction–application of superabsorbent polymers in cementitious matrices with reduced carbon footprint

Klemm

Almeida

2018

MATEC Web Conf.

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Abstract. Construction industry is constantly searching for sustainable innovations to mitigate negative environmental impacts. Ground granulated blast-furnace slag (GGBS) is a well-known supplementary cementitious material which contributes to reduction of energy and CO 2 emissions from cement industry. However, its use in cementitious systems leads to materials with high cracking susceptibility due to their greater autogenous shrinkage triggered by self-desiccation processes. This problem is even more pronounced when concrete is exposed to severe dry-hot weather conditions, such as in North Africa. In order to mitigate this negative effect of cracking, internal curing agents in the form of Superabsorbent polymers (SAP) can be successfully used. This approach leads to more durable cement based materials and in turn more sustainable constructions.

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The influence of superabsorbent polymers on strength and durability properties of blended cement mortars

Cited by 121 publications

References 9 publications

Improved Concrete Materials with Hydrogel-Based Internal Curing Agents

Improved Concrete Materials with Hydrogel-Based Internal Curing Agents

Study on the Expansion of a Cement-Based System Containing Sap Polymer and Supplementary Cementing Materials

Towards more sustainable construction–application of superabsorbent polymers in cementitious matrices with reduced carbon footprint

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