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A platform for research: civil engineering, architecture and urbanism
Effect of novel superabsorbent polymer composites on the fresh and hardened properties of alkali-activated slag
https://orcid.org/0000-0003-2665-3942
Highlights Novel poly(sodium-acrylate acrylamide) superabsorbent polymer composites are synthesized. The impact of SAP composites on the fresh and hardened properties of AAS is evaluated. The micro silica and kaolin clay-reinforced SAP composites show better performance in AAS.
Abstract In this work, the poly(sodium-acrylate acrylamide) superabsorbent polymer (SAP) composites reinforced with micro silica and kaolin clay particles are evaluated as novel additives to control and improve the fresh and hardened properties of alkali-activated slag (AAS). The water swelling and retention capacity of plain and modified SAPs in various solutions pertinent to AAS binder systems (including deionized water, saturated Ca(OH)2, 1.0 M NaOH, 0.5 M Na2CO3, and 0.5 M Na2SO4) are studied using the gravimetric ‘tea bag’ and thermogravimetric methods, together with molecular analysis. The results show that the use of micro silica and kaolin clay-reinforced SAP composites slightly alleviates the negative influence of conventional SAP counterparts on the flowability, setting, and early-age compressive strength of AAS pastes. Nevertheless, the addition of SAP composites merely postpones the early-stage drying shrinkage development but tends to increase the long-term deformation of hardened AAS in unsealed conditions, likely due to the reduced bulk stiffness with enlarged porosity.
Effect of novel superabsorbent polymer composites on the fresh and hardened properties of alkali-activated slag
https://orcid.org/0000-0003-2665-3942
Highlights Novel poly(sodium-acrylate acrylamide) superabsorbent polymer composites are synthesized. The impact of SAP composites on the fresh and hardened properties of AAS is evaluated. The micro silica and kaolin clay-reinforced SAP composites show better performance in AAS.
Abstract In this work, the poly(sodium-acrylate acrylamide) superabsorbent polymer (SAP) composites reinforced with micro silica and kaolin clay particles are evaluated as novel additives to control and improve the fresh and hardened properties of alkali-activated slag (AAS). The water swelling and retention capacity of plain and modified SAPs in various solutions pertinent to AAS binder systems (including deionized water, saturated Ca(OH)2, 1.0 M NaOH, 0.5 M Na2CO3, and 0.5 M Na2SO4) are studied using the gravimetric ‘tea bag’ and thermogravimetric methods, together with molecular analysis. The results show that the use of micro silica and kaolin clay-reinforced SAP composites slightly alleviates the negative influence of conventional SAP counterparts on the flowability, setting, and early-age compressive strength of AAS pastes. Nevertheless, the addition of SAP composites merely postpones the early-stage drying shrinkage development but tends to increase the long-term deformation of hardened AAS in unsealed conditions, likely due to the reduced bulk stiffness with enlarged porosity.
Effect of novel superabsorbent polymer composites on the fresh and hardened properties of alkali-activated slag
https://orcid.org/0000-0003-2665-3942
Highlights Novel poly(sodium-acrylate acrylamide) superabsorbent polymer composites are synthesized. The impact of SAP composites on the fresh and hardened properties of AAS is evaluated. The micro silica and kaolin clay-reinforced SAP composites show better performance in AAS.
Abstract In this work, the poly(sodium-acrylate acrylamide) superabsorbent polymer (SAP) composites reinforced with micro silica and kaolin clay particles are evaluated as novel additives to control and improve the fresh and hardened properties of alkali-activated slag (AAS). The water swelling and retention capacity of plain and modified SAPs in various solutions pertinent to AAS binder systems (including deionized water, saturated Ca(OH)2, 1.0 M NaOH, 0.5 M Na2CO3, and 0.5 M Na2SO4) are studied using the gravimetric ‘tea bag’ and thermogravimetric methods, together with molecular analysis. The results show that the use of micro silica and kaolin clay-reinforced SAP composites slightly alleviates the negative influence of conventional SAP counterparts on the flowability, setting, and early-age compressive strength of AAS pastes. Nevertheless, the addition of SAP composites merely postpones the early-stage drying shrinkage development but tends to increase the long-term deformation of hardened AAS in unsealed conditions, likely due to the reduced bulk stiffness with enlarged porosity.
Effect of novel superabsorbent polymer composites on the fresh and hardened properties of alkali-activated slag
Fu, Chuanqing (author) / Ye, Hailong (author) / Lei, Aoke (author) / Yang, Guojun (author) / Wan, Pan (author)
2019-10-11
Article (Journal)
Electronic Resource
English
Fresh and hardened properties of alkali-activated fly ash/slag pastes with superplasticizers
| Online Contents | 2014
Fresh and hardened properties of alkali-activated fly ash/slag pastes with superplasticizers
| British Library Online Contents | 2014