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Abstract
Superabsorbent polymers (SAPs) can be added to a concrete mixture to provide internal curing and reduce the risk for early-age shrinkage cracking. Hence, they help to increase the overall durability of concrete structures. The type, swelling characteristics, kinetics of water release, amount and particle size of the SAPs will dictate their effectiveness for this purpose. An anionic SAP was synthesized with varying amounts of cross-linker and ground to particle sizes with d50 varying between 10 and 100 μm. The swelling capacity in demineralised water of 40 μm particles increased with a decreasing degree of cross-linker from 87 g/g SAP to 270 g/g SAP, and was about 3 to 4 times larger than the swelling capacity in cement filtrate. The SAPs were tested for their effect on mortar workability, cement hydration kinetics and mechanical properties of the hardened mortar. With proper compensation for the absorbed water by the SAPs, the mortar workability was not negatively affected and a reduction in flow over the first two hours remained limited. The SAPs with the lowest swelling capacity, resulting in the least macro pore formation, showed the smallest negative effect on mortar compressive strength and a negligible effect on cement hydration. The difference in strength with the reference decreased as a function of mortar age. Different SAP particle sizes in the range of 10 􀂱 100 μm had no significant effect on mortar properties.
Keywords
Superabsorbent polymers (SAPs), mortar properties, particle size, cross-linker

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MLA
De Meyst, Laurence, et al. “Design and Testing of Anionic Polymers for Use in Durable Concrete Structures.” International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) : New Generation of Construction Materials, edited by Marijana Serdar et al., vol. 1, RILEM Publications, 2019, pp. 614–22.
APA
De Meyst, L., Mannekes, E., Pereira Gomes de Araújo, M. A., Snoeck, D., Van Tittelboom, K., Van Vlierberghe, S., … De Belie, N. (2019). Design and testing of anionic polymers for use in durable concrete structures. In M. Serdar, N. Stirmer, & J. Provis (Eds.), International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) : New Generation of Construction Materials (Vol. 1, pp. 614–622). Rovinj, Croatia: RILEM Publications.
Chicago author-date
De Meyst, Laurence, Els Mannekes, Maria Adelaide Pereira Gomes de Araújo, Didier Snoeck, Kim Van Tittelboom, Sandra Van Vlierberghe, Geert Deroover, and Nele De Belie. 2019. “Design and Testing of Anionic Polymers for Use in Durable Concrete Structures.” In International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) : New Generation of Construction Materials, edited by Marijana Serdar, Nina Stirmer, and John Provis, 1:614–22. RILEM Publications.
Chicago author-date (all authors)
De Meyst, Laurence, Els Mannekes, Maria Adelaide Pereira Gomes de Araújo, Didier Snoeck, Kim Van Tittelboom, Sandra Van Vlierberghe, Geert Deroover, and Nele De Belie. 2019. “Design and Testing of Anionic Polymers for Use in Durable Concrete Structures.” In International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) : New Generation of Construction Materials, ed by. Marijana Serdar, Nina Stirmer, and John Provis, 1:614–622. RILEM Publications.
Vancouver
1.
De Meyst L, Mannekes E, Pereira Gomes de Araújo MA, Snoeck D, Van Tittelboom K, Van Vlierberghe S, et al. Design and testing of anionic polymers for use in durable concrete structures. In: Serdar M, Stirmer N, Provis J, editors. International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) : New Generation of Construction Materials. RILEM Publications; 2019. p. 614–22.
IEEE
[1]
L. De Meyst et al., “Design and testing of anionic polymers for use in durable concrete structures,” in International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) : New Generation of Construction Materials, Rovinj, Croatia, 2019, vol. 1, pp. 614–622.
@inproceedings{8665236,
  abstract     = {Superabsorbent polymers (SAPs) can be added to a concrete mixture to provide internal
curing and reduce the risk for early-age shrinkage cracking. Hence, they help to increase the
overall durability of concrete structures. The type, swelling characteristics, kinetics of water
release, amount and particle size of the SAPs will dictate their effectiveness for this purpose.
An anionic SAP was synthesized with varying amounts of cross-linker and ground to particle
sizes with d50 varying between 10 and 100 μm. The swelling capacity in demineralised water
of 40 μm particles increased with a decreasing degree of cross-linker from 87 g/g SAP to 270
g/g SAP, and was about 3 to 4 times larger than the swelling capacity in cement filtrate. The
SAPs were tested for their effect on mortar workability, cement hydration kinetics and
mechanical properties of the hardened mortar. With proper compensation for the absorbed
water by the SAPs, the mortar workability was not negatively affected and a reduction in flow
over the first two hours remained limited. The SAPs with the lowest swelling capacity, resulting
in the least macro pore formation, showed the smallest negative effect on mortar compressive
strength and a negligible effect on cement hydration. The difference in strength with the
reference decreased as a function of mortar age. Different SAP particle sizes in the range of 10
􀂱 100 μm had no significant effect on mortar properties.},
  author       = {De Meyst, Laurence and Mannekes, Els and Pereira Gomes de Araújo, Maria Adelaide and Snoeck, Didier and Van Tittelboom, Kim and Van Vlierberghe, Sandra and Deroover, Geert and De Belie, Nele},
  booktitle    = {International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) : New Generation of Construction Materials},
  editor       = {Serdar, Marijana and Stirmer, Nina and Provis, John},
  isbn         = {9781510892941},
  keywords     = {Superabsorbent polymers (SAPs),mortar properties,particle size,cross-linker},
  language     = {eng},
  location     = {Rovinj, Croatia},
  pages        = {614--622},
  publisher    = {RILEM Publications},
  title        = {Design and testing of anionic polymers for use in durable concrete structures},
  volume       = {1},
  year         = {2019},
}