PSI - Issue 74

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2025) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2025) 000–000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 74 (2025) 44–49

Eleventh International Conference on Materials Structure and Micromechanics of Fracture Effect of polymer additive on the course of shrinkage deformation of fine-grained cementitious composites Eleventh International Conference on Materials Structure and Micromechanics of Fracture Effect of polymer additive on the course of shrinkage deformation of fine-grained cementitious composites

Małgorzata Lenart a * , Maciej Gruszczyński a a Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland Małgorzata Lenart a * , Maciej Gruszczyński a a Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland

© 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Libor Pantělejev © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Libor Pant ĕ lejev Keywords: polymer additive; stearin-butadiene latex; curing; cement mortar; contraction; 1. Introduction Nowadays, cement concrete is the most common building material. It has many advantages, including flexibility in forming and very good compressive strength. However, it is not without disadvantages, which include very low tensile strength, flexural strength and unfavourable volume changes such as shrinkage, Dadd (2025), Lenart (2019). Of course, these disadvantages can be limited in various ways, such as the use of dispersed reinforcement (fibers), the use of an Abstract The article presents the results of the study of shrinkage of cement composites modified with a polymer additive and cured in three ways: no additional protection against drying covering the samples with a curing agent and covering the samples with foil. The polymer additive, through its structural effect and its distribution in the structure blocking the evaporation of water from the capillaries, caused a reduction in shrinkage by 30%. And with the synergistic effect of the additive and curing the samples under the foil, the reduction in total shrinkage was 65%. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Libor Pant ĕ lejev Keywords: polymer additive; stearin-butadiene latex; curing; cement mortar; contraction; 1. Introduction Nowadays, cement concrete is the most common building material. It has many advantages, including flexibility in forming and very good compressive strength. However, it is not without disadvantages, which include very low tensile strength, flexural strength and unfavourable volume changes such as shrinkage, Dadd (2025), Lenart (2019). Of course, these disadvantages can be limited in various ways, such as the use of dispersed reinforcement (fibers), the use of an Abstract The article presents the results of the study of shrinkage of cement composites modified with a polymer additive and cured in three ways: no additional protection against drying covering the samples with a curing agent and covering the samples with foil. The polymer additive, through its structural effect and its distribution in the structure blocking the evaporation of water from the capillaries, caused a reduction in shrinkage by 30%. And with the synergistic effect of the additive and curing the samples under the foil, the reduction in total shrinkage was 65%.

* Corresponding author. Tel.: +48-12-628-23-63. E-mail address: malgorzata.lenart@pk.edu.pl * Corresponding author. Tel.: +48-12-628-23-63. E-mail address: malgorzata.lenart@pk.edu.pl

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Libor Pant ĕ lejev 2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Libor Pant ĕ lejev

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of Libor Pantělejev 10.1016/j.prostr.2025.10.032