Work

The influence of superabsorbent polymers on the mechanical and shrinkage properties of engineered geopolymer composites

Year: 2025

Type: article

Abstract: Despite the excellent mechanical properties and crack control capabilities of Engineered Geopolymer Composites (EGC), they still face the challenge of high shrinkage rates in engineering applications. To address this issue, this study incorporated Superabsorbent Polymers (SAP) into EGC pastes via dry mixing and pre-absorbent mixing methods, and analyzed the effects of different SAP dosages, particle sizes, and mixing methods on the workability, mechanical properties, and shrinkage properties of EGC. The results showed that the addition of SAP effectively improved the tensile toughness and shrinkage properties of EGC, regardless of the mixing method used. The compressive strength and tensile strength of EGC with SAP dry mixing method are significantly improved, while pre-absorbent mixing showed better effects on improving the flowability, setting time, and tensile toughness of EGC. The reduction of EGC's self-contraction and early-age drying shrinkage largely depended on the particle size and dosage of SAP particles.

Source: Construction and Building Materials

DOI: 10.1016/j.conbuildmat.2025.143252

Authors: Shiping Yin, Mohan Liu, Linghua Shen, Jiaying Zhu

Institutions: China University of Mining and Technology, Taiyuan University of Technology

Language: English

Topic: Concrete Properties and Behavior

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,540

Funders: National Natural Science Foundation of China, China University of Mining and Technology