Cyclicity estimation of superabsorbent polymer in concretes based on similarity principles

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Construction and Building Materials Pub Date : 2025-02-22 DOI:10.1016/j.conbuildmat.2025.140489

Chao Yao , Yinchuan Guo , Aiqin Shen , Zhenghua Lyu , Hansong Wu , Jinhua Wu

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引用次数: 0

Abstract

The cyclicity of superabsorbent polymers (SAP) significantly impact the efficiency and sustainability of crack self-healing for concretes. This study proposed a method to assess the cyclic absorption-release ability of SAP in concretes based on the similarity principles of materials and geometry. The evolution of its properties during cycling was characterized using the tea-bag method. Microstructure, elemental composition, content, and functional groups were analyzed through field emission scanning electron microscope, energy dispersive spectrometry, and Fourier transform infrared spectroscopy. Results demonstrate that the absorption capacity of SAP with different particle sizes showed a rapid then a slow decrease with the increasing wet/dry cycles. The increased swellable volume accelerated the attenuation process, exacerbating ion complexation, and ageing. Despite these changes, SAP exhibited excellent cyclicity owing to its high molecular stability with minor changes in functional groups. It is necessary to consider the matrix space limitation in the estimation process, which can enhance the reliability and availability of SAP durability tests in concretes.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.