The Influence of SAP Void Introduction on the Crushing Behavior of Cement-based Materials
SU Jizhi1, YANG Shichao2, SHAO Hua3, ZHANG Wuchen1, YANG Haitao2,*
1 State Grid Hebei Electric Power Co., Ltd.,Economic and Technological Research Institute, ShiJiazhuang 050000, China 2 School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China 3 Hebei Huzhi Power Engineeing Design Co., Ltd., Shijiazhuang 050000, China
Abstract: Foam concrete is the most commonly used core material for aircraft arresting systems. However, foam concrete has some shortcomings, such as difficulty in controlling the foaming process, an unstable void system, and poor water resistance. Superabsorbent polymer (SAP) voids are artificial voids that offer better stability, uniformity, and designability compared to air voids. In this work, the crushing behavior of cement-based materials (CBMs) containing SAP voids were investigated before and after immersion. Moreover, the effects of SAP on the pore structure, micromechanical properties, and mineral composition of CBMs were studied using boiling tests, nanoindentation, and X-ray diffraction analysis. The results show that increasing the SAP dosage leads to a decrease in stress values and an increase in maximum crushability in the stress-crushability curve of CBMs. Increasing the SAP dosage also causes a reduction in the hardness of the matrix, which is attributed to the addition of extra water rather than the release of water from SAP particles. Compared to foam concrete, the crushing performance of CBMs containing SAP voids is more stable due to the superior uniformity and stability of the SAP void system. Additionally, the water resistance of CBMs containing SAP voids is superior, owing to the stronger mechanical properties of the matrix and the higher porosity of CBMs. The introduction of SAP voids provides new insights into the design of crushing performance for porous CBMs.
苏佶智, 杨世超, 邵华, 张戊晨, 杨海涛. SAP孔引入对水泥基材料压溃行为的影响[J]. 材料导报, 2025, 39(19): 24090207-8.
SU Jizhi, YANG Shichao, SHAO Hua, ZHANG Wuchen, YANG Haitao. The Influence of SAP Void Introduction on the Crushing Behavior of Cement-based Materials. Materials Reports, 2025, 39(19): 24090207-8.
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2025, Vol. 39 
