Work

Study on the bond performance and reliability of the interface between full-lightweight ceramsite concrete and frost damage concrete under freeze-thaw cycles

Year: 2025

Type: article

Abstract: To study the interface durability of frost damaged concrete (FDC) reinforced by full-lightweight ceramsite concrete (FLWCC) in cold regions. The macro-micro structure and interface bond strength of FLWCC-FDC composite specimens under different freeze-thaw cycles (FTCs) were evaluated by FTCs test, splitting tensile test, slant shear test and scanning electron microscope (SEM) test. The reliability prediction model of FLWCC-FDC interface bond strength was established based on Wiener random process. The results show that the bond strength of FLWCC-FDC interface decreased with the increase of FTCs. The slight frost damage was beneficial to the interface bond strength in the early stage of freeze-thaw, especially the interface slant shear strength, but the severe frost damage was harmful. The increase of bond strength by interface treatment can effectively offset the decrease of bond strength caused by frost damage, so as to improve the overall bond strength. The porosity of the interfacial transition zone (ITZ) increased with the increase of FTCs, and there was a significant negative linear correlation between porosity and bond strength. The Wiener random process model can effectively predict the interface life of FLWCC-FDC under FTCs, and the sensitivity of using slant shear strength as damage index is the highest.

Source: Case Studies in Construction Materials

DOI: 10.1016/j.cscm.2025.e05329

Authors: Hongbing Zhu, Siyu Wen, Zhenghao Fu, Zhengfa Guo, Peng Liu

Institutions: Wuhan University of Science and Technology, Central South University

Language: English

Topic: Structural Behavior of Reinforced Concrete

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,660