Open Access

ARTICLE

Experimental Study on Axial Compressive Behavior and Constitutive Model of Restored Mortar Masonry

Dongyu Teng^1,2,*, Hao Tang^1,3,*, Peng He^1,2, Zhen Hao^1,2

1 China Academy of Building Research, Beijing, 100013, China
2 CABR Testing Center Co., Ltd., Beijing, 102600, China
3 CABR Foundation Engineering Co., Ltd., Beijing, 100013, China

* Corresponding Authors: Dongyu Teng. Email: ; Hao Tang. Email:

Structural Durability & Health Monitoring 2025, 19(6), 1717-1731. https://doi.org/10.32604/sdhm.2025.069751

Received 30 June 2025; Accepted 27 August 2025; Issue published 17 November 2025

Abstract

In order to study the axial compression characteristics of brick masonry historical buildings, and to better protect and repair traditional mortar-brick masonry historical buildings, axial compression tests were carried out on three kinds of restored mortar (pure mud mortar, pure mortar, and mud mortar) brick masonry with restored mortar brick masonry as the object of study. The damage modes, axial compression chemical indexes (compressive strength and elastic modulus), load-displacement curves and stress-strain curves of the three kinds of restored mortar brick masonry were obtained. The experimental results show that the compressive strength of mud mortar brick masonry of 1.676 MPa is better than that of pure mud 1.530 MPa and pure mortar 1.471 MPa brick masonry, which is due to the difference in the bond effect between the restored mortar material and the brick block. According to the test results, the compressive strength formula of the restored mortar brick masonry was modified, and the reasons for the difference between the experimental value of the modulus of elasticity of the restored mortar brick masonry and that of the traditional formula and the measured value were compared and analyzed by a factor of 6.73–7.1. Referring to the axial-pressure ontological relationship of the conventional brick masonry, the 4-parameter segmental function expression was proposed for the characterization of the stress-strain relationship of the restored mortar brick masonry with the use of the stress-strain normalization process. The research results provide theoretical support for the inheritance and development of traditional mortar brick masonry historical architecture.

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Keywords

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