Experimental Study on the Compressive Behaviors of Brick Masonry Strengthened with Modified Oyster Shell Ash Mortar
2. Experimental Program
2.1. Materials and Specimens
2.2. Axial Compressive Test
3. Test Results and Discussion
3.1. Failure Characteristics of Specimens
3.2. Compressive Strength
3.3. Calculation of Compressive Strength
3.4. Stress–Strain Relationship
- The failure process of strengthened and non-strengthened specimens under axial compression was similar. They all experienced initial cracking and crack propagation and were disintegrated at ultimate load. The major difference was the location of cracks. For strengthened specimens, vertical cracks occurred on the junction between the original mortar and the replaced mortar, besides on the vertical mortar joints as those of non-strengthened specimens.
- The compressive strength of non-strengthened specimens made of fired clay brick and OSAC mortar met the requirements of vertical load bearing. The main purpose of strengthening these kinds of masonry buildings was to improve their shear strength in resisting earthquake action. Compared with the non-strengthened specimens, the compressive strength for unilateral strengthened specimens increased by 11.3% on average. Moreover, for bilateral strengthened specimens, the value increased by 11.5% on average. The experimental results showed that the compressive strength of specimens strengthened with MOSA mortar also improved, although the main strengthening purpose was to improve their shear strength.
- The formulas to calculate compressive strength for brick masonry made with OSAC mortar and those strengthened with MOSA mortar were obtained by fitting the test results. The calculated values were consistent with the tested ones.
- The stress–strain relationship of tested specimens under axial compression were simulated using a parabolic model. The simulation results for strengthened specimens were consistent with the experimental data.
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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|Mortar Type||Mix Proportions by Mass|
|OSAC mortar||oyster shell ash/sand/clay/water|
|MOSA mortar||oyster shell ash/siliceous material A/aluminous material B/sand/water|
|Material||OSAC Mortar||MOSA Mortar||Brick|
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Chen, Z.; Chen, W.; Mai, C.; Shi, J.; Xie, Y.; Hu, H. Experimental Study on the Compressive Behaviors of Brick Masonry Strengthened with Modified Oyster Shell Ash Mortar. Buildings 2021, 11, 266. https://doi.org/10.3390/buildings11070266
Chen Z, Chen W, Mai C, Shi J, Xie Y, Hu H. Experimental Study on the Compressive Behaviors of Brick Masonry Strengthened with Modified Oyster Shell Ash Mortar. Buildings. 2021; 11(7):266. https://doi.org/10.3390/buildings11070266Chicago/Turabian Style
Chen, Zhouyi, Wenyuan Chen, Chenglin Mai, Jianguang Shi, Yiren Xie, and Hongmei Hu. 2021. "Experimental Study on the Compressive Behaviors of Brick Masonry Strengthened with Modified Oyster Shell Ash Mortar" Buildings 11, no. 7: 266. https://doi.org/10.3390/buildings11070266