Structural Behaviour of Clay Brick Lime Mortar Masonry Walls Under Lateral Cyclic Loading in Dry and Wet Conditions

2021 ◽  
pp. 164-174
Author(s):  
A. Y. Elghazouli ◽  
D. V. Bompa ◽  
S. A. Mourad ◽  
A. Elyamani
Keyword(s):  
Cyclic Loading ◽  
Masonry Walls ◽  
Clay Brick ◽  
Structural Behaviour ◽  
Lime Mortar ◽  
Dry And Wet Conditions

scholarly journals In-plane lateral cyclic behaviour of lime-mortar and clay-brick masonry walls in dry and wet conditions

2021 ◽  
Author(s):  
A. Y. Elghazouli ◽  
D. V. Bompa ◽  
S. A. Mourad ◽  
A. Elyamani
Keyword(s):  
Material Properties ◽  
Large Scale ◽  
Failure Modes ◽  
Deformation Behaviour ◽  
Image Correlation ◽  
Masonry Walls ◽  
Clay Brick ◽  
Lime Mortar ◽  
Full Field ◽  
Shear Moduli

AbstractThis paper presents an experimental investigation into the structural and material response of ambient-dry and wet clay-brick/lime-mortar masonry elements. In addition to cyclic tests on four large-scale masonry walls subjected to lateral in-plane displacement and co-existing compressive gravity load, the study also includes complementary tests on square masonry panels under diagonal compression and cylindrical masonry cores in compression. After describing the specimen details, wetting method and testing arrangements, the main results and observations are provided and discussed. The results obtained from full-field digital image correlation measurements enable a detailed assessment of the material shear-compression strength envelope, and permit a direct comparison with the strength characteristics of structural walls. The full load-deformation behaviour of the large-scale walls is also evaluated, including their ductility and failure modes, and compared with the predictions of available assessment models. It is shown that moisture has a notable effect on the main material properties, including the shear and compression strengths, brick–mortar interaction parameters, and the elastic and shear moduli. The extent of the moisture effects is a function of the governing behaviour and material characteristics as well as the interaction between shear and precompression stresses, and can lead to a loss of more than a third of the stiffness and strength. For the large scale wall specimens subjected to lateral loading and co-existing compression, the wet-to-dry reduction was found to be up to 20% and 11% in terms of stiffness and lateral strength, respectively, whilst the ductility ratio diminished by up to 12%. Overall, provided that the key moisture-dependent material properties are appropriately evaluated, it is shown that analytical assessment methods can be reliably adapted for predicting the response, in terms of the lateral stiffness, strength and overall load-deformation, for both dry and wet masonry walls.

Experimental cyclic response assessment of partially grouted reinforced clay brick masonry walls

2018 ◽  
Vol 16 (7) ◽  
pp. 3127-3152 ◽  
Author(s):  
Cristián Sandoval ◽  
Sebastián Calderón ◽  
José Luis Almazán
Keyword(s):  
Response Assessment ◽  
Brick Masonry ◽  
Masonry Walls ◽  
Clay Brick ◽  
Cyclic Response ◽  
Reinforced Clay

Remediation and protection of masonry structures with crystallising moisture blocking treatment

2018 ◽  
Vol 36 (1) ◽  
pp. 77-92 ◽  
Author(s):  
Mazen J. Al-Kheetan ◽  
Mujib M. Rahman ◽  
Denis A. Chamberlain
Keyword(s):  
Construction Industry ◽  
Design Methodology ◽  
Masonry Structures ◽  
Lime Mortar ◽  
Content Type ◽  
Water Ingress ◽  
Surface Moisture ◽  
Key Driver ◽  
Dry And Wet Conditions ◽  
Sustainable Materials

Purpose The purpose of this paper is to investigate the performance of new and innovative crystallising materials, so-called moisture blockers, in protecting masonry structures from water ingress. Design/methodology/approach Two masonry wells were constructed: one with lime mortar and the other with cement-based mortar in order to hold water inside, and then a moisture blocking product was applied at dry and wet conditions to the negative hydrostatic pressure side. The moisture levels of both, the surfaces and the substrate, were then observed for 14 days. Findings Results demonstrated that moisture blocking materials are effective methods in reducing the levels of surface moisture for bricks, mortar-brick interface and mortar. Originality/value Moisture blockers use the available water in the masonry to block the passage of water to the surface of the masonry, filling pores, cracks and spaces at the interface between mortar and bricks. This approach will deliver a wider understanding of how water-based moisture blockers work and the scenarios in which they are best applied. The pursuit of possible environmentally friendly and sustainable materials for use in the construction industry is the key driver of this research.

scholarly journals Experimental Analysis of Seismic Performance of Masonry Shear Wall Reinforced with PP-Band Mesh and Plastering Mortar under In-Plane Cyclic Loading

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Qiang Zhou ◽  
Lingyu Yang ◽  
Wenyang Zhao
Keyword(s):  
Energy Dissipation ◽  
Cyclic Loading ◽  
Bearing Capacity ◽  
Low Cost ◽  
Low Frequency ◽  
Masonry Wall ◽  
Ultimate Bearing Capacity ◽  
Masonry Walls ◽  
Seismic Capacity ◽  
Energy Dissipation Capacity

Masonry structures are widely used in developing countries due to their low cost and simple construction, especially in remote areas, where there are a large number of houses without seismic measures. These buildings are prone to collapse and cause a lot of casualties, even under the action of small earthquakes. For the reinforcement of this structure, a cheap, effective, and easy-to-construct reinforcement method is urgently needed. Therefore, this article studies the reinforcement method of polypropylene bands (PP-bands). We have carried out low-frequency cyclic loading tests for two PP-band reinforced masonry walls and two compared masonry walls. We mainly studied the influence of PP-band and different compressive strengths of plastering mortar on the masonry wall’s seismic capacity. The seismic indicators mainly studied in this article include ultimate bearing capacity, energy dissipation capacity, stiffness degradation, and hysteresis characteristics. The experimental results show that the PP-band can greatly enhance the seismic capacity of the masonry wall. The ultimate bearing capacity, energy dissipation capacity, and displacement ductility of the PP-band reinforced wall are increased by 38%–48%, 22%–47%, and 138%–226%.

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