Behaviour of masonry wallettes made from a new concrete formulation under compression loads at ambient temperatures: Testing and modelling

Al-Sibahy, Adnan; Edwards, Rodger

doi:10.1016/j.conbuildmat.2014.04.043

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…Since its essential components are easily produced from the available raw materials, it kept the momentum of the construction field ongoing. During the past centuries, the configuration of the masonry walls showed many developments starting from the upgrading of its components followed by improving the traditional construction techniques [2,3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Chases with Renovation Techniques on the Load Carrying Capacity of Masonry Walls

Al-Sibahy

Edwards

2021

Infrastructures

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Infrastructure through the masonry walls (for example, wiring and piping works) are usually installed using chases in different directions. Introducing these chases in a newly built wall will affect its overall load carrying capacity. However, there has thus far been very limited research into the effects of chases on the response and load carrying capacity of walls. This study has been undertaken to evaluate the structural behaviour of new masonry walls having chases in both horizontal and vertical directions and subjected to compression load throughout an extensive experimental programme. In addition, two renovation techniques have been proposed to infill the chases created in small scale walls (wallettes). The first technique involved the use of plastic wire mesh and cement mortar, while the second incorporated using galvanized steel channel together with the plastic wire mesh and cement mortar. Furthermore, a reference case of wallette without chases has been considered to enable reasonable comparisons to check the effect of the chases and the efficiency of the proposed renovation techniques. The outcomes of this study were used to modify the design equations proposed in the relevant codes of practice. The obtained results showed a notable reduction in the load carrying capacity of the masonry wall due to the introduction of the chases with a reduction percentage of 29% compared to the masonry wall without chase. The percentage decrease depends on the depth of the chase and the inclination angle of the load flow. The walls with horizontal chases exhibited more reduction in the load carrying capacity compared to those with vertical chases. The adopted renovation techniques using galvanized steel channel and/or plastic wire mesh with cement mortar recovered 55% and 93% of the lost load carrying capacity due to the presence of the chase and the failure was due to the de-bonded phenomena of the infill materials. Suitable factors of safety have been proposed to be incorporated in the compressive strength and modulus of elasticity formulas of the masonry walls of the BS EN codes.

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Section: Introductionmentioning

confidence: 99%

Effect of Chases with Renovation Techniques on the Load Carrying Capacity of Masonry Walls

Al-Sibahy

Edwards

2021

Infrastructures

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“…The used of composite walls have many advantages, which include, reduction the implementation cost by using clay as a mortar of grout to fill the cavity between the external and internal wall leafs; improving thermal insulation of the wall and increasing the speed of construction [15].…”

Section: Site Investigationsmentioning

confidence: 99%

Characterization of the clay masonry units and construction technique at the ancient city of Nippur

Al-Sibahy

Edwards

2017

Engineering Structures

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This paper describes a programme of experimental measurements performed in support of a parallel programme of field investigations to evaluate the construction methods used at the site of the ancient city of Nippur. The experimental programme investigated both the mechanical properties and durability of the ancient clay masonry units used in the construction of buildings at Nippur including tests for dimensional consistency and flatness, density, compressive strength, initial rate of water absorption and thermal properties. The test results have been compared with those for modern brick units available nowadays in Iraq and with hard natural stone samples.The field investigations showed that the important buildings were constructed using composite walls inclusion firing clay masonry units with two nominal dimensions (30× 30×7) cm and (30× 15× 7) cm (l, w and h). The formulation of working design technique was followed to achieve the member stability under applied loads. Layers of bitumen material were used as a binder for both bed and head joints in order to provide the desired strength level for the masonry wall. The experimental results show that the ancient brick units and stone samples exceed the tolerance and range of dimensions limits recommended by current EN Standards. Lower density values were recorded for the ancient brick units compared with that for both modern clay brick and stone specimens and these values showed agreement with the modern classification of high density (HD) units. Approximately similar values of compressive strength were observed for both ancient brick units and natural stone samples reaching about 17 MPa, whilst modern clay brick samples showed lower compressive strength value suitable for application of partition walls. The initial rate of water absorption increases with an increase of the soaking time, but tends to decrease after 90 minutes for both ancient and modern brick units. Superior performance in terms of thermal conductivity, thermal resistance and durability under fire action were observed for the ancient brick samples compared with modern clay brick and stone samples.

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The Effect of Grouting Material to the Compressive Strength and Modulus of Elasticity of the Biaxial Interlocking Block Prisms

Aziz

Arshad

Mansor

2020

Lecture Notes in Civil Engineering

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Behaviour of masonry wallettes made from a new concrete formulation under compression loads at ambient temperatures: Testing and modelling

Cited by 7 publications

References 17 publications

Effect of Chases with Renovation Techniques on the Load Carrying Capacity of Masonry Walls

Effect of Chases with Renovation Techniques on the Load Carrying Capacity of Masonry Walls

Characterization of the clay masonry units and construction technique at the ancient city of Nippur

The Effect of Grouting Material to the Compressive Strength and Modulus of Elasticity of the Biaxial Interlocking Block Prisms

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