The uniaxial monotonic compressive stress-strain behavior and other characteristics of unreinforced masonry and its constituents, i.e., solid clay bricks and mortar, have been studied by several laboratory tests. Based on the results and observations of the comprehensive experimental study, nonlinear stress-strain curves have been obtained for bricks, mortar, and masonry and six “control points” have been identified on the stress-strain curves of masonry, which can also be used to define the performance limit states of the masonry material or member. Using linear regression analysis, a simple analytical model has been proposed for obtaining the stress-strain curves for masonry that can be used in the analysis and design procedures. The model requires only the compressive strengths of bricks and mortar as input data, which can be easily obtained experimentally and also are generally available in codes. Simple relationships have been identified for obtaining the modulus of elasticity of bricks, mortar, and ...

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Stress-Strain Characteristics of Clay Brick Masonry under Uniaxial Compression

The characteristics of brick masonry are influenced by the properties of bricks and mortar. This paper attempts at studying the properties of brick masonry using table moulded bricks and wire-cut bricks of India with various types of mortars. The strength and elastic modulus of brick masonry under compression have been evaluated for strong-brick soft-mortar and soft-brick strong-mortar combinations. Various sizes of prisms and wallettes have been tested during these experiments to study the size effect and different bonding arrangements. The failure mechanisms of such specimens have been studied. Attempts are also made to derive empirical relationships for masonry strength as a function of brick and mortar strength in the Indian context.

Strength and elasticity of brick masonry prisms and wallettes under compression

Embodied energy in cement stabilised rammed earth walls

Utilization of marble powder as fine aggregate in mortar mixes

An investigation on use of paper mill sludge in brick manufacturing

This paper focuses on some issues pertaining to brick-mortar bond and masonry compressive strength Failure theories for masonry under compression make the assumption that the bond between brick and mortar remains intact at the time of failure of the brick or mortar The influence of bond strength on masonry compressive strength is not fully accounted for in these failure theories In this investigation, the influence of bond strength on masonry compressive strength has been examined through an experimental program using local bricks and mortars Masonry prism compressive strength has been determined when the brick-mortar bond strength is varied over a wide range without altering the strength and deformation characteristics of the brick and mortar Brick-mortar bond strength has been determined through flexure bond strength and shear bond strength tests A relationship between the masonry prism compressive strength and bond strength has been obtained The results clearly indicate that an increase in bond strength, while keeping the mortar strength constant, leads to an increase in the compressive strength of masonry

Brick-Mortar Bond and Masonry Compressive Strength

Manufactured Sand (M Sand) has become a viable alternative for the river sand in the construction industry as a potential fine aggregate. The M Sand poses environmental implications as it is produced by crushing natural resources like stones. The extensive use of M Sand may also lead to a reduction in availability due to the depletion of natural rocks in the days to come. Hence, this study attempts to assess the feasibility of utilizing the clayey soil containing Kaolinite – Montmorillonite (KM) as a predominant clay mineral, as a replacement to the Manufactured sand in the preparation of cement mortar and cement block that are used in masonry construction. In the case of concrete block masonry units, the M Sand is replaced by 25%, 50%, and 100% with KM Soil, and an attempt is also made to produce the mortars by completely replacing the M Sand with KM soil. Further, the properties of the concrete blocks and mortars prepared with KM soil are assessed and compared with the ones prepared with M Sand. Also, the performance of the stack bonded masonry prisms like compressive strength and bond strength in shear is assessed for the various masonry prism prepared with combinations of the Concrete block masonry units and mortars. The results indicate that the stack bonded masonry prism assemblies with KM soil both in cement mortar and concrete block have performed moderately well in compressive strength and shear bond strength in comparison with the one prepared with M Sand. 

G Sarangapani

Papers

Brick-Mortar Bond and Masonry Compressive Strength

Characteristics of Masonry Prepared with KM Soil as Fine Aggregate in Cement Mortar and Concrete Block