Measurement of Stress in Sandstone Blockwork Using Flat Jacks

Author R.C.DE VEKEY and J.S. SKANDAMOORTHY Building Research Establishment Abstract The flat jack is a flat flexible envelope which is filled with hydraulic fluid and can be pressurised using a pump and used to generate small movements in structures and apply...

The Effect of Age on the Deformation of Masonry

Author *J.J.BROOKS, **C.S.ABDULLAH, **+J.P.FORTH AND ***P.R.BINGEL, * University of Leeds ** Universiti Tecknologi Malaysia *** Leeds Metropolitan University Abstract Modulus of elasticity and creep test data are presented for masonry subjected to load at ages ranging...

Numerical Study of Failure Initiation in Different Joint Shear Tests

Author J.R.RIDDINGTON, K.H.FONG AND P.JUKES University of Sussex Abstract A numerical study of six test methods that have been used to measure masonry joint shear strength indicates that, of these, the Hofmann/Stockl test is theoretically the best. It is not, however,...

Analysis of Thin Composite Masonry Vaults

Author ROBERTO CAPOZUCCA Research Associate l.S.T.C, University of Ancona Abstract Masonry vaults can be of the gravity type, where equilibrium is ensured by the mutual thrust between stone or brickwork blocks, or of the composite type, consisting of layers of...

Investigation into Causes of Persistent Efflorescence on Masonry

Author G.K.BOWLER* and N.B.WINTER** * Hanson Brick Limited** W.H.D. Microanalysis Consultants Limited Abstract Efflorescence was traditionally regarded as temporary. In the last 15 years or so persistent grey white deposits have been seen comprising syngenite or...

The Use of Light Woven Reinforcement for Crack Control

Author G.J.EDGELL CERAM Building Technology Abstract Bed joint reinforcement in designed applications may be used to enhance the wind load resistance of a panel or to provide support over an opening. Non-designed applications generally relate to crack control. Some...

Influence of Cyclic Loads on Brickwork Prestressed Beams

Author ROBERTO CAPOZUCCA and ROBERTA MINNETTI I.S.T.C. University of Ancona Abstract This paper aims to evaluate the influence of cyclic loads on the structural response of brickwork prestressed beams. In fact the reliability of brickwork beams is tied to the...

Numerical and Experimental Evaluation of the Bond Wrench Test

Author W. SAMARASINGHE, S.J. LAWRENCE CSIRO Building, Construction & Engineering, Sydney and A.W. PAGE The University of Newcastle, NSW Abstract The bond wrench test, first developed in Australia, has become the preferred method of evaluating flexural tensile...

Shear Behaviour of Bed Joints at Different Levels of Precompression

Author KLAVS FEILBERG HANSEN* ESA NYKANEN** and FINN R. GOTTFREDSEN* * Danish Building Research Institute ** VTT Building Technology, Espoo, Finland Abstract The results of 26 deformation controlled shear tests with one bed joint between two bricks at different levels...

Influence of Age on Masonry Bond Strength – A Preliminary Study

Author N. DE VITIS* A.W. PAGE* and S.J. LAWRENCE** *The University of Newcastle, NSW **CSIRO-DBCE, North Ryde, NSW Abstract Masonry bond strength is one of the most important and fundamental parameters required for the design of unreinforced masonry structures. Bond...

The Modulus of Elasticity of Masonry

Author J.J. BROOKS and B.H. ABU BAKER University of Leeds Abstract The factors influencing the moduli of elasticity of mortar, bricks and masonry are reviewed in the light of recent research findings and, after establishing modulus/strength relationships for mortar...

Building Mortars Suitable for General Masonry Use

Author D.W. HOBBS British Cement Association Abstract The results of a test programme to investigate the durability performance of building mortars are described. The binders tested were Portland cement, Portland cement and lime, masonry cement which incorporates an...

Creep Tests on Loadbearing Masonry Frames

Author A.J.BELL, M.E.PHIPPS and I.MERCER UMIST Abstract The paper presents results from creep tests on five sub-frames made up from brick or concrete block masonry walls and concrete slabs and compares these results with those from eccentrically loaded walls in the...