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Influence of geometry on creep and moisture movement of clay, calcium silicate and concrete masonry

By Che Sobry Abdulla


This investigation involved creep and moisture movement\ud measurements for about six months on 13-course clay (Engineering class B) and calcium silicate brickwork, and 5-course concrete blockwork, consecutively. Four different geometries of masonry were built, namely: single-leaf wall, cavity wall, hollow pier and solid pier, respectively having volume/surface area (V/S) ratios of 44,51,78 and 112 mm. Deformations were also measured on one-brick wide 5 or 6-stack high model brickwalls which were partly sealed to simulate the V/S ratios of the corresponding 13-course\ud brickwork. At the same time, deformations were also measured on individual mortar prisms and brick or block units in order to verify composite model expressions for\ud predicting masonry movements. Simulation of moisture diffusion of the corresponding mortarjoints and embedded bricks or block were made in terms of V/S ratio by partial\ud sealing of the individual mortar prisms and brick or block units.\ud \ud The tests reveal that the modulus of elasticity to be independent of masonry geometry. However, there is a clear influence of geometry on the vertical ultimate creep and moisture movement of all the masonry types i,.e. creep and shrinkage increase with a decrease of V/S ratio. A similar trend occurs for horizontal shrinkage except for the\ud clay brickwork which undergoes moisture expansion. Deformations of the model walls show reasonable agreement with the 13-course brickwork.\ud \ud When results of individual mortar and brick/block specimens are inserted in composite models,the predicted strains\ud show good agreement with the measured strains, particularly in the vertical direction.\ud \ud There is no consistent pattern in the distribution of load and moisture strains for the different masonry geometries,\ud and the measurements reveal that actual strains can be up to 100% higher than the average strains

Publisher: School of Civil Engineering (Leeds)
Year: 1989
OAI identifier: oai:etheses.whiterose.ac.uk:600

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  1. (1982). 1. Effect of temperature and relative humidity on creep in brickwork.
  2. (1984). 318-83. Building Code requirements for reinforced concrete, Part 3: Use of concrete in building - Design, specifications, and related topics, ACI Manual of concrete practice, doi
  3. (1988). A composite modelfor masonry shrinkage.
  4. A creep-time function for single brickwork walls.
  5. (1978). A design guidefor reinforced andprestressedbrickwork.
  6. A method ofcomputing creep and shrinkage deformation ofconcreteforpractical purposes,
  7. (1988). A methodfor assessing the long term moisture expansion characteristic of clay bricks.
  8. (1978). A model for the in-plane deformations and failure of brickwork. Engineering Bulletin
  9. (1977). A theoretical methodfor predicting the shrinkage of concrete.
  10. (1988). Anisotropy in extruded clay units and its effect on masonry behaviour.
  11. Auswirkungen des superposions prinzips auf kriechund - Probleme vei beton und spannbeton.
  12. (1978). Behaviour of concrete masonry structures.
  13. Civil Engineering Materials. doi
  14. (1960). Comparison ofdrying shrinkage ofautoclaved and air-cured concrete at different humidities. RILEM
  15. (1988). Composite model prediction of the geometry effect on creep and shrinkage of clay brickwork.
  16. (1987). Composite modelling of elasticity and creep of masonry.
  17. (1987). Composite modelling of moisture movement and thermal movement of masonry.
  18. (1990). Composite modelling ofmasonry deformation. Paper to be published
  19. Composite modelling ofthe geometry influence on creep and shrinkage ofcalcium silicate brickwork. Paper for the Second Int. Masonry Conference,
  20. (1986). CompositeModelsforPredicting ElasticandLong TermMovements inBrickwork Walls. Masonry (1),
  21. Compressive tests on 113 and 116 scale model brickwork piers and walls.
  22. Concrete creep data, doi
  23. Creep and drying shrinkage of concrete blockwork. Paper for Magazine of Concrete Research. doi
  24. Creep and Moisture Movements in Brickwork and Blockwork.
  25. Creep and moisture movements in brickwork wall.
  26. (1976). Creep and Moisture Movements in masonry piers and walls.
  27. (1986). Creep and prestress losses in brick masonry.
  28. (1984). Creep and shrinkage in stressed clay brickwork.
  29. (1958). Creep for concrete. doi
  30. (1978). Creep in brickwork and blockwork in cavity walls andpiers.
  31. Creep in brickwork with and without damp proof course.
  32. (1970). Creep in brickwork. doi
  33. (1974). Creep in concrete blockwork piers.
  34. (1983). Creep of Plain and Structural Concrete.
  35. (1969). Creep on model brickwork. Designing engineering and constructing with masonry products. Gulf Publication,
  36. (1978). Deformation of masonry due to shrinkage and creep.
  37. (1982). Design for movement in clay brickwork in the UK.
  38. Designfor movement in buildings.
  39. (1976). Determination of stress-strain relationship of brickwork. British Ceramic Research Assoc.,
  40. (1983). Dinnie A and Sharpes A B. Movement ofbrickwork -A review of2l years experience.
  41. (1937). Drying shrinkage oflarge members.
  42. (1978). Drysdale RG and Heidebrecht A C. Effect ofgrouting on the strength characteristics ofconcrete block masonry.
  43. (1981). Early-age thermal crack control in concrete.
  44. (1975). Effect of stress on creep in brickwork piers.
  45. (1957). Effect of wall perforations on floor slab loads and floor slab deformations in multi-storey houses. Nordisk Betong,
  46. Effects of time dependent movement in composite and post-tensioned masonry.
  47. (1978). Elastic and creep properties of masonry.
  48. elastic and creepproperties ofconcrete masonry.
  49. Elastic, creep and shrinkage behaviour of masonry.
  50. (1988). Elasticity and strength of clay brickwork test units.
  51. (1975). Elements of load-bearing Brickwork. doi
  52. Experimental investigation on structural performance of brick masonry prisms.
  53. (1980). Failure modes for eccentrically loaded concrete block masonry walls. doi
  54. Free shrinkage of concrete mortar. T and A.
  55. Fundamentalfactors in drying shrinkage of concrete block.
  56. (1973). Fundamentalproperties ofstructural brickwork.
  57. Fur Normung, DIN 1053: Part 2,1984. Masonry: Masonry design on the basis ofsuitably tests. Design and Construction.
  58. (1968). Further crushing tests on storey-height walls 4S inch thick.
  59. (1965). Further results of shrinkage and creep tests.
  60. Geometry effect on creep and moisture movements of brickwork. Publication for Masonry International.
  61. (1980). Guide to Creep. SCP 17, Structural Clay Product Ltd,
  62. (1965). High pressure steam curing: Modern practice, and properties of autoclave products. doi
  63. (1979). I Stress-strain behaviour of masonry walls.
  64. (1985). I The loss of prestress in post-tensional brick masonry members.
  65. (1965). IDesign of creep machines for brickwork.
  66. In-situ measurement ofcreep movement in a brick masonry tower block.
  67. (1959). Influence des dimensions et des tensions sur le retrait et lefluage du beton,
  68. Influence of aggregate properties on concrete shrinkage.
  69. Influence of mortar and block properties on shrinkage cracking of masonry.
  70. Influence of Size and Shape of Member on the Shrinkage of Concrete.
  71. (1985). Influence of Size on Moisture Movements in Unrestrained Masonry.
  72. (1977). Influence of specimen geometry upon weight change and shrinkage of air-dried concrete specimens. doi
  73. Influence ofmortar and blockproperties on shrinkage cracking ofmasonry walls.
  74. (1978). Inherent compressive and tensile strengths of structural bricks.
  75. (1978). Institution, doi
  76. Institution, BS 1881: Part 116: 1983. Method of determining of compressive strength of concrete cubes.
  77. (1980). Institution, BS 4551: 1980. Method of testing mortars, screeds andplasters. BSI,
  78. (1985). Institution, BS 5628: Part 2: 1985. Use of masonry: Part 2: Structural use of reinforced and prestresses masonry,
  79. Institution, BS 6073: Part 1: 1981. Specificatonfor precast concrete masonry units,
  80. (1976). Institution, BS1200: 1976. Building sandsfrom natural sources,
  81. (1973). Institution. CP 121: Part 1,1973. Walling - Brick and block masonry. BSI London
  82. (1970). International recommendations for the design and construction of concrete structures - Principles and recommendations, doi
  83. (1963). Investigation into failure mechanism of brick masonry under axial compression,
  84. (1983). Investigations into a methodfor assessing the long term moisture expansion in clay bricks.
  85. Limit states design -a probabilistic study. doi
  86. (1973). Loss ofsteel stresses in prestressed concrete blockwork walls.
  87. (1983). Measurement of the creep strain distribution in axially loaded brickwork wall.
  88. (1988). Mechanical behaviour of brick masonries derived from unit and mortar characteristics.
  89. Mechanical behaviour of concrete as a composite material.
  90. Mechanical behaviour ofconcrete as a composite material.
  91. (1978). Model code for concrete structures, doi
  92. Modelling the deformations of masonry.
  93. (1984). Modelsfor long term deformation of brickwork.
  94. Modulus of elasticity of concrete as affected by elastic moduli of cement paste matrix and aggregate. doi
  95. Modulus ofelasticity oftrickwork.
  96. (1983). Moisture expansion in clay masonry.
  97. Moisture expansion of structural ceramics: Expansion of unrestrained Fletton brickwork,
  98. Moisture movement in clay brickwork :a review.
  99. Moisture movement in concrete masonry :a review.
  100. Moisture movement of bricks and brickwork.
  101. (1984). Moisture movements in brickwork and blockwork.
  102. (1988). Moistureproftles in drying concrete.
  103. Movement of brickwork.
  104. Movements in Buildings. Pergamon Press, 2nd edition,
  105. (1988). N Creep in brickwork walls at high and low stresseslstrength ratio.
  106. (1986). Non-linear moisture profiles and shrinkage in concrete members. doi
  107. Non-linear water diffitsion in non-saturated concrete.
  108. (1978). Nunn R0 and Moothy T V. Prism testsfor compressive strength ofconcrete masonry.
  109. Practicalformulation ofshrinkage and creep ofconcrete.
  110. Prediction of elastic behaviour of masonry. The int.
  111. (1986). Prediction ofcreep, shrinkage and temperature effects in concrete structures, Part 1: Materials and generalproperties ofconcrete. ACI Manual of Concrete Practice, reapproved
  112. (1960). Prediction ofelastic constants ofmultiphase materials. Transaction of the Metallic Society,
  113. (1987). shrinkage - Size and age at loading effects. doi
  114. Shrinkage measurement of concrete
  115. Simplified prediction of concrete creep from strength and mix. Structural Engineering
  116. (1944). size and shrinkage. Concrete and Constructional Eng.
  117. (1962). Some problems on creep in ordinary and reinforced masonry members.
  118. Steady-state stresses in concrete structures subjected to sustained temperatures and loads. doi
  119. Strength and Elastic Properties of the 9-in Brickwork Cube. doi
  120. (1989). Strength and elasticity of calcium silicate and concrete masonry. Paper to be presented at the
  121. (1932). Strength and stability of concrete masonry walls.
  122. (1971). Strength of load bearing masonry walls.
  123. (1975). Strength relatedproperties ofbrickmasonry.
  124. (1980). Stress-strain relationships for brickwork. Their application in the theory of unreinforced slender members. British Ceram. Research Assoc.,
  125. (1969). Structural Clay Products Institute (SCPI) Recommended practicefor engineered brick masonry,
  126. Structural Masonry.
  127. (1965). Study of creep in concrete.
  128. (1975). The analysis of creep datafor brickwork.
  129. The dependence ofbulk modulus, Young's modulus, creep, shrinkage and thermal expansion of concrete upon aggregate volume and concentration. doi
  130. The effect of brickwork bond on the load-bearing capacity of model brickwalls,
  131. (1971). The effect of joint thickness and other factors on compressive strength of brickwork,
  132. (1964). The effect of the elastic modulus of the aggregate on the elastic modulus, creep and creep recovery of concrete. doi
  133. (1978). The effect ofstrength andgeometry on the elastic and creepproperfies ofmasonry members.
  134. (1971). The influence of specimen geometry upon weight change and shrinkage of air-dried mortar specimens. doi
  135. The role of creep in brickwork. doi
  136. (1974). The Specification for Clay.
  137. (1972). The strength of concrete block walls, Phase II: Under Axial loading. Cement and Concrete Association,
  138. (1968). Theories ofmultiphase materials applied to concrete, cement mortar and cement paste.
  139. Time-Dependant Behaviour of Calcium Silicate and Fletton Clay Brickwork Walls.
  140. (1959). Waters EH andLewis RE. Thepermanent moisture axpansion oftlayproducts. I Bricks,
  141. (1987). Working documents for TC179, revised

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