Abstract
THE annual report of the Building Research Board for 1933 (London: H.M. Stationery Office, 2s. 6d. net) contains an account of several interesting investi gations. The failure of lime-plaster ceilings on lathing, whilst of frequent occurrence, is not generally due to defective materials, but to hasty work and disturbance by other types of work in the building at a time when the plaster ceilings are very sensitive to vibration. Damp walls are often caused by pene tration of rain through fine cracks between the bricks and mortar. Most colourless waterproofing materials are ineffective, but an imitation stone paint showed a good resistance to weathering. Experiments on heating showed that intermittent heating from 9.30 a.m. to 5.30 p.m. required only three quarters of the electrical energy for continuous heating, although the latter method has been said by heating engineers to be equally economical. Testing of bricks by exposure, and of concrete piles by an ingenious piezoelectric method, are described.
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Recent Research in Building Practice. Nature 133, 492 (1934). https://doi.org/10.1038/133492a0
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DOI: https://doi.org/10.1038/133492a0