The sanitation of domestic buildings / by Frank Latham.

  • Latham, Frank.
Date:
[1898]
Catalogue details

Licence: Public Domain Mark

Credit: The sanitation of domestic buildings / by Frank Latham. Source: Wellcome Collection.

    33/168 (page 17)
    •cement is likely to blow. At the same time it should not be worked up a second time. In practice, it will be found that the addition of a small quantity of clean, sharp sand, used with discretion with the cement is beneficial, as the joints are not so likely to crack as when made with neat cement. The writer has had cases where, after drains have been satisfactorily laid, Fig. 5. the joints on becoming set have blown and cracked owing to the heat of the cement, and thus render- ing the drain defective. Concrete for drainage works should be composed of one part Portland cement well mixed while dry with six parts of good, sharp, clean gravel, or Thames ballast, the stones not to be larger any way than will pass through a 2in. ring, and to have a proportion of sand or fine gravel which will only just fill in the interstices of the large materials. Often it is found necessary to carry a drain over