Dust Preventives and Road Binders

Voorkant
J. Wiley & sons, 1910 - 416 pagina's
 

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Pagina 98 - Care should be observed in centering the briquettes in the testing machine, as cross-strains, produced by improper centering, tend to lower the breaking strength. The load should not be applied too suddenly, as it may produce vibration, the shock from which often breaks the briquette before the ultimate strength is reached. Care must be taken that the clips and the sides of the briquette be clean and free from grains of sand or dirt, which would prevent a good bearing. The load should be applied...
Pagina 95 - The .sand and cement should be thoroughly mixed dry. The mixing should be done on some non-absorbing surface, preferably plate glass. If the mixing must be done on 'an absorbing surface it should be thoroughly dampened prior to use.

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