Specifications for Cement Concrete Paving, Adopted October 14, 1915 These Specifications Will Be Modified from Time to Time to Keep Them Fully Up to Date; Suggestions as to Modifications or Additions Are Solicited and Should Be Sent to the Secretary, Or

Excerpt from Specifications for Cement Concrete Paving, Adopted October 14, 1915: These Specifications Will Be Modified From Time to Time to Keep Them Fully Up to Date; Suggestions as to Modifications or Additions Are Solicited and Should Be Sent to the Secretary, or to William J. Hardee, City Engineer

Fine aggregate shall be of such quality that mortar composed of one (1) part Portland cement and three (3) parts fine aggregate, by weight, when made into briquettes, shall show a tensile strength (at seven (7) and twenty-eight (28) days) at least equal to the strength of briquettes composed of one (1) part of the same cement and three (3) parts Standard Ottawa sand by weight. The per centage of water used in making the briquettes of cement and fine aggregate shall be such as to produce a mortar of the same consistency as that of the Ottawa sand briquettes of Standard consistency. In other respects all tests shall be made in accordance with the Report of Committee on Uniform Tests of Cement of the American Society of Civil Engineers.

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