Study of Type 'A' Asphaltic Concrete Surface Mix Design, R-232, 1968

In some asphaltic concrete mixes asphalt absorption in field mixes is difficult to predict by the routine mix design tests presently being used. Latent or slow absorption in hot mixes is hard to compensate for in field control due to aggregate gradations being near maximum density. If critical asphalt need could be changed by increasing voids in the mineral aggregate so that more freedom could be exercised in compensating for the absorption, this may aid in design. The voids in the mineral aggregate can be related to composite gradation of total aggregate in a mixture, i.e. if a composite gradation of aggregate is finer than that of maximum density curve, the V.M.A. will be greater than that of a mix of maximum density. The typical gradation of Iowa Type 'A' mixes is finer than a gradation which is near the centerline of the specification at sieves larger than the No. 30 and coarser at the lower sieve sizes. The mixes of the typical gradation will have higher V.M.A. than those of the near centerline mixes. By studying properties of the mixes of the typical gradation and comparing them with those of the mixes of maximum density, it may aid in the modification and simplification of our present testing methods and specification requirements while still maintaining control of quality of the mix by controlling voids, stability, gradation and asphalt content.

Condition of the State of Iowa, 1929 (43rd General Assembly)

A transcript of the Condition of the State of Iowa speech by Governor Hammill delivered at the State Capitol.

Governor's Inaugural Address, 1929 (43rd General Assembly)

A transcript of the Governor's Inaugural Address by Governor Hammill.

Discours prononcé par M. Jean-Robert Deschamps-Dumesnil, curé de Saint-Martin...le 23 janvier 1791, pour la prestation du serment, conformément au décret concernant la constitution civile du clergé ([Reprod.])

[Discours. 1791-01-23. Saint-Martin]

Optimum Enforcement Level for Traffic Weight Operations, HR-138, Appendices, 1968

Appendices for HR-138.

Occupational research supplement no. 1 : selected bibliography of Iowa research in vocational-technical education and related areas -- 1963-1968

This is a supplement to the selected bibliography of Iowa research in Vocational-Technical Education and related areas that the Iowa RCU developed. Contract research as well as abstracts of masters theses and doctoral dissertations are included.

Occupational research supplement no. 2 : selected bibliography of Iowa research in vocational-technical education and related areas -- 1966-1968

This is supplement no. 2 to the selected bibliography of Iowa research in Vocational-Technical Education and related areas that the Iowa RCU developed. Contract research as well as abstracts of masters theses and doctoral dissertations are included.

22-10-19, congrès de l'U.V.F. [Union vélocipédique de France, debout, de gauche à droite, Alfred Riguelle, René Mathis, Van Steenbrugghe, Georges Duchesne, et assis, Louis Josset, Georges Chollet, Léon Breton, Schrader, Ernest Delamarre, Tristan Bernard, Claude Martin] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 56597