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A inflexible pavement is taken into account to be any pavement approach that includes as one aspect portland cement concrete, both non-reinforced or bolstered. This 1984 handbook presents information for the layout of military airfield inflexible pavement at U.S. military mobilization installations. This guide is restricted to military airfield pavement layout specifications for plane in the course of a mobilization state of affairs.

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Example text

The latter factor can be easily determined; however, very little reliable information is available regarding the sliding resistance of concrete on the various foundation materials. For this design procedure, the sliding resistance has been assumed to be constant for a JRC pavement cast either directly on the subgrade, on a stabilized or nonstabilized base course, or on an existing flexible pavement. The maximum allowable width W or length L of JRC pavement slab will be determined from the following equation: The formula above has been expressed on the nomograph (fig 3-1) for steel yield strengths fs of 56,000 and 60,000 psi and the maximum W or L can be obtained from the intersection of a straight line drawn between the values of hdr and S that will be used for the JRC pavement.

If the computed deflection is larger than the allowable deflection, the thickness must be increased or a new design initiated with a different value for either R or k. The process must be repeated until a thickness based upon the limiting stress criterion will also have a computed deflection equal to or less than the allowable value. :1 U. S. Army Corps of Engineers FIGURE 4-1. FIBROUS CONCRETE PAVEMENT DESIGN CURVES FOR ARMY CLASS I PAVEMENTS 4-3 . EM 1110-3-142 9 Apr 84 KK I ~ ~~ ~ Is... "" ~~ II II II I I Ill I I I .

Army Corps of Engineers FIGURE 3-2. TYPICAL LAYOUTS SHOWING REINFORCEMENT OF ODD-SHAPED SLAPS AND MISMATCHED JOINTS 3-5 EM 1110-3-142 9 Apr 84 are being constructed concurrently, the slabs on both sides of the juncture opposite mismatched joints will be reinforced in the manner described above. For this condition shown in figure 3-2, the slip joint bond-breaking medium can be specified to be a full 1/4 inch thick, and the reinforcing may be omitted. (2) The second condition of mismatched joints where reinforcement is required occurs in the construction of a JC overlay of an existing rigid pavement.

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