| Description |
v, 107 leaves : illustrations, photographs ; 29 cm |
| Summary |
"It is the purpose of this investigation to determine, by tests conducted on normal pavement concretes placed on prepared subgrades, the daily cycles of length changes with temperature variation, and also to determine the longtime changes in length of slabs on subgrades with moisture and evaporation variables approximating those of normal highway slabs. Each slab will be subjected to a known, relatively constant, average intensity of prestress. In accord with the above purpose, the primary objective of this project is to determine overall length changes for daily and seasonal cyclic changes of temperature and moisture on short sections of prestressed concrete slabs. The slabs will be placed in outside exposure on prepared highway subbases. A secondary objective of this project is to investigate changes in one-directional warping measurements along the length of these slabs. This will be done under the different intensities of average known prestress for daily and seasonal changes in slab temperature and moisture"--Introduction, leaf 5. |
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