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- All Subjects: Pollen, Fossil
- All Subjects: Pavements--Performance
- Creators: Schoenwetter, James
- Creators: United States. Department of Transportation
There are many factors that affect the durability of Portland cement concrete (PCC), including the mix design and the materials used, the quality of construction, and the environment. Durability is not an intrinsic property of the concrete, but instead is related to how the material interacts with the environment. Durability-related deterioration is referred to as materials-related distress (MRD). Common MRDs include those caused by physical processes, such as freezing and thawing, or chemical processes, such as alkali-silica reactivity (ASR) and sulfate attack. This research project was undertaken to determine whether concrete used in the ADOT system is experiencing, or is potentially susceptible to, ASR or sulfate attack, and if so, to what degree.
Draft of report published in A.H. Schroeder, 1965, Anthropological Papers of the Department of Anthropology, University of Utah, Misc. Coll. Papers 75; 10: 85-110. Pilot study of 3 pollen samples suggests pollen chronology developed for Northern Arizona and New Mexico portions of the Colorado Plateau not applicable to SE Utah.
Complacent pollen records associated with both extinct fauna and archaeological remains argues that Southwest has been semi-arid throughout Late- and Post-Pleistocene.
Unpublished report, 1964
Pilot study of 3 pollen samples allows vegetation pattern reconstruction for period of occupation and suggests successful maize farming required water control technology.
This study of 23 pollen samples allows recognition of a sequence of ecosystem changes occurring in central New Mexico between A.D. 1280 and 1400 and also in the 1650 - 1750 period. It also discusses the effects of such changes on aboriginal maize agriculture. Draft of the report included in Archaeological Excavations at Pueblo del Encierro.