Previous research has shown that using fine lightweight aggregate (FLWA) can be a promising strategy to mitigate alkali-silica reaction (ASR) in mortar and concrete. While several possible theories were proposed by researchers, discrepancies in testing methods, materials, and supporting evidence still exist. Therefore, this study was initiated. There are two...
Using recycled concrete aggregate (RCA) as a replacement for natural aggregate in new concrete is a promising way to increase the overall sustainability of new concrete. This has been hindered, however, by a general perception that RCA is a sub-standard material due to the lack of technical guidance, specifically related...
Impending shortages of high-quality aggregates in areas along the Oregon coast have forced users to search for new sources of supply. A number of feasible methods exist for supplying the affected areas. Three of these alternatives are: (1) importation, either by truck, rail, or barge; (2) the use of good-quality...
Coastal Oregon is deficient in quality construction aggregates.
There is, however, an abundance of lower quality, or marginal, aggregate
available for construction purposes. An evaluation of these marginal
aggregates is the purpose of this paper.
There are four classes of marginal rocks found on the Oregon Coast.
Basalts, high in...
The wood-based building products industry has experienced significant turbulence over the past several decades as a function of multiple forces including among others globalization, product and process innovation, and shifting customer and consumer interest and demands. Collectively, these changes have challenged the historical tenets which have defined industry strategy and...
Need for increased outlets for common boards led to a study of lalllinated bevel siding.
Low-grade boards of Douglas fir and ponderosa pine were bonded with exterior glue to veneer covering and resin-fiber overlay to form panels subsequently ripped to width and bevel-sawed into siding,
Grooves in the lumber core,...
The natural reserves of high quality construction aggregates found along the Oregon coast are being depleted. The impending shortages are compounded by restrictions being placed on existing aggregate sources because of energy. economic, and environmental considerations, and zoning regulations. A current solution for the shortage is to import quality aggregate...