Browsing by Subject "Waste products as road materials"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Item Characterization of waste recycled glass as a highway material(Texas Tech University, 1996-08) Viswanathan, KrishnanThe success of glass recycling programs has resulted in an oversupply of waste recycled glass or glass cullet. The properties and strength of glass cullet aggregate mixes are influenced by maximum size of cullet, cullet content in the mix, type of conventional aggregate, and also the debris level in the cullet. A survey of State DOTs was done to determine their experiences with the use of glass cullet. Also, a survey among suppliers of cullet in Texas was done to determine the costs associated with procuring glass cullet. Based on these surveys, glass cullet was identified for use in base course, subbase, subgrade and embankments and also for backfill applications. A test program was devised to test the engineering suitability of glass cullet samples for the above mentioned applications. Stripping tests were also done to determine the adhesion of glass cullet and asphalt in the presence of water. Based on the results of these tests, it was found that glass cullet has properties similar to natural aggregates and could be used as a highway material. Specifications for use of glass cullet by the Texas Department of Transportation were also developed.Item Influence of construction water quality on the performance of road base and subbase materials(Texas Tech University, 2004-08) Bhongir, Chandra PrakashIn some parts of Texas, during periods of draught and increased construction works, water has become a precious commodity, especially for areas in the state which receive very little rainfall. This puts the construction projects on-hold, which requires large quantities of water. One way to reduce the demand for drinking water is to substitute non-drinking quality water in construction applications. However, there may be some adverse impacts of using alternative water in construction applications. The research included the study of most critical concerns that would arise when water from alternative water sources is used in the construction of road bases and subbases. These concerns are: (a) the potential impact that soluble minerals in alternative water may have on soil parameters that are used in material selection (i.e., Atterberg Limits and Bar Linear Shrinkage) and (b) the effect that sulfate ions in water may have on the potential for sulfate heave in base layers stabilized with calcium-based stabilizers. A comprehensive test program was undertaken selecting five different soils, which would cover the broad range of soil types found within the geographic parts of Texas. The types of alternative water used were Treated Effluent from Wastewater Treatment Plants, Ocean Water, and Brine Water, each having different concentrations of salinity and sulfates. The soil samples were tested with and without adding alternative water to evaluate the impact of alternative water on the soil samples. A predictive model was developed that would allow preliminary evaluation of candidate alternative water sources to determine their suitability.Item Use of glass cullet in roadway construction(Texas Tech University, 1996-12) Woolverton, Amanda BinliNot available