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Recommended Papers for: Dale P. Bentz

Total Papers Found: 12

Increasing the Service Life of Bridge Decks by Incorporating Phase-Change Materials to Reduce Freeze-Thaw Cycles

The effects of incorporating phase change materials (PCMs) into concrete on the potential service lives of bridges were investigated. It was determined that PCMs could potentially be used in the future to reduce the effects of freeze-thaw cycles on bridges, but more work needed to be done to improve the strength of concretes containing PCMs before this could be applied. It was determined that increasing the latent heat of fusion ...

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Determining thermal properties of gypsum board at elevated temperatures 

Gypsum board is a building material that shrinks and cracks at high temperatures, which compromises the structural integrity of buildings during fires. Researchers in this study set out to determine the behavior of gypsum board when exposed to real fire conditions. A Thermal Constants Analyzer (TPS) measured the thermal conductivity of the gypsum board samples at and above room temperature using the transient plane source (TPS) technique. Results showed that ...

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Thermal Properties and Thermal Modeling of Ballistic Clay Box

In order to test the protective capabilities of body armor, a clay box is placed behind the armor during testing and the penetration depth into the clay is measured after firing. Procedures for the preparation of the Plastilina clay used to make these boxes require that the clay be pre-conditioned in an oven prior to testing. The objectives of this work were to determine if the cooling of the clay ...

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Thermal properties of high-volume fly ash mortars and concretes

In this study, three series of high-volume fly ash (HVFA) mortars and concretes were studied using the transient plane source (TPS) technique. Each series of sample contained varying weight % of fly ash from 0 to 75%. The three sample sets were prepared by different laboratories and the results were compared. Thermal conductivity and specific heat capacity were measured, and the authors detailed their method of doing this. It was determined that the ...

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Combination of Transient Plane Source and Slug Calorimeter Measurements to Estimate the Thermal Properties of Fire Resistive Materials

Using a combination of transient plane source (TPS) technique and slug calorimetry, 4 commercially available fire resistive materials (FRMs) are studied from room temperature to 1000°C. The materials studied in this report are two gypsum-based and two calcium-silicate based materials. These materials are heterogeneous and thus when heated to elevated temperatures, the microstructure of the materials may be compromised and various reactions and phase changes may take place over the course ...