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Pearl-Chain Bridge technology is a new prefabricated arch solution for highway bridges. This study investigates the feasibility of pervious concrete as a filling material in Pearl-Chain Bridges. The study is divided into two steps: 1) small-scale tests where the variation in vertical void distribution and strength properties is determined for 800 mm high blocks cast in different numbers of layers, and 2) full-scale implementation in a 26 m long Pearl-Chain Bridge. With a layer thickness of 27 cm, the small-scale tests indicated homogenous results; however, for the full-scale implementation, the same degree of homogeneity was not shown.

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Microwave heating in the fabrication process of high quality quartz fibers for telecommunication is described. In this process tubes and rods of ultrapure quartz are heated to temperatures above 2000 °C.High quality fibers, referring to both optical attenuation and geometrical properties, have been manufactured. The homogeneous nature of microwave heating results in a significantly decreased production time per fiberkilometer.Measurements of the most important materials parameter, the dielecric loss factor of quartz as function of temperature and frequency, are presented.