The RMC Research & Education Foundation has released its latest research report on pervious concrete, "Portland Cement Pervious Concrete Pavement: Field Performance Investigation on Parking Lot and Roadway Pavements."

Because of the limited tensile strength and brittleness of ultra high performance concrete, it was natural for researchers to investigate the use of steel fibers to overcome these deficiencies. The characteristics of each of the three major types of ultra high performance fiber-reinforced concrete are described, and the current state of the research into each type is summarized.

If the dumping height is too large for the construction procedures, mixture, and reinforcement congestion, the most evident defects are honeycombs. To provide a tool to define an acceptable dumping height that will assure that the amount of honeycombing is within a permissible limit, the Concrete Casting Committee of the Instituto del Cemento y del Hormigón de Chile (ICH) developed Technical Specification ET 002-05, “Dumping Height of Concrete when Casting Vertical Elements.” This performance specification allows greater dumping heights that can lead to greater productivity without compromising the quality of the product.