Potential gains through welded-wire fabric reinforcement

Article Abstract:

The use of traditional steel reinforcing bars is one of the most labor-intensive construction activities. So that unproductive labor and equipment hours may be minimized, prefabricated meshes known as welded wire fabric (WWF) or welded-steel mesh can be shipped to construction sites and cut to size for use in bridge decks and walkways. A feasibility study and cost evaluation of WWF asprimary reinforcement for bridge decks implies that this innovation offers considerable savings in time and cost. Placement methods and productivity improvement plans are also presented.

Evaluation, Reinforced concrete, Reinforced concrete, Fiber, Fiber reinforced concrete

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Long ago, a river ran through it

Article Abstract:

Univ of Arizona researchers have found evidence of a huge river that existed during the late Triassic period 225 million years ago. Microscopic zircon crystals found in a semarid region near Amarillo, TX, were precisely dated to indicate the river's age.

Rivers, Pangea (Geology), Pangaea

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'Java Man' gains (and loses) a consort

Article Abstract:

Physical anthropologist Donald Tyler and geologist Sastrohamijoyo Sartono reported recovering the skull of a female 1.4 million-year-old Homo erectus, but later revised the specimen's age. The skull's ancestry is also in question.

Pithecanthropus erectus, Homo erectus

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