Construction

  • Infrastructure protectionHumble bacteria help create self-healing concrete

    Scientists use a ground-borne bacteria — bacilli megaterium — to create calcite, a crystalline form of natural calcium carbonate; this can then be used to block the concrete’s pores, keeping out water and other damaging substances to prolong the life of the concrete

  • Infrastructure protectionSensing technology helps prevent construction accidents

    Researchers have developed a system that employs remote sensing technology to improve safety on construction sites by using tracking tags to monitor movements in real-time

  • Infrastructure protectionNew Iowa bridge equipped with damage-detection gauges

    A new Iowa bridge is equipped with sensors which provide a large amount of quantitative information about the bridge’s performance and condition; these gauges take 100 readings a second for corrosion, strain, surface conditions, moisture within the steel arch, and structure movements over time; the bridge is also equipped to monitor the security of the structure and to record surveillance video; it is a structure monitoring model that could be used for other new bridges, including much larger ones

  • InfrastructureU.S. aging bridges in critical condition

    There are an estimated 18,000 bridges in the United States that are classed as fracture-critical bridges, requiring continual inspections; the need for increased inspection and maintenance runs against shrinking state and federal budgets for infrastructure improvements; bridges must also be closed for maintenance – but at least for that there is now a solution: instant bridges

  • InfrastructureBridges get a quick check-up with new imaging technique

    EPFL engineers have developed a new imaging technique which allows engineers  to see the insides of massive concrete bridges; much like a sonogram, this technique provides quick, easy-to-interpret images, so that the health of these expensive structures can be assessed and monitored

  • EarthquakesCalifornia quake test shows promise of new building code

    Researchers place a model hospital on a shake table to assess the structure’s ability to withstand earthquake; in accordance with California latest building code, base isolators, which are rubber bearings intended to absorb the shock of the motion, were installed underneath the structure; the hospital passed the 6.7-magnitude and 8.8-magnitude tests with flying colors

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  • SimulationSimulations helps overcome design challenges

    Simulation software can pull volumes of complex data beyond simple measurements (think comparative load or stress tolerances) and layer that information into images; simulation can show how a bridge will perform based on how it is used, the conditions around it, its design, materials, and even variables such as the position of a joint — before a single component is manufactured or ground is broken

  • Copper theftNICB warns of growing copper thefts

    A recently released report by the National Insurance Crime Bureau (NICB) concludes that copper and other metal thefts are on the rise once again in the United States

  • Rare Earth elementsU.S. files trade charges against China over rare minerals

    China mines and sells about 97 percent of the world’s rare Earth elements – seventeen metals used in cell phones, advanced batteries, wind turbines, and more; the Chinese, in  violation of WTO rules, have manipulated the export of these minerals in order to weaken the techno logy sectors of other countries, and punish countries over political disputes

  • InfrastructureNew material for sustainable road building: "poticrete"

    An organization dedicated to promoting sustainable roadway construction, awarded its first official certification to a Bellingham, Washington, project that incorporates porcelain from recycled toilets; a newly widened sidewalk in Bellingham incorporates more than 400 recycled toilets, crushed into what the project engineers have dubbed “poticrete”

  • Infrastructure protectionRobots to climb and assemble structures, making construction safer

    In the near future, armies of robots could nimbly be crawling up towers and skyscrapers to make repairs, so humans do not have to; the design of the truss pieces, which have ridges and specially designed locks so the robot can manipulate them, is as important as the robot itself, and researchers express the hopes that in the future such robot-friendly building components would be standardized for widespread use

  • Infrastructure protectionPhysicists predict when brittle materials fail

    It does not happen often, but structures like bridges, airplanes, and buildings do fail, sometimes catastrophically; what are the odds, and how can it be prevented? Researchers just published new theoretical insights into the probability of structural failures, based on hundreds of thousands of computer simulations

  • InfrastructureRecycled glass in cement makes concrete stronger

    Researchers have found that by mixing ground waste glass into the cement that is used to make concrete, the concrete is stronger, more durable, and more resistant to water; in addition, the use of glass helps reduce the amount of glass that ends up in landfills

  • Infrastructure protectionShape-memory alloys for earthquake-resistant structures

    To improve the performance of structures during earthquakes, researchers have been investigating the use of “smart” materials, such as shape-memory alloys, which can bounce back after experiencing large loads

  • Infrastructure protectionSmart paint monitors structural safety

    An innovative low-cost smart paint that can detect microscopic faults in wind turbines, mines, and bridges before structural damage occurs; the environmentally friendly paint uses nanotechnology to detect movement in large structures, and could shape the future of safety monitoring