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  2. Roman concrete - Wikipedia

    en.wikipedia.org/wiki/Roman_concrete

    The addition of ash prevented cracks from spreading. Recent research has shown that the incorporation of mixtures of different types of lime, forming conglomerate "clasts" allowed the concrete to self-repair cracks. [1] Roman concrete was in widespread use from about 150 BC; [2] some scholars believe it was developed a century before that. [3]

  3. Travertine - Wikipedia

    en.wikipedia.org/wiki/Travertine

    Travertine terraces at Mammoth Hot Springs, Yellowstone National Park, in 2016 Calcium-carbonate-encrusted, growing moss in a low-temperature freshwater travertine formation (1 euro coin for scale) Travertine ( / ˈ t r æ v ər t iː n / TRAV -ər-teen ) [ 1 ] is a form of terrestrial limestone deposited around mineral springs , especially hot ...

  4. Crack arrestor - Wikipedia

    en.wikipedia.org/wiki/Crack_arrestor

    A crack arrestor (otherwise known as a rip-stop doubler) is a structural engineering device. Being typically shaped into ring or strip, and composed of a strong material, it serves to contain stress corrosion cracking or fatigue cracking, helping to prevent the catastrophic failure of a device.

  5. Self-healing concrete - Wikipedia

    en.wikipedia.org/wiki/Self-healing_concrete

    Autogenous self-healing crack. Self-healing concrete is characterized as the capability of concrete to fix its cracks on its own autogenously or autonomously. It not only seals the cracks but also partially or entirely recovers the mechanical properties of the structural elements. This kind of concrete is also known as self-repairing concrete.

  6. Pros and cons of credit repair: What to know before you start

    www.aol.com/finance/pros-cons-credit-repair-know...

    The cons of credit repair services As with all financial offers, credit repair services come with a set of potential downsides. Consider these carefully before engaging with a credit repair company.

  7. Repair kit - Wikipedia

    en.wikipedia.org/wiki/Repair_kit

    A repair kit or service kit is a set of items used to repair a device, commonly comprising both tools and spare parts. Many kits are designed for vehicles, such as cars, boats, airplanes, motorbikes, and bicycles, and may be kept with the vehicle in order to make on-the-spot repairs.

  8. Dye penetrant inspection - Wikipedia

    en.wikipedia.org/wiki/Dye_penetrant_inspection

    Dye penetrant inspection (DP), also called liquid penetrate inspection (LPI) or penetrant testing (PT), is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials (metals, plastics, or ceramics).

  9. Flowstone - Wikipedia

    en.wikipedia.org/wiki/Flowstone

    Travertine is a calcium carbonate deposit often formed in creeks or rivers; its nature is laminated, and it includes such structures as stalagmites and stalactites. The deposits may grade into thin sheets called " draperies " or "curtains" where they descend from overhanging portions of the wall.