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Pallesthesia (\ˌpal-es-ˈthē-zh(ē-)ə\), or vibratory sensation, is the ability to perceive vibration. [ 1 ] [ 2 ] This sensation, often conducted through skin and bone, is usually generated by mechanoreceptors such as Pacinian corpuscles , Merkel disk receptors, and tactile corpuscles . [ 1 ]
A procedure for ultrasonic testing is outlined in ASTM C597 - 09. [9]In India, till 2018 ultrasonic testing was conducted according to IS 13311-1992.From 2018, procedure and specification for Ultrasonic pulse velocity test is outlined in IS 516 Part 5:Non destructive testing of concrete Section 1:Ultrasonic Pulse Velocity Testing.
Crosshole sonic logging (CSL) is a method to determine the structural integrity of drilled shafts and other concrete piles. The CSL method is considered to be more accurate than sonic echo testing in the determination of structural soundness of concrete within the drilled shaft inside of the rebar cage. This method provides little indication of ...
BS 1881:204 Testing concrete. Recommendations on the use of electromagnetic covermeters; DGZfP:B2: Guideline “für Bewehrungsnachweis und Überdeckungsmessung bei Stahl- und Spannbeton” DIN 1045: Guideline Concrete, reinforced and prestressed concrete structures; ACI Concrete Practices Non Destructive testing 228.2R-2.51: Covermeters
The Hopkinson pressure bar was first suggested by Bertram Hopkinson in 1914 [1] as a way to measure stress pulse propagation in a metal bar. Later, in 1949 Herbert Kolsky [2] refined Hopkinson's technique by using two Hopkinson bars in series, now known as the split-Hopkinson bar, to measure stress and strain, incorporating advancements in the cathode ray oscilloscope in conjunction with ...
Rutting: formation of low spots in pavement along the direction of travel usually in the wheel path [5] Shoving: a washboard like effect transverse to the direction of travel [5] Ride quality: uneven road surface such as swells, bumps, sags, or depressions [2] Damage: resulting from accidents and/or fires [6]
MICP has been shown to prolong concrete service life due to calcium carbonate precipitation. The calcium carbonate heals the concrete by solidifying on the cracked concrete surface, mimicking the process by which bone fractures in human body are healed by osteoblast cells that mineralize to reform the bone. [ 36 ]
Triaxial apparatus with sample attached ready for testing. In materials science, a triaxial shear test is a common method to measure the mechanical properties of many deformable solids, especially soil (e.g., sand, clay) and rock, and other granular materials or powders.