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Crazing is a spider web pattern of cracks penetrating the glaze. It is caused by tensile stresses greater than the glaze is able to withstand. [1] [2] Common reasons for such stresses are: a mismatch between the thermal expansions of glaze and body; from moisture expansion of the body; and in the case of glazed tiles fixed to a wall, movement of the wall or of the bonding material used to fix ...
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).
A reading below this measure means the floor is soft and can crack under pressure. The next step is the initial grinding. In this step, low grit diamonds (e.g. 16- to 20-grit) are used to grind down all uneven surface until the floor is flat. [2] The next step is patching. Normally, all concrete floors have cracks.
Unlike cracks, crazes can transmit load between their two faces through these fibrils. Crazes typically initiate when applied tensile stress causes microvoids to nucleate at points of high stress concentration within the polymer, such as those created by scratches, flaws, cracks, dust particles, and molecular heterogeneities.
In older properties, hairline cracks in plastered ceilings can occur due to minor deflection / movement of timber joists which support the floor above. [3] Traditionally, crack propagation was arrested by stirring chopped horsehair thoroughly into the plaster mix.
Australian airline Qantas Airways said Friday that it grounded three of its Boeing 737s over hairline cracks in wing structures but expects the planes to be repaired and flying again before the ...
Virgin Australia crew members were allegedly sexually assaulted and robbed in one of Fiji's nightclub areas on New Year's Day, the island country's Deputy Prime Minister Viliame Gavoka announced.
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