One of the mysteries of the English language finally explained.
1Break (ore, rock, stone, or concrete) into smaller pieces, especially in preparation for sorting.
- 1.1no object (of ore, rock, or stone) break off in fragments.‘cracks below the surface cause slabs of material to spall off’
break up, break, break into pieces, crack apart, crack open, shatter, splinter, fracture, burst apart, explode, blow apart, implodeView synonyms
- ‘For a uniform ‘flame finish,’ granite is first polished normally, then spalled with a large oxyacetylene burner.’
- ‘You are also to check on incidence of spalling or cracking concrete on the external faces of the buildings and similarly report with recommendations and estimate of cost.’
- ‘Preventing water absorption stops the surface chipping and flaking, or spalling, which eventually ruins so much concrete.’
- ‘Frost fracture, therefore, predominantly affects cortical surfaces, where high porosity allows for absorption of more moisture, producing microcracks, spalling, and frost-potlidding when frozen.’
- ‘Though ornamented with beautiful huge rock-gripping bristlecones, the cliffs tend to spall off in big chunks and the ore body rock where the mine adits go clearly tends to cave in unless aggressively shored up.’
- ‘When the stone peels or flakes along the bedding planes, spalling or exfoliation takes place.’
- ‘The four supports below the main block also bore carving, now spalled beyond precise recognition.’
- ‘Concrete spalls when exposed to elevated temperatures.’
- ‘The elongation of the well bore is the result of compressive shear failure on intersecting conjugate planes, which causes pieces of the borehole wall to spall off.’
- ‘A previous owner had applied a sealant to these walls, trapping water inside that had rusted the rebar and caused the blocks to crack and spall.’
- ‘Water that freezes in a roof tile can cause the material to spall or crack.’
- ‘After cooling the staircase and considerable spalling of the plaster work ceased, crews continued upstairs to finally extinguish the first floor.’
- ‘Altar Q's stone legs are today badly spalled, for they also protected the monument's main block from the same destructive process of groundwater transpiration that left them wrecks.’
- ‘It took a little more than one hour of exposure to ISO 834-at a corresponding ambient temperature of about 1,740°F - for the longitudinal cracks and corner spalling to develop in laboratory test columns.’
- 1.1no object (of ore, rock, or stone) break off in fragments.
A splinter or chip, especially of rock.
piece, bit, particle, speckView synonyms
- ‘A slick finish won't get dusty, but be careful not to get air-entrained concrete where air can get entrapped below the troweled surface, leading to spalls.’
- ‘Any cracks, chips, holes, dips or spalls should be repaired in order to achieve a flat surface.’
- ‘For protection against mines the vehicle is fitted with a floor spall liner and 18 mm armour plate in the floor.’
- ‘A spall liner and mine protection carpet are installed to minimise the secondary effects of armour penetration and mines.’
- ‘He struggled up a steep grade, slipping on the loose spall.’
Late Middle English (as a noun): of unknown origin. The verb dates from the mid 18th century.
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