laitancen.

/ˈleɪtəns/

Forms: Also (irregular) laitence.

Etymology: French.

A milky scum appearing on the surface of freshly laid cement.

ΘΚΠ

society > occupation and work > industry > building or constructing > surfacing or cladding > [noun] > scum on freshly laid cement

laitance1909

the world > physical sensation > cleanness and dirtiness > dirtiness > pollution or defilement > [noun] > specific impurities > scum > types of scum

motherc1485

froth1541

motheriness1742

laitance1909

1909 F. W. Taylor & S. E. Thompson Treat. Concrete (ed. 2) xv. 303 The milky laitance which appears on concrete laid under water represents an actual loss of cement.

1930 Engineering 23 May 677/3 The value of carefully providing for the adequate junction between successive layers and the elimination of laitance.

1939 Archit. Rev. 85 267 First is the way in which the tile is fixed to its backing, due to insufficient soaking of both the tile and the rendering, robbing the cement of the water necessary for proper hydration; ‘killing’ the cement by re-mixing new and old compo that has already started to set; ‘laitence’, a white scum of water and cement which forms on the surface of the bed of floor tiles, if it is pressed up and down too much while the tiles are being levelled.

1968 D. C. Tibbetts in E. G. Swenson Performance of Concrete (1969) x. 168 Laitance was removed and necessary holes cut in the sides of the cylinders for the setting of the low water ends of the concrete braces.

This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2022).

单词	laitance
释义	laitancen. /ˈleɪtəns/ Forms: Also (irregular) laitence. Etymology: French. A milky scum appearing on the surface of freshly laid cement. ΘΚΠ society > occupation and work > industry > building or constructing > surfacing or cladding > [noun] > scum on freshly laid cement laitance1909 the world > physical sensation > cleanness and dirtiness > dirtiness > pollution or defilement > [noun] > specific impurities > scum > types of scum motherc1485 froth1541 motheriness1742 laitance1909 1909 F. W. Taylor & S. E. Thompson Treat. Concrete (ed. 2) xv. 303 The milky laitance which appears on concrete laid under water represents an actual loss of cement. 1930 Engineering 23 May 677/3 The value of carefully providing for the adequate junction between successive layers and the elimination of laitance. 1939 Archit. Rev. 85 267 First is the way in which the tile is fixed to its backing, due to insufficient soaking of both the tile and the rendering, robbing the cement of the water necessary for proper hydration; ‘killing’ the cement by re-mixing new and old compo that has already started to set; ‘laitence’, a white scum of water and cement which forms on the surface of the bed of floor tiles, if it is pressed up and down too much while the tiles are being levelled. 1968 D. C. Tibbetts in E. G. Swenson Performance of Concrete (1969) x. 168 Laitance was removed and necessary holes cut in the sides of the cylinders for the setting of the low water ends of the concrete braces. This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2022). < n.1909
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