| 释义 |
laitance|ˈleɪtəns|
Also (erron.) laitence.
[Fr.]
A milky scum appearing on the surface of freshly laid cement.
1909Taylor & Thompson Treat. Concrete (ed. 2) xv. 303 The milky laitance which appears on concrete laid under water represents an actual loss of cement. 1930Engineering 23 May 677/3 The value of carefully providing for the adequate junction between successive layers and the elimination of laitance. 1939Archit. Rev. LXXXV. 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. 1968D. 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. |