Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 282
pound, and a ^^^-inchvvire loaded to weigh 1 pound. When the cement bears the liglitweight, it is said to have begun to set; when it bears the hea^7 weight,it is said to have entirely set. The apparatus employed for thistestis shown in Fig. 1, and is called Vicats Needle apparatus. … Fig. 1. Vicafs Needle Apparatus. Quick and Slow Setting. The aluminous natural cementsare commonly quick-setting, though not always so, as those con-taining a considerable percentage of sulphuric acid may set quiteslowly. The magnesian and Portland varieties may be either quick or slow. Specimens…
Architecture · Building · Carpentry
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