182 



CEMENTS, LIMES, AND PLASTERS. 



TABLE 75. 

 ANALYSES OF KILN PRODUCTS, TEIL, FRANCE. 



of 1.08, as shown by analysis No. 2, which is of the Teil lime in its com- 

 mercial form. During the burning a small percentage of a third compound 

 close in composition to CaO.Si0 2 is formed. This product is not used 

 in either the hydraulic-lime or grappier-cement industries, but is mixed 

 with slaked lime and used in the manufacture of pipe, tile, etc. It is, 

 in fact, an artificial puzzolana, as is seen from its analysis (No. 4), 

 which gives a Cementation Index of 2.82. 



These analyses by Durand-Claye have been used because they form 

 a complete series. They are not entirely representative, however, of 

 Teil hydraulic lime, as is seen on comparing them with analyses No. 2 

 and 3 in Table 76, below. These latter analyses give Cementation 

 Indexes of 0.841 and 0.854 respectively, which are considerably lower 

 than of the corresponding analyses of Table 75. 



TABLE 76. 

 ANALYSES OP HYDRAULIC LIMES, AFTER SLAKING. 



1. Typical hydraulic lime, after slaking. Le Chatelier, Trans. Am. Inst. Min. Engrs., vol. 22, 

 p. 16. 



2. Hydrauljc lime of Teil, after slaking. Thorpe, Diet. Applied Chem., vol. 1, p. 474. 



3. Hydraulic lime of Teil. after slaking. Gillmore, "Limes, Cements, and Mortars", p. 125, 



Weight and specific gravity. Beckwith states that Teil lime in 

 lumps, before slaking, weighs 36^ Ibs. per cubic foot; while slaked 



