The Mexican mining journal . November. 1915. MEXICAN MININC JOURNAL. 407. 408 MEXICAN MINING JOÜRNAL. November, 1915. The briquets of both conditions were tested at theend of one, and one-half and six months respectively,and the results compared. A Rhiele testing machine and briquet moulds havinga sectional area at the breaking point of one squareinch were used so that no calculations were neces-sary. The cement used came from the Concrete Plant,Concrete, Colorado, of the United States Portland Ce-ment Co. through the kindness of Mr. J. E. Zahn. Tensile strength, pounds per square inch, air fo
The Mexican mining journal . November. 1915. MEXICAN MININC JOURNAL. 407. 408 MEXICAN MINING JOÜRNAL. November, 1915. The briquets of both conditions were tested at theend of one, and one-half and six months respectively,and the results compared. A Rhiele testing machine and briquet moulds havinga sectional area at the breaking point of one squareinch were used so that no calculations were neces-sary. The cement used came from the Concrete Plant,Concrete, Colorado, of the United States Portland Ce-ment Co. through the kindness of Mr. J. E. Zahn. Tensile strength, pounds per square inch, air forone and one-half months.) CaS04 310 Na2SOg i/2 290 „ 1 280 „ 220 „ 2 254 „ 3 308 „ 4 282 „ 5 304 l/2 290 „ 1 286 „ H/2 212 „ 2 285 „ 3 „ 4 270 „ 5 252 324 290283 335420 338280 384266 342286 315283 300318 290225 330294 255292 327276 246345 267355 376203 270 285 302325 235 286 292552 307 320 336315 346 376 320334 330 210 290310 395 280 316306 380 280 305250 350 352 311 417 344378265 288272 320206 368257 390375 265 286 315402 323244 27028
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
