. Concrete UNIVERSAL PORTLAND CEMENT CO. 69 Home-made Molds:—The mold shown in Figure 51 is a modifi- cation of that used by Wm. Stoll of Lansing, Mich., to construct blocks for his silo during the summer of 1907. It can be used to make blocks of any length up to 24 inches and of any width up to 8 inches. The height of the blocks may be 8 inches or less. The mold can be made from a piece of old railroad tie 30 inches long, 8 inches wide and 6>^ inches high sawed on the arc of a circle, with a diameter 4 inches greater than that of the inside of the silo. One-half-inch holes are dri
. Concrete UNIVERSAL PORTLAND CEMENT CO. 69 Home-made Molds:—The mold shown in Figure 51 is a modifi- cation of that used by Wm. Stoll of Lansing, Mich., to construct blocks for his silo during the summer of 1907. It can be used to make blocks of any length up to 24 inches and of any width up to 8 inches. The height of the blocks may be 8 inches or less. The mold can be made from a piece of old railroad tie 30 inches long, 8 inches wide and 6>^ inches high sawed on the arc of a circle, with a diameter 4 inches greater than that of the inside of the silo. One-half-inch holes are drilled V/z inches from each end to receive 18-inch bolts, by which the sides of the mold are held at the desired distance apart. The end pieces are made of 1-inch planed lumber and have tapered wooden blocks 8 inches long, 5 inches wide and %-inch thick screwed to them for the purpose of making end cores on the blocks. The end pieces are held in place by wedge-shaped wooden blocks inserted between them and the bolts. If hollow blocks are desired, the air spaces may be provided by cores made of tapered 4x4" pieces. The inside of the mold should be well greased before use to prevent the concrete from sticking. Size of Block:—Although concrete blocks are made in a large variety of sizes, those most commonly used in silo work are 8 inches high, 8 inches thick and either 16 or 24 inches long, with half and quarter lengths as required. Blocks of these sizes are recommended as preferable to those less than 8 inches in height which require more labor to lay, or blocks more than 8 inches in height which are un- handy because of their weight. r. Fig. 54. Concrete silo and dairy barn, University ut iSebraska Agricultural School, Lincoln, Neb. Construction of this type is frequent among the state agricultural colleges; fully a score have concrete silos,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - color
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