This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ...T/ME /Af MWC/TES Figure 15.--Diagram showing temperature conditions in the furnace and at the back of panel 14. Tem perature: Maximum, 51; minimum, 40; mean, 48. Relative humidity: 7 a. m., 97; 7 p.m., 94. Direc tion of prevailing wind, northeast. Curves showing the variations of temperature observed during the test ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ...T/ME /Af MWC/TES Figure 15.--Diagram showing temperature conditions in the furnace and at the back of panel 14. Tem perature: Maximum, 51; minimum, 40; mean, 48. Relative humidity: 7 a. m., 97; 7 p.m., 94. Direc tion of prevailing wind, northeast. Curves showing the variations of temperature observed during the test are given in figure 16. Results.--In removing the panel from the furnace it failed to slide clear, and consequently a strip about 10 inches wide on the left side was not exposed to the direct stream of water. The 1:2 mixture spalled to a depth of about J to i inch, the 1:4 to about f inch to 2 inches, and the 1:8 about the same as the 1:4. On all the 1:2 specimens portions of the surface remained intact, but were covered with small hair cracks and could be easily crumbled with the fingers. The remainder of the blocks were hard, but in every case they were badly cracked and pitted. This was particularly true of the 1:8 mixtures. One block of a 1:8 mixture, in the seventh row, right-hand side, was cracked on the back side. This was the only specimen which cracked in this manner in any of the tests on mortar blocks. Plate XX, A, shows the face of the wall after firing, and Plate XX, B, shows the condition of the wall while being dismantled. On taking down the panel it was found that all the bfocks except one 1:8 block had cracked across the web at the fired side. One web of this block was cracked on the fired side, while the other cracked across to the back side of the block. The faces of all the 1:8 blocks crumbled and fell to pieces when removed from the panel, and a few of the 1:4 blocks were found to be cracked through the fired side. This was also found to be the case with one of the 1:2 blocks. The portions of the blocks on the fired side wer...
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