Colorimetric Test for Organic Impurities in Sands
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Mohr 's pipette, graduated in 1/10 cc. . . . 50 $14. 00 CONCLUDING REMARKS.
Impurities in sands other than organic, such as clay or similar admixtures, if present in considerable quantities, may be ex- pected to affect the strength of the concrete. However, the examination of a large number of defective sands has shown that it is the organic impurities of a humus nature which are responsible for the abnormally low strengths of such sands. The presence of these impurities can be detected by the ...methods described above.
It has been found that the colorimetric test can be made with a greater degree of uniformity by different operators than can the strength tests of mortars from the same sands.
The fact that the colors produced by digesting certain natural sands with sodium hydroxide are similar to those produced by treating tannic acid in the same manner must not be intepreted to mean that the organic matter in sands is necessarily tannic acid, or even a tannate. The chemical compounds which make up the organic material are probably numerous and complicated.
What to read after Colorimetric Test for Organic Impurities in Sands?
You can find similar books in the "Read Also" column, or choose other free books by Duff a Duff Andrew Abrams to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Mohr 's pipette, graduated in 1/10 cc. . . . 50 $14. 00 CONCLUDING REMARKS.
Impurities in sands other than organic, such as clay or similar admixtures, if present in considerable quantities, may be ex- pected to affect the strength of the concrete. However, the examination of a large number of defective sands has shown that it is the organic impurities of a humus nature which are responsible for the abnormally low strengths of such sands. The presence of these impurities can be detected by the ...methods described above.
It has been found that the colorimetric test can be made with a greater degree of uniformity by different operators than can the strength tests of mortars from the same sands.
The fact that the colors produced by digesting certain natural sands with sodium hydroxide are similar to those produced by treating tannic acid in the same manner must not be intepreted to mean that the organic matter in sands is necessarily tannic acid, or even a tannate. The chemical compounds which make up the organic material are probably numerous and complicated.
What to read after Colorimetric Test for Organic Impurities in Sands?
You can find similar books in the "Read Also" column, or choose other free books by Duff a Duff Andrew Abrams to read onlineMoreLess
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