On the range of composition of Portland cement (1914) (14576711130)

Identifier: onrangeofcomposi00shum (find matches)
Title: On the range of composition of Portland cement
Year: 1914 (1910s)
Authors: Shum, Nim Chi
Subjects: Portland cement Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Text Appearing Before Image:
in brass molds having a cross sectionof one square inch at the middle. One hundred prams of cement wasweighed out end immediately worked np to the normal consistency.The paste was placed in a mould, pressed firmly by fingers andsmoothed off with a trowel. The mould was turned over and smoothedoff. After standing for a few minutes, the bricuette was removedfrom the m^uld and allowed to stand in moist air for twenty-fourhours. The briauette was then immersed in water at a constanttenperature (21°C.) for a reriod of six days. The briquette wastested in a standard tensile test machine. The results are re-corded in the following table: Tensile Strength in lbs. - 7 days test.1. 2. 3. 4. 5. a. No strength No Strength Ho strength Ho strength 160 b. B n 158 c. 16£ Av. 160 Av. 6. 7. 8. 9. 10. a. 195 Ho strength Ho strength 215 188 b. 222 H n 218 200 c. 229 tf n 221 210 215 215 199 11. 12 12. 14. 15. a. 138 227 190 320 145 b. 131 238 168 310 165 c. 142 233 204 260 154Av. ~T57 236 184 303_ TSI
Text Appearing After Image:
25. •4- M CNJ O CO cm to r

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