Practical Cement TestingM.C. Clark, 1905 - 320 Seiten |
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24 hours 28 days accelerated tests adulteration alumina amount apparatus average barrel beaker benzine boiling test brand burning calcination calcium carbonate carbonic acid cement testing cent chemical clinker concrete cracks crucible damp closet determination diameter disintegration employed error Fahr filter fineness flask gauge give grams grinding gypsum hard set hardening hydrated hydrochloric acid initial set iron kilns Left glass less lime limestone load machine magnesia manufacture ment method mills minutes mixed mixture moist air mortar moulds natural cement neat briquettes neat cement normal consistency obtained operation particles pass placed Portland cement pounds Pozzuolana practice precipitate produce quantity residue sample sand briquettes sand mortar shipment shown in Fig sieve sifting silica similar slag Society of Civil solution specific gravity specimen square inch sulphate sulphuric acid Table temperature tensile strength tests of cement tion trowel tube uniform Vicat needle washed weight wire
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Seite 183 - All tests shall be made in accordance with the methods proposed by the Committee on Uniform Tests of Cement...
Seite 279 - The minimum requirements for tensile strength for briquettes one inch square in section shall be within the following limits, and shall show no retrogression in strength within the periods specified.
Seite 300 - This term is applied to the finely pulverized product resulting from the calcination to incipient fusion of an intimate mixture of properly proportioned argillaceous and calcareous materials, and to which no addition greater than 3 per cent has been made subsequent to calcination.
Seite 95 - Paragraph 58, and quickly formed into a ball with the hands, completing the operation by tossing it six times from one hand to the other, maintained 6 ins. apart; the ball is then pressed into the rubber ring, through the larger opening, smoothed off, and placed (on its large end) on a glass plate and the smaller end smoothed off with a trowel...
Seite 291 - The sand and cement should be thoroughly mixed dry. The mixing should be done on some non-absorbing surface, preferably plate glass. If the mixing must be done on an absorbing surface it should be thoroughly dampened prior to use.
Seite 302 - The cement shall be considered to have acquired its initial set when the pat will bear, without appreciable indentation, the Gillmore Mm I needle ^ in.
Seite 286 - The neck has a diameter of about 9 mm. (0.35 in.), and is graduated into tenths of cubic centimeters above the mark (F).
Seite 286 - ... long; in the middle of this neck is a bulb (C), above and below which are two marks, F and E; the volume between these marks is 20 cu. cm. (1.22 cu.
Seite 295 - HC1 which is then diluted to half strength or less, or upon the residue may be poured at once a larger volume of acid of half strength. The dish is then covered and digestion allowed to go on for 10 minutes on the bath, after which the solution is filtered and the separated silica washed thoroughly with water.