Cement and ConcreteMcGraw, 1907 - 572 sayfa |
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Diğer baskılar - Tümünü görüntüle
Sık kullanılan terimler ve kelime öbekleri
28 days adhesive strength AGE OF BRIQUETS arch barrel beam blocks Brand brick broken stone cement and sand cement by weight cents per cubic Chief of Engineers clay coarse particles cohesive compressive compressive strength concrete consistency construction crete crusher cubic foot cubic yard diameter effect Engineering Fahr feet filled four gaging give given grains grams gravel grinding hardening immersed inch square kiln layer lime paste limestone loose machine magnesia materials meshes method mixer mixture modulus of elasticity moist mold months mortars containing natural cement mortar neat cement one-half pass percentage plaster plaster of Paris Point aux Pins Portland cement mortar Portland mortar POUNDS PER SQUARE proportions quartz regaged rods samples setting side sieve sifting silica specific gravity specimens SQUARE INCH steel stress surface Table tamping temperature TENSILE STRENGTH three parts sand tion usually voids volume walls wire
Popüler pasajlar
Sayfa 555 - Pats of neat cement about three inches in diameter, one-half inch thick at the center, and tapering to a thin edge, shall be kept in moist air for a period of twenty-four hours.
Sayfa 550 - 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.
Sayfa 560 - The precipitate shall be dissolved in a small quantity of hot hydrochloric acid, the solution diluted to about 100 cc, 1 cc of a saturated solution of sodium-ammonium-hydrogen phosphate added, and ammonia drop by drop, with constant stirring, until the precipitate is again formed as described and the ammonia is in moderate excess. The precipitate shall then be allowed to stand about two hours, filtered and washed as before.
Sayfa 559 - The precipitate and filter are placed wet in a platinum crucible, and the paper burned off over a small flame of a Bunsen burner.
Sayfa 544 - The neck has a diameter of about 9 mm. (0.35 in.), and is graduated into tenths of cubic centimeters above the mark F.
Sayfa 556 - It shall leave by weight a residue of not more than 8 per cent on the No. 100, and not more than 25 per cent on the No. 200 sieve. TIME OF SETTING 21. It shall develop initial set...
Sayfa 543 - Apparatus and Method. — The determination of specific gravity is most conveniently made with Le Chatelier's apparatus. This consists of a flask (D), Fig.
Sayfa 552 - For these tests, pats aboutTi cm. (2.95 ins.) in diameter, 1J cm. (0.49 in.) thick at the center, and tapering to a thin edge, should be made upon a clean glass plate about 10 cm. (3.94 ins.) square, from cement paste of normal consistency. Normal Test — A pat is immersed in water maintained as near 21° Cent.
Sayfa 543 - ... 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.
Sayfa 554 - The cement shall be stored in such a manner as to permit easy access for proper inspection and identification of each shipment, and in a suitable weather-tight building which will protect the cement from dampness.