Johnson's Materials of ConstructionJohn Wiley & Sons, Incorporated, 1918 - 840 halaman |
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Edisi yang lain - Lihat semua
Istilah dan frasa umum
aggregate alloy annealing apparatus average axis bars beam bending brick briquettes brittle cast iron cells cementite cent clay columns compressive strength concrete cooling cross-section curve cylinder deflection deformation determined diameter Douglas fir ductility effect elastic limit elongation Engr extensometer fiber freezing furnace grain hard hardening heartwood heat hydraulic increase kiln less lime limestone load longleaf longleaf pine material maximum measured metal method mixing modulus of elasticity modulus of rupture moisture mold mortar oxide pearlite percentage pine pith-rays plane plate pores Portland cement produced proportion radial ratio resistance sand sapwood shaft shearing stress shown in Fig shrinkage sieve silicon slag specific gravity specimen square inch standard steel stone structure summer wood surface Table temperature tensile strength tension test-piece testing machine timber tion torsion tracheids transverse ultimate strength unit stress vary weight Western larch wire wrought iron
Bagian yang populer
Halaman 368 - Sufficient cement shall be drawn from the discharge openings to obtain samples representative of the cement contained in the bin, as determined by the appearance at the discharge openings of indicators placed on the surface of the cement directly above these openings before drawing of the cement is started.
Halaman 295 - Portland cement is the product obtained by finely pulverizing clinker produced by calcining to incipient fusion an intimate and properly proportioned mixture of argillaceous and calcareous materials, with no additions subsequent to calcination excepting water and calcined or uncalcined gypsum.
Halaman 377 - ... sliced off at the top of the ring by a single oblique stroke of a trowel held at a slight angle with the top of the ring. During these operations care shall be taken not to compress the paste. The paste confined in the ring, resting on the plate, shall be...
Halaman 377 - 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.
Halaman 377 - C being 1 cm in diameter for a distance of 6 cm, the other having a removable needle D, 1 mm in diameter, 6 cm long. The rod is reversible, and can be held in any desired position by a screw E, and has midway between the ends a mark F which moves under a scale (graduated to millimeters) attached to the frame A. The paste is held in a rigid conical ring, resting on a glass plate about 10 cm square.
Halaman 806 - Ib. (0.43 kg.) each. In general, the number of small spheres in a charge shall not fall below 245 nor exceed 260. The collective weight of the large and small spheres shall be as nearly 300 Ib.
Halaman 391 - If a wooden box is used, the interior should be covered with felt or broad wicking kept wet. The bottom of the moist closet should be covered with water. The interior of the closet should be provided with non-absorbent shelves on which to place the test pieces, the shelves being so arranged that they may be withdrawn readily.
Halaman 391 - The briquettes shall be kept in molds on glass plates in the moist closet for at least 20 hours. After 24 hours in moist air the briquettes shall be immersed in clean water in storage tanks of non-corroding material.
Halaman 372 - The No. 200 sieve should have 200 wires per inch, and the number of wires in any whole inch shall not be outside the limits of 192 to 208. No opening between adjacent parallel wires shall be more than 0.0050 in.
Halaman 807 - The length, width and thickness of the bricks. 10. The collective weight of the ten large spherical shot used in making the test at the time of their last standardization. 11. The number and collective weight of the small spherical shot used in making the test at the time of their last standardization. 12. The total weight of the shot charge, after its last standardization. 13. Certificate of the operator that he examined the condition of the machine as to staves, liners...