« ÖncekiDevam »
Method used with material that passes -inch screen.
Outline of investigations...
Analyses of constituent materials
Silt and other materials.
Analysis of steel.
Investigations of columns and floor slabs....
The effect of electrolysis and sea water on cement mortars and concretes
Progress of the work..
Page. Plate I. General view of buildings occupied by structural-materials test
20 III. A, 40,000-pound hydraulic hand-power compression machine; B,
Accelerated test apparatus for soundness tests of cement; C, Attach-
22 IV. A, Method of handling void apparatus; B, Hopper for filling void apparatus
24 V. A, Apparatus for determining percentage of voids; B, Apparatus and connections for making void test on s'one-size” material
24 VI. A, Apparatus and connections for determining specific gravity of sand
and screenings; B, Apparatus for removing silt from stone screen-
28 VIII. A, Implements used in making density tests of mortars; B, Cast-iron
cube and cylinder molds; C, Spherical bearing blocks for com-
30 IX. A, Typical failure of concrete cylinder; B, Failure of concrete cyl
inder-rupture through aggregate; C, Compressometers for meas-
48 XI. A, Apparatus for finishing top of bond-test specimens; B, Beam
selected at random to show accuracy of rod spacing; C, Gang saw
50 XII. Room for molding beams..
50 XIII. Interior view of moist room for storage of test pieces.
52 XIV. Interior view of testing room, beam section.... XV. A, Plain-concrete beam in testing machine with deformeters in
place and stirrups for supporting beam at third points; B, Re-
54 XVI. A, Attachment and micrometer for measuring slip of rods; B, Steel carriage for handling beams.
56 XVII. Method of recording character of reinforced-concrete beam failures.. 56 XVIII. A, Henning steel extensometer for measuring elongation of steel; B, Method of making bond test....
64 XIX. A, Shear specimen in machine ready for test; B, Interior view of storage room, building-block section..
PLATE XX. Interior view of the mixing and molding and the testing rooms,
half of building block in machine ready for compression test...
cation of water jet to test panel after fire treatment.
and method of supporting test pieces. Fig. 1. General plan of buildings.....
2. Diagrams showing details of reenforcement of beams.
9 48 58 62 66 67 74