PLATE I. General view of buildings occupied by structural-materials testing laboratories
II. Interior views of constituent-materials laboratory.
III. A, 40,000-pound hydraulic hand-power compression machine; B,
Accelerated test apparatus for soundness tests of cement; C, Attach-
ment for testing short transverse test pieces on Olsen long-lever
cement-testing machine..
IV. A, Method of handling void apparatus; B, Hopper for filling void
apparatus
V. A, Apparatus for determining percentage of voids; B, Apparatus and
connections for making void test on "one-size" material
VI. A, Apparatus and connections for determining specific gravity of sand
and screenings; B, Apparatus for removing silt from stone screen-
ings; C, Apparatus and connections for determining specific gravity
of large material .
VII. A, Bumping screen for making granulometric analysis; B, Method
of filling one screen with material retained on another.
VIII. A, Implements used in making density tests of mortars; B, Cast-iron
cube and cylinder molds; C, Spherical bearing blocks for com-
pression tests..
IX. A, Typical failure of concrete cylinder; B, Failure of concrete cyl-
inder-rupture through aggregate; C, Compressometers for meas-
uring deformations of cylinders; D, Typical cones formed by
rupture of concrete cylinders.
X. A, 200,000-pound compression machine; B, Concrete mixer, charg-
ing end, 1 cubic yard capacity....
XI. A, Apparatus for finishing top of bond-test specimens; B, Beam
selected at random to show accuracy of rod spacing; C, Gang saw
for cutting cubes from blocks of stone..
XII. Room for molding beams.
XIII. Interior view of moist room for storage of test pieces..
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-
inforced-concrete beam in testing machine ready for application
of load
XVI. A, Attachment and micrometer for measuring slip of rods; B, Steel carriage for handling beams.
XVII. Method of recording character of reinforced-concrete beam failures..
XVIII. A, Henning steel extensometer for measuring elongation of steel;
B, Method of making bond test..
XIX. A, Shear specimen in machine ready for test; B, Interior view of storage room, building-block section..