[Trade Journal]
Publication: Engineering Bulletin Purdue University
Lafayette, IN, United States
vol. 21, no. 4, p. 13-14,19-20,23,26-27, col. 1
RESEARCH SERIES NO. 57
ENGINEERING EXPERIMENT STATION
REPORT
OF THE
RESEARCH AND EXTENSION
ACTIVITIES
OF THE
ENGINEERING SCHOOLS AND DEPARTMENTS
FOR THE SESSIONS OF
1936-1937
A A. POTTER
Director
Engineering Experiment Station
Engineering Extension Department
W. A. KNAPP
Secretary
Engineering Experiment Station
Engineering Extension Department
PURDUE UNIVERSITY
Lafayette. Indiana
JULY, 1937
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RESEARCHES CARRIED ON BY THE ENGINEERING
EXPERIMENT STATION
AND THE ENGINEERING SCHOOLS AND
DEPARTMENTS
July 1, 1935, to June 30, 1936
Engineering researches was carried on by the Engineering Experiment Station and the several schools and departments and by undergraduate and graduate students.
A. Researches of the Engineering Experiment Station included:
(a) Station research
(b) Co-operative research — direct with the industry
(c) Co-operative research — through the Purdue Research Foundation.
(d) Service and commercial tests.
B. Researches of the schools and departments included:
(a) Staff researches
(b) Graduate researches
(c) Undergraduate researches.
The report that follows includes brief progress reports on all active research investigations carried on by the Engineering Experiment Station and by the several engineering schools and departments for the period of July 1, 1935, to June 30, 1936. The reports are grouped under the several divisions of the Engineering Experiment Station corresponding to the teaching divisions of the engineering schools and departments. Researches caried on under the direct supervision of the Director of the Engineering Experiment Station are reported under the Administrative Division.
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CIVIL ENGINEERING DIVISION
W. K. Hatt in charge
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Hollow Glass Block Research (Project C-29). Co-operative research for the Owens-Illinois Glass Company, started in July, 1935. Investigators, R. B. Crepps and R. E. Mills.
Purpose. To study the physical and mechanical properties of hollow glass blocks as individual units and also when used for masonry units.
Progress Report. A complete series of tests was run on Insulux glass blocks manufactured by the Owens-Illinois Glass Company. The final reports included the following tests:
(a) Compressive strength tests of individual glass block units after several annealing conditions.
(b) Compressive strength tests of glass block masonry panels.
(c) Adhesion of masonry mortar to glass block to determine the effect of different film-coating materials and the effect of freezing and thawing of the mortar joint. These tests were of both tension and shear of mortar joints.
(d) Transmission of ponded water through Insulux masonry mortar joints.
(e) Transverse strength tests of a 7‘-8" x 8‘-7" glass block panel.
(f) Measurement of contraction and expansion and joint movement of large Insulux masonry panels (at Muncie Plant).
(g) Transverse strength tests of Insulux masonry wall panels and a comparative test of a common brick wall panel.
(h) Compressive strength tests of small, solid glass prisms.
(i) Measurement of the elastic deformation of Insulux masonry wall panels when subjected to repeated transverse loadings.
(j) Measurement of the relative stiffness of tubular stiffeners as used with Insulux masonry with metal tubes as plain units and when filled with masonry mortar.
(k) Weathering effect of mortar joints for six different masonry cements to determine the adhesion of masonry mortar to Insulux glass blocks after one year of exposure to the weather.
(1) Studies of elastic qualities of caulking mastic for inside and outside exposures.
(m) Fire test of several Insulux masonry wall panels conducted at the plant of the Owens-Illinois Glass Company at Muncie, Indiana.
In general this investigation has established, numerous strength values and limits for use in the architectural design and construction of glass block masonry.
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ELECTRICAL ENGINEERING DIVISION
C. F. Harding in charge
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High-Frequency Electrical Characteristics of Glass. Co-operative research for the Owens-Illinois Glass Co., started in September, 1936. Investigators, C. B. Aiken and G. K. Miller.
Purpose. To determine the electrical characteristics of glass at frequencies from 1,000 to 1,000,000 cycles per second and to assist the Committee on Electric Insulating Materials of the American Society for Testing Materials in formulating standard methods of test.
Progress Report. A high-frequency bridge has been set up and a guard-ring circuit built into it. Corrections for stray capacities have been developed and careful checks made of the accuracy of the complete apparatus. A chamber for control of temperature and humidity has been constructed and a micrometer built for measuring the thickness of the samples.
Measurements of dielectric constant and power factor have been made at frequencies from 1,000 to 30,000 cycles per second. The effects of humidity and temperature have been quantitatively determined. The A.S.T.M. round robin group of glass samples has been tested at frequencies up to 30,000 cycles per second.
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Commercial and Service Tests. The Electrical Engineering Division of the Engineering Experiment Station has conducted the following routine commercial and service tests during the period of July 1, 1936, to June 30, 1937, with C. S. Sprague in charge:
For Whom Nature of Test
Owens-Illinois Glass Co. Radio interference tests
Lapp Insulator Co. Sixty-cycle and impulse flashover tests
Rostone Products Volume and surface resistivity
Owens-Illinois Glass Co. Radio interference and dry and wet flashover tests
Owens-Illinois Glass Co. Radio interference tests
Iowa Electric Light and Power Co. Tests of lightning "spill gap"
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MECHANICAL ENGINEERING DIVISION
G. A. Young in charge
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Determination of the "U" Factor in Glass Building Blocks (Project M-96). Co-operative research for the Owens-Illinois Glass Company, started in September, 1935. Investigators, T. K. Sanders and W. T. Miller.
Purpose. Research on the properties of glass building blocks and thermal insulation.
Progress Report. Extensive tests have been conducted to determine the effect of vibration upon the placement and density of glass wool insulations. Samples of various thicknesses and types 30" wide and 8' high were put through vibration tests of a frequency of 200 per minute, amplitude of 1 1/4", and 2,000,000 cycles.
Thermal conductivities have been determined by means of the hot-box method for glass blocks, sky-light sections, and blanket insulation.
Solar heat penetration has been determined for walls constructed of glass blocks with various face cuttings; the effect of shading upon the solar heat penetration also was determined.
Preparations are being made for hot-plate testing and for refrigerator insulation testing.
Commercial or Service Tests. During the past school year, 1936-37, the following commercial or service tests have been run in the laboratories of the School of Mechanical Engineering.
For Whom Nature of Test
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Owens-Illinois Glass Co. Heat transfer constant for glass brick
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