It was believed that the pH of concrete would affect\r\nthe workability. The effect of pH on the workability was\r\ndetermined experimentally by adding chemical admixtures\r\nto a cement mortar mix, measuring the pH and workability.
\r\n\r\n\r\npH was measured by a Beckman Glass Electrode pH\r\nMeter equipped with a standard Calomel electrode and a \r\nspecial type \"42\" glass electrode. The use of the type \"42\"\r\nglass electrode made it possible to place the electrodes in\r\nwet cement mortar without damage.
\r\n\r\n\r\nThe workability was determined by measuring the \r\npenetration of a three inch diameter cylinder with a \r\nhemispherical tip. This ball penetration measure of workability\r\nhas a linear relationship to that measured by the slump test.
\r\n\r\n\r\nFrom these tests it was found that the pH has no effect\r\non the workability of cement mortar. The admixtures changed\r\nboth the pH and the workability, however, the variations in pH\r\nand workability were independent of each other. It is believed\r\nthat the major factor which affects the workability of concrete\r\nis the dispersing effect of the admixture on the cement.
", "doi": "10.7907/C141-5S39", "publication_date": "1952", "thesis_type": "engd", "thesis_year": "1952" }, { "id": "thesis:10575", "collection": "thesis", "collection_id": "10575", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:12012017-090837077", "primary_object_url": { "basename": "Pauw_A_1952.pdf", "content": "final", "filesize": 87503177, "license": "other", "mime_type": "application/pdf", "url": "/10575/1/Pauw_A_1952.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "A Rational Design Procedure for Machine Foundations", "author": [ { "family_name": "Pauw", "given_name": "Adrian", "clpid": "Pauw-Adrian" } ], "thesis_advisor": [ { "family_name": "Martel", "given_name": "Romeo Raoul", "clpid": "Martel-R-R" }, { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "The problem involved in the design of machine foundations are\r\ndiscussed, followed by a short review of the literature of the subject.\r\nThe general theory of vibration for single and multiple degree of freedom\r\nsystems is briefly reviewed, with special emphasis on its application\r\nto machine foundation design. A procedure for the analysis of machine\r\nfoundations is then developed on the basis of a simplified equivalent\r\nsystem. Procedures for determining the elastic coefficients and the \r\ninertia parameters of the soil are next considered.
\r\n\r\n\r\nThe purpose and extent of the experimental investigations are\r\ndiscussed, followed by a description of the instrumentation used and\r\nthe nature and accuracy of the data obtained. The data is then\r\nanalyzed and checked against the theory presented. The data required for\r\nthe design of machine foundations is discussed, and a procedure for\r\ndesign and analysis is recommended. In conclusion recommendations for\r\nfurther study and research are made.
", "doi": "10.7907/MZVV-X944", "publication_date": "1952", "thesis_type": "phd", "thesis_year": "1952" }, { "id": "thesis:609", "collection": "thesis", "collection_id": "609", "cite_using_url": "https://resolver.caltech.edu/CaltechETD:etd-02112009-154609", "primary_object_url": { "basename": "Ogilvie_dc_1949.pdf", "content": "final", "filesize": 6008003, "license": "other", "mime_type": "application/pdf", "url": "/609/1/Ogilvie_dc_1949.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "Correlation of Existing Design Information on Sandwich Construction", "author": [ { "family_name": "Ogilvie", "given_name": "Douglas Clark", "clpid": "Ogilvie-Douglas-Clark" } ], "thesis_advisor": [ { "family_name": "Sechler", "given_name": "Ernest Edwin", "clpid": "Sechler-E-E" }, { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "GALCIT" }, { "literal": "div_eng" } ], "abstract": "The problem considered is one of survey and correlation of existing design information on sandwich construction. The subject matter deals with the types of sandwiches, advantages, buckling and stress analysis, published test data, design methods, core materials, weight comparisons, current applications and the manufacture, repair and inspection of sandwich construction.\r\n\r\nSuggestions for extensions needed are given and where obvious improvements in analysis could be seen, these modified methods were suggested.\r\n\r\nSuggested further work - Every phase of sandwich construction considered in the present thesis shows need for further development. Particularly useful fields for further work are the development of more adequate stress analysis methods for the core, more general correlation of existing formulas and the development of better means of attachment, inspection and repair.", "doi": "10.7907/F4C5-0536", "publication_date": "1949", "thesis_type": "engd", "thesis_year": "1949" }, { "id": "thesis:1388", "collection": "thesis", "collection_id": "1388", "cite_using_url": "https://resolver.caltech.edu/CaltechETD:etd-04142009-143250", "primary_object_url": { "basename": "Quinlan_pm_1949.pdf", "content": "final", "filesize": 5560214, "license": "other", "mime_type": "application/pdf", "url": "/1388/1/Quinlan_pm_1949.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "A Fourier Integral Approach to an Aeolotropic Medium", "author": [ { "family_name": "Quinlan", "given_name": "Patrick Michael", "clpid": "Quinlan-Patrick-Michael" } ], "thesis_advisor": [ { "family_name": "Martel", "given_name": "Romeo Raoul", "clpid": "Martel-R-R" }, { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "Chapter I: The equations of equilibrium in terms of the displacement components for an axially symmetric aeolotropic medium are developed from the strain-energy function of the medium. Then follows a discussion of the literature of the subject, and an outline of the scope of the present thesis.\r\n\r\nCharter II: The solution is carried through using Fourier Integral technique for the two dimensional plane strain case. Stresses and displacements are obtained for a concentrated line load.\r\n\r\nChapter III: The results of Chapter II are applied to determine the surface settlements, vertical pressures, and shears for a symmetrically loaded strip called \"the unit strip\" of width two units. The following special load distributions are investigated: concentrated, uniform, parabolic, inverted parabolic, hollow wall, and rigid wall. Extension is then made to a strip of any arbitrary width 2a, and settlements are obtained by means of influence factors, (Graph I). An examination is made of the influence of the type of load distribution, demonstrating St. Venant's principle of equipollent loads.\r\n \r\nChapter IV: The equations of Chapter I are solved for an axially symmetric loading by transforming to polar co-ordinates and using Fourier-Bessel Integral technique. The solution is carried through for the concentrated load case, and the results check those given by Mitchell (6).\r\n\r\nChapter V: An investigation similar to that made in Chapter III is made for a loaded circular area of unit radius. The results are then extended to a circle of any arbitrary width a. Surface settlements are obtained quickly by means of influence factors (Graph II). In the latter part of the Chapter series expansions are obtained for the stresses and displacements at any point in the mass, and application is made to some of the more practical load distributions.\r\n\r\nChapter VI: Corresponding results for an elastic isotropic medium, to those given in above chapters, are obtained by the application of a limiting technique to above results. The ease with which the results are obtained is striking. A discussion is given of the infinite surface displacements that are usually obtained in two-dimensional problems.\r\n\r\nChapter VII: In this chapter a review is made of the literature of the three constant medium. The physical significance of the assumptions and the measure of fulfillment of these assumptions by some types of wood, and by some crystals, is examined. Some errors are noted, and corrected. Finally all are shown to be just particular cases of the medium of Chapter II, without having the redeeming feature of simplicity over the more general theory.\r\n\r\nChapter VIII: Results for Orthotropic plates are deduced from those given in Chapter II by a change of constants.\r\n\r\nChapter IX: Typical problems in soil mechanics connected with a loaded column, and with a loaded wall, are worked out in detail. Graph III shows for a particular case the effect aeolotropy may have on the vertical stress distributions in a loaded soil. A brief outline is made of some other problems in an aeolotropic medium capable of solution by the methods of this thesis.\r\n\r\nAppendix F: Practical methods are given for the determination of the required constants. The value of skew samples is shown. The results obtained in this thesis for an aeolotropic medium, apart from the concentrated case given by Mitchell(6), are new. A good test of the accuracy of the work is provided by the known isotropic elastic results obtained by a limiting procedure in Chapter VI. As far as the author is aware, some of the results of Chapter VI are new also. The direct application of Fourier Integral technique to the displacement equations of equilibrium is very rare in elastic problems. This thesis illustrates the power and simplicity of such an approach. Finally, as shown in Chapter IX the results are very readily adapted to practical use.", "doi": "10.7907/CTQV-V186", "publication_date": "1949", "thesis_type": "phd", "thesis_year": "1949" }, { "id": "thesis:381", "collection": "thesis", "collection_id": "381", "cite_using_url": "https://resolver.caltech.edu/CaltechETD:etd-01272009-083535", "primary_object_url": { "basename": "Hardy_dj_1949.pdf", "content": "final", "filesize": 13414773, "license": "other", "mime_type": "application/pdf", "url": "/381/1/Hardy_dj_1949.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "The Effect of Surface Roughness upon 25 ST Aluminum Alloy Subjected to Repeated Tensile Stresses Above the Proportional Limit", "author": [ { "family_name": "Hardy", "given_name": "Donald James", "clpid": "Hardy-Donald-James" } ], "thesis_advisor": [ { "family_name": "Sechler", "given_name": "Ernest Edwin", "clpid": "Sechler-E-E" }, { "family_name": "Clark", "given_name": "Donald S.", "clpid": "Clark-D-S" }, { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "GALCIT" }, { "literal": "div_eng" } ], "abstract": "Fatigue tests were conducted on 54 specimens of 25 ST aluminum alloy for the purpose of determining the effect of surface roughness on the fatigue life of the material when subjected to constant repeated tensile stresses above the proportional limit. In addition, the basic stress vs. cycle curve for 25 ST aluminum alloy was extended to include the range of cycles below 100,000.\r\n\r\nA machine capable of applying repeated pure tension loads at a rate of 52 cycles per minute, without shock but with a high rate of loading, was used to obtain this data.\r\n\r\nIt was found that the rate of build-up and the duration of the impulse created an equivalent static load equal to the peak of the impulse loading.\r\n\r\nFor the material tested, it was found that as the surface roughness increased from 5\u03bc to 200\u03bc, the life expectancy of the alloy in general was reduced. However, the experimental results revealed a larger degree of scatter in the cyclic range below 40,000 cycles as opposed to the relatively consistent data obtained at the higher cycles. Therefore, no general conclusions could be ascertained as to the effect of roughness on the fatigue life of the material in the high stress region.", "doi": "10.7907/Q6A7-1796", "publication_date": "1949", "thesis_type": "engd", "thesis_year": "1949" }, { "id": "thesis:474", "collection": "thesis", "collection_id": "474", "cite_using_url": "https://resolver.caltech.edu/CaltechETD:etd-02022009-093120", "primary_object_url": { "basename": "Ringness_wm_1949.pdf", "content": "final", "filesize": 4155003, "license": "other", "mime_type": "application/pdf", "url": "/474/1/Ringness_wm_1949.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "The Effect of Surface Roughness upon 25 ST Aluminum Alloy Subjected to Repeated Tensile Stresses Above the Proportional Limit", "author": [ { "family_name": "Ringness", "given_name": "William Merritt", "clpid": "Ringness-William-Merritt" } ], "thesis_advisor": [ { "family_name": "Sechler", "given_name": "Ernest Edwin", "clpid": "Sechler-E-E" }, { "family_name": "Clark", "given_name": "Donald S.", "clpid": "Clark-D-S" }, { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "GALCIT" }, { "literal": "div_eng" } ], "abstract": "Utilizing the Repeated Load Hydraulic Testing Machine at the Daniel Guggenheim Aeronautical Laboratory, California Institute of Technology, Pasadena, California, the author, in collaboration with Lt. Comdr. D. J. Hardy, U. S. Navy, investigated the effects of surface roughness upon the cyclic life of 25 ST aluminum alloy when subjected to repeated constant tensile stresses in the region above the proportional limit.\r\n\r\nThe stress impulses are of such low frequency as to allow consideration of single impulses. The rate of build-up of the impulse and the duration of the impulsive load are such as to create an equivalent static load of substantially the same magnitude as the peak of the impulse loading.\r\n\r\nIt was found that surface roughness has some effect upon the cyclic life. In the lower stress regions, the greater the degree of surface roughness, the shorter the life appears to be. However, for the range of roughness investigated, 5\u03bc to 200\u03bc, the effect is not so pronounced as is usually found below the proportional limit.\r\n\r\nWhere the applied stresses reached far up into the plastic range the effect of surface roughness does not seem to follow quite as specific a pattern. Since the loading impulse featured a 0.33 second duration of maximum load, the effects of creep may well have taken over in shaping the life cycle curve with little regard for surface roughness.", "doi": "10.7907/WH57-T868", "publication_date": "1949", "thesis_type": "engd", "thesis_year": "1949" }, { "id": "thesis:3944", "collection": "thesis", "collection_id": "3944", "cite_using_url": "https://resolver.caltech.edu/CaltechETD:etd-10062005-131350", "primary_object_url": { "basename": "Swatta_fa_1947.pdf", "content": "final", "filesize": 9918082, "license": "other", "mime_type": "application/pdf", "url": "/3944/1/Swatta_fa_1947.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "A Study of the Effect of Vertical Sand Drains as a Means for the Rapid Consolidation of Soils of Low Permeability", "author": [ { "family_name": "Swatta", "given_name": "Frank Albert", "clpid": "Swatta-Frank-Albert" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "The phenomenon of consolidation or the settlement of soils under load is well known to civil engineering practice in all works dealing with earth movement and foundations. Unlike true elastic materials, this deformation takes place at a variable rate over an extended period of time and is especially apparent in clays saturated with water. This phenomenon was first explained by K. Terzaghi who assumed the soil mass to be an elastic porous medium with voids filled with water or the concept of a saturated rubber sponge. The deformation of such a mass upon application of a load would then be variable, depending upon the rate at which water was forced from the voids. The application of mathematical analysis to this concept led to the complete solution by Terzaghi for the one dimensional process to be followed by the studies of M. A. Biot, L. Rendulic and N. Carillo dealing with the three dimensional case.", "doi": "10.7907/FB0G-N523", "publication_date": "1947", "thesis_type": "masters", "thesis_year": "1947" }, { "id": "thesis:17201", "collection": "thesis", "collection_id": "17201", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:05052025-182845559", "primary_object_url": { "basename": "Janes_RL_1944.pdf", "content": "final", "filesize": 16341099, "license": "other", "mime_type": "application/pdf", "url": "/17201/1/Janes_RL_1944.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "An Investigation of the Transverse Strength of Anchor Bolts in Concrete", "author": [ { "family_name": "Janes", "given_name": "Robert Lee", "clpid": "Janes-Robert-Lee" }, { "family_name": "Johnson", "given_name": "Carl Burdett", "clpid": "Johnson-Carl-Burdett" } ], "thesis_advisor": [ { "family_name": "Martel", "given_name": "Romeo Raoul", "clpid": "Martel-R-R" }, { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "No abstract.", "doi": "10.7907/315y-f858", "publication_date": "1944", "thesis_type": "masters", "thesis_year": "1944" }, { "id": "thesis:17101", "collection": "thesis", "collection_id": "17101", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:03282025-184928531", "primary_object_url": { "basename": "Minasian_JK_1944.pdf", "content": "final", "filesize": 35350693, "license": "other", "mime_type": "application/pdf", "url": "/17101/1/Minasian_JK_1944.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "Comparative Results of Co-Operating Laboratories on the Shearing Resistance of Ottawa Sand", "author": [ { "family_name": "Minasian", "given_name": "John Kachig", "clpid": "Minasian-John-Kachig" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "No abstract.", "doi": "10.7907/yg5j-1643", "publication_date": "1944", "thesis_type": "masters", "thesis_year": "1944" }, { "id": "thesis:17116", "collection": "thesis", "collection_id": "17116", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:03312025-202919862", "primary_object_url": { "basename": "Curtis_TG_1944.pdf", "content": "final", "filesize": 27929182, "license": "other", "mime_type": "application/pdf", "url": "/17116/1/Curtis_TG_1944.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "A Model Study of Horizontal Pressures on a Retaining Wall Due to Concentrated Surface Loads and Electrical Strain Gauge Pressure Measurement", "author": [ { "family_name": "Curtis", "given_name": "Thomas Grey", "clpid": "Curtis-Thomas-Grey" }, { "family_name": "French", "given_name": "John Martin", "clpid": "French-John-Martin" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" }, { "family_name": "Hudson", "given_name": "Donald E.", "clpid": "Hudson-D-E" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "No abstract.", "doi": "10.7907/f77f-tj19", "publication_date": "1944", "thesis_type": "masters", "thesis_year": "1944" }, { "id": "thesis:17055", "collection": "thesis", "collection_id": "17055", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:03122025-161226644", "primary_object_url": { "basename": "Vey_E_1943.pdf", "content": "final", "filesize": 9464529, "license": "other", "mime_type": "application/pdf", "url": "/17055/1/Vey_E_1943.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "Stresses in Decompression Chamber Model of Cooperative Wind Tunnel", "author": [ { "family_name": "Vey", "given_name": "Ebenezer", "clpid": "Vey-Ebenezer" } ], "thesis_advisor": [ { "family_name": "Martel", "given_name": "Hardy Cross", "clpid": "Martel-H-C" }, { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "No abstract.", "doi": "10.7907/6sta-1924", "publication_date": "1943", "thesis_type": "engd", "thesis_year": "1943" }, { "id": "thesis:17155", "collection": "thesis", "collection_id": "17155", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:04152025-203756236", "primary_object_url": { "basename": "Folkins_RW_1939.pdf", "content": "final", "filesize": 17920547, "license": "other", "mime_type": "application/pdf", "url": "/17155/1/Folkins_RW_1939.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "Experimental Research on the Problem of Determining the Maximum Moisture Content of Soils Under Footings by Means of Laboratory Vacuum Tests", "author": [ { "family_name": "Folkins", "given_name": "Richard Wilson", "clpid": "Folkins-Richard-Wilson" }, { "family_name": "Sidler", "given_name": "Arthur William", "clpid": "Sidler-Arthur-William" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "No abstract.", "doi": "10.7907/56mm-bp36", "publication_date": "1939", "thesis_type": "masters", "thesis_year": "1939" }, { "id": "thesis:16875", "collection": "thesis", "collection_id": "16875", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:11252024-185950309", "primary_object_url": { "basename": "Morse_CA_1938.pdf", "content": "final", "filesize": 12602166, "license": "other", "mime_type": "application/pdf", "url": "/16875/1/Morse_CA_1938.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "Concrete Mix Design : A Summary", "author": [ { "family_name": "Morse", "given_name": "Charles Adelbert", "clpid": "Morse-Charles-Adelbert" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "No abstract.", "doi": "10.7907/ab53-yv81", "publication_date": "1938", "thesis_type": "masters", "thesis_year": "1938" }, { "id": "thesis:17093", "collection": "thesis", "collection_id": "17093", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:03252025-201053142", "type": "thesis", "title": "Test Procedure for the Determination of Maximum Moisture Content to be Expected under Footings Located in Permeable Soil Above Water Table.", "author": [ { "family_name": "Alwart", "given_name": "Harold John", "clpid": "Alwart-Harold-John" }, { "family_name": "Servet", "given_name": "Abdurrahim", "clpid": "Servet-Abdurrahim" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "The problem of determining the bearing value of a soil has long caused considerable trouble among foundation engineers. One of the main features of this problem is the determination of the probable minimum bearing value of a California soil when tested during the summer or dry season. It is a known fact that the bearing value of the soil will vary with the moisture content. It is also quite generally known that the present tests of bearing value do not give true results. By true results are meant, results which accurately check field determinations. There are certain cases in which the saturated tests now in use give value far too low as well as inconsistent values. By means of the tests outlined, the authors believe that more accurate and reliable results may be obtained in the future.
\r\n\r\nThese tests are mainly concerned with the bearing values of soils under shallow footings. Deep footing, cassions and piles are eliminated from the tests. The reason for this being that the authors believe that the more specialized cases should be more thoroughly investigated. However, in the case of the shallow footings, as used for school buildings and homes, a limited amount of investigation and time for testing is required. With this point in mind, work has been concentrated on this point.
\r\n\r\nAs a preliminary step along this line, moisture contents were taken at a number of places before the rainy season began. This was done so that the increase in moisture of a number of definite soils could be obtained and checked in the laboratory. Samples were taken at various depths and places, concentration being in the poorer soils of the district. Later after an unusually heavy rainy season, which it was fortunate to encounter, the sampled places were revisited and the moisture content of the soil again obtained. With this data it was assumed that laboratory checks for these values would hold for any similar soil.
\r\n\r\nThe laboratory work was divided into two main categories. First being the determination of the type of soil in use and its various properties, and the second, the technique and type of test suited for this subject. This first part\r\nconsisted of the standard tests which are hydrometer and sieve analysis, liquid and plastic limits, shear, compression, shrinkage and sp-gravity. The second part was split up into three divisions, per collation, rainfall and\r\ncapillary rise tests. All results were reduced to a common base, but due to the large number of variables, such as compaction, types of soil, density, etc. and the limited time, this could not be carried to the completion desired by the authors.
", "doi": "10.7907/k6ad-2w08", "publication_date": "1937", "thesis_type": "masters", "thesis_year": "1937" }, { "id": "thesis:16905", "collection": "thesis", "collection_id": "16905", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:12072024-122445532", "primary_object_url": { "basename": "Howard_ER_1935.pdf", "content": "final", "filesize": 110582108, "license": "other", "mime_type": "application/pdf", "url": "/16905/1/Howard_ER_1935.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "Residual Stresses in Bimetallic Strips", "author": [ { "family_name": "Howard", "given_name": "Ernest Russell", "clpid": "Howard-Ernest-Russell" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "It is concluded (1) that under the assumption mentioned on\r\npage 56 the residual initial stress at room temperature in the\r\nouter fiber of the invar side of the bimetallic strip ranges from\r\n35,000 lb. per sq. in. tension to zero stress depending on the\r\nrolling hardness of the strip. The residual stress distribution\r\nover the entire cross section, was not determined. (2) With subjection\r\nof the bimetallic strip to a temperature of 600\u00b0 F. for\r\n504 hours the residual stress in the invar outer fiber is in general\r\nreduced. (3) When the bimetallic strip is considered as a\r\nhomogeneous material, the proportional elastic limit in bending\r\nranges from 39,000 to 126,000 pounds per square inch in the outer\r\nfiber if the strip is bent so as to put the steel side in tension,\r\nand ranges from 28,000 to 70,000 pounds _per square inch in the\r\nouter fiber if the strip is bent so as to put the invar in tension.\r\nThe proportional elastic limit varies with the rolling hardness of\r\nthe strip.", "doi": "10.7907/4n8a-nr57", "publication_date": "1935", "thesis_type": "masters", "thesis_year": "1935" }, { "id": "thesis:16764", "collection": "thesis", "collection_id": "16764", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:09272024-182827005", "primary_object_url": { "basename": "Johnson_SY_1934.pdf", "content": "final", "filesize": 21607029, "license": "other", "mime_type": "application/pdf", "url": "/16764/1/Johnson_SY_1934.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "Experimental Determination of Pressure Distribution Under a Combined Footing", "author": [ { "family_name": "Johnson", "given_name": "Samuel Yorks", "clpid": "Johnson-Samuel-Yorks" }, { "family_name": "Scott", "given_name": "Homer Judkins", "clpid": "Scott-Homer-Judkins" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "No abstract.", "doi": "10.7907/37jm-wc42", "publication_date": "1934", "thesis_type": "masters", "thesis_year": "1934" }, { "id": "thesis:16742", "collection": "thesis", "collection_id": "16742", "cite_using_url": "https://resolver.caltech.edu/CaltechTHESIS:09182024-183742361", "primary_object_url": { "basename": "Leeper_L_1932.pdf", "content": "updated", "filesize": 11794418, "license": "other", "mime_type": "application/pdf", "url": "/16742/1/Leeper_L_1932.pdf", "version": "v2.0.0" }, "type": "thesis", "title": "The Effect of a Varying Moisture Content on the Settlement of Soil Subjected to a Constant Load", "author": [ { "family_name": "Leeper", "given_name": "Laverne Davidson", "clpid": "Leeper-Laverne-Davidson" } ], "thesis_advisor": [ { "family_name": "Converse", "given_name": "Frederick James", "clpid": "Converse-F-J" } ], "thesis_committee": [ { "family_name": "Unknown", "given_name": "Unknown" } ], "local_group": [ { "literal": "div_eng" } ], "abstract": "No abstract.", "doi": "10.7907/dn6n-z437", "publication_date": "1932", "thesis_type": "masters", "thesis_year": "1932" } ]