Hydraulic Cement: Its Properties, Testing, and UseJ. Wiley & sons, 1906 - 300 sayfa |
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29 sonuçtan 1-5 arası sonuçlar
Sayfa 132
... specimens have an important effect upon the result , it is necessary to adopt standard dimensions in order to obtain uniform results . For compressive tests a parallelopiped , usually a cube , is employed . In the United States a cube ...
... specimens have an important effect upon the result , it is necessary to adopt standard dimensions in order to obtain uniform results . For compressive tests a parallelopiped , usually a cube , is employed . In the United States a cube ...
Sayfa 133
... specimen is a cube with edges seven centimeters in length . The French " Commission upon Methods of Testing Materials , " however , rejected the rectangular section for compression specimens on the ground that it is difficult to so fill ...
... specimen is a cube with edges seven centimeters in length . The French " Commission upon Methods of Testing Materials , " however , rejected the rectangular section for compression specimens on the ground that it is difficult to so fill ...
Sayfa 135
... specimen than with larger sections , so that more briquettes may be prepared from each mixing . The size of the ... specimens . The Committee of the American Society of Civil Engineers in 1904 recommended the continued use of the old ...
... specimen than with larger sections , so that more briquettes may be prepared from each mixing . The size of the ... specimens . The Committee of the American Society of Civil Engineers in 1904 recommended the continued use of the old ...
Sayfa 136
... specimens be made and tested according to standard methods , and that the sand used be of standard quality . In the German specifications the standard sand is described as follows : " In order to obtain concordant results in the tests ...
... specimens be made and tested according to standard methods , and that the sand used be of standard quality . In the German specifications the standard sand is described as follows : " In order to obtain concordant results in the tests ...
Sayfa 147
... specimens . The machine used for this purpose is either the Bohmé hammer or the Tetmajer apparatus . The Bohmé hammer , designed by Dr. Bohmé of the Charlottenburg Experiment Station , is shown in Fig . II . It consists of an ...
... specimens . The machine used for this purpose is either the Bohmé hammer or the Tetmajer apparatus . The Bohmé hammer , designed by Dr. Bohmé of the Charlottenburg Experiment Station , is shown in Fig . II . It consists of an ...
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Sık kullanılan terimler ve kelime öbekleri
28 days action aluminate of lime American Society apparatus briquettes burning calcium sulphate Candlot carbonate carbonic acid celit cement mortar cent centimeters Chatelier Chemical Civil Engineers clinker commonly concrete consistency contain cracks determined diameter disintegration effect Elements employed expansion Fahr free lime gauging give grains grammes grappiers hardening heat hydrated hydraulic index hydraulic lime immersed inert iron kiln laboratory Le Chatelier less machine magnesia Manual Mechanics Methods of Testing millimeters mixed mixture morocco mould natural cements neat cement needle obtained oxide pats placed Portland cement powder practice Prof proportion quantity of water quick-setting quicklime rate of setting recommended Roman cements sand mortar sea-water sieve silica silica and alumina slag cement slaked lime slaking slow-setting Society of Civil specific gravity specimen standard sand Strength of Materials sulphate sulphuric acid swelling temperature tensile strength Testing Materials tion Treatise tricalcic unsoundness usually varies volume weight
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Sayfa 162 - Care should be observed in centering the briquettes in the testing machine, as cross-strains, produced by improper centering, tend to lower the breaking strength. The load should not be applied too suddenly, as it may produce vibration, the shock from which often breaks the briquette before the ultimate strength is reached.
Sayfa 265 - F. as practicable, and observed at intervals for at least 28 days. (c) A third pat is exposed in any convenient way in an atmosphere of steam, above boiling water, in a loosely closed vessel for five hours. (24) These pats, to satisfactorily pass the requirements, shall remain firm and hard and show no signs of distortion, checking, cracking or disintegrating.
Sayfa 265 - Pats of neat cement about three inches in diameter, one-half inch thick at the center, and tapering to a thin edge, shall be kept in moist air for a period of twenty-four hours.
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Sayfa 264 - It shall develop initial set in not less than thirty minutes, but must develop hard set in not less than one hour, nor more than ten hours. TENSILE STRENGTH 22. The minimum requirements for tensile strength for briquettes one inch square in section shall be within the following limits, and shall show no retrogression in strength within the periods specified: ' Age Neat Cement Strength 24 hours in moist air 150 — 200 Ibs.