Duff A. Abrams (1880, Illinois, – 1965, New York) was an American researcher in the field of composition and properties of concrete. He developed the basic methods for testing concrete characteristics still in use today. A professor with the Lewis Institute, he studied the component materials of concrete in the early 20th century. D. A. Abrams was researcher, professor, and director of the research laboratory of the Portland Cement Association in Chicago. He investigated the influence of the composition of concrete mixes on the strength of the end product.
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| - Duff Abrams (en)
- Duff Abrams (fr)
- Duff Abrams (nl)
- Duff Abrams (pt)
- Duff Abrams (sv)
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| - Duff A. Abrams (1880, Illinois, – 1965, New York) est un rhéologue américain enseignant à l'Institut Lewis au début du XXe siècle. On lui doit les premières tentatives de caractérisation quantitative du béton, dont plusieurs demeurent aujourd'hui (à quelques perfectionnements de détail près). Il a dirigé le laboratoire de recherche de la Portland Cement Association à Chicago. (fr)
- Duff A. Abrams (1880, Illinois, – 1965, New York) was an American researcher in the field of composition and properties of concrete. He developed the basic methods for testing concrete characteristics still in use today. A professor with the Lewis Institute, he studied the component materials of concrete in the early 20th century. D. A. Abrams was researcher, professor, and director of the research laboratory of the Portland Cement Association in Chicago. He investigated the influence of the composition of concrete mixes on the strength of the end product. (en)
- Duff A. Abrams (Illinois, 1880 — New York, 1965) was een Amerikaans onderzoeker op het gebied van de samenstelling en eigenschappen van beton. D.A. Abrams was onderzoeker, hoogleraar, en directeur van het Portland Cement Association researchlaboratorium te Chicago. Hij deed baanbrekend onderzoek naar de invloed van de samenstelling van betonspecie op de sterkte van het eindproduct. De belangrijkste resultaten van zijn onderzoek waren: Duff Abrams was president van de American Concrete Association (ACI) van 1930 tot 1931. (nl)
- Duff A. Abrams, född 1880 i Illinois, död 1965 i New York, var en amerikansk forskare inom sammansättning och egenskaper hos betong. Han utvecklade grundläggande testmetoder för betong som används fortfarande idag. Som professor vid studerade han de ingående grundmaterialen i betong under tidigt 1900-tal. D. A. Abrams var forskare, professor, och chef för vid i Chicago. Han undersökte hur olika betongblandningar inverkade på slutproduktens hållfasthet. Några av resultaten från hans forskning är: Han var också ordförande i (ACI) från 1930 till 1931. (sv)
- Duff Andrew Abrams (Illinois, 1880 – Nova Iorque, 1965) foi um engenheiro civil estadunidense, pesquisador da área de composição e propriedades do concreto. Desenvolveu os métodos básicos para os testes característicos do concreto ainda em uso na atualidade. Professor do Instituto Lewis, uma das instituições que originaram o Instituto de Tecnologia de Illinois, estudou os materiais constituintes do concreto na início do século XX. Alguns dos resultados de suas pesquisas foram: Recebeu a Medalha Frank P. Brown de 1942. (pt)
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| - Duff A. Abrams (1880, Illinois, – 1965, New York) was an American researcher in the field of composition and properties of concrete. He developed the basic methods for testing concrete characteristics still in use today. A professor with the Lewis Institute, he studied the component materials of concrete in the early 20th century. D. A. Abrams was researcher, professor, and director of the research laboratory of the Portland Cement Association in Chicago. He investigated the influence of the composition of concrete mixes on the strength of the end product. Some of the results of his research was:
* the definition of the concept of fineness modulus;
* the definition of the water-cement ratio;
* a test method for the workability of a concrete mix by using what is called 'Abrams cone', see concrete slump test. In a comprehensive research program, Abrams established the relationship between the water-cement ratio and the compressive strength of concrete. The results were first published in 1918 in D. A. Abrams, Design of Concrete Mixtures, Bulletin 1, Structural Materials Research Laboratory, Lewis Institute, Chicago, 1918. He was also president of the (ACI) from 1930 until 1931. He was elected in 1915 a fellow of the American Association for the Advancement of Science. He was awarded the Frank P. Brown Medal in 1942. (en)
- Duff A. Abrams (1880, Illinois, – 1965, New York) est un rhéologue américain enseignant à l'Institut Lewis au début du XXe siècle. On lui doit les premières tentatives de caractérisation quantitative du béton, dont plusieurs demeurent aujourd'hui (à quelques perfectionnements de détail près). Il a dirigé le laboratoire de recherche de la Portland Cement Association à Chicago. (fr)
- Duff A. Abrams (Illinois, 1880 — New York, 1965) was een Amerikaans onderzoeker op het gebied van de samenstelling en eigenschappen van beton. D.A. Abrams was onderzoeker, hoogleraar, en directeur van het Portland Cement Association researchlaboratorium te Chicago. Hij deed baanbrekend onderzoek naar de invloed van de samenstelling van betonspecie op de sterkte van het eindproduct. De belangrijkste resultaten van zijn onderzoek waren:
* het definiëren van de ;
* het definiëren van de water/cementfactor;
* de beproevingsmethode van de plasticiteit van betonspecie met behulp van de naar hem genoemde Kegel van Abrams. De relatie tussen de water/cementfactor en de betondruksterkte werd door Abrams vastgesteld door uitgebreid experimenteel onderzoek en voor het eerst beschreven in 1918. Duff Abrams was president van de American Concrete Association (ACI) van 1930 tot 1931. (nl)
- Duff Andrew Abrams (Illinois, 1880 – Nova Iorque, 1965) foi um engenheiro civil estadunidense, pesquisador da área de composição e propriedades do concreto. Desenvolveu os métodos básicos para os testes característicos do concreto ainda em uso na atualidade. Professor do Instituto Lewis, uma das instituições que originaram o Instituto de Tecnologia de Illinois, estudou os materiais constituintes do concreto na início do século XX. Foi pesquisador, professor e diretor do laboratório de pesquisas da em Chicago. Investigou a influência da composição de misturas de concreto sobre a resistência do produto final. Alguns dos resultados de suas pesquisas foram:
* definição do conceito de ;
* definição da ;
* um método de testes para a trabalhabilidade de uma mistura de concreto usando o denominado 'cone de Abrams' (concrete slump test). Em um programa de pesquisa compreensivo, Abrams estabeleceu a relação entre a razão água-cimento e a resistência à compressão do concreto. Os resultados foram publicados a primeira vez em 1918 em D. A. Abrams, Design of Concrete Mixtures, Bulletin 1, Structural Materials Research Laboratory, Lewis Institute, Chicago, 1918. Recebeu a Medalha Frank P. Brown de 1942. (pt)
- Duff A. Abrams, född 1880 i Illinois, död 1965 i New York, var en amerikansk forskare inom sammansättning och egenskaper hos betong. Han utvecklade grundläggande testmetoder för betong som används fortfarande idag. Som professor vid studerade han de ingående grundmaterialen i betong under tidigt 1900-tal. D. A. Abrams var forskare, professor, och chef för vid i Chicago. Han undersökte hur olika betongblandningar inverkade på slutproduktens hållfasthet. Några av resultaten från hans forskning är:
* definition av begreppet ;
* definition av vattencementtal;
* en testmetod för betongblandningens (gjutbarhet) genom användning av . I ett omfattande forskningsprogram bestämde Abrams förhållandet mellan vattencementtalet och . Resultaten publicerades första gången 1918. Han var också ordförande i (ACI) från 1930 till 1931. (sv)
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