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Summary of Concrete Workability Test Methods University of Texas RESEARCH REPORT ICAR –105-1 Sponsored by the Aggregates Foundation for Technology, Research and Education Eric P. Koehler University of Texas at Austin Austin, TX David W. Fowler University of Texas at Austin Austin, TX فایل پی دی اف در 93 صفحه منبع @Civilbest ICAR 105-1.pdf

روش های آزمایشگاهی در بتن پیشرفته فایل ارایه پروژه درس آزمایشگاه تکنولوژی بتن پیشرفته با موضوع workability ، ارایه شده توسط اشکان جعفری نور زیر نظر دکتر علی دلنواز عضو هیات علمی دانشگاه آزاد واحد قزوین فایل به صورت پی دی اف در 51 اسلاید میباشد. منبع دانلود از این لینک یا پیوست 26-10-1396-22-55-02.rar

Effects of a Locally Sourced Water Reducing/Retarding Admixture on Concrete Original Article, B30 Oladiran A, Aderinlewo, Tanimola M. Journal. Civil Eng. Urban. 2(5): 170-175. 2012. ABSTRACT:The results of experiments to determine the effects of a water reducing/retarding admixture locally sourced from orange tree leaves on concrete are presented in this paper. The admixture was added to the concrete mix in percentages of 1, 2, 5, 10 and 15 by weight of cement. The results showed that the workability of the mix improved while the water cement ratio reduced gradually as the admixture content was increased from 1% to 15%. Cube crushing tests performed showed that the 28th day compressive strengths of the concrete increased considerably as the admixture content increased from 1% to2% up to 5% beyond that of the control. Thereafter, the compressive strengths dropped at 10% and 15% admixture contents. The percentage increase in compressive strengths of the concrete with 1%, 2% and 5% admixture contents were 6.58%, 14.07% and 23.53% respectively above that of the control. Keywords:water reducing, retarding, admixture, workability, crushing tests, compressive strengths. منبع: [Hidden Content] دانلود: [Hidden Content],B%2030%20Effects%20of%20a%20Locally%20Sourced%20Water%20Reducing-Retarding%20Admixture%20on%20Concrete.pdf JCEU ,B 30 Effects of a Locally Sourced Water Reducing-Retarding Admixture on Concrete.pdf