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      Pdf 32 Concrete Admixtures - Paper Presentation for Civil Engineers

      Abstract: Admixtures are ingredients other than water, aggregates, hydraulic cement, and fibers that are added to the concrete batch immediately before or during mixing, in nominal
      quantities. A proper use of admixtures offers certain beneficial effects to concrete, including improved quality, acceleration or retardation of setting time, enhanced frost and
      sulphate resistance, control of strength development, improved workability, and enhanced
      finishability.

      Admixtures vary widely in chemical composition, and many perform more than one function. Two basic types of admixtures are available: chemical and mineral. All admixtures to be used in concrete construction should meet specifications; tests should be made to evaluate how the admixture will affect the properties of the concrete to be made with the specified job materials, under the anticipated ambient conditions, and by the anticipated construction procedures.


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      Materials used as admixtures included milk and lard by the Romans; eggs during the middle ages in Europe; polished glutinous rice paste, lacquer, tung oil, blackstrap molasses, and extracts from elm soaked in water and boiled bananas by the Chinese; and in Mesoamerica and Peru, cactus juice and latex from rubber plants. The Mayans also used bark extracts and other substances as set retarders to keep stucco workable for a long period of time.

      Please find the complete paper attached!

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    2. The Following 8 Users LIKE this post from saloni:

      A Mallikarjun (12th October 2012), chriph89 (20th August 2012), DEV DEV (12th August 2011), Devashisj Singh Tiwari (1st February 2013), EngrAyazAhmad (17th September 2014), jalusmruti (19th November 2012), knyts (29th December 2011), Krishnendu Paul (6th November 2012)

    3. #2
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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      HI,....
      Many Many ...thaaanks...friend..
      ............. DEV DEV........

    4. The Following User LIKES this post from DEV DEV:

      vaibhav. kumar91 (15th January 2013)

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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      need help T_T is it possible to create a substitute admixture to concrete using breadfruit sap??? this will be a great help for my thesis

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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      thanx

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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      can u add some international jounral papar related to structural engineering.

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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      its a very usefull website..

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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      Nice work. Keep it up.

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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      Thanks a lot dear Friend....

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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      Osm work guys.................

    12. #10
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      Re: Concrete Admixtures - Paper Presentation for Civil Engineers

      thanks a lot brother


     

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