Papers by Salim Ahmadnezhad
Powder Technology, 2014
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/authorsrights Granulated air-cooled silicomanganese slag from ferro-alloy manufacturing plants is mainly disposed as a landfill waste. On the other hand, it is highly advisable and beneficial to partially replace Portland cement with suitable industrial wastes. The present work investigates the viability of using air-cooled silicomanganese slag as a supplementary cementing material. The silicomanganese slag possesses an acid composition with SiO 2 , CaO, and Al 2 O 3 , as main oxides and a MnO-content of nearly 10% by weight. The lime combinability test by thermo-gravimetry and the results obtained by FT-IR confirm weak to moderate pozzolanic properties compared to silica fume and natural pozzolans. Experimental results prove the effectiveness of mechanical activation for replacement levels up to 35% with no significant variation in setting times. The blended cements fulfill all the chemical requirements of the standard specification and do not exhibit any volume instability. The compressive strength reduction for replacement levels up to 15% and for 3, 7 and 28 days of curing is limited to only about 10%.
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/authorsrights Granulated air-cooled silicomanganese slag from ferro-alloy manufacturing plants is mainly disposed as a landfill waste. On the other hand, it is highly advisable and beneficial to partially replace Portland cement with suitable industrial wastes. The present work investigates the viability of using air-cooled silicomanganese slag as a supplementary cementing material. The silicomanganese slag possesses an acid composition with SiO 2 , CaO, and Al 2 O 3 , as main oxides and a MnO-content of nearly 10% by weight. The lime combinability test by thermo-gravimetry and the results obtained by FT-IR confirm weak to moderate pozzolanic properties compared to silica fume and natural pozzolans. Experimental results prove the effectiveness of mechanical activation for replacement levels up to 35% with no significant variation in setting times. The blended cements fulfill all the chemical requirements of the standard specification and do not exhibit any volume instability. The compressive strength reduction for replacement levels up to 15% and for 3, 7 and 28 days of curing is limited to only about 10%.
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Papers by Salim Ahmadnezhad