دانلود رایگان مقاله لاتین اثر منبع So3 سیمان از سایت الزویر
عنوان فارسی مقاله:
اثر منبع SO3 سیمان در انبساط ملات
عنوان انگلیسی مقاله:
The effect of the source of cement SO3 on the expansion of mortars
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Internal sulfate attack is pathology of concrete. Over 40 years of researches, the scientists proved that the delayed ettringite formation (DEF) can lead to significant deterioration of concrete structure. However, the mechanisms of the DEF have still not been totally elucidated. When ettringite occurs homogeneously and immediately in a fresh concrete, it does not cause any expansion but lately when it forms heterogeneously in a hard concrete, it can produce cracks. The heat treatment is one of the essential factors for the formation of delayed ettringite (Detwiler and Taylor, 2005). The maximum curing temperature should be kept at less than 70 C in order to minimize the risk of DEF (Detwiler and Taylor, 2005). The leaching of the alkali accelerates the formation of DEF. In order to minimize this risk, it is necessary to control the parameters that might affect the leaching of alkali compound during the curing period (Aubert et al., 2013). Regarding cement composition, the important parameters, influencing the formation of DEF, appear to be the SO3/Al2O3 ratio (Day, 1992), SO3, Na2O, Na2Oeq, MgO, CaO, C3A content, specific surface area and possibly C3S content (Shimada et al., 2005).
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کلمات کلیدی:
Influence of the Clinker SO3 on the Cement Characteristics https://www.researchgate.net/.../235987201_Influence_of_the_Clinker_SO3_on_the_Ce... The results show that increasing the amount of clinker SO3 at low alkali level reduces the ... The effect of the source of cement SO3 on the expansion of mortars. [PDF]effect of sulfur trioxide content on concrete - FDOT www.fdot.gov/research/Completed_Proj/Summary_SMO/FDOT_BC353_31.pdf The sources of sulfur trioxide (SO3) in cements are various; however, the major source is typically calcium sulfate(s). ... Sulfur trioxide content in clinker or cement can be of variable reactivity. [PDF]Influence of the SOâ•• content of cement on the ... - Scholar Commons scholarcommons.usf.edu/cgi/viewcontent.cgi?article=2065&context=etd by AA Hanhan - 2004 - Cited by 3 - Related articles Nov 5, 2004 - Compressive Strength verses SO3 Content for C Cement .... This added amount of gypsum, together with other sulfate sources determines the ... effect of sulfur trioxide content on concrete structures ... - TRID Database https://trid.trb.org/view.aspx?id=755078 by AM Zayed - 2004 - Cited by 3 - Related articles Apr 27, 2005 - In this study, several ASTM portland cements were used to address effects of increasing sulfur trioxide (SO3) content of cement on the ... Significance of Tests and Properties of Concrete and Concrete-making ... https://books.google.com/books?isbn=0803133677 Joseph F. Lamond, J. H. Pielert - 2006 - Technology & Engineering The primary source of LOI in modern cements is from water combined in calcium ... SO3 All types of portland cement have a limit on the percentage of allowable ... [PDF]Effect of SO3 Content of Cement on Durability of Concrete www.cement.org/...source/.../sn0285-effect-of-so3-content-of-cement-on-durability-o... specbens prg-red from the cements 'of low free CaD content, Ref. No. 2 .... prepared from cements with 3.5% SO3 reach w expansion of 0.1% or more within. Searches related to source of cement SO3 optimum so3 in cement effect of loss on ignition in cement effect of mgo in clinker what is c3a in cement insoluble residue in cement ettringite formation hydration of cement soundness of cement
