Abstract: In the present study, La2Zr2O7 was used as a coat for stainless steel alloy. Lanthanum zirconate coat was sprayed using plasma spray technique. The preparation and characterization of La2Zr2O7 coat was studied. Hot corrosion of the coat surface was conducted in (1:1) V2O5 / Na2SO4 molten mixture at 900oC for 50 and 100 h. The results showed that molten mixture of V2O5 / Na2SO4 attacks La2Zr2O7 coat heavily after 100 h. Depending on the nature of molten salt, La2Zr2O7 can considered either a strong basic oxide or strong acidic oxide.

• Publication Date: 18-Mar-2016
• DOI: 10.15224/978-1-63248-093-4-18
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Abstract: This study presents an attempt of experimental study on the effect of adding asphalt emulsion and Portland cement on the engineering properties of sand poorly graded river soil used as subgrade soil in pavement construction. The soil brought from sides of Al-Kufa River in Najaf state middle west of Iraq. Asphalt emulsion used in this study is that manufactured for surfacing and cold paving proposes. While Portland cement is that used in construction building. Percent of adding are (0, 3, 6, 9, 12 and 15) % by weight. Properties of soil studied and presented in this paper are compaction, optimum water content, CBR, and direct shear. Results showed that the adding of asphalt emulsion and cement increase the dry density in different rate. While the optimum water content decrease with increasing asphalt emulsion and increase with increasing cement added. Direct shear of soil stabilized with cement is higher than both natural soil and that stabilized with asphalt emulsion. CBR values showed

• Publication Date: 18-Mar-2016
• DOI: 10.15224/978-1-63248-093-4-19
• Views: 0
• Downloads: 0