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RE intermetallic indicates Al-Cu phase interrupted the quality of Al-Si-Cu casting alloy.
Table 1: Chemical Composition of Al-S-Cu Alloy.
From EDS result, the Ce and La rich intermetallic phases are likely to be quaternary Al-Si-Cu-Ce Fig.3(a) and Al-Si-Cu-La Fig.3(b).
Kaufman, E.L.
Al-Ahmari, F.

El-Sebaii et al [2] studied the performance of a single slope still with Phase Change Materials (PCM) as a storage medium and the daily efficiency of 84.3 % was achieved by the PCM incorporated solar still.
Sakthivel et al [3] studied the regenerative solar still with jute cloth as an energy storing material.
Abdallah et al [4] used a suntracking device for rotating the solar still with the movement of the sun.
El-Sebaii, Al-Ghamdi, F.
S Al-Hazmi, S.

According to Pekarovic et al [3], silica is highly alkali soluble in nature.
According to Zhang et al [5] the phases of weight loss in samples occur due to the removal of specific components in the sample such as water, carbonates, aluminates, silica, oxides, organic carbon and other component.
Alam El-Deen, W.A, El-Helece, Characterization and evaluation of thermodynamic parameters for Egyptian heap fired rice straw ash (RSA), Int.

[2] Russell D K, at el.
[3] Singh, B., et al.
[6] LI Fagen, MENG Fanyin, GUO Lin, at el.
[7] Xu Aihua, YUAN Zhengang, YANG Guang, at el.
[8] CHANG Zeliang, JIN Wei, CHEN Bo, at el.

The estimated values of ΔE are in consistent with the report of El-Deen et al. [16].
El-Rabaie, A.A.
El-Adawy, A.A.
El-Rabaie, A.S.
Al Salhi, M.M.

The values of lattice spacing, d, obtained were matched with phases based on Al, Mg, Al-Mg, Mg-O and Al-O systems.
Smooth bar tensile properties of the extruded Al-Mg and Al-Mg/Al2O3 samples were determined in accordance with ASTM test method E8M-96.
Table 1 Density, porosity and tensile properties of Al-Mg and Al-Mg/Al2O3 samples.
Material Mg [wt. %] Al2O3 [wt. %] Density [g/cm 3] Porosity [vol. %] E [GPa] 0.2% YS [MPa] UTS [MPa] Failure Strain [%EL] Al-3.8Mg 3.79 - 2.641 ± 0.005 0.056 70 219 ± 8 320 ± 9 11.8 ± 0.8 Al-1.6Mg/Al2O3 1.56 1.00 2.696 ± 0.011 0.075 71 231 ± 6 264 ± 6 8.7 ± 0.5 Al-2.9Mg/Al2O3 2.94 1.21 2.669 ± 0.009 0.039 73 272 ± 4 350 ± 26 6.1 ± 1.1 Al-3.4Mg/Al2O3 3.42 1.40 2.662 ± 0.009 0.114 75 302 ± 3 363 ± 25 6.6 ± 0.6 Results of the density measurements are shown in Table 1.
(a) FESEM micrograph of Al-3.4Mg/Al2O3 showing distribution of reinforcement, (b) SEM micrograph of Al-3.4Mg/Al2O3 showing grain morphology, (c) SEM micrograph of Al-3.4Mg/Al2O3 showing distribution of secondary phase.

Kousksou et al., « Renewable energy potential and national policy directions for sustainable development in Morocco », Renew.
Alotaibi et al., « Characterization of natural fiber obtained from different parts of date palm tree (Phoenix dactylifera L.) », Int.
Bahloul, El. 
El Achaby« Starch biocomposites based on cellulose microfibers and nanocrystals extracted from alfa fibers (Stipa tenacissima) », Int.
El hamdouni, A.

El Meiche2,b and A.
After that, El Meiche et al. [13] studied the mechanical properties, behaviour using the same model for a hybrid composite laminate with a matrix cracking.
Al-Osta, A.
El Meiche, A.
[20] A.L.

Aliabdo et al. found that, marble powder as replacement for cement had a positive effect on the mechanical properties of concrete and mortar [3].
El-Hefnawi, Characterization of The Marble Sludge of The Shaq El Thoaban Industrial Zone, Egypt and Its Compatibility for Various Recycling Applications 6 (2012) 153-161
Ibrahim, et al., Health Risk Assessment of Marble Dust at Marble Workshops, Nature and Science, 9 (2011) 144-154
Prošek, et al., Influence of recycled concrete composition on its elastic stiffness, Key Engineering Materials 677 (2016) 288-291
Topič et al., Effect of PVA modification on the properties of cement composites, Acta Polytechnica 55 (2015) 64-75.

[2] Wenjing Zhang, Xichang Bao, Ling Wang, et al.
Anderson, et al.
El Gamal, D.
El Gamal.
[7] Hanxin Jia, Yunhua Xu, Yong Kang, et al.