Mechanical and physical properties of inorganic polymer cement made of iron-rich laterite and lateritic clay: A comparative study
Mechanical and physical properties of inorganic polymer cement made of iron-rich laterite and lateritic clay: A comparative study
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DOI：
10.1016/j.cemconres.2020.106320
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发表时间：
2021-02-01
影响因子：
11.4
通讯作者：
Melo, Uphie Chinje
中科院分区：
文献类型：
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作者：
Kaze, Cyriaque Rodrigue;Lecomte-Nana, Gisele Laure;Melo, Uphie Chinje
本工作选择了两种不同的红土(红土Lac和富铁红土Lai，铁含量分别为13.07和49.34 wt%)，并在600℃下焙烧，得到的煅烧红土LAI600和LAC600分别与碱性溶液(硅酸盐模数1.35)或酸性溶液(pH LAC下的磷酸溶液(48 Mpa))混合，比较了在碱性条件下的行为(LAI(6 Mpa)和Lt；LAC(29 Mpa))。相应地，酸性产物具有致密的结构(孔隙率较低)，并含有无定形的铁/铝磷酸盐相，如闪锌矿(FePO4)、水合磷酸氢铁(Fe3H15(PO4)(8)中心点4H(2)O)、铁沸石(AlFe2Na2(PO4)(3))和磷酸铁钠(Na3Fe2(PO4)(3))，穆斯堡尔谱和电子顺磁共振光谱证实了这一点。
In this work, two different laterites (iron contents of 13.07 and 49.34 wt%, respectively, for lateritic clay, LAC, and iron-rich laterite, LAI) were selected and calcined at 600 degrees C. The obtained calcined laterites, namely LAI600 and LAC600, were separately mixed with an alkaline solution (silicate modulus of 1.35) or an acidic solution (phosphoric acid solution at pH LAC (48 MPa)) compared to the behavior obtained under alkaline conditions (LAI (6 MPa) < LAC (29 MPa)). Accordingly, the acidic products exhibited a dense structure (with lower porosity) and contained amorphous iron/aluminium phosphate phases such as berlinite (FePO4), iron hydrogen phosphate hydrate (Fe3H15(PO4)(8)center dot 4H(2)O), ferrowyllieite (AlFe2Na2(PO4)(3)) and sodium iron phosphate (Na3Fe2(PO4)(3)) arising from the alteration of iron minerals in an acidic medium, confirmed by Mossbauer spectroscopy and electron paramagnetic resonance spectroscopy.Y