The influence of curing conditions on the mechanical properties and leaching of inorganic polymers made of fayalitic slag
The influence of curing conditions on the mechanical properties and leaching of inorganic polymers made of fayalitic slag
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养护条件对铁铁铝矿渣无机聚合物力学性能及浸出的影响
DOI：
10.1007/s11705-017-1622-6
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发表时间：
2017
影响因子：
4.5
通讯作者：
Y. Pontikes
中科院分区：
文献类型：
--
作者：
R. I. Iacobescu;Valerie Cappuyns;T. Geens;L. Kriskova;S. Onisei;P. Jones;Y. Pontikes
本文研究了养护条件对水淬法陶渣制备无机聚合物砂浆的力学性能和浸出性能的影响。将矿渣、骨料和活化液混合制成3种类似的IP砂浆，分别在3种不同环境下养护28 d: a) 20℃、相对湿度（RH） 50% （T20RH50）、b) 20℃、相对湿度≥90% （T20RH90）、C) 60℃、相对湿度~ 20% （T60RH20）。抗压强度（EN 196-1）在19 MPa （T20RH50）和31 MPa （T20RH90）之间变化。这被发现是由于固化时形成的裂缝。进行了地球化学模拟和两次浸出试验，即EA NEN 7375罐试验和BS EN 12457-1单批试验。结果表明，即使在高pH条件下，Cu、Ni、Pb、Zn和As也会发生浸出，罐式试验的浸出液pH值在10 ~ 11之间，单批次浸出液pH值在12 ~ 12.5之间。在单批试验中获得的As、Cu和Ni的浸出值低于佛兰德法规对非形状材料的要求。
This study reports on the impact of the curing conditions on the mechanical properties and leaching of inorganic polymer (IP) mortars made from a water quenched fayalitic slag. Three similar IP mortars were produced by mixing together slag, aggregate and activating solution, and cured in three different environments for 28 d: a) at 20 °C and relative humidity (RH) ~ 50% (T20RH50), b) at 20 °C and RH≥90% (T20RH90) and c) at 60 °C and RH ~ 20% (T60RH20). Compressive strength (EN 196-1) varied between 19 MPa (T20RH50) and 31 MPa (T20RH90). This was found to be attributed to the cracks formed upon curing. Geochemical modelling and two leaching tests were performed, the EA NEN 7375 tank test, and the BS EN 12457-1 single batch test. Results show that Cu, Ni, Pb, Zn and As leaching occurred even at high pH, which varied between 10 and 11 in the tank test’s leachates and between 12 and 12.5 in the single batch’s leachates. Leaching values obtained were below the requirements for non-shaped materials of Flemish legislation for As, Cu and Ni in the single batch test.