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利用工业固体废弃物制备烧胀陶粒的研究进展

ISSN号：1005-023X
期刊名称：《材料导报》
时间：0
分类：TB[一般工业技术]
作者机构：[1]School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China, [2]College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063000, China, [3]School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China
相关基金：Funded by the Major State Basic Research Development Program of China（“973” Program）（No-2015CB655101）; Natural Science Foundation of Hebei（No-E2016209283）; National Natural Science Foundation of China（No-51402003）; Open Foundation of Road Bridge and Structural Engineering Key Laboratory WHUT,China（No-DQZDJJ201504）

关键词：腐蚀剂答案, 水泥, 苍蝇灰, C-S-H, 微观结构, 艾尔[4, ]/Si, /Si

中文摘要：

借助于 ²⁹ Si 和 ²⁷旋转原子磁性的回声(妈 NMR )的艾尔魔力角度与 deconvolution 技术，X光检查衍射( XRD )，扫描电子显微镜学( SEM )以及精力结合了散X光检查系统( EDX )， 5 个wt%腐蚀剂答案的效果( viz 。 5 wt% Na ₂那么₄, MgSO ₄, Na2SO4+NaCl 和 Na ₂那么 ₄+NaCl+Na₂在包含 30 wt%苍蝇灰的波特兰水泥的 C-S-H 微观结构上的公司₃)是在 MgSO ₄答案， Mg ²⁺支持的 investigated.The 结果表演 C-S-H 由的 decalcification 那么₄^2-，增加的硅酸盐 tetrahedra 聚合和 C-S-H 的吝啬的链长度( MCL )。然而，为 Si ⁴⁺ 的艾尔 ³⁺ 的代替的度(艾尔[4 ]/Si ) 在浆糊不显然变化。Na ² C-S-H 上的 ⁴ 答案没被 NaCl 答案显著地因此影响，当时 MCL 和艾尔[4 ] 在苍蝇 ashcement 浆糊的 C-S-H 的 /Si 稍微变化。然而， C-S-H 由的 decalcification 那么苍蝇灰由的₄^2-和公司₃^2-攻击，以及激活₄^2-攻击将因此增加 MCL 和艾尔[ 4 ] /Si ，在 Na ₂4腐蚀， MgSO ₄或 Na ₂那么₄ +NaCl 协作腐蚀。

英文摘要：

By means of ~（29）Si and ~（27）Al magic angle spinning nuclear magnetic resonance（MAS NMR） combined with deconvolution technique, X-ray diffraction（XRD）, scanning electron microscopy（SEM） as well as energy dispersive X-ray system（EDX）, the effect of 5 wt% corrosive solutions（ viz. 5 wt% Na_2SO_4, MgSO_4, Na_2SO_~（4＋）Na Cl and Na_2SO_~（4＋）Na Cl＋Na_2CO_3） on C-S-H microstructure in portland cement containing 30 wt% fly ash was investigated.The results show that, in MgSO_4 solution, Mg2＋ promotes the decalcification of C-S-H by SO_4~（2-）,increasing silicate tetrahedra polymerization and mean chain length（MCL） of C-S-H. However, the substituting degree of Al~（3＋） for Si~（4＋）（Al[4]/Si） in the paste does not change evidently. Effect of Na_2SO_4 solution on C-S-H is not significantly influenced by Na Cl solution, while the MCL and Al[4]/Si of C-S-H in fly ashcement paste slightly change. However, the decalcification of C-S-H by SO_4~（2-） and CO_3~（2-） attack, as well as the activation of fly ash by SO_4~（2-） attack will increase the MCL and Al[4]/Si, which are both higher than that under Na_2SO_4 corrosion, MgSO_4 or Na_2SO_4 ＋Na Cl coordination corrosion.

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