| Cite this article: | 丁永发.工业废渣协同水泥固化渠道地基盐渍土强度及微观机理研究[J].灌溉排水学报,0,():-. |
| dingyongfa.工业废渣协同水泥固化渠道地基盐渍土强度及微观机理研究[J].灌溉排水学报,0,():-. |
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| Study on strength and micro mechanism of industrial waste residue cooperating with cement curing channel foundation saline soil |
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dingyongfa
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.College of Civil and Hydraulic Engineering, Ningxia University
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| Abstract: |
| 【Objective】 The concrete channel slab of the yellow diversion irrigation area of Yinbei Plain in Ningxia is vulnerable to frost swelling, corrosion and dissolution, and experimental research is carried out to solve the problem of saline land base engineering disease of the channel channel. 【Method】 For the salt content of 23% super sulfate soil in Ningxia, the influence of cement mixing, fly ash mixing, silicon ash mixing and desulfurization gypsum mixing on the unrestricted compressive strength of solidified saline soil was studied by orthogonal test method. XRD, SEM and EDS were used to explore the reaction products, microstructure and curing mechanism of solidified saline soil with two high strength ratios.【Result】 The results show that the primary and secondary orders of the compression strength are cement, silica ash, fly ash and desulfurization gypsum. The unconfined compressive strength of cement cured saline soil with fly ash, silica fume and desulfurized gypsum was significantly improved compared with that of uncured saline soil. And the 6% cement cement, 10% fly ash, 6% desulfurization gypsum, and 5% silica cement have the best curing effect. The synergistic interaction between the four curing agents promoted the silica and aluminum oxygen microlattice dissolution in the mixture. In combination with Ca2+ in soil to generate C-S-H, C-A-H gels and AFt, these gels stack with each other to form the overall spatial skeleton structure, increasing the compressive strength of cured saline soil; EDS energy spectrum analyzes the typical morphology generator in SEM micrograph and verifies the generator composition. 【Conclusion】 It is feasible to use fly ash, silicon ash and desulfurization gypsum with cement for channel saline soil solidification, It provides reference for the application of cement cement. |
| Key words: Cure saline soil; compressive strength; microstructure; triaxial test; Curing mechanism |
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