Materials Reports  2021, Vol. 35 Issue (z2): 158-162 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Adsorption Behavior of Montmorillonite on Polycarboxylate Superplasticizer |
| LIU Ling1, YI Junyong1, XIAO Gang2, FANG Wei1, CUI Jingliang1, TIAN Honglei1, ZHAO Yueqi1
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1 Jinan Rail Traffit Group Co. Ltd., Jinan 250000, China
2 China Railway Ten Bureau Group Co., Ltd., Jinan 250010, China |
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Abstract Adsorption behavior of polycarboxylate superplasticizer on montmorillonite is investigated to reveal its mechanism of the sensitivity of sand and gravel clay content. By ultraviolet spectrophotometric method, we systematically study the effect of solution concentration, adsorption time and ambient temperature on the process and adsorption amount of the adsorption behavior of polycarboxylate superplasticizer on montmorillonite;by using Fourier infrared spectroscopy,we characterize and analyze the microstructural changes of polycarboxylate superplasticizer embedded montmorillonite.The results showed that: the solution concentration of polycarboxylate has little effect on the interlayer adsorption amount of montmorillonite; the certain solution concentration of polycarboxylate superplasticizer has saturated adsorption capacity in the montmorillonite surface with the change of adsorption time; when the adsorption time is 90 min, the interlayer adsorption amount of montmorillonite reached maximum; the surface and interlayer adsorption amount of the polycarboxylate on the montmorillonite has an increasing trend with the adsorption temperature increasing; the montmorillonite which has absorbed the polycarboxylate has apparent absorption peaks and larger spacing of layer than before,so the polycarboxylate has embedded into montmorillonite. So the process of adsorption of polycarboxylate superplasticizer on montmorillonite includes surface and inserting adsorption.To lower the solution concentration of polycarboxylate, adsorption time and adsorption temperature, it is benefit to reduce the surface adsorption amount of the polycarboxylate on montmorillonite; it can effectively reduce the driving force that the polycarboxylate embedded into montmorillonite and reduce the adsorption amount with adsorption temperature lowering and adsorption time reducing. Finally achieve the purpose of improving adaptation of polycarboxylate superplasticizer to sand clay content.
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Published: 09 December 2021
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| Fund:This work was financially supported by the Transportation Science and Technology Plan Project of Shangdong Province (2020B06). |
| About author:: Ling Liu, senior engineer of Jinan Rail Transit Group Co. Ltd., has been engaged in research on urban rail transit and various concrete applications for many years. Published nearly 20 papers in domestic and foreign academic journals ; Apply for national invention patent and authorize 7 items to win' China Patent Excellence Award' as co-inventors once ; At the same time, many times to participate in the presidency of concrete related projects, research results obtained' Shandong Province Science and Technology Progress Third Prize' twice ; Was named' Jinan high-level talents'. The research work mainly focuses on urban rail transit projects, and realizes the practical application of smart and green rail transit through advanced planning and design, construction method and detection technology, combined with frontier concrete research. |
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