Abstract
A large number of sediments deposited in the riverbed of the Yellow River, which affected the long-term stability of water level of the Yellow River. In order to relieve the influence of sediment in the Yellow River, this study aims to use the Yellow River sediment to make artificial stone by the method of alkali activation. The chemical composition and physical properties of the Yellow River sediment as well as the stone were analyzed by X-ray diffraction (XRD), thermo-gravimetric analysis (TG/DTG) and scanning electron microscopy (SEM). The results showed that the compressive strength of the specimen had a significant improvement due to alkali-activation effect. At early stage, the compressive strength of specimen was unstable. In late period, the compressive strength of the specimen increased linearly. Moreover, there was an increase in the compressive strength with the increase in Ca(OH)2 dosage at 28 and 90 days. When the dosage of Ca(OH)2 was 12.5%, the strength of specimen reached to the maximum value of 6.9 MPa at 90 days. In addition, the results indicated that the reaction products were mainly the amorphous gel and CaCO3, and they improved the properties of specimen.
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Acknowledgements
The authors would like to express gratitude for the help of Mr. Huaqing Liu in the experimental design and the financial support by the Science and Technology Project of State Grid Corporation of China (GCB17201600152), National Natural Science Foundation of China (51878116) and the Fundamental Research Funds for the Central Universities (DUT18ZD219).
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Jing, X., Li, G., Zhang, Y. et al. Experimental Research on the Modification of the Yellow River Sediment. Iran J Sci Technol Trans Civ Eng 45, 1031–1037 (2021). https://doi.org/10.1007/s40996-021-00622-x
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DOI: https://doi.org/10.1007/s40996-021-00622-x