Arid
DOI10.1007/s11837-018-3163-y
Study on the Activity of Aeolian Sand Powder and Alkali Excitation Modification
Li, GenFeng; Shen, XiangDong; Yuan, Qi; Zou, YuXiao; Xiong, Lu
通讯作者Li, GenFeng
来源期刊JOM
ISSN1047-4838
EISSN1543-1851
出版年2019
卷号71期号:3页码:984-994
英文摘要Aeolian sand powder samples were made from aeolian sand which was obtained from the Kubuqi Desert of Inner Mongolia, China. With the method of boiling, the effects of different mass fraction sodium sulfate and sodium hydroxide on the dissolution of active substances of aeolian sand powder were studied. Meanwhile, based on the alkali activation theory, the type of activator, the quality fraction and the pre-curing temperature were shown to be variable, and the effect of aeolian sand powder modification is discussed through the test of the strength of aeolian sand powder-cement mortar. Micro-methods such as the total spectral semi-quantitative analysis, x-ray diffraction, field emission scanning electron microscopy, and nuclear magnetic resonance technology were used to study the mineral composition, microstructure and pore characteristics, and then to discuss the feasibility of aeolian sand powder as an alkali-activated material. The results showed that sodium sulfate had a better activation effect on the aeolian sand powder compared with that of sodium hydroxide. The activation rate of aeolian sand powder increases with the increase of the mass fraction of the activator, and, with the increase of the alkalinity of the solution, the dissolution of SiO2 and other active substances in the aeolian sand powder increases gradually. The effect of sodium sulfate on the aeolian sand powder is better than that of sodium hydroxide, and when the mass fraction of sodium sulfate is 2%, the volume of the aeolian sand powder is 15%. When the pre-curing temperature is 35 degrees C, the modification effect of aeolian sand powder is better and the activity index reaches 108.2%. Under the effects of the sodium sulfate, 2.2% and 2.6% active SiO2 and CaO were, respectively, dissolved from the aeolian sand powder. Then, a polymerization reaction occurred under the combined action of the temperature, which generated the needle-shaped hydration product ettringite with a good development state. Meanwhile, the ratio of the inner 20-nm hole of the aeolian sand powder-cement mortar specimen reached 85.69%, and there were many disconnected capillary pores, the irreducible fluid saturation was as high as 94.311%, and the gelling property was good.
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000458866900015
WOS关键词POZZOLANIC MATERIAL ; CEMENT ; BEHAVIOR ; TRENDS ; WATER
WOS类目Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Mineralogy ; Mining & Mineral Processing
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering ; Mineralogy ; Mining & Mineral Processing
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/216583
作者单位Mongolia Agr Univ, Coll Water Conservancy & Civil Engn Inner, Hohhot 010018, Peoples R China
推荐引用方式
GB/T 7714
Li, GenFeng,Shen, XiangDong,Yuan, Qi,et al. Study on the Activity of Aeolian Sand Powder and Alkali Excitation Modification[J],2019,71(3):984-994.
APA Li, GenFeng,Shen, XiangDong,Yuan, Qi,Zou, YuXiao,&Xiong, Lu.(2019).Study on the Activity of Aeolian Sand Powder and Alkali Excitation Modification.JOM,71(3),984-994.
MLA Li, GenFeng,et al."Study on the Activity of Aeolian Sand Powder and Alkali Excitation Modification".JOM 71.3(2019):984-994.
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