东南大学土木工程学院,江苏 南京210096
杨卫东(1996—),男,硕士研究生。主要从事土工材料方面的研究。E‑mail:2628553891@qq.com
黎冰(1981—),男,副教授,博士。主要从事土力学与岩土工程方面的教学与科研工作。E‑mail: lbershui@seu.edu.cn
收稿:2021-03-07,
修回:2021-05-06,
纸质出版:2022-10-28
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杨卫东,黎冰,马文昊.降低气泡混合轻质土吸水性的试验研究[J].防灾减灾工程学报,2022,42(05):1061-1068.
YANG Weidong,LI Bing,MA Wenhao.Experimental Study on Reducing Water Absorption of Air‑foam Treated Lightweight Soil[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(05):1061-1068.
杨卫东,黎冰,马文昊.降低气泡混合轻质土吸水性的试验研究[J].防灾减灾工程学报,2022,42(05):1061-1068. DOI: 10.13409/j.cnki.jdpme.20210307001.
YANG Weidong,LI Bing,MA Wenhao.Experimental Study on Reducing Water Absorption of Air‑foam Treated Lightweight Soil[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(05):1061-1068. DOI: 10.13409/j.cnki.jdpme.20210307001.
气泡混合轻质土的孔隙率高,处于地下水位以下时,随着时间的推移其部分孔隙会被水填充,使其丧失轻质特性,进而威胁到工程安全,所以研究如何降低气泡混合轻质土的吸水性很有必要。分别制备了掺入憎水剂、减水剂、早强剂和粉煤灰(内掺和外掺)的气泡混合轻质土试样,通过吸水性试验和相容性试验研究了掺入不同外加剂对于降低气泡混合轻质土吸水性的效果,并分析了外加剂与气泡混合轻质土之间的相容性问题。试验结果表明,掺入适量的憎水剂、减水剂、早强剂和粉煤灰都能降低气泡混合轻质土的吸水性,但降低效果各不相同。内掺10%的粉煤灰时降低气泡混合轻质土的吸水性效果最佳,可将气泡混合轻质土的吸水率降低4.8%,且内掺粉煤灰不仅可以降低气泡混合轻质土的吸水率,还可以在一定程度上替代水泥的作用,节省造价,在工程中具有更好的实用性。掺入减水剂后消泡现象明显,导致制备的气泡混合轻质土密度明显增大,所以掺入减水剂对于降低气泡混合轻质土的吸水性效果最差。虽然掺入适量的憎水剂和早强剂也可以降低气泡混合轻质土的吸水率,但效果有限,且也会因为相容性问题引起消泡进而造成土体密度的明显增大。
The porosity of the air-foam treated lightweight soil is high. When air-foam treated lightweight soil is lower than the groundwater level, part of its pores will be filled with water and its lightweight feature will not work with elapsed time, threatening the safety of the project. Therefore, it is necessary to study how to reduce the water absorption of air-foam treated lightweight soil. In this study, the air-foam treated lightweight soil samples were prepared with water-repellent admixture, water reducing agent, early-strength admixture and fly ash (mixed in and out). Through the water absorption and compatibility tests, the effect of different admixtures on reducing the water absorption of air-foam treated lightweight soil was studied, and the compatibility between the admixture and the bubble mixed lightweight soil is analyzed. The experimental results show that, adding appropriate amount of water-repellent admixture, water reducing agent, early-strength admixture and fly ash can reduce the water absorption of air-foam treated lightweight soil, but the reduction effect is different. Adding 10% fly ash is most effective on reducing the water absorption of the air-foam treated lightweight soil, and it can reduce the water absorption by 4.8%. In addition, internal adding fly ash can not only decrease the water absorption rate of the air-foam treated lightweight soil, but also can replace cement to save cost to some extent, having better practicability in engineering application. After adding water reducing agent, the defoaming phenomenon is obvious, which leads to the significantly increased density of the air-foam treated lightweight soil, so the effect of water reducing agent on reducing the water absorption of air-foam treated lightweight soil is the worst. Although mixing appropriate amounts of water-repellent and early-strength admixtures can also reduce the water absorption of air-foam treated lightweight soil, the effect is not good, and due to the defoaming phenomenon caused by the compatibility issues, such measure lead to the increase of soil density.
三岛信雄 , 长尾和之 . 気泡セメント盛土工法(FCB 工 法)の研究 [J]. 土木学会志 , 1994 ( 1 ): 18 ‑ 21 .
Nobuomiyoshi , Kazuyukikakei . Study on geotechnical method of bubble mixed cement filling [J]. Journal of the Japan Society of Civil Engineers , 1994 ,( 1 ): 18 ‑ 21 . (in Japanese)
蔡力 , 陈忠平 , 吴立坚 . 气泡混合轻质土的主要力学特征及应用综述 [J]. 公路交通科技 , 2005 , 22 ( 12 ): 71 ‑ 74 .
Cai L , Chen Z P , Wu L J . Foamed cement banking mechanics and its application [J]. Journal of Highway and Transportation Research and Development , 2005 , 22 ( 12 ): 71 ‑ 74 . (in Chinese)
陈磊 . 浅谈气泡混合轻质土在市政工程中的应用 [J]. 建材与装饰 , 2019 ,( 10 ): 230 ‑ 231 .
Chen L . Application of air‑foam treated lightweight soil in Municipal Engineering [J]. Building materials and decoration , 2019 ,( 10 ): 230 ‑ 231 . (in Chinese)
陈忠平 , 王树林 . 气泡混合轻质土及其应用综述 [J]. 中外公路 , 2003 , 23 ( 5 ): 117 ‑ 120 .
Chen Z P , Wang S L . The review and application of foamed lightweight soil [J]. Joural of China&Foreign Highway , 2003 , 23 ( 5 ): 117 ‑ 120 . (in Chinese)
邓飞 . 泡沫轻质土在杭州东站软土路基地基处理中的应用 [J]. 铁道标准设计 , 2018 , 62 ( 3 ): 31 ‑ 35 .
Deng F . Application of air‑foam treated lightweight soil in foundation treatment of Hangzhou East Railway Station soft soil base [J]. Railway Standard Design , 2018 , 62 ( 3 ): 31 ‑ 35 . (in Chinese)
李东民 , 毕伟涛 , 李春轩 , 等 . 气泡混合轻质土在陕北淤地坝地基台背回填中的应用研究 [J]. 路基工程 , 2019 ,( 4 ): 64 ‑ 68 .
Li D M , Bi W T , Li C X , et al . Study on application of air‑foam treated lightweight soil in back filling of warping dam foundation in Shanbei [J]. Subgrade Engineering , 2019 ,( 4 ): 64 ‑ 68 . (in Chinese)
汪旻磊 . 气泡轻质混合土在山区城市道路高填方设计中的应用 [J]. 城市道桥与防洪 , 2019 ( 6 ): 262‑263+280+28 ‑ 29 .
Wang M L . Application of air‑foam treated lightweight soil in high fill design of urban road in mountainous area [J]. Urban Roads and Bridges and Flood Control , 2019 ( 6 ): 262‑263+280+28 ‑ 29 . (in Chinese)
Takeshi N , Taichi H , Jun O , et al . Absorption property evaluation of light weight soil with air foam due to different mixing conditions [J]. Journal of the Society of Materials Science , 2010 , 59 ( 1 ): 68 ‑ 73 .
何国杰 , 郑颖人 , 杨晨曦 . 气泡混合轻质土的吸水特性和抗冻融循环性能 [J]. 后勤工程学院院报 , 2008 , 24 ( 4 ): 6 ‑ 8 .
He G J , Zhen Y R , Yang C X . Water absorption and freeze thaw cycle resistance of air‑foam treated lightweight soil [J]. Journal of Logistics Engineering College , 2008 , 24 ( 4 ): 6 ‑ 8 . (in Chinese)
周宏楚 . 气泡混合轻质土用于冻土地基隔热保温的应用技术研究 [D]. 长沙 : 中南大学 , 2008 .
Zhou H C . Study on application technology of air‑foam treated lightweight soil for thermal insulation of frozen soil foundation [D]. Changsha : Central South University , 2008 . (in Chinese)
徐佳辉 . 冻融循环作用下气泡混合轻质土的性能劣化研究 [D]. 南京 : 河海大学 , 2018 .
Xu J H . Study on performance degradation of air‑foam treated lightweight soil under freeze‑thaw cycles [D]. Nanjing : Hohai University , 2018 . (in Chinese)
王勇 . 干湿循环作用下气泡混合轻质土的性能劣化研究 [D]. 南京 : 河海大学 , 2018 .
Wang Y . Study on performance degradation of air‑foam treated lightweight soil under freeze‑thaw cycles [D]. Nanjing : Hohai University , 2018 . (in Chinese)
杜杰 , 黎冰 , 王勇 , 等 . 硫酸钠环境下气泡混合轻质土的抗干湿性能研究 [J]. 防灾减灾工程学报 , 2020 , 40 ( 4 ): 581 ‑ 588 .
Du J , Li B , Wang Y , et al . Study on resistance to dry⁃wet cycles of air⁃foam treated light soil under sodium sulfate environment [J]. Journal of Disaster Prevention and Mitigation Engineering , 2020 , 40 ( 4 ): 581 ‑ 588 . (in Chinese)
Gökçe H S , Hatungimana D , Ramyar K . Effect of fly ash and silica fume on hardened properties of foam concrete [J]. Construction and Building Materials , 2019 , 194 ( 10 ): 1 ‑ 11 .
丁曼 . 防水性泡沫混凝土研究 [D]. 长沙 : 湖南大学 , 2011 .
Ding M . Study on waterproof foam concrete [D]. Changsha : Hunan University , 2011 . (in Chinese)
杨钱荣 , 王冰 , 裴闪闪 , 等 . 脱硫石膏泡沫混凝土性能及相关性分析 [J]. 粉煤灰综合利用 , 2013 ,( 5 ): 3 ‑ 6 .
Yang Q R , Wang B , Pei S S , et al . Performance and correlation analysis of desulphurization gypsum foam concrete [J]. Comprehensive Utilization of Fly Ash , 2013 ,( 5 ): 3 ‑ 6 . (in Chinese)
Gerdes A , Oehmichen D , Preindl B , et al . Chemical reactivity of silanes in cement‑based materials [C]∥ Proceedings of hydrophobic IV , water repellent treatment of building materials . Zurich : Aedificatio Publisher , 2005 : 47 ‑ 58 .
李崇智 , 冯乃谦 , 李永德 . 聚羧酸类高性能减水剂的研究进展 [J]. 化学建材 , 2001 ,( 6 ): 38 ‑ 41 .
Li C Z , Feng N Q , Li Y D . Research progress of polycarboxylate superplasticizer [J]. Chemical building materials , 2001 ,( 6 ): 38 ‑ 41 . (in Chinese)
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