Experimental Study on the Effect of NH3·H2O on EngineeringProperties of Red Clay in Guilin

MU Chun-mei; WEI Yu-xi

doi:10.11988/ckyyb.20181356

PDF(4374 KB)

Journal of Changjiang River Scientific Research Institute ›› 2020, Vol. 37 ›› Issue (5) : 113-119. DOI: 10.11988/ckyyb.20181356

ROCK SOIL ENGINEERING

Experimental Study on the Effect of NH₃·H₂O on EngineeringProperties of Red Clay in Guilin

MU Chun-mei^1,2, WEI Yu-xi¹

Author information +

History +

Abstract

In the aim of exploring the effect of nitrogen fertilizer pollution on the physical and mechanical properties of red clay, the change regularity of typical red clay from Yanshan mountain, Guilin was analyzed. The red clay specimens were immersed in ammonia (NH₃·H₂O) solution with ammonia concentration (0, 4.5%,9.5%, 13.5%, 18%) and curing time (1 d, 7 d, 14 d) as controlling factors. Results show that the mass, moisture content, specific gravity, liquid limit and plastic limit all increased with the increase of ammonia concentration and curing time; but compression modulus decreased, while compressibility of soil is enhanced. The alkali-soil interaction is the fundamental cause of the weakening in physical and mechanical performance of alkali-contaminated red clay in Guilin area. Such interaction results in the dissolution of the binder between red clay particles and the formation of flocculants, hence changing the original stable state of the structure.

Key words

red clay / ammonia contaminated / physical and mechanical properties / curing time / experimental study / Yanshan area of Guilin

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

MU Chun-mei, WEI Yu-xi. Experimental Study on the Effect of NH₃·H₂O on EngineeringProperties of Red Clay in Guilin[J]. Journal of Changjiang River Scientific Research Institute. 2020, 37(5): 113-119 https://doi.org/10.11988/ckyyb.20181356

References

[1] 蒙高磊,刘之葵,雷轶. 红黏土的研究现状和展望[J].路基工程,2014(4):7-11.
[2] 陈学军,齐运来,卢丽霞,等.不同备样方法对桂林红黏土最优含水率及最大干密度的影响[J].安全与环境工程,2013,20(5):136-139.
[3] MU C M, HAN K K, LIU Y. Analysis of the Failure of a Polluted Red Clay Foundation in the North Guilin Karst Area[C]∥Proceedings of the 6^th Asia-Pacific Conference on Unsaturated Soils. Guilin, China, October 23-26, 2015: 899-902.
[4] 牟春梅,李佰锋. 有机质含量对软土力学性质影响效应分析[J].水文地质工程地质,2008,35(3):42-46.
[5] 刘宝臣,牟春梅.有机质污染红黏土地基加固效果的力学效应分析[J].工业建筑,2010,40(2):128-131.
[6] SRIDHARAN A, NAGARAJ T S, SIVAPULLAIAH P V. Heaving of Soil Due to Acid Contamination[C]∥Proceedings of the 10^th International Conference on Soil Mechanics and Foundation Engineering. Stockholm, June 15-19, 1981: 383-386.
[7] HO Y A,PUFAHL D E,BARBOUR S L. Effects of Brine Contamination on Volume Change Behavior of Fine-grained Soils[C]∥Materials from Theory to Practice,Proceedings of the 42^nd Canadian Geotechnical Conference,Winnipeg,Canada. October 23-25,1989:272-279.
[8] RAJPUT V S, HIGGINS A J, SINGLE M E. Cleaning of Excavated Soil Contaminated with Hazardous Organic Compounds by Washing[R]. Alexandra, VA: Water Environment Federation of the USA, 1994.
[9] PICCOLI S, BENOIT J. Geo-environmental Testing Using the Envirocone7[C]∥Proceedings of the ASCE Specialty Conference Geoenvironment 2000. New Orleans, Louisiana, February 24-26, 1995: 93-104.
[10]刘汉龙,朱春鹏,张晓璐.酸碱污染土基本物理性质的室内测试研究[J].岩土工程学报,2008,30(8):1213-1217.
[11]朱春鹏,刘汉龙,沈扬. 酸碱污染土强度特性的室内试验研究[J].岩土工程学报,2011,33(7):1146-1150.
[12]朱春鹏,刘汉龙,张晓璐.酸碱污染土压缩特性的室内测试研究[J]. 岩土工程学报,2008,30(8):1478-1482.
[13]顾季威.酸碱废液侵蚀地基土对工程质量的影响[J].岩土工程学报,1988,10(4):73-78.
[14]赵莎,陈筠,赵鹏,等.贵阳碱污染红黏土物理力学性质室内试验研究[J].贵州大学学报(自然科学版),2017,34(1):77-82.
[15]陈筠,王麒,于明圆,等.碱污染红黏土抗剪强度及破裂面微观结构特征研究[J].工程地质学报,2018,26(5):1300-1310.
[16]牟春梅,韦瑜玺,张岩. 桂林地区碱污染红黏土力学效应弱化的试验研究[J]. 桂林理工大学学报,2019,39(2):376-382.
[17]牟春梅,韦瑜玺. 桂林地区酸、碱污染红黏土力学效应弱化的试验研究[J]. 重庆大学学报,2019,42(6):109-118.
[18]牟春梅,付青,刘奕畅. 桂林地区酸污染红黏土力学效应弱化的试验研究[J]. 河南科技大学学报(自然科学版),2019,40(4):52-57.
[19]任礼强,黄英,樊宇航,等.碱污染红土的抗剪强度特性及碱土作用特征研究[J].水文地质工程地质,2014,41(5):75-81.
[20]顾展飞,刘琦,卢耀如,等.酸碱及可溶盐溶液对桂林红黏土压缩性影响实验研究[J].中国岩溶,2014,33(1):37-43.
[21]陈筠,赵鹏,何维锋,等.碱污染红黏土抗剪强度特性室内试验研究[J].长江科学院院报,2017,34(12):94-100.
[22]孙重初.酸液对红黏土物理力学性质的影响[J]. 岩土工程学报,1989,11(4):89-93.
[23]蒋能慧,刘光崧. 碳酸氢铵和氨水在土壤中的扩散和损失[J]. 土壤学报,1980,17(1):89-93.
[24]张晓璐. 酸、碱污染土的试验研究[D]. 南京:河海大学,2007.