Abstract To study the influence of the coexistence condition of acidic and alkalic additives on the mechanical performance of stabilized clay based on the processes for obtaining the basic physical parameters of soil and analyzing the stabilization mechanism of ionic and alkalic soil stabilizers, an experiment on the mechanical behavior characteristics of stabilized clay was performed using different types of ionic and alkalic stabilizers through a series of laboratory tests. The following results are obtained. (1) Typical soil is low liquid limit clay, and the ionic stabilizer with an optimal content of 0.014% mass ratio to dry soil exhibits strong acidity. (2) As a result of its unique molecular structure, the double electric-combined water film becomes thin rapidly during compaction molding, in which the compactness of clay particle structure increases. (3) The 7-day unconfined compressive strength can be improved with different contents of the ionic stabilizer. (4) Except for the high lime soil mixture, the compaction degree of soil exerts a pronounced effect on the stabilization performance of an ionic stabilizer and the least compaction degree should be over 96%. (5) The unconfined compressive strength, indirect tensile strength, and freeze-thaw performance of the acid-alkali-stabilized soil demonstrate a gradually increasing tendency with an increase in curing time, however, the evolution characteristic of strength exhibits an advantageous superposition threshold value when compared to the alkali-stabilized clay. The neutralization reaction and oil membrane of soil particles will inhibit the later reaction processes of carbonation, pozzolanic, and hydration of lime-|cement-stabilized soil.
Fund:Supported by the Natural Science Foundation of Zhejiang Province of China (No. LQ14E080006) and the Natural Science Foundation of of China (No. 51408550)
QIU Xin,WANG Yu-jie,XU Jing-xian, et al. Mechanical Characteristics of Stabilized Clay under the Influence of both Acidic and Alkalic Additives[J]. Journal of Highway and Transportation Research and Development, 2017, 11(3): 39-47.
[1] LATIFI N, EISAZADEH A, MARTO A. Strength Behavior and Microstructural Characteristics of Tropical Laterite Soil Treated with Sodium Silicate-based Liquid Stabilizer[J]. Environmental Earth Sciences, 2014, 72(1):91-98.
[2] EISAZADH A, KASSIM K A, NUR H. Characterization of Phosphoric Acid-an6d Lime-stabilized Tropical Lateritic Clay[J]. Environmental Earth Sciences, 2011, 63(5):1057-1066.
[3] CHITTOORI B C S. Clay Mineralogy Effects on Long-term Performance of Chemically Treated Expansive Clays[D]. Texas:University of Texas at Arlington, 2008.
[4] PETRY T, DAS B. Evaluation of Chemical Modifiers and Stabilizers for Chemically Active Soils-Clays[J]. Transportation Research Record:Journal of the Transportation Research Board, 2001,1757:43-49.
[5] KATZ L, RAUCH A, LILJESTRAD H, et al. Mechanisms of Soil Stabilization with Liquid Ionic Stabilizer[J]. Transportation Research Record:Journal of the Transportation Research Board, 2001,1757:50-57.
[6] YANG Qing, LUO Xiao-hua, QIU Xin, et al. Analysis of Microstructure Characteristics and Stabilization Mechanism of Ionic Soil Stabilizer Treated Clay[J]. Journal of Highway and Transportation Research and Development, 2015, 32(11):33-40.(in Chinese)
[7] CUI De-shan. Research on the Reaction Mechanism of Adsorbed Water in Red Clay of Wuhan with Ionic Soil Stabilizer[D]. Wuhan:China University of Geosciences,2009.(in Chinese)
[8] LU Xue-song. Safety Evaluation System Research of Municipal Pipeline[C]//ASCE International Pipelines and Trenchless Technology Conference.[s.l.]:ASCE, 2010:1793-1801.
[9] LU Xue-song. Research on the Experimental Effect and Mechanism of Ionic Soil Stabilizer Reinforcing Wuhan Red Clay[D]. Wuhan:China University of Geosciences, 2010.(in Chinese)
[10] LU Xue-song, XIANG Wei, CAO Li-jing. Research on the ξ Otential of Ionic Soil Stabilizer Reinforcing Red Clay[J]. Subgrade Engineering, 2009(6):32-33. (in Chinese)
[11] XIANG Wei, CUI De-shan, LIU Li. Experimental Study on Sliding Soil of Ionic Soil Stabilizer[J]. Earth Science:Journal of China University of Geosciences, 2007,32(3):397-402. (in Chinese)
[12] XU Hai-qing. Research on Sliding Soil Reinforced by Ionic Soil Stabilization.[D].Wuhan:China University of Geosciences, 2008. (in Chinese)
[13] WANG Shang, ZHANG Yu-bin,ZHOU Jian-ping. Research on Reaction Mechanism and Application of Ionic Soil Stabilizer[J] Highway, 2005(7):192-194. (in Chinese)
[14] BHADRIRAJU V. A Laboratory Study to Address Swell, Shrink and Strength Characteristics of Deep Mixing Treated Expansive Clays[D]. Arlington:University of Texas at Arlington, 2005.
[15] ARGU Y. Stabilization of Light Grey and Red Clay Subgrade Soil Using LS-40 Chemical and Lime[D]. Addis Abab:Addis Ababa University, 2008.
[16] CHAWA P. Evaluation of Strength, Swell and Shrinkage Characteristics of Chemically Treated Soils from North Texas[D]. Arlington:University of Texas at Arlington, 2002.
[17] WANG Yi-min, JIA Juan, ZHANG Li-juan, et al. Microstructure and Strength Characteristics of ISS Stabilized Soil[J]. Journal of South China University of Technology, 2002, 30(9):96-99. (in Chinese)
[18] ZHANG Li-juan,WANG Yi-min,CHEN Ye-kai. Compaction Capacity of ISS Stabilized Soil[J]Journal of South China University of Technology, 2004,32(3):83-87. (in Chinese)
[19] GENG Yi-jun. Study on Action Mechanism and Road Performance of Improved Red Sandstone by EN-1 Soil Agent[D]. Chengdu:Southwest Jiaotong University, 2009. (in Chinese)
2017, Vol. 11 
