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DOI	10.1061/(ASCE)GT.1943-5606.0002764
	Hysteresis Model for Water Retention Characteristics of Water-Absorbing Polymer-Amended Soils
	Saha, Abhisekh; Sekharan, Sreedeep; Manna, Uttam
通讯作者	Saha, A (corresponding author)，Indian Inst Technol Guwahati, Dept Civil Engn, Gauhati 781039, Assam, India.
来源期刊	JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
ISSN	1090-0241
EISSN	1943-5606
出版年	2022
卷号	148 期号:4
英文摘要	Water absorbing polymers (WAPs) are gaining attention in the field of geotechnical engineering, with application to bioengineered slopes, vegetation growth on landfill covers, and maintenance of green infrastructure in arid climate regions. WAP-amended soil is often exposed to alternate drying-wetting cycles, which influence its water retention characteristics. Determining the hysteresis in water retention characteristics of WAP-amended soils is crucial to evaluate their hydraulic performance with time. The present study proposes a methodology to measure the hysteresis in soil-water retention curve (SWRC) of WAP-amended soils subjected to alternate drying-wetting cycles. For this purpose, the drying-wetting SWRC of three different textured soils (sand, silt loam, and clay loam) were determined for varying WAP concentrations (0.1%, 0.2%, and 0.4% on weight-by-weight basis). Fourier transform infrared (FTIR) spectroscopy was used to confirm degradation in the polymer chain of the WAPs with the progressive wetting-drying cycles, which significantly affected the hysteresis phenomenon. A predictive model was proposed to estimate the wetting SWRC from the drying SWRC for WAP-amended soils, which is valid until the complete degradation of the WAPs. The proposed model was validated for two consecutive drying-wetting cycles for the selected soils with varying WAP concentrations, which showed its effectiveness for predicting hysteresis behavior in SWRC of WAP-amended soils. Further, the degree of hysteresis in SWRC of WAP-amended soil was quantified after each drying-wetting cycle. The experimental results revealed that the presence of WAP and its degradation with time significantly increased the degree of hysteresis in SWRC.
英文关键词	Water-absorbing polymer (WAP) Hysteresis Water retention curve Prediction Degradation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000755246900001
WOS关键词	SUPERABSORBENT POLYMERS ; HYDROGEL AMENDMENT ; AVAILABLE WATER ; SANDY ; GROWTH ; SURVIVAL
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS研究方向	Engineering ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376193
作者单位	[Saha, Abhisekh; Sekharan, Sreedeep] Indian Inst Technol Guwahati, Dept Civil Engn, Gauhati 781039, Assam, India; [Manna, Uttam] Indian Inst Technol Guwahati, Dept Chem, Gauhati 781039, Assam, India; [Manna, Uttam] Indian Inst Technol Guwahati, Ctr Nanotechnol, Gauhati 781039, Assam, India
推荐引用方式 GB/T 7714	Saha, Abhisekh,Sekharan, Sreedeep,Manna, Uttam. Hysteresis Model for Water Retention Characteristics of Water-Absorbing Polymer-Amended Soils[J],2022,148(4).
APA	Saha, Abhisekh,Sekharan, Sreedeep,&Manna, Uttam.(2022).Hysteresis Model for Water Retention Characteristics of Water-Absorbing Polymer-Amended Soils.JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING,148(4).
MLA	Saha, Abhisekh,et al."Hysteresis Model for Water Retention Characteristics of Water-Absorbing Polymer-Amended Soils".JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING 148.4(2022).