PMID- 33081063
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201103
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 12
IP  - 10
DP  - 2020 Oct 18
TI  - Desiccation Cracking Behavior of Polyurethane and Polyacrylamide Admixed Clayey 
      Soils.
LID - 10.3390/polym12102398 [doi]
LID - 2398
AB  - There has been a growing interest in polymer applied for soil reinforcement in 
      recent years. However, there little attention has been paid to the effects of 
      polymer on soil cracking behavior, and cracks significantly change soil strength 
      and hydraulic properties and alter reinforcement effectiveness. This study 
      investigated the desiccation cracking behavior of polyurethane (PU) and 
      polyacrylamide (PAM) admixed clayey soils with different polymer concentrations 
      by performing desiccation cracking tests. Scanning electron microscope (SEM) 
      observation was also carried out to obtain the internal structure of these soils. 
      The results show that PU and PAM addition both prolonged the initial evaporation 
      stage, accelerated later evaporation processes, and the effects were related to 
      polymer concentration. Final cracks morphology analyses show that PAM addition 
      slightly reduced the cracking and crushing degree and kept the soil relatively 
      intact, while PU addition slightly enhanced the cracking and crushing degree of 
      soil. In addition, PU and PAM addition both increased the width and length of 
      cracks. The scanning electron microscopy (SEM) analyses show that the effects of 
      polymer on soil evaporation and cracking could be concluded as: (1) storing water 
      in voids, (2) influencing water immigration channel, (3) providing space for soil 
      shrinkage, and (4) enhancing the connection between aggregates, which did not 
      fully come into play because of the existence of hydrogel form. These 
      achievements provide a certain basis for the research of desiccation cracking 
      behavior of polymer treated soil and make significant sense for the safe and 
      effective running of related projects.
FAU - Qi, Changqing
AU  - Qi C
AD  - School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, 
      China.
FAU - Bai, Yuxia
AU  - Bai Y
AD  - School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, 
      China.
FAU - Liu, Jin
AU  - Liu J
AUID- ORCID: 0000-0001-7654-255X
AD  - School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, 
      China.
FAU - Bu, Fan
AU  - Bu F
AD  - School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, 
      China.
FAU - Kanungo, Debi Prasanna
AU  - Kanungo DP
AD  - Council of Scientific and Industrial Research (CSIR)-Central Building Research 
      Institute (CBRI), Roorkee 247667, India.
FAU - Song, Zezhuo
AU  - Song Z
AUID- ORCID: 0000-0001-7968-7674
AD  - School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, 
      China.
FAU - He, Xilong
AU  - He X
AD  - School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, 
      China.
LA  - eng
GR  - 41877212/the National Natural Science Foundation of China/
GR  - 2019B17314/Fundamental Research Funds for the Central Universities/
PT  - Journal Article
DEP - 20201018
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC7603284
OTO - NOTNLM
OT  - clayey soil
OT  - desiccation cracking
OT  - evaporation
OT  - microstructure
OT  - polymer
COIS- The authors declare no conflict of interest.
EDAT- 2020/10/22 06:00
MHDA- 2020/10/22 06:01
PMCR- 2020/10/18
CRDT- 2020/10/21 01:02
PHST- 2020/09/08 00:00 [received]
PHST- 2020/10/10 00:00 [revised]
PHST- 2020/10/13 00:00 [accepted]
PHST- 2020/10/21 01:02 [entrez]
PHST- 2020/10/22 06:00 [pubmed]
PHST- 2020/10/22 06:01 [medline]
PHST- 2020/10/18 00:00 [pmc-release]
AID - polym12102398 [pii]
AID - polymers-12-02398 [pii]
AID - 10.3390/polym12102398 [doi]
PST - epublish
SO  - Polymers (Basel). 2020 Oct 18;12(10):2398. doi: 10.3390/polym12102398.