Mechanical, durability, and microstructure of soft clay stabilised with anionic biopolymer

Bagherinia, Majid

doi:10.1016/j.conbuildmat.2024.135343

Construction and Building Materials

2024

DOI: 10.1016/j.conbuildmat.2024.135343

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Mechanical, durability, and microstructure of soft clay stabilised with anionic biopolymer

Majid Bagherinia

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2024

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Cited by 3 publications

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Mechanical behavior and strengthening mechanism of loess stabilized with xanthan gum and guar gum biopolymers

Rong,

Deng,

Liang

et al. 2024

Mater. Res. Express

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The structural properties of loess are susceptible to change when subjected to external loads and complex environments, leading to various geological disasters. To investigate the mechanical behavior and strengthening mechanism of loess stabilized with biopolymers such as xanthan gum and guar gum, especially for soils with low bearing capacity and stability in engineering applications, we conducted research on the improvement of soil with xanthan gum and guar gum, tests including unconfined compressive strength, disintegration, direct shear, and microstructure tests were conducted. Among the four different dosages of biopolymers (0%, 0.5%, 1%, 2%) and four different curing ages (1 day, 3 days, 7 days, 14 days), the 2% content of biopolymer and 14 days had the greatest impact on the mechanical properties of loess, Both the compressive and shear strength, as well as the water stability of solidified loess, improve with higher content of xanthan gum and guar gum or prolonged curing time; however, the disintegration rate decreases. Microscopic analysis indicates that the biopolymers effectively fill the gaps between soil particles and attach to the particle surfaces, forming fibrous and reticular structures that improve the interparticle bonding and ultimately increase the strength and water stability of the loess. Xanthan gum and guar gum biopolymers can improve the mechanical properties and water stability of loess, enhance the erosion resistance and improve the water-holding capacity. These outcomes suggest that guar gum and xanthan gum biopolymers have the potential to serve as environmentally sustainable alternatives to conventional soil stabilizers.

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Mechanical behavior and strengthening mechanism of loess stabilized with xanthan gum and guar gum biopolymers

Rong,

Deng,

Liang

et al. 2024

Mater. Res. Express

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Kireç ve Sodyum Aljinat Biyopolimeri ile İyileştirilen Yüksek Plastisiteli Kil Zeminin Donma-Çözülme Özelliklerinin Araştırılması

Teber,

Akoğuz

2024

Karadeniz Fen Bilimleri Dergisi

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Bu çalışmada yüksek plastisiteli bir kil zeminin iyileştirilmesinde sodyum aljinat biyopolimerinin ve kireçle birlikte sodyum aljinat biyopolimerinin etkinliğinin iyileştirmeye etkisi araştırılmıştır. Bu amaçla kil zemine %0, %0,5, %1 ve %1,5 oranlarında biyopolimer ve %0, %2, %4 ve %6 oranlarında kireç ilave edilmiştir. 7 ve 28 günlük kür süresi sonunda mukavemet sonuçları serbest basınç mukavemeti deneyleri ile değerlendirilmiştir. Çevresel etkilerin etkisinin incelenebilmesi amacıyla da iyileştirilen zemin örnekleri 5 ve 10 döngü olarak donma-çözülmeye maruz bırakılmıştır. Sonuç olarak kür süreleri sonunda sodyum aljinat biyopolimerinin katkısız numunelere kıyasla daha yüksek serbest basınç mukavemetlerine sahip olduğu görülmüştür. Donma çözülme döngüleri sonucunda da biyopolimer katkısının mukavemet sonuçlarını iyileştirdiği belirlenmiştir. Kireçle birlikte biyopolimer kullanımında ise biyopolimerin zemin iyileştirmede kirecin etkinliğini artırdığı mukavemet deneyleri ve donma çözülme döngüleri sonucunda belirlenebilmiştir. Sonuç olarak çevre dostu bir biyopolimer olan sodyum aljinatın kil zeminlerin iyileştirilmesindeki mühendislik uygulamalarına olumlu katkılarının olabileceği değerlendirilmiştir.

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Experimental Study on the Physical and Mechanical Properties of Modified Clay Using Xanthan Gum and Guar Gum Composite Materials

Wan,

Ouyang,

Xiao

et al. 2024

Sustainability

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Biopolymer stabilization of soils has emerged as a viable solution for enhancing the engineering properties of soils in recent years. Xanthan gum and guar gum are two commonly used biopolymers. When combined, these materials have the ability to create stronger gels or gel strengths comparable to those achieved by using xanthan or guar gum individually, but at lower total concentrations. However, the extent of this synergistic viscosity-enhancing effect on soil improvement remains unclear. This study analyzes the effects of xanthan gum and guar gum on the physical and mechanical properties of clay under both individual and combined conditions using Atterberg limits tests, compaction tests, and triaxial consolidation undrained tests. At a 2% biopolymer content, the liquid limit of clay treated with a combination of XG and GG compounds increases by up to 8.0%, while the plastic limit increases by up to 3.9% compared to clay treated with a single colloid. With an increase in the mixing ratio, the optimal water content initially rises and then declines, peaking at 27.3%. The maximum dry density follows a pattern of initially decreasing and then increasing, with the lowest value recorded at 1.616 g·cm−3. Moreover, the shear strength of specimens treated with the XG and GG combination generally surpasses that of specimens treated with XG or GG alone. Furthermore, the combined treatment results in increased plasticity, highlighting its potential to enhance safety and stability in engineering applications.

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Mechanical, durability, and microstructure of soft clay stabilised with anionic biopolymer

Cited by 3 publications

References 47 publications

Mechanical behavior and strengthening mechanism of loess stabilized with xanthan gum and guar gum biopolymers

Mechanical behavior and strengthening mechanism of loess stabilized with xanthan gum and guar gum biopolymers

Kireç ve Sodyum Aljinat Biyopolimeri ile İyileştirilen Yüksek Plastisiteli Kil Zeminin Donma-Çözülme Özelliklerinin Araştırılması

Experimental Study on the Physical and Mechanical Properties of Modified Clay Using Xanthan Gum and Guar Gum Composite Materials

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