Evaluation and mechanism of anionic waterborne polyurethane dispersion for chemical sand stabilisation

Zang, Yunxiao; Gong, Wei; Xie, Hao; Du, Zechuan; Liu, B.; Chen, H.

doi:10.1080/14658011.2016.1183335

Cited by 4 publications

(5 citation statements)

References 30 publications

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Section: Chemical Sand Fixation Measuresmentioning

confidence: 99%

“…As shown in Figure 4, it is the consolidation layer formed after the application of a new sand fixing agent called ADNB(The aqua-dispersing-nano-binder) developed by our team [82]. Thus, the sand fixing agent can fix sand, resist wind erosion, and retain water [83][84][85][86]. During this process, the silt and clay particles are bonded to form soil agglomerates of different sizes, and their content does not change significantly [87][88][89][90].…”

Section: Chemical Sand Fixation Measuresmentioning

confidence: 99%

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Occurrence Regularity of Silt–Clay Minerals in Wind Eroded Deserts of Northwest China

Liu

Sun

et al. 2021

Sustainability

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Wind erosion desertification is the most serious type of land degradation in Northwest China, so it is an important task for ecological management in the region. As the core of ecological management, soil quality is mainly affected by the presence of silt–clay content. Therefore, the grasp of its occurrence regularity is the key to controlling wind erosion desertification. At present, research on silt–clay contents is mainly independent in each local area and lacks integrity, which makes it difficult to meet the overall evaluation and planning requirements. To this end, this paper reviewed the related studies on the occurrence and control of wind erosion desertification in recent years and collected nearly 300 relevant silt–clay content data points. We studied the occurrence regularity of silt–clay content during the occurrence and treatment of wind erosion desertification and revealed the mechanism of silt–clay content in different processes. On this basis, the degree of wind erosion desertification in the major areas of Northwest China in the last five years was evaluated by calculations based on soil typing theory, and the fractal dimension interval (2.41–2.53) for the critical discrimination of desertification in these areas was obtained. The results showed that there were obvious distribution intervals of silt–clay content for different degrees of wind erosion desertification. Qualitative changes in soil quality during degradation ranged from light to moderate wind erosion desertification. The occurrence and control of wind erosion desertification were largely affected by the processes of silt–clay particles loss and aggregation. Among the three main treatment measures, biological measures enhanced silt–clay content most significantly. In this study, the occurrence regularity of silt–clay minerals in wind erosion desertification in Northwest China was revealed as a whole. This study provided a preliminary overall judgement of the dynamic evolution of wind erosion desertification, which provided a reference for the overall evaluation and global governance planning of wind erosion desertification in Northwest China.

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Section: Chemical Sand Fixation Measuresmentioning

confidence: 99%

Section: Chemical Sand Fixation Measuresmentioning

confidence: 99%

Occurrence Regularity of Silt–Clay Minerals in Wind Eroded Deserts of Northwest China

Liu

Sun

et al. 2021

Sustainability

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“…In other words, if flow direction is horizontal to surface, erosion will reduce. Zang et al ( 2016) showed that an anionic waterborne polyurethane could treat sand with zero compressive strength to achieve compressive strength larger than 1.5 MPa in a concentration lower than 10%w. It has been proven that the effect of higher polymer concentration on compressive strength (Iyengar et al 2012;Naeini and Ghorbanalizadeh 2010;Failed 2010b) and shear strength (Liu et al 2011;Naeini and Mahdavi 2009) appears at higher curing time (> 2 days).…”

Section: Polymersmentioning

confidence: 99%

A comprehensive research in chemical consolidator/stabilizer agents on sand production control

Tabar¹,

Bagherzadeh²,

Shahrabadi³

et al. 2021

J Petrol Explor Prod Technol

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Sand or fine is a typical product in many processing of oil production from unconsolidated and weakly consolidated formations. High variation of in situ stress, fluid production rate above maximum sand-free rate, and water production are main primary sources of the sand production. Sand production can cause hazardous operational problems to the facilities, pipes, and wellbore. Hence, it is a significant problem that requires to be managed and studied. To minimize the operational impacts of particle migration, chemical consolidators/stabilizers can be utilized to alter surface properties of sand and formation particles. The decreasing zeta potential besides increasing the cohesion between sand and formation particles could result in controlled sand production. However, understanding the mechanism and application of chemical methods to alleviate sand production is not well-discussed. This study presents and discusses chemical consolidator/stabilizer agents, which may be applied for managing sand production in the petroleum industry. This was achieved through a comprehension review of the literature and the application of chemical consolidators/stabilizers in other fields such as bauxite residue (red mud and red sand) control, desert sand, mine reclamation, wind erosion control, unpaved road modification, and enhancement of water retention and soil infiltration properties that are similar to formation sand. Standard experimental methods in various fields, for performance analysis of chemical consolidator/stabilizer agents, are compared and summarized. The consolidation/stabilization mechanisms of various types of chemical consolidator/stabilizer agents are discussed and compared. This review potentially can be used to inhibit blind usage of chemicals and functions as a reference to additional research in sand production control in petroleum engineering. The results are appropriate for extending quantitative approaches for performance evaluation of sand consolidator/stabilizer agents.

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“…From the measured shear wave velocity, Gmax was calculated by equation (2). Figure 4 shows the comparison of Gmax of treated and untreated sand at three different initial relative densities.…”

Section: Maximum Shear Modulus Gmaxmentioning

confidence: 99%

“…In geotechnical engineering, polymers have been used as the nontraditional additives for the artificial stabilizations of soft ground, sand fixing effect, polymer grouting, and to compose artificial floor surfaces. Recent studies on the use of polymers in engineering area focused on reducing toxicity of conventional polymers, developing novel polymers by industrial wastes [2] and applying polyurethane resin to reduce seismic damage [3]. Likewise, interest in the use of polymers in geotechnical engineering have been increased recently; however, there is the lack of understanding in the role of polymers on the behaviour of soils.…”

Section: Introductionmentioning

confidence: 99%

Geotechnical characteristics of polystyrene treated sand

et al. 2019

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Many polymeric materials are recently used in geotechnical practice for enhancing the engineering properties of soils. Among the various polymers, this study aims at investigating the geotechnical properties of silica sand coated with polystyrene(PS), which is rarely studied in geotechnical engineering. The polystyrene coated sand was prepared by polymerizing styrene monomer on the surface of silanized sand with median diameter of 0.467 mm. Testing specimens were prepared at 3 different initial relative densities (30, 50 and 70%) by air pluviation. Comprehensive experiments, including one-dimensional compression test with bender elements and triaxial test, were performed to observe the change in geotechnical properties due to the coating of PS on sand surface. The results demonstrate that the adsorbed polymer plays different roles according to strain levels. At very small strain, the polymer on the sand surface may increase the interparticle contact area by applying additional adhesion force between soil particles, leading to an increase in Gmax. However, with an increase in strain level, the polymer will act as the lubricant between sand particles; therefore, the coated sand can show increased compression index and decreased friction angle.

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Evaluation and mechanism of anionic waterborne polyurethane dispersion for chemical sand stabilisation

Cited by 4 publications

References 30 publications

Occurrence Regularity of Silt–Clay Minerals in Wind Eroded Deserts of Northwest China

Occurrence Regularity of Silt–Clay Minerals in Wind Eroded Deserts of Northwest China

A comprehensive research in chemical consolidator/stabilizer agents on sand production control

Geotechnical characteristics of polystyrene treated sand

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