Ten year follow-up study of airfoam-treated lightweight soil

Watabe, Yoichi; Saegusa, Hironao; Shinsha, Hiroshi; Tsuchida, Takashi

doi:10.1680/grim.2011.164.3.189

Cited by 15 publications

(10 citation statements)

References 5 publications

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“…Watabe et al (2011) report the results of a 10 year follow-up study to investigate the durability of air-foam-treated light-weight soil. They found that the properties of the material after 10 years were in excess of the design values and that the material had increased in strength over time.…”

Section: Creep and Ground Inclusionsmentioning

confidence: 99%

Addressing some current challenges in ground improvement

Mitchell

Kelly

2013

Proceedings of the Institution of Civil Engineers - Ground Impr

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Ground improvement will be critically important in future geotechnical practice to achieve reductions in quantities of material used, reduction in carbon footprint, prevention and mitigation of natural disasters, treatment and recycling of industrial wastes, remediation of polluted soils, development of brownfield sites and maintenance and rehabilitation of existing structures. Challenges exist in providing cost-effective sustainable ground improvement under current economic conditions. These issues are addressed under categories of reduce, reuse and recycle in the first part of the paper. Selection processes for ground improvement methodologies, improved analysis, knowledge of long-term performance and understanding of effects of variability are required to develop more efficient designs. These issues are addressed in the second part of the paper.

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Section: Creep and Ground Inclusionsmentioning

confidence: 99%

Addressing some current challenges in ground improvement

Mitchell

Kelly

2013

Proceedings of the Institution of Civil Engineers - Ground Impr

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“…Bubbles constituting foam are entrapped in the viscous slurry till setting and subsequent hardening, thus increasing porosity and decreasing bulk density; this also implies that compaction has not to be applied, which together with self-levelling properties related to the high flowability leads to a reduction of construction time. Due to low bulk density, this material can prove to be useful for construction purposes on soft soils, as shown by some authors [12][13][14]. However, chemo-mechanical properties of lightweight cemented soils have not been extensively investigated [15][16][17].…”

Section: Effects Of Cement and Foam Addition On Chemo-mechanical Behamentioning

confidence: 99%

Effects of cement and foam addition on chemo-mechanical behaviour of lightweight cemented soil (LWCS)

et al. 2019

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One of the main problems encountered in civil engineering is the management of large amounts of excavated soil, especially when the mechanical properties of this soil are not suitable for its reuse as a construction material. However, the excavated soil could represent a resource if appropriately improved. A suitable solution is the addition of cement and foam to produce lightweight cemented soils (LWCS). In this paper, an insight into the influence of foam on chemo-mineralogical and microstructural features of soil-cement-water system is presented. Time dependent mineralogical and microstructural changes have been monitored by means of X-Ray Diffraction, Thermo-gravimetric analysis and Mercury Intrusion Porosimetry. The present study shows that addition of foam does not alter the chemo-physical evolution of the soil-cement-water system. Large voids are present in the samples as footprint of air bubbles upon mixing, thus increasing porosity. Macroscopic behaviour of treated samples has been investigated by direct shear and oedometric tests. Chemo-physical evolution induced by cement addition is the major responsible for mechanical improvement showed by treated samples. Porosity of samples induced by foam addition plays a key role in the mechanical response of LWCS, inducing a transition of stress-strain behaviour from brittle and dilative to ductile and contractive as a function of increasing foam content.

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“…xung quanh vùng này [22][23][24]. Sau một thời gian, khi vật liệu nạo vét đủ cứng, họ cải tạo các bể chứa này thành các đường băng trong sân bay.…”

Section: Thảo Luậnunclassified

Đề Xuất Các Giải Pháp Giảm Thiểu Tác Động Do Đổ Thải Bùn Cát Nạo Vét Ở Vùng Ven Biển Hải Phòng

Vinh¹,

Hải²,

Lan³

2019

JMST

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Located in the estuary region of the Red - Thai Binh river system, in which the estuarine turbidity maxima occur, the deposition of navigation in waterways to Hai Phong ports is always an urgent problem that needs to be solved. At the present time, it is not easy to use dredged sediment for landfilling or other purposes. Moreover, it is also difficult to dispose of them on the land because of requiring the design and construction of dikes, requiring compaction and drainage of dumped materials. Therefore, disposing of materials at dumping sites in Hai Phong open waters is still an alternative for considering. However, the suspended sediment from the dumping sites can cause influences on the marine environment and ecosystems. Based on the characteristics of natural conditions, socio-economy and ecological environment in Hai Phong coastal areas as well as results of the modeling application (Delft3D model), this paper gives some proposals for appropriate solutions to reduce influences of sediment dumping activities in the Hai Phong open waters. They are: (1) Planning a land for reclamation of dumped materials, (2) Research on the strategies to use dredged sediments as a resource, (3) Finding a best method of dumping, (4) Considering tidal current for daily dumping, (5) Choosing disposal time during neap tide, (6) Restricting disposal in case winds come from SW and S, (7) Reducing time and the number of dumping, increasing amount of sediments in each dumping, (8) Applying technologies in disposal monitoring, (9) Regularly monitoring the environment at the dumping sites and adjacent areas.

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Ten year follow-up study of airfoam-treated lightweight soil

Cited by 15 publications

References 5 publications

Addressing some current challenges in ground improvement

Addressing some current challenges in ground improvement

Effects of cement and foam addition on chemo-mechanical behaviour of lightweight cemented soil (LWCS)

Đề Xuất Các Giải Pháp Giảm Thiểu Tác Động Do Đổ Thải Bùn Cát Nạo Vét Ở Vùng Ven Biển Hải Phòng

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