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Anh Minh Tang

Other affiliations: ParisTech, Tongji University, IFSTTAR  ...read more
Bio: Anh Minh Tang is an academic researcher from École des ponts ParisTech. The author has contributed to research in topics: Water content & Oedometer test. The author has an hindex of 40, co-authored 213 publications receiving 5461 citations. Previous affiliations of Anh Minh Tang include ParisTech & Tongji University.


Papers
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Journal ArticleDOI
30 Oct 2011-Geoderma
TL;DR: In this paper, the effect of W-D cycles on the geometric characteristics of crack patterns was analyzed by image processing, and the results showed that the observed cracks were significantly influenced by the applied WD cycles, but this influence was reduced after the third cycle.

253 citations

Journal ArticleDOI
TL;DR: In this paper, the problems related to unsaturated soils are frequently encountered in geotechnical or environmental engineering works in most cases, for simplicity, one can study the problems by considering the suc...
Abstract: Problems related to unsaturated soils are frequently encountered in geotechnical or environmental engineering works. In most cases, for simplicity, one can study the problems by considering the suc...

233 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the desiccation cracking behavior at three temperatures (22, 60 and 105°C) and found that the initial critical water content (wIC), which corresponds to the initiation of desiliccation crack, increases with temperature rise, and the ratio RSC increases with decreasing water content and then keeps almost constant when the water content becomes lower than the critical Water Content (wFC).

215 citations

Journal ArticleDOI
TL;DR: In this paper, a mixture of the MX80 bentonite and the Callovo-Oxfordian (COx) claystone was investigated by carrying out a series of experiments including determination of the swelling pressure of compacted samples by constant volume method, pre-swell method, zero swell method and swell-consolidation method.

208 citations

Journal ArticleDOI
TL;DR: In this paper, a thermal probe based on the hot wire method was used to measure the thermal conductivity of compacted bentonite specimens and the experimental results were analyzed to observe the effects of various factors (i.e. dry density, water content, hysteresis, degree of saturation and volumetric fraction of soil constituents).

197 citations


Cited by
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TL;DR: In this paper, the authors analyze how earthquakes trigger landslides and highlight research gaps, and suggest pathways toward a more complete understanding of the seismic effects on the Earth's surface, highlighting research gaps.
Abstract: Large earthquakes initiate chains of surface processes that last much longer than the brief moments of strong shaking. Most moderate‐ and large‐magnitude earthquakes trigger landslides, ranging from small failures in the soil cover to massive, devastating rock avalanches. Some landslides dam rivers and impound lakes, which can collapse days to centuries later, and flood mountain valleys for hundreds of kilometers downstream. Landslide deposits on slopes can remobilize during heavy rainfall and evolve into debris flows. Cracks and fractures can form and widen on mountain crests and flanks, promoting increased frequency of landslides that lasts for decades. More gradual impacts involve the flushing of excess debris downstream by rivers, which can generate bank erosion and floodplain accretion as well as channel avulsions that affect flooding frequency, settlements, ecosystems, and infrastructure. Ultimately, earthquake sequences and their geomorphic consequences alter mountain landscapes over both human and geologic time scales. Two recent events have attracted intense research into earthquake‐induced landslides and their consequences: the magnitude M 7.6 Chi‐Chi, Taiwan earthquake of 1999, and the M 7.9 Wenchuan, China earthquake of 2008. Using data and insights from these and several other earthquakes, we analyze how such events initiate processes that change mountain landscapes, highlight research gaps, and suggest pathways toward a more complete understanding of the seismic effects on the Earth's surface.

424 citations

Journal ArticleDOI
TL;DR: In this paper, the authors consider the effects of new phenomena and new variables on soil behavior, such as high temperatures, associated with the problem of storage and disposal of high-level radioactive waste; and low temperatures in problems of freezing ground.
Abstract: The range of problems that geotechnical engineers must face is increasing in complexity and scope. Often, complexity arises from the interaction between the soil and the environment – the topic of this lecture. To deal with this type of problem, the classical soil mechanics formulation is progressively generalised in order to incorporate the effects of new phenomena and new variables on soil behaviour. Recent advances in unsaturated soil mechanics are presented first: it is shown that they provide a consistent framework for understanding the engineering behaviour of unsaturated soils, and the effects of suction and moisture changes. Building on those developments, soil behaviour is further explored by considering thermal effects for two opposite cases: high temperatures, associated with the problem of storage and disposal of high-level radioactive waste; and low temperatures in problems of freezing ground. Finally, the lecture examines some issues related to chemical effects on soils and rocks, focusing i...

340 citations

Journal ArticleDOI
TL;DR: Bentonite and bentonite/sand mixtures are selected primarily because of their low hydraulic permeability in a saturated state, which ensures that diffusion will be the dominant transport mechanism in the barrier as mentioned in this paper.
Abstract: Geological disposal is the preferred option for the final storage of high-level nuclear waste and spent nuclear fuel in most countries. The selected host rock may be different in individual national programs for radioactive-waste management and the engineered barrier systems that protect and isolate the waste may also differ, but almost all programs are considering an engineered barrier. Clay is used as a buffer that surrounds and protects the individual waste packages and/or as tunnel seal that seals off the disposal galleries from the shafts leading to the surface. Bentonite and bentonite/sand mixtures are selected primarily because of their low hydraulic permeability in a saturated state. This ensures that diffusion will be the dominant transport mechanism in the barrier. Another key advantage is the swelling pressure, which ensures a self-sealing ability and closes gaps in the installed barrier and the excavation-damaged zone around the emplacement tunnels. Bentonite is a natural geological material that has been stable over timescales of millions of years and this is important as the barriers need to retain their properties for up to 106 y. In order to be able to license a final repository for high-level radioactive waste, a solid understanding of how the barriers evolve with time is needed. This understanding is based on scientific knowledge about the processes and boundary conditions acting on the barriers in the repository. These are often divided into thermal, hydraulic, mechanical, and (bio)chemical processes. Examples of areas that need to be evaluated are the evolution of temperature in the repository during the early stage due to the decay heat in the waste, re-saturation of the bentonite blocks installed, build-up of swelling pressure on the containers and the surrounding rock, and degradation of the montmorillonite component in the bentonite. Another important area of development is the engineering aspects: how can the barriers be manufactured, subjected to quality control, and installed? Geological disposal programs for radioactive waste have generated a large body of information on the safety-relevant properties of clays used as engineered barriers. The major relevant findings of the past 35 y are reviewed here.

321 citations

Journal ArticleDOI
TL;DR: Results from this work suggest that plastic contamination can alter the water cycle in soils, which may exacerbate soil water shortages and affect the vertical transport of pollutants.

299 citations

Journal ArticleDOI
Chao-Sheng Tang1, Bin Shi1, Chun Liu1, Li-Zheng Zhao1, Baojun Wang1 
TL;DR: In this paper, the authors investigated the effects of temperature, thickness of soil layer, wetting and drying cycles and soil types on geometrical structure of surface shrinkage cracks in clayey soils.

292 citations