Pumping of Highway and Airfield Pavements: Technical Paper

Yoder, Eldon J

doi:10.5703/1288284313518

Cited by 4 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is seen that the plasticity index decreases as phosphogypsum content increases for the three soils, which are mainly due to a reduction in liquid limit. Previous studies on lime and cement treatment have shown similar effects on consistency limits of the treated soils as seen in Figure 9 taken from reference [1] and [2], which shows the effect of lime treatment on consistency limits of 13 clay soils, the effect of Portland cement treatment on Consistency limits of A-7-6 soil taken from Illinois State. It could be seen from these two figures that the liquid limit decreases, the plastic limit increases, and the plasticity index sharply decreases.…”

Section: Atterberg Limitssupporting

confidence: 65%

“…It has a major influence on the design and construction of roadway pavements. Many studies and researches proved that highways constructed over plastic soil suffered from a high degree of distresses on the pavement [1,2]. Expansive soil is widely spread in Jordan and also all over the world.…”

Section: Introductionmentioning

confidence: 99%

“…This is of great importance as the addition of phosphogypsum has no effect on plasticity of the soil [15]. There are two types of chemical reactions for lime soil stabilization: one of them is the lime-soil modification reaction, which occurs immediately within a few minutes to an hour, causing a reduction in plasticity, volume change, and increase in soil workability [1,2,9,14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Through compaction, the stiffness and strength properties of the soil are improved and the permeability reduced [19]. Compaction at moisture content near or slightly in excess of the optimum moisture content, pre-soaking with water (the soil flooded prior to construction of the pavement, causes the sub-grade to lose some of its swelling characteristics), and appropriate chemical or physical treatment, such as lime stabilization [1,2,5,14,20,21].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The effect of phosphogypsum on stabilizing clay soil and improving its properties for use as foundation soil

Maaitah

Banat

2021

J Met Mater Miner

View full text Add to dashboard Cite

Expansive soil covers large areas in a variety of regions in Jordan which is insufficient to meet the engineering specifications in construction. Phosphogypsum is considered to be the main by-product material which comes from phosphate rock deposits that is available in Jordan. The main purpose of this research is to study the effects of stabilization by phosphogypsum on expansive soil properties. Three Jordanian regions were chosen to represent the expansive soils, Irbid, Madaba, and Abu-Nusire city. Soils were mixed with phosphogypsum at different percentages by dry weight of soil. Some of the representative laboratory tests for swell properties were conducted: grain size distribution, plasticity limits, standard compaction test, swell pressure and others. Laboratory results showed a positive response in the engineering soil properties which were confirmed by the Jordanian specifications for the sub-grade soils which may be used in road and building constructions. A 20% to 30% of phosphogypsum by weight of dry soil was found suitable to improve the engineering soil properties, such as the decrease in clay content and changed in classification from A-7 and A-6 soils to A-6 and A-4 soils, respectively. Field tests on short sections of roadways treated with phosphogypsum under a low to medium sustained traffic are recommended.

show abstract

Section: Atterberg Limitssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of phosphogypsum on stabilizing clay soil and improving its properties for use as foundation soil

Maaitah

Banat

2021

J Met Mater Miner

View full text Add to dashboard Cite

show abstract

“…In particular, thanks to the camera, the pumping 31 up level of fine particles was visualized during the test, showing that the migration of fine particles was 32 not only due to the interpenetration of ballast particles and sub-soil, but also the pore water pressure that 33 al. 2011) and the pavement context (Yoder 1957, Van 1985, Alobaidi and Hoare 1994, 1998a, 48 1998b, 1999, Zhang 2004, Yuan et al 2007. By contrast, the interlayer has been identified and 49 characterized only recently (Calon et al 2010, Trinh et al 2011, Trinh 2011, Trinh et al 2012 2013, Duong et al 2013).…”

mentioning

confidence: 99%

Physical Model for Studying the Migration of Fine Particles in the Railway Substructure

Duong

Cui

Tang

et al. 2014

Geotechnical Testing Journal

View full text Add to dashboard Cite

To study the interlayer creation and the mud-pumping phenomena in the conventional French railway substructure, a physical model was developed with a 160-mm-thick ballast layer overlaying a 220-mm-thick artificial silt layer (mixture of crushed sand and kaolin), both layers being compacted in a transparent cylinder of a 550-mm-inner diameter. One positive pore water pressure sensor, three tensiometers, and three time domain reflectometer (TDR) sensors were installed around the ballast/silt interface allowing the evolution of pore water pressure (negative or positive) and volumetric water content to be monitored, respectively. A digital camera was installed allowing direct monitoring of different movements (ballast, ballast/subsoil interface, etc.). The effects of loading (monotonic and cyclic loadings) and degree of saturation of subsoil (w = 16 %, Sr = 55 %, and near-saturation state) were investigated. It was found that the development of pore water pressure in the subsoil is the key factor causing the migration of fine particles, hence, resulting in the creation of interlayer, as well as mud pumping. In particular, the camera exposed the pumping up level of fine particles during the test, showing that the migration of fine particles was not only a result of the interpenetration of ballast particles and subsoil, but also of the pore water pressure that pushed the fine particle upward. The quality of the recorded data showed that the physical model developed worked well and the test protocol adopted for studying the mechanisms of intermixing of ballast and subsoil and mud pumping was appropriate.

show abstract