Relevant bibliographies by topics / Compactive effort

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  1. Journal articles
  2. Dissertations / Theses
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  4. Book chapters
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Academic literature on the topic 'Compactive effort'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Compactive effort"

1

Eberemu, Adrian O. "Desiccation Induced Shrinkage of Compacted Tropical Clay Treated with Rice Husk Ash." International Journal of Engineering Research in Africa 6 (November 2011): 45–64. http://dx.doi.org/10.4028/www.scientific.net/jera.6.45.

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Desiccation studies are an integral part of material selection for waste containment systems. Laboratory studies on compacted tropical clay (with illite as the dominant clay mineral sourced from an excavation site) treated with up to 16% rice husk ash (RHA); an agro-industrial waste to evaluate its desiccation induced shrinkage and hence its suitability as a cover material in waste containment systems were carried out. Soil-RHA mixtures were compacted using three compactive efforts at -2, 0, 2 and 4% of optimum moisture content (OMC). Compacted samples, extruded from the compaction mould were allowed to air dry in the laboratory for a 30 day period after which they were subjected to two cycles of wetting and drying. Results show that changes in mass and volumetric shrinkage strain (VSS) were large within the first five days of drying and were affected by the compactive effort. VSS increased with higher moulding water content, water content relative to optimum and RHA treatments. VSS were affected by the compactive effort. Acceptable compaction planes were obtained for up to 12% RHA treatment. After two cycles of wetting and drying, it was observed that the rate of capillary rise within the compacted soil increased with lower compactive effort and higher rice husk ash treatment. Lower amount of cracking was observed in soil specimen with higher rice husk ash treatment and higher cracking in soils with lower rice husk ash content. Increased compactive effort reduced the effect of swelling during wetting; showing the suitability of the material as a cover in municipal waste containment facility and beneficial reuse of this agro waste product.
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2

Cross, Stephen A. "Determination of Superpave® Gyratory Compactor Design Compactive Effort for Cold In-Place Recycled Mixtures." Transportation Research Record: Journal of the Transportation Research Board 1819, no. 1 (January 2003): 152–60. http://dx.doi.org/10.3141/1819b-19.

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Cold in-place recycling (CIR) is a viable pavement rehabilitation technique that recycles 100% of the reclaimed asphalt pavement (RAP) in place, without the addition of heat. One of the barriers to the use of CIR has been the lack of a suitable mixture design procedure. Researchers at the University of Rhode Island have shown that Superpave® mix design technology is applicable to CIR mixtures if the mix design compactive effort [number of compaction revolutions or gyrations ( Ndesign)] can be established for the Superpave gyratory compactor (SGC). The two objectives of the present project were to determine the mix design compactive effort ( Ndesign) with the SGC required to match the field densities of CIR mixtures and to evaluate the effect of sample compaction before and after breaking of the emulsion on the Ndesign compactive effort. RAPs from seven CIR projects were obtained, as was asphalt emulsion from each project. Samples were compacted with the SGC by use of the mix water and emulsion content from the field. The change in density with the number of compaction revolutions was monitored, and the Ndesign required to match the field density was determined. The effects of RAP physical properties, such as RAP gradation, the percentage of flat and elongated particles, aggregate gradation, and angularity, on Ndesign were evaluated. RAP shape, as measured by the percentage of flaky pieces, was found to influence the compacted field density. The Ndesign compactive effort for CIR mix design was also established.
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3

Mazumdar, Mayajit, and S. K. Rao. "Effect of comparative efforts on sand–asphalt–sulphur mixes." Canadian Journal of Civil Engineering 12, no. 4 (December 1, 1985): 916–19. http://dx.doi.org/10.1139/l85-104.

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The investigation studies the effect that varying the compactive effort has on the Marshall test properties of sand–asphalt–sulphur mixes (S–A–S mixes). An S–A–S mix containing a poorly graded river sand has been chosen for study, the proportions of sand, asphalt, and sulphur being 85:5:10 by weight.Another aspect of this study is to examine the effect of fly ash fines, an industrial waste, on S–A–S mixes. The resulting mix is named S–A–FA–S (sand – asphalt – fly ash – sulphur) and has a percentage composition of 80:5:5:10 by weight.It has been observed that the compactive effort has a definite effect on the Marshall test properties of S–A–S and S–A–FA–S mixes. In both cases, the stability rises initially and then falls with increasing compaction. S–A–FA–S mixes give higher stabilities and lesser air void values than S–A–S mixes at a particular level of compaction. It is concluded that 10 blows of compaction is optimum for S–A–S as well as S–A–FA–S mixes, as the beneficial effect after 10 blows is only marginal.
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4

Edeh, Joseph E., Adrian O. Eberemu, and James Mzuaor Aburabul. "Effect of Compactive Efforts on the Strength Properties of Groundnut Shell Ash Stabilized Reclaimed Asphalt Pavement." Advanced Materials Research 824 (September 2013): 12–20. http://dx.doi.org/10.4028/www.scientific.net/amr.824.12.

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Large quantities of groundnut shell ash (GSA) are generated from the combustion of groundnut shell, disposed in large quantities on production sites while large volume of reclaimed asphalt pavements (RAP) aggregates are also generated during pavement rehabilitation and reconstruction and disposed along road alignments. This paper presents results of the laboratory evaluation of the effect of compactive efforts on the strength properties of GSA stabilized RAP with a view to determining its suitability as highway pavement material in pavement constructions. The RAP-GSA mixtures were subjected to Reduced British Standard light, RBSL (reduced Proctor); British Standard light, BSL (standard Proctor); West African Standard, WAS and British Standard heavy, BSH (modified Proctor) compactive efforts to determine the compaction characteristics, California bearing ratio (CBR), durability and water absorption characteristics. Test results show that the properties of RAP improved with GSA treatment. The particle grading improved from 99.13 % coarse aggregate and 0.87 % fines, with AASHTO classification of A-1-b for 100 % RAP, and 9.08 % coarse aggregate and 90.92 % fines, with AASHTO classification of A-4 for 100 % GSA to 15.6691.72 % coarse aggregate and 8.2884.32 % fines, with AASHTO classification in the range A-4 (silty soil) to A-1-a (granular materials), for the various RAP-GSA mixes. Maximum dry density (MDD) decreased while the optimum moisture content (OMC) increased with higher GSA content in the RAP + GSA mixes and with decreased compactive effort from BSH to RBSL. Optimum CBR values of 35.1% (unsoaked) and 44.1% (soaked) recorded for 90% RAP + 10% GSA mix achieved with BSH compactive effort, satisfied the durability requirements with insignificant expansion and water absorption and can be used as subbase material in flexible pavements construction. This research provides the results of evaluation of the effect of compactive efforts on the strength properties of GSA stabilized RAP as highway construction material, as it is based on CBR determination. Further work may be encouraged to assess resilient modulus of this material under cyclic load.
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5

Rotimi, Oluremi Johnson, Bamigboye Gideon Olukunle, Afolayan Olaniyi Diran, B. Iyanda Olayinka, and A. Bello Usman. "Strength Enhancement Potential of Spent Calcium Carbide on Fine Grained Lateritic Soil." Journal of Solid Waste Technology and Management 47, no. 1 (February 1, 2021): 156–63. http://dx.doi.org/10.5276/jswtm/2021.156.

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Effect of spent calcium carbide (SCC) on index and strength properties of lateritic soil at differ- ent compactive efforts was assessed in this study as potential means of improving the geotechnical properties of the subsoil as well as disposing of SCC as waste. SCC was admixed with the soil using 0 to 10 % by dry weight of soil at an incremental rate of 2%. The following tests were carried out on the samples: specific gravity, Atterberg limit, particle size distribution, compaction, and California bearing ratio (CBR). Compaction and California Bearing Ratio (CBR) tests were carried out using British Standard light (BSL), West African Standard (WAS), and British Standard heavy (BSH) on both the natural and stabilized soil samples. From the investigation, atterberg limits show a reduction in the plasticity index with increasing content of SCC. The maximum dry density of the soil decreased with increasing SCC content and increased with an increase in compactive energies (BSL<WAS<BSH), while and optimum moisture content (OMC) increased correspondingly. Also, soaked and unsoaked CBR values of the stabilized lateritic soil showed an increase in strength with higher compactive effort, and SCC content up to 4% SCC addition and after that decreased in value. Based on these results, spent calcium carbide improved the geotechnical properties of this lateritic soil, and 4% SCC is recommended for its stabilization as subgrade material for pavement construction, thereby serving as an effective method of disposing SCC towards promoting a green and sustainable environment.
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6

Oke, J. A., N. O. Obaji, and K. J. Osinubi. "Oil palm empty fruit bunch ash stabilized laterite as a fill material for low-volume pavement." Nigerian Journal of Technology 39, no. 3 (September 16, 2020): 721–31. http://dx.doi.org/10.4314/njt.v39i3.10.

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A reddish-brown laterite was treated with up to 14 % oil palm empty fruit bunch ash (EFBA) by dry weight of soil and compacted with the British Standard light, BSL (or Standard Proctor) compactive effort. Index, compaction, strength and durability tests as well as microanalysis of the natural and stabilized specimens were carried out. The index, compaction characteristics (maximum dry density, MDD and optimum moisture content, OMC) and strength properties (California bearing ratio, CBR and unconfined compressive strength, UCS) were improved with higher EFBA treatment. Peak un-soaked and soaked CBR values of 70.0 and 45.0 %, as well as peak UCS strengths of 253.0, 462.0 and 577 kN/m2 at 7, 14 and 28 days curing were recorded at 8 % EFBA content. Based on the CBR specification specified in the Nigerian General Specifications, the laterite optimally treated with 8 % EFBA compacted with the BSL compactive effort can be used as a fill material in the construction of low-volume traffic pavement. The benefit of the EFBA application is primarily the reduction of the adverse environmental impact of the oil palm empty fruit bunch waste. Keywords: California bearing ratio, durability, laterite, oil palm empty fruit bunch ash, microanalysis, stabilization
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7

Ogundipe, Olumide Moses, Jonathan Segun Adekanmi, Olufunke Olanike Akinkurolere, and Peter Olu Ale. "Effect of Compactive Efforts on Strength of Laterites Stabilized with Sawdust Ash." Civil Engineering Journal 5, no. 11 (November 1, 2019): 2502–14. http://dx.doi.org/10.28991/cej-2019-03091428.

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This study investigates the effects of different compactive efforts on the strength of laterites stabilized with sawdust ash (SDA). Laterites in the categories of A-7-5 and A-7-6 were considered because they are not suitable in the natural states as subgrade materials. The geotechnical properties of the laterites in their natural states were determined. The sawdust was burnt and sieved through 600micron. The sawdust ash (at 2%, 4%, 6%, 8% and 10%) was added to the laterites and the atterberg limits were determined, while the California bearing ratio and Unconfined compression test were determined using three compactive efforts (596, 1192 and 2682KN-m/m3).It was generally observed that the maximum dry densities of the natural and stabilised laterites increase with increase in the compactive efforts, while the optimum moisture contents reduce. The plasticity indices of the laterites increased with the addition of SDA. The optimum values of the MDDs (2006 and 1878 kg/m3) were observed at 4% and 6% SDA of 2682 kN-m/m3 compactive effort for samples A and B, respectively. The soaked and unsoaked CBR values of the soils at natural state are 4.89 and 16.33%, and 3.4 and 5.62% for samples A and B, respectively. The results indicate that the higher the compactive efforts, the higher the CBR values of the two samples. Increase in SDA contents of soil samples A and B showed a non-predictable trend on their CBR values. The Unconfined Compressive Strength values at natural and treated states fell below the requirements. Generally, it was found that the use of sawdust ash alone as stabilizer was not effective. Therefore, it was concluded that future studies should consider the use of the sawdust ash in combination with cement or lime.
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Ochepo, J. "Effect of Rice Husk Ash on the Hydraulic Conductivity and Unconfined Compressive Strength of Compacted Bentonite Enhanced Waste Foundry Sand." LAUTECH Journal of Civil and Environmental Studies 5, no. 1 (September 27, 2020): 85–96. http://dx.doi.org/10.36108/laujoces/0202/50(0190).

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A laboratory study of the hydraulic conductivity, (HC), and unconfined compressive strength, (UCS), of compacted bentonite enhanced waste foundry sand (BEWFS) treated with rice husk ash, (RHA) for possible use as liner material is presented. The bentonite enhanced waste foundry sand, BEWFS, was obtained by blending waste foundry sand (WFS) with 12% bentonite by weight of the WFS and mixing the resulting blend thoroughly to obtain a homogenous mix. RHA was added to the BEWFS in increment of 2, 4, 6, 8 and 10% respectively of the dry weight of the BEWFS. The entire blended material was thoroughly mix together to obtain sample with different content of RHA. Index tests, compaction, UCS and HC tests were carried out on the blended materials to determine the effect of RHA on the behaviour of the BEWFS. HC as well as UCS of the materials were study using three compactive efforts of British standard light, (BSLC), West African standard, (WASC) and British standard heavy, (BSHC) compactive efforts respectively. The results obtained show that addition of RHA to BEWFS affected the index properties of the material marginally where the liquid limit increased to 35 from 32 %, plastic limit reduced from 12 to 11% and plasticity index increased from 20 to 25% respectively. The HC of the material was found to increase slightly from 6.28 x 10-08 to 3.90 x 10-08, 2.64 x 10-09 to 2.07 x 10-08 and 8.55 x 10-11 to 1.83 x 10-10 m/s with addition of up to 10 % RHA content and compacted at BSLC, WASC and BSHC respectively. Similarly, the UCS was found to increase to peak values of 177.22, 288.48 and 454.26 kN/m2 at same RHA content and compactive efforts. The implication of this result is that the addition of RHA up to 10% to BEWFS slightly increase the HC but does not compromise it while the strength gain in term of UCS can be said to compensate for the slight lost in HC. It is recommended that BEWFS treated with between 8 to 10% RHA content and compacted at BSHC compactive effort can be applied as liner in engineered waste containment system.
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9

Yusuf, Umar Sa’eed, Matawal Danladi Slim, and Elinwa Augustine Uchechukwu. "Hydraulic Conductivity of Compacted Laterite Treated with Iron Ore Tailings." Advances in Civil Engineering 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/4275736.

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The objective of this study was to investigate the effect of iron ore tailings (IOT) on hydraulic conductivity of compacted laterite. The IOT conforms to ASTM C 618-15 Type F designations. In the present study, soil was admixed with 0–20% IOT and compacted at moulding water content ranging from 10 to 25% using four types of compactive efforts. Hydraulic conductivities of the compacted soil-IOT mixtures were determined using deionized water and municipal solid waste leachate as the permeant fluids, respectively. Deionized water was the reference permeant fluid. Results of this study showed that hydraulic conductivity decreased with increase in IOT content as a result of improvement in mechanical properties of the soil. Permeation of the soil-IOT mixtures with leachate caused the hydraulic conductivity to drop to less than 1 × 10−9 m/s especially at higher compactive efforts. Also, bioclogging of the soil pores due to accumulation of biomass from bacteria and yeast present in the leachate tends to significantly reduce the hydraulic conductivity. From an economic point of view, it has been found from the results of this study that soil specimens treated with up to 20% IOT and compacted at the British Standard Light (BSL) compactive effort met the maximum regulatory hydraulic conductivity of less than or equal to 1 × 10−9 m/s for hydraulic barrier system.
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Eberemu, Adrian O., Agapitus A. Amadi, and Joseph E. Edeh. "Hydraulic Conductivity of Compacted Tropical Clay Treated with Rice Husk Ash." Advanced Materials Research 367 (October 2011): 63–71. http://dx.doi.org/10.4028/www.scientific.net/amr.367.63.

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Laboratory study on compacted tropical clay treated with up to 16% rice husk ash (RHA), an agro-industrial waste; to evaluate its hydraulic properties and hence its suitability in waste containment systems was carried out. Soil-RHA mixtures were compacted using standard Proctor, West African Standard and modified Proctor efforts at-2, 0, 2 and 4% of optimum moisture content (OMC). Compacted samples were permeated and the hydraulic behaviour of the material was examined considering the effects of moulding water content, water content relative to optimum, dry density and RHA contents. Results showed decreasing hydraulic conductivity with increasing moulding water content and compactive efforts; it also varied greatly between the dry and wet side of optimum decreasing towards the wet side. Hydraulic conductivity generally decreased with increased dry density for all effort. Hydraulic conductivity increased with rice husk ash treatment at the OMC; but were within recommended values of 1 x 10-7 cm/s for up to 8% rice husk ash treatment irrespective of the compactive effort used. This shows the suitability of the material as a hydraulic barrier in waste containment systems for up to 8% rice husk ash treatment and beneficial reuse of this agro-industrial waste product.
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Dissertations / Theses on the topic "Compactive effort"

1

Kayahan, Ahmet. "Compressibility Of Various Coarse-grained Fill Materials In Dry And Wet Loading Conditions In Oedometer Test." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1052539/index.pdf.

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The use of coarse-grained fill materials has grown significantly in recent years especially on account of their use in dams and transportation networks. This study investigates compressibility of various coarse-grained fill materials in dry and wet loading conditions in oedometer test. Four materials were used in the experiments, which falls into GP, GW, GM and GC categories respectively. GP material is a weathered rock obtained from Eymir Lake region. This material was chosen especially to be able to investigate degradation and particle breakage due to compaction and compression. GW, GM and GC materials were obtained by using the material called &lsquo
bypass&rsquo
which is a fill material used in the construction of metro of Eryaman. Using these four materials, large-scale double oedometer tests were carried out to investigate compressibility in both dry and wet conditions. The double oedometer testing technique is used to investigate the effect of soaking on compressibility behaviour of compacted fill materials. Various compactive efforts were used in the compaction stage to investigate the effect of compactive effort on compressibility and degradation of the four gravelly materials. Gradations of the post-test samples were obtained and particle breakage due to compaction using various compactive efforts and particle breakage due to compression were determined. It is found that amount of compression does not necessarily depend on the dry density of the material and fine fraction is also a dominating property regarding the compressibility in coarse-grained fill materials. The vertical strains induced by soaking are on the order of 12% - 20% of the compression measured in dry loading case for the well-graded coarse-grained fill materials tested. Besides, there is significant particle breakage in the compaction process and no further particle breakage in the oedometer test for GP material.
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2

Hornbeck, Nicholas C. "Effect of compaction effort on Superpave surface course materials." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5592.

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Thesis (M.S.)--West Virginia University, 2008.
Title from document title page. Document formatted into pages; contains viii, 73 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 52-54).
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3

Adamah, Cornelius. "Effect of compaction effort on SuperPave base course materials." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10822.

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Thesis (M.S.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains viii, 79 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 52-54).
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4

El-Ali, Mohammad Abdullah 1958. "Effect of variations in compaction on asphaltic concrete." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276662.

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In this report the influence of several variables including asphalt content, mixing temperature, compaction temperature and compaction energy on void content, voids-in-the-mineral-aggregate (VMA), density and stability of asphaltic concrete mixtures was established. Straight lines were obtained on double logarithmic paper for each asphalt content when the logarithm of Marshall stability values as ordinate were plotted versus the logarithm of the corresponding number of blows of a Marshall compactor as the abscissa. The straight lines were very nearly parallel and therefore, it was possible to develop a single empirical formula expressing the relationship between stability at any compactive effort, within the range of 20 to 110 blows per face, in terms of the standard stability at 75 blows per face of specimen. Results indicate that void content, VMA, density and stability were significantly affected by compaction temperature, asphalt content, compactive effort and mixing temperature.
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5

Lemaire, Charles-Éric. "Estimation des efforts de contact cylindre / matériau d'un compacteur vibrant." Nantes, 2005. http://www.theses.fr/2005NANT2135.

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Le compactage des routes est une phase majeure de la construction des routes. Les efforts de contact caractérisent l'action du compacteur, leur estimation est nécessaire à l'amélioration du compactage. La mesure des efforts de contact n'est pas possible, ils sont estimés grâce au modèle dynamique du compacteur. La modélisation revient à considérer le compacteur comme un robot manipulateur. Cette approche a été enrichie par le formalisme mixte eulerien lagrangien qui donne un modèle plus simple. La méthode d'identification retenue est celle des moindres carrés pondérés. Une attention particulière a été portée à la description complète de cette méthode. La partie expérimentale constitue une partie majeure du travail et s'articule autour de trois axes : - Instrumentation d'un compacteur, - Définition et mise en place des essais, - Intégration et validation de la méthode sur un chantier. Pour la première fois le torseur des efforts de contact d'un compacteur a été estimé sur un chantier réel.
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6

Obousy, Richard K. Cleaver Gerald B. "Investigation into compactifed dimensions Casimir energies and phenomenological aspects /." Waco, Tex. : Baylor University, 2008. http://hdl.handle.net/2104/5261.

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7

Karlstrand, Nils, and Johan Neander. "After-compaction effect on the stiffness modulus of laboratory made samples." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97217.

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The report is written in research purpose for the Swedish National Road and Transport Research Institute (VTI). The aim has been to find out and to determine after-compaction effect on the stiffness modulus of laboratory made samples with different void content and at various temperatures. With the stiffness modulus the shear modulus can be calculated. With the shear modulus a road structure’s deformation in its different layers can be calculated. The work began with the choice of asphalt mixture (ABb16 160/220) with 5% binder content. This was compacted to sample bodies. These samples were analyzed with a number of methods from FAS (the association for asphalt pavements in Sweden). The results from these tests show among other things bulk density, void content and stiffness modulus. These results have afterwards been analyzed through different calculations developed by VTI. From the results we draw the conclusion that there is a clear connection between void and deformation, i.e. a higher void content gives a bigger deformation because of the low stiffness modulus. What happens is that after-compaction leads to a reduced void content which gives a higher stiffness modulus which gives an asphalt pavement that is more resistant against deformations. If the asphalt mixture has a void content of 5% you get a deformation during the first years that is 20% bigger than at a void content of 2% at 10°C. Is the void content 7% the deformation becomes 40% bigger that with 2% according to this study.
Rapporten är skriven i forskningssyfte för Statens väg och transportforskningsinstitut (VTI). Med syftet att ta reda på och klarlägga efterpackningens effekt på styvhetsmodulen hos laboratorietillverkade provkroppar med olika hålrum och vid olika temperaturer. Med hjälp av styvhetsmodulen kan skjuvmodulen räknas fram, under förutsättning att materialet är elastiskt, som man direkt kan härleda till en väg konstruktions deformation i de olika lagren. Arbetet började med val av asfaltmassa (ABb16 160/220) med en 5 % bindehalt, som sedan packades till provkroppar. Dessa provkroppar analyserades med ett antal metoder från FAS´(Föreningen för asfaltbeläggningar i Sverige). Resultatet från dessa metoder visar bland annat kompakt- och skrymdensitet, hålrumshalt och styvhetsmodul. Dessa resultat har sedan analyserats genom olika beräkningar framtagna av VTI. Från dessa resultat drar vi slutsatsen att det finns ett klart samband mellan hålrum och deformation (efterpackning), då en högre hålrumshalt ger en större deformation på grund av den låga styvhetsmodulen. Vad som sker är att efterpackningen leder till en minskad hålrumshalt vilket ger en högre styvhetsmodul vilket i sin tur ger en asfaltbeläggning som är mer motståndskraftig mot deformationer. Packas bindlagret till en hålrumshalt på 5 % får man en deformation under de första åren som är 20 % större än vid en hålrumshalt på 2 %, vid 10ºC. Är hålrumshalten 7 % blir deformationen istället 40 % större än vid 2 % enligt denna undersökning.
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8

Levina, Marina. "The effect of ultrasonic vibration on the compaction of pharmaceutical powders." Thesis, Liverpool John Moores University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521741.

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Zughaer, Hussien Jasim. "The effect of high strain deformation on the compaction of metal powders." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277591.

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Rajkumar, Arthi D. "The effect of roller compaction and tableting stresses on pharmaceutical tablet performance." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/21418/.

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Books on the topic "Compactive effort"

1

Conlin, Timothy Shaun Stafford. Soil compaction studies. Victoria, B.C: Canadian Forest Service, 1996.

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Douglas, J. T. Effect of wheel-induced compaction on grass yield and nitrogen uptake, 1988. (Penicuik): Scottish Centre of Agricultural Engineering, 1993.

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3

International Horticultural Congress (22nd 1986 Davis, Calif.). Controlled traffic cropping systems for management of soil compaction: 22nd International Horticultural Congress, Davis, California, USA, August 16, 1986. Edited by Orzolek M. D. Wageningen, Netherlands: ISHS, Commission Engineering, 1987.

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4

W, Carr William. Nutritional and soil compaction aspects of establishing forest cover on winter landings in the Fort St. James area. Victoria, B.C: Canadian Forestry Service, 1988.

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5

Damme, Laird Van. The effect of microsite compaction on direct seeding success of jack pine and black spruce in Northwestern Ontario. [Ontario]: Forest Resource Development Agreement, 1988.

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6

Holmstrom, Delmar. Effect of rolling on soil compaction and blueberry yields. 1993.

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Floch, Rick F. Shovel logging and soil compaction: A case study. 1988.

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Swearingen, Kurt A. Competitive relations for soil water in an experiment of soil compaction and organic residues in a young ponderosa pine-mixed shrub community. 1999.

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9

Thomasson, James E. Effects of tillage-induced soil compaction on carrot seedlings emergence and yield. 1988.

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Thomasson, James E. Effects of tillage-induced soil compaction on carrot seedlings emergence and yield. 1988.

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Book chapters on the topic "Compactive effort"

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Trezos, Konstantinos G., Ioannis P. Sfikas, Myron S. Palmos, and Ellas K. Sotiropoulou. "Top-Bar Effect in Self-Compacting Concrete Elements." In Design, Production and Placement of Self-Consolidating Concrete, 355–66. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-9664-7_30.

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Krishnan, Gopika, and Greeshma Subhash. "Effect of GGBS on Self-compacting Recycled Aggregate Concrete." In Lecture Notes in Civil Engineering, 165–73. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-26365-2_16.

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Perry, Chase R., and William M. Carty. "Effect of Plasticizer on Compaction Behavior and Springback Defects." In Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 20, Issue 2, 51–63. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470294543.ch5.

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Schulz, Brett M., William M. Carty, and Nikalos J. Ninos. "Effect of Die Fill on Compaction of Granular Bodies." In Whitewares and Materials: Ceramic Engineering and Science Proceedings, Volume 25, Issue 2, 61–80. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470291177.ch10.

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Chetia, Malaya, Manash P. Baruah, and Asuri Sridharan. "Effect of Quarry Dust on Compaction Characteristics of Clay." In Contemporary Issues in Geoenvironmental Engineering, 78–100. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61612-4_7.

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Wassenberg, R. B., M. Drygalov, and P. Beiss. "Effect of Die Material on Friction During Iron Powder Compaction." In Friction, Wear and Wear Protection, 104–9. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527628513.ch11.

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Chaklader, A. C. D., and S. K. Bhattacharya. "Effect of Additives on the Cold Compaction Behaviour of SiC Powder." In Sintering’85, 359–70. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-2851-3_39.

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Ragassi, Carlos Francisco, Carlos Alberto Lopes, and Ítalo Moraes Rocha Guedes. "Effect of Soil Compaction Alleviation on Quality and Yield of Potato." In Sustainable Potato Production: Global Case Studies, 403–18. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4104-1_24.

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Kumar, Himanshu, Sanandam Bordoloi, S. Sreedeep, and Ankit Garg. "Effect of Initial Compaction State on Erosion Potential for Cover Liner." In Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2, 589–97. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2224-2_73.

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Chandru, P., J. Karthikeyan, and C. Natarajan. "Effect of Sustainable Materials in Fresh Properties of Self-compacting Concrete." In Sustainable Materials in Building Construction, 1–29. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46800-2_1.

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Conference papers on the topic "Compactive effort"

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Cleveland, Aaron B., and Richard L. Orndorff. "COMPACTIVE EFFORT AND UNCONFINED COMPRESSIVE STRENGTH OF MT. MAZAMA ASH AND LATAH CREEK FLOODPLAIN SOIL IN EASTERN WASHINGTON." In 115th Annual GSA Cordilleran Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019cd-329028.

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Qamhia, Issam, Maximilian Orihuela, Scott Schmidt, Erol Tutumluer, Maziar Moaveni, Colin Basye, and Dingqing Li. "Railway Ballast Strength and Permeability Affecting Track Performance Under Dry and Wet Conditions." In 2018 Joint Rail Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/jrc2018-6256.

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Railway ballast is a major structural component of railroad track that also facilitates the drainage of water. Particle breakage and abrasion due to dynamic loading and environmental impacts causes ballast to age and degrade. The finer materials generated from ballast degradation can adversely affect the track stability especially under wet conditions. This paper investigates through laboratory testing the effect of moisture on the behavior and performance of in-service ballast. The tested ballast samples were initially subjected to an artificial rain system as well as train loadings in the Facility for Accelerated Service Testing (FAST) at the Transportation Technology Center, Inc. (TTCI). The rainy test section experiment applied realistic dynamic freight train loads and continuously monitored the test sections to determine the effects of moisture and saturation conditions on the field performance trends of ballasted track. Accordingly, ballast samples at varying levels of degradation were collected from the test locations to investigate ballast gradations as well as strength and permeability characteristics at dry and wet conditions. Shear strength tests were performed using a large-scale triaxial test machine, known as the TX-24, to study ballast degradation effects on the strength of dry ballast. Materials finer than the 3/8 in. (9.5 mm) were then collected and studied for the moisture-density behavior using a modified Proctor type compactive effort. Shear strength samples with the same gradations and degradation levels were prepared and tested at varying moisture contents of the 3/8 in. (9.5 mm) fraction ranging from 3% to 9%, with the latter being the optimum moisture content of these finer materials. The wet ballast triaxial test samples had strength values only in the range of 38% to 65% of the dry strengths. In addition to the strength tests, constant head permeability tests were also conducted on the ballast samples which demonstrated quite low and negligible horizontal flow amounts through ballast under static pressure heads and at various hydraulic gradients.
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Maryoto, Agus. "The effect of compaction method on compressive strength of self compacting concrete (SCC) in laboratory." In 1ST INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE AND ENGINEERING FOR SUSTAINABLE RURAL DEVELOPMENT. Author(s), 2019. http://dx.doi.org/10.1063/1.5097471.

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"An Experimental Investigation on Concrete Filled Steel Tube Columns Under Axial Compression." In Recent Advancements in Geotechnical Engineering. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901618-9.

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Abstract. This paper presents an experimental investigation on the behaviour of concrete filled steel tube columns under axial compression. The steel columns were filled with self-compacting and self-curing concrete instead of normal conventional concrete. A test program consisting of square column, circular column and rectangular column was firstly conducted. The behaviour of three concrete filled steel tubular sections (CFSTs) under axial load is presented. The effect of steel tube dimensions, shapes and confinement of concrete are also examined. Measured column strengths are compared with the values predicted by Euro code 4 and American codes. Euro code 4, gives good estimation of self-compaction concrete. However, lower values as measured during the experiments were predicted by the American Concrete Institute (ACI) equation. Also, the effect of thickness of steel tubes, concrete cube strength and steel percentage is also studied. In addition to CFST column the steel tube also acts as confinement for concrete.
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Nishi, Ryuichiro, Michio Sato, and Takaaki Uda. "Compaction Effect on Beach Stabilization." In 27th International Conference on Coastal Engineering (ICCE). Reston, VA: American Society of Civil Engineers, 2001. http://dx.doi.org/10.1061/40549(276)203.

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Panossian, H. V. "Nonobstructive Particle Damping (NOPD) Performance Under Compaction Forces." In ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0272.

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Abstract Presented herein are nonobstructive particle damping (NOPD) performance characteristics under forced compaction conditions. NOPD is a new passive vibration damping technique that consists of making small diameter holes (or cavities) at appropriate locations inside the main load-paths of a vibrating structure and filling these holes to appropriate levels with such particles that yield the maximum damping effect. Metallic or nonmetallic particles in powder, spherical, or liquid form (or even mixtures) with different densities, viscosities, and adhesive and cohesive characteristics can be utilized. In an effort to simulate centrifugal forces on particles placed inside blades of high rotational speed turbomachines, a special test article was made and different particles were tested under various compaction forces and vibration amplitudes. The effectiveness of NOPD was measured and compared with no compaction and no-particle conditions.
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P. Gotusso, A. "Effect of Scale and Frequency Dependency in Laboratory Clay-stone Samples." In EAGE Research Workshop 2008 - Compacting and Stressing Out Shales, from Geological to Production Timescales. European Association of Geoscientists & Engineers, 2008. http://dx.doi.org/10.3997/2214-4609.201402554.

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Deng, An, and Shi-long Xu. "Consolidating Dredge Soil by Combining Vacuum and Dynamic Compaction Effort." In GeoShanghai International Conference 2010. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41108(381)14.

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Iai, Masafumi, and Leslie Gertsch. "Effect of Regolith Compaction on Ripping Efficiency." In 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-1549.

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Jaksa, Mark, David Airey, Brendan Scott, Yien Lik Kuo, Tharanga Ranasinghe, Andrew Bradley, Oi Yin Chung, Yuxiao Li, and Yue Chen. "Quantifying the Effect of Rolling Dynamic Compaction." In The 4th World Congress on Civil, Structural, and Environmental Engineering. Avestia Publishing, 2019. http://dx.doi.org/10.11159/icgre19.1.

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Reports on the topic "Compactive effort"

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Rahman, Shahedur, Rodrigo Salgado, Monica Prezzi, and Peter J. Becker. Improvement of Stiffness and Strength of Backfill Soils Through Optimization of Compaction Procedures and Specifications. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317134.

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Vibration compaction is the most effective way of compacting coarse-grained materials. The effects of vibration frequency and amplitude on the compaction density of different backfill materials commonly used by INDOT (No. 4 natural sand, No. 24 stone sand, and No. 5, No. 8, No. 43 aggregates) were studied in this research. The test materials were characterized based on the particle sizes and morphology parameters using digital image analysis technique. Small-scale laboratory compaction tests were carried out with variable frequency and amplitude of vibrations using vibratory hammer and vibratory table. The results show an increase in density with the increase in amplitude and frequency of vibration. However, the increase in density with the increase in amplitude of vibration is more pronounced for the coarse aggregates than for the sands. A comparison of the maximum dry densities of different test materials shows that the dry densities obtained after compaction using the vibratory hammer are greater than those obtained after compaction using the vibratory table when both tools were used at the highest amplitude and frequency of vibration available. Large-scale vibratory roller compaction tests were performed in the field for No. 30 backfill soil to observe the effect of vibration frequency and number of passes on the compaction density. Accelerometer sensors were attached to the roller drum (Caterpillar, model CS56B) to measure the frequency of vibration for the two different vibration settings available to the roller. For this roller and soil tested, the results show that the higher vibration setting is more effective. Direct shear tests and direct interface shear tests were performed to study the impact of particle characteristics of the coarse-grained backfill materials on interface shear resistance. The more angular the particles, the greater the shear resistance measured in the direct shear tests. A unique relationship was found between the normalized surface roughness and the ratio of critical-state interface friction angle between sand-gravel mixture with steel to the internal critical-state friction angle of the sand-gravel mixture.
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Gureev, I. I. Minimizing the soil compaction effect of agricultural equipment engines. НИЦ «Л-Журнал», 2018. http://dx.doi.org/10.18411/sb.2018.01.003.

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Loman, J. M., T. J. Katsube, J. M. Correia, and M. A. Williamson. Effect of compaction on porosity and formation factor for tight shales from the Scotian Shelf. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/184128.

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