Relevant bibliographies by topics / Unconfined compressive strength test (UCS)

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Unconfined compressive strength test (UCS)'

Author: Grafiati
Published: 3 June 2025
Last updated: 19 July 2025

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Journal articles on the topic "Unconfined compressive strength test (UCS)"

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Jabbar, Muhammad Abdul. "CORRELATIONS OF POINT LOAD INDEX AND PULSE VELOCITY WITH THE UNIAXIAL COMPRESSIVE STRENGTH FOR ROCKS." Journal of Engineering 17, no. 04 (2011): 992–1006. http://dx.doi.org/10.31026/j.eng.2011.04.25.

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Rock engineers widely use the uniaxial compressive strength (UCS) of rocks in designingsurface and underground structures. The procedure for measuring this rock strength has beenstandardized by both the International Society for Rock Mechanics (ISRM) and American Societyfor Testing and Materials (ASTM), Akram and Bakar(2007).In this paper, an experimental study was performed to correlate of Point Load Index ( Is(50))and Pulse Wave Velocity (Vp) to the Unconfined Compressive Strength (UCS) of Rocks. The effectof several parameters was studied. Point load test, Unconfined Compressive Strength (U
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Martireni, Antonina Pri, Wira Cakrabuana, Koko Hermawan, et al. "COMPARATIVE ANALYSIS AND EVALUATION OF THE CONVERSION FORMULA FOR REBOUND NUMBER OF SCHMIDT HAMMER TEST AND UNCONFINED COMPRESSIVE STRENGTH TEST – CASE STUDY: ANDESITE ROCK SLOPE IN GRAHA PUSPA, LEMBANG FAULT." Rudarsko-geološko-naftni zbornik 39, no. 1 (2024): 45–54. http://dx.doi.org/10.17794/rgn.2024.1.5.

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The Unconfined Compressive Strength (UCS) test is one of the most common methods for determining the rock material strength value. However, the size and complexity of the instrument do not allow UCS testing to be carried out in the field. The UCS value can be estimated in the field by converting the rebound number using the Schmidt hammer test. This research aims to carry out a comparative analysis and evaluation of the conversion formula for rock compressive strength values resulting from the Schmidt hammer test and UCS test in a case study of andesite rock slopes at Graha Puspa, Lembang Faul
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Pan, Andrew, and Murray Grabinsky. "Mechanical Characterization of Cemented Paste Backfill." Eng 4, no. 1 (2023): 738–47. http://dx.doi.org/10.3390/eng4010044.

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Mechanical characterization is important to the design and analysis of cemented paste backfill (CPB) structures. Unconfined compressive strength (UCS) tests have been widely used owing to their relative simplicity to characterize a material’s response to unconfined compressive loading. However, the UCS represents a single strength parameter and does not fully describe the material’s strength (or failure) envelope. In this study, we analyzed UCS tests with direct shear and uniaxial tensile strength tests conducted on the same CPB materials to provide mechanical characterization of CPB under a m
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Pochalard, Sakol, Chalermpon Wungsumpow, and Keeratikan Piriyakul. "Enhancement on compressive strength of Bangkok clay cement using novel high-strength polyethylene fibers." IOP Conference Series: Earth and Environmental Science 1335, no. 1 (2024): 012008. http://dx.doi.org/10.1088/1755-1315/1335/1/012008.

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Abstract This study aims to investigate the effect of novel high-strength polyethylene fibers on the unconfined compressive strength (UCS) behavior of concrete produced with admixed Bangkok clay cement. Bangkok clay samples were prepared at a liquid limit of 88% and were added to ordinary Portland cement (OPC) at 2, 4, 6, 8 and 10% by weight; polyethylene fibers were also added at 0.5, 1.0, 1.5, 2.0 and 2.5% by volume. These samples were cured for 7, 14, and 28 days and subjected to an unconfined compressive test. From the test results, the cement content of 8% by weight was the optimum, and a
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Zhu, Yan, Xiangjuan Yu, Lei Gao, Jiajia Chen, and Michael Dino Cotugno. "Unconfined Compressive Strength of Aqueous Polymer-Modified Saline Soil." International Journal of Polymer Science 2019 (November 5, 2019): 1–11. http://dx.doi.org/10.1155/2019/9137069.

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Saline soil is a special soil that consists of fine particles and has poor engineering properties. It causes salt heaving and is collapsible and corrosive. The treatment of this type of soil for the use as a resource for roadbed fillings has been one of the most important engineering topics in highway construction near coastal areas. This study introduces a new type of aqueous polymer, called ZM, which is used to amend and stabilize saline soil. To test the effects of ZM-solidified saline soil, unconfined compressive strength (UCS) tests were carried out on unmodified and ZM-modified saline so
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Sianturi, Novdin Manoktong, Mohd Khairul Amri Kamarudin, Dermina Roni Santika Damanik, Virgo Erlando Purba, and Deardo Samuel Saragih. "The Mechanical Behavior of Soft Soil Stabilized with Lime and Volcanic Ash." MEDIA KOMUNIKASI TEKNIK SIPIL 28, no. 1 (2022): 118–27. http://dx.doi.org/10.14710/mkts.v28i1.41963.

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The properties of soft clay can be seen from the compressive strength value through the unconfined compressive strength (UCS) test. Soft soil was less well used as the subgrade for construction. The aim is to determine the increase in the unconfined compressive strength and bearing capacity of the foundation due to the addition of lime and volcanic ash on soft soil. Soft soil has undrained shear strength < 25 kPa based on the unconfined compressive strength test. The unconfined compressive strength test has been conducted on the soil-lime mixture and soil-volcanic ash mixture of 3-12% respe
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Zukri, Azhani, and Nadiatul Adilah Ahmad Abdul Ghani. "A Study of Soil Stabilization by Hydrated Lime at Kampung Kedaik Asal, Rompin, Pahang, Malaysia." Applied Mechanics and Materials 695 (November 2014): 738–41. http://dx.doi.org/10.4028/www.scientific.net/amm.695.738.

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This study involves the clay sample which is taken from Kampung Kedaik Asal, Rompin site and evaluation of its properties in natural state and after stabilization. The main objectives of this paper is to estimate the optimum lime content (OLC) needed to stabilize the soil by using Eades-Grim pH Test, to determine the optimum moisture content (OMC) and maximum dry density (MDD) of the treated soil by Standard Proctor Test and also the strength value of the soil specimens with different percentages of lime content corresponding with different curing period by Unconfined Compressive Strength (UCS
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Jiang, Ping, Yewen Chen, Lin Zhou, et al. "The Time Effect and Micromechanism of the Unconfined Compressive Strength of Cement Modified Slurries." Advances in Materials Science and Engineering 2021 (April 19, 2021): 1–15. http://dx.doi.org/10.1155/2021/5597275.

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This study investigated the unconfined compressive strength change law of cement modified slurries (CMS) under different curing ages. We conducted unconfined compressive strength tests using slurry and cement as raw materials. The cement contents were 5%, 10%, 15%, 20%, and 25%. The curing ages were 7, 14, 28, 56, 90, 120, 150, and 180 d. A time effect model of CMS strength was established based on the measured UCS strength-curing age and the strength-cement content curves. The test results proved that the UCS of the CMS increased significantly with an increase in the curing age, and after 90
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Ma, Qiang, Junjie Chen, Wentao Li, and Nianze Wu. "Studying the Properties of Chromium-Contaminated Soil Solidified by Polyurethane." Polymers 15, no. 9 (2023): 2118. http://dx.doi.org/10.3390/polym15092118.

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The solidification of chromium-contaminated soil using polyurethane (PU) was systematically investigated. The unconfined compression test was conducted to investigate the effects of the curing time, PU dosage and the content of chromium ions on the unconfined compressive strength (UCS) of chromium-contaminated soil. The effect of the PU dosage on the pore structure was investigated using nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM), and the mechanism of strength change was revealed by combining the strength law with the pore structure development law. In addition, th
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Pande, Prashant, Jayant Raut, Rajesh Bhagat, and Boskey Bahoria. "Influence of Agro-Industrial Waste on Unconfined Compression Strength Parameters of Expansive Soil: An Experimental Investigation." Journal of Advanced Research in Applied Mechanics 125, no. 1 (2024): 27–41. http://dx.doi.org/10.37934/aram.125.1.2741.

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Expansive soils pose a significant challenge in construction due to their potential to cause structural damage through its swelling and shrinking characteristics. Simultaneously, the disposal of numerous industrial and agricultural wastes poses challenges that contribute to environmental ecosystem damage. This experimental study explores the effect of agro-industrial waste on the mechanical properties of expansive soil. Specifically, the impact of incorporating agro-industrial waste materials, such as bagasse ash, plastic strips, and coir fiber, is investigated through assessments of unconfine
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Dissertations / Theses on the topic "Unconfined compressive strength test (UCS)"

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Yeo, Yang Sheng. "Characterisation of cement-treated crushed rock basecourse for Western Australian roads." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/2277.

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Cement treatment for pavement basecourse materials results in the creation of cement treated basecourse which is either classified as "modified" or "stabilised". The two classifications perform differently in service, with susceptibility to fatigue being the most obvious characteristic delineating the two. This classification methodology is currently quantified based on Unconfined Compressive Strength (UCS) ranges.Throughout the 1990s to the early 2000s, Main Roads Western Australia (MRWA) has investigated various basecourse products created by adding cement. However, due to unexpected behavio
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McFaddin, Jared Douglas. "Development of Correlations for Unconfined Compression Strength and Methods of Field Preparations and Preservation of Kope Shale." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1217259954.

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Crook, Amy Lyn. "Assessment of the Tube Suction Test for Identifying Non-Frost-Susceptible Soils Stabilized with Cement." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/804.

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Frost heave is a primary mechanism of pavement distress in cold regions. The distress exhibited is dependent on the frost susceptibility of the soil within the depth of frost penetration, the availability of subsurface water, and the duration of freezing surface temperatures. Cement stabilization is one technique used to mitigate the effects of frost heave. The tube suction test (TST) is one possible method for determining the frost susceptibility of soils in the laboratory. The purpose of this research was to assess the utility of the TST for identifying non-frost-susceptible (NFS) materials
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Jayakody, Arachchige Shiran Pradeep. "Investigation on characteristics and performance of recycled concrete aggregates as granular materials for unbound pavements." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/78131/1/Shiran%20Pradeep_Jayakody%20Arachchige_Thesis.pdf.

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This research was a step forward in investigating the characteristics of recycled concrete aggregates to use as an unbound pavement material. The results present the guidelines for successfully application of recycled concrete aggregates in high traffic volume roads. Outcomes of the research create more economical and environmental benefits through reducing the depletion of natural resources and effectively manage the generated concrete waste before disposal as land fill.
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Brown, Ashley Vannoy. "Cement Stabilization of Aggregate Base Materials Blended with Reclaimed Asphalt Pavement." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1314.pdf.

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Rogers, Tyler J. "Variability in Construction of Cement-Treated Base Layers: Probabilistic Analysis of Pavement Life Using Mechanistic-Empirical Approach." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3273.pdf.

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Asgarali, Khan Mohammedali. "Effect of Lime and Fly Ash on Cation Exchange Capacity (CEC) and Unconfined Compressive Strength (UCS) of Soils." Thesis, 2015. http://ethesis.nitrkl.ac.in/7244/1/2015_Effect_Asgarali.pdf.

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The utilization of fly ash in India varies between 50-60% and the rest are disposed in ash ponds. The fly ash which are utilized for reclamation of low lying areas or which are used in geotechnical engineering application has the tendency of leaching the heavy metal pollutants and thus polluting the groundwater, surface water and surrounding soil. Also the discharge of effluents from waste water treatment plants may lead to pollution of the ground water. If these ground water pollution can be controlled by increasing the Cation Exchange Capacity of the sub soil through application of any of th
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Σκούρας, Νικόλαος. "Έμμεσος προσδιορισμός της θλιπτικής αντοχής πετρωμάτων με την δοκιμή της επιφανειακής διείσδυσης". 2005. http://nemertes.lis.upatras.gr/jspui/handle/10889/92.

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Παρουσιάζεται μία εναλλακτική μέθοδος έμμεσου προσδιορισμού της θλιπτικής (μονοαξονικής) αντοχής των πετρωμάτων με βάση μία τροποποιημένη μορφή της δοκιμής επιφανειακής διείσδυσης. Χρησιμοποιήθηκαν δύο έμβολα με σφαιρικά άκρα με ακτίνες 1,585mm και 5mm. Τα αποτελέσματα συγκρίνονται με αυτά της διαδεδομένης μεθόδου σημειακής φόρτισης. Αποδεικνύεται πειραματικά ότι για τα τρία ασβεστολιθικά πετρώματα που μελετήθηκαν, η δοκιμή επιφανειακής διείσδυσης δίνει σημαντικά ακριβέστερα αποτελέσματα και μπορεί να εφαρμοστεί τόσο στο εργαστήριο όσο και στο πεδίο. Επιπλέον αποδείχθηκε ότι η δοκιμή προσφέρει
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Books on the topic "Unconfined compressive strength test (UCS)"

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Cold Regions Research and Engineering Laboratory (U.S.), ed. Axial double-ball test versus the uniaxial unconfined compression test for measuring the compressive strength of freshwater and sea ice. US Army Corps of Engineers, Cold Regions Research & Engineering Laboratory, 1993.

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Book chapters on the topic "Unconfined compressive strength test (UCS)"

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Oruabena, Bernard, and Okoh Elechi. "Expansive Soil Subgrade: Soil Treatment Using Waste Ceramic Dust and Cement." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4355-1_63.

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AbstractThis study examines the potential application of leftover ceramic dust for stabilising expansive soil in infrastructure projects. We know that expansive soils have low strength and bearing capacity, which makes them troublesome in the natural world. Therefore, it’s crucial to level off weak or powerless soil to increase the sublevel’s bearing limit and support a suitable, long-lasting wearing course. To stabilise the soil, the poor soil was taken from Yenagoa, Bayelsa state in the South-South region of Nigeria, and mixed with varying amounts of waste ceramic dust. Standard Proctor compaction, soaked/unsoaked CBR testing, unconfined compressive strength tests, and consistency limit tests were used to evaluate the applicability of stabilised soil. The OMC appreciated at 7.5% of CD, which was utilized as an additive at 17.9 KN/m2, according to the results. From 1.72 to 1.74 KN/m2, MDD increased. From 9.3% at 0% to 16.77% (unsoaked) at 10% admixture (WCD + PLC) and 2.60% at 0%, according to the CBR test results, there was a rise. The highest (CBR) value was obtained when the mixture was soaked to 11.52%, as opposed to 16.77% when it was unsoaked. It was revealed that stabilisation in UCS improved with replacement ratios of 2.5%, 5%, 7.5%, and 10%, in that order. In conclusion, it was found that expanding soil stabilisation can be achieved without failure by using the ideal mix design.
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Wang, Bo, Huimin Hu, and Jianglong Yao. "Experimental Study on the Effect of Redispersible Latex Powder on Pavement Performance of Road Base." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-5814-2_1.

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AbstractThrough unconfined compressive strength test, flexural tensile strength test, freeze-thaw test, dry shrinkage test and SEM, the improvement effect and mechanism of redispersible latex powder on the mechanical properties of recycled cement stabilized macadam were studied. The results show that the flexural and tensile strength of recycled cement stabilized macadam mixture increased and the compressive strength decreased slightly after adding latex powder. With the addition of latex powder, the BDR value of cement stabilized macadam increased, and the frost resistance of the mixture improved. Adding latex powder can reduce the shrinkage strain and shrinkage coefficient of cement stabilized macadam, and significantly improve its crack resistance. SEM images show that the latex powder polymer forms a network-like connection structure in the mixture, which can absorb the shrinkage deformation of mineral particles and hydration products in the material, and significantly reduce the shrinkage strain of the specimen.
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Osman, Nur Masyitah, Ahmad Syauqi Md Hasan, Mohd Khairul Azhar Ismail, Aniza Albar, and Mohd Mustaqim Noordin. "Empirical Correlation of Tropical Weathered Sandstone Uniaxial Compressive Strength Using Unconfined Compression Test and Point Load Test." In Regional Conference on Science, Technology and Social Sciences (RCSTSS 2016). Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0074-5_41.

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Theivakularatnam Mathanraj and Gnanendran Carthigesu T. "Evaluating the Durability of Lightly Stabilized Granular Base Materials Subjected to Wet-Dry Cycles Using Different Element Testings." In From Fundamentals to Applications in Geotechnics. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-603-3-1560.

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A laboratory study was undertaken to evaluate the durability of lightly stabilized granular base material subjected to wet-dry (w-d) cycles using repeated load triaxial (RLT) test, unconfined compressive strength (UCS) test and flexural beam test. RLT and flexural tests were conducted on a typical granular base material stabilized with 1.5% cement-flyash (CF) binder and the test specimens were cured for 28 days. Two different CF binder contents of 1.5% and 3% were selected to stabilize the UCS test specimens which were then cured for 7 days. Cured specimens were then subjected to w-d cycles prior to the testing. RLT test studied the permanent and resilient deformation behaviour of lightly stabilized granular base material subjected to w-d cycles under cyclic loading whereas UCS and flexural beam test were carried out under monotonic loading to determine the UCS and Modulus of rupture (MoR). Irrespective of the testing, specimens stabilized with 1.5% binder deteriorated heavily and did not last for more than 4 w-d cycles. UCS specimens stabilized with 3% binder showed greater resistance to w-d cycles and remained integrated even after 12 w-d cycles. MoR was significantly affected by w-d cycles compared with other mechanical properties. This study indicates that evaluating the durability using permanent deformation from multi-stage RLT test or UCS test is a better approach than conducting resilient modulus test.
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Ngan-Tillard D.J.M., Engin H.K., Verwaal W., and Mulder A. "UCS estimation for Maastricht limestones by Needle penetration testing." In Proceedings of the 15th European Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2011. https://doi.org/10.3233/978-1-60750-801-4-235.

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The Needle Penetration Test (NPT) is used to estimate the unconfined compressive strength (UCS) of the Maastrichtian limestones. In parallel to UCS testing, NPT has been conducted for the future A2 tunnel in Maastricht, the Netherlands on borehole cores ranging from very weak calcarenite to carbonate sands. NPT results are correlated to UCS values and clustered to give a qualitative material strength estimation. The spatial distribution of the very low NPT values is tentatively related to the occurrence of faults. Then, the relationships between UCS and NP resistance observed in the laboratory for calcarenites are analysed. The spreading of the results is related to the material microstructure. An accurate UCS estimation cannot be derived from a single NPT value. To get an insight on the processes taking place during NP testing, the total needle resistance and shaft friction have been recorded and microstructural damage has been observed. Final damage consists of crushing and compaction, related to high stresses, rather than de-bounding of grains, observed in UCS testing. Despite this difference in damage type, resistance to needle penetration and UCS values are related.
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Kumar Patel, Suchit. "Experimental Investigation of Glass Fiber Reinforced Clayey Soil for Its Possible Application as Pavement Subgrade Material." In New Approaches in Foundation Engineering [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102802.

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A clayey soil reinforced with commercially obtainable20 mm glass fiber of varying fiber content (fc = 0.25 to 1% by soil dry weight) was investigated in lab for its possible application as road pavement material. Standard proctor compaction, unconfined compression strength (UCS), California Bearing Ratio (CBR) and undrained triaxial compression tests were conduction on compacted soil-fiber specimens as per ASTM standard. From the fiber mixing process it has been observed that fiber can be uniformly mixed into clayey soil only up to some optimum fiber content. Laboratory test results predicted that UCS, CBR and shear strength value of clayey soil enhanced significantly with fiber content up to some optimum value of 0.75% fiber content. The UCS increases maximum up to two fold, CBR by 2.8 times and shear strength by around 1.75 times than that of clayey soil alone. The inclusion of glass fibers enhances the ductility of clayey soil and modifies its failure pattern from brittle to ductile. It has been found that the glass fiber reinforced clayey soil can be used significantly as a subgrade material for low volume flexible road pavement.
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Joshi Kaushal, Soga Kenichi, and Tedd Paul. "Long-Term Performance of Cement-Bentonite Containment Wall." In Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2009. https://doi.org/10.3233/978-1-60750-031-5-2028.

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The paper presents hydraulic conductivity, unconfined compression strength (UCS) and triaxial test results of an 11 year old slag-cement-bentonite (CB) cut-off wall material and identifies factors affecting their long-term performance. The laboratory tests were performed on three types of CB samples ranging from contaminated block field samples to uncontaminated laboratory cast samples. The results showed that hydraulic conductivity reduces till 3 years and UCS increases till 90 days, but there after it remains constant till 11 years of age. The mean hydraulic conductivity and UCS values of block field samples are inferior and have large variability than laboratory cured samples. Such variations are mainly because of heterogeneity caused by aggressive environment and impurities within the specimen. Consolidated undrained triaxial test found that under an effective confining pressure of less than 200 kPa, tension failure occurred since the minor principal stress dropped to zero value at failure. The research outcome is useful for understanding future liability of CB wall and improving their design.
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Li, Yongxiang, Kuiliang Ji, Xiao Li, Li Lv, and Ren Mu. "Performance Research and Mechanism Analysis of Industrial Solid Waste Geopolymer Stabilized Crushed Stone." In Advances in Transdisciplinary Engineering. IOS Press, 2024. https://doi.org/10.3233/atde241045.

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With the development of industry, the development and utilization of a large number of natural resources in Inner Mongolia, a large number of industrial solid waste storage caused a series of environmental problems. Using industrial solid waste such as Mineral powder, fly ash and wet carbide slag to prepare geopolymer to replace part of cement for pavement base construction, not only solves the problem of large solid waste consumption, but also protects the environment. In this paper, the strength variation law and strength formation mechanism of mixtures with different geopolymer content were studied by mechanical property test, scanning electron microscope (SEM) and mercury intrusion porosimetry (MIP) test. Meanwhile, based on the grey relation theory, the correlation degree between the indexes of harmful pores, harmful pores and total porosity and the mechanical properties indexes was obtained. The results show that the performance of the mixture is also different with the different content of geopolymer. In the case of 20% geopolymer content, the UCS (unconfined compressive strength) and ITS (indirect tensile strength) at the same age are better than those of the mixture without geopolymer, while the mechanical properties of the mixture with 40% geopolymer content are lower than those of the mixture without geopolymer. The grey relation analysis shows that the UCS and ITS of the mixture under different geopolymer content are mainly affected by the rise of harmful holes, while the CRM (compressive resilient modulus) is not affected by the change of pore size, but decreases with the increase of geopolymer content.
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Al-Taie A.Y., Disfani M.M., Evans R.P., Arulrajah A., and Horpibulsuk S. "Determination of Optimum Lime Content for Volcanic Expansive Clays." In From Fundamentals to Applications in Geotechnics. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-603-3-1623.

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This paper reports on a new method for determination of the optimum lime content for stabilisation of volcanic expansive clays. The suitability of past methods such as Eades and Grim is also discussed. In this study, Braybrook (West Melbourne, Australia) volcanic expansive clay was stabilized using hydrated lime. Physical properties of untreated samples and those treated with 2, 3, 4, 6, 8, and 10 percentages of lime were obtained. Results of the Loss of Ignition test indicate that some organic material was present in the studied clay. PH concentration of each mixture was determined at different curing periods (1.5hr, 7, 28, and 57 days). In addition, a range of tests such as Atterberg limit, linear shrinkage strain (without curing), swelling potential, and Unconfined Compressive Strength (UCS) (under curing periods of 7 and 28 days) were performed to find the Optimum Lime Content (OLC) of treated samples. Test results suggest that there is a drop in pH concentration with curing time. While swelling potential results suggest an OLC of 4%, UCS tests suggest a 6% OLC, same as plasticity indices and linear shrinkage tests. However, the OLC is about 2.64% according to Eades and Grim procedure. Subsequently, Eades and Grim method was found not to be applicable to volcanic expansive soils. The difference in OLC values for untreated and treated samples and the modifications are discussed in this paper.
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Elkady Tamer, Shaker Abdullah, Baig Arif A., and Al-Shamrani Mosleh. "Effect of intermittent wetting on the UCS of lime-treated expansive soils." In From Fundamentals to Applications in Geotechnics. IOS Press, 2015. https://doi.org/10.3233/978-1-61499-603-3-1639.

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Laboratory determination of design lime content to be applied in the field involve preparing soil-lime specimens with different lime contents to evaluate their swelling potential and unconfined compressive strength (UCS) after curing for 7 or 28 days. Curing of specimens is typically conducted under the conditions of ambient temperature and relative humidity greater than 95%. During field application, lime-treated expansive soils may be subjected to cases of increase moisture. This paper investigates the effect of wetting during curing period on the UCS of lime-treated expansive clay. An experimental program was devised where lime-treated specimens were subjected to different wetting schemes (whether a single wetting event or multiple wetting events) and the UCS at the end of the curing period is evaluated. Other parameters investigated included lime content (2%, 4% and 6% on dry weight basis) and curing period (7, 14 and 28 days). Results of the tests indicated that wetting schemes had a detrimental effect on the UCS of lime-treated specimens; especially at low lime content (i.e., 2%). Furthermore, as the lime content increased, the percentage reduction in UCS decreased.
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Conference papers on the topic "Unconfined compressive strength test (UCS)"

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Acharya, Manish, Tadesse G. Wakjira, and Mustafa Mashal. "Study on Confinement of Ultra-High Performance Concrete Using Ties." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.0259.

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<p>Ultra-high-performance concrete (UHPC) has been gaining increased popularity due to its higher strength and ductility than conventional concrete, promoting sustainability through resource efficiency and extended structural life. Accurate modeling of UHPC structures relies on a stress- strain model for confined UHPC. While many studies have examined the unconfined compressive behavior of UHPC, limited research focuses on confined compressive behavior. This has become a challenge for the adoption of UHPC, especially in seismic regions. Thus, this study presents an experimental test resu
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Alkinani, Husam Hasan, Abo Taleb Tuama Al-Hameedi, Shari Dunn-Norman, and Mustafa Adil Al-Alwani. "Statistical Models to Predict Tensile Strength from Unconfined Compressive Strength: Case Study from Southern Iraq." In SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205589-ms.

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Abstract Tensile strength (To) is an important parameter for creating geomechanical models, especially when tensile failure is the failure of interest. The most common way to estimate the tensile strength is by utilizing Brazilian tests. However, due to material limitation, cost, or time, To is sometimes assumed or estimated empirically. In this work, laboratory test data of To and Unconfined Compressive Strength (UCS) conducted for three zones in southern Iraq (Zubair sandstone, Zubair shale, and Nahr Umr shale) were utilized to create three regression models to estimate To from UCS. The reas
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Seymour, J. B., D. J. Sweet, T. M. Emery, S. A. Murray, G. D. Feagan, and J. P. Bourgeois. "Effect of Sample Size on the Unconfined Compressive Strength of Cemented Mill Tailings." In International Geomechanics Conference. ARMA, 2024. https://doi.org/10.56952/igs-2024-0321.

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Abstract: To determine if the size of a cemented mill tailings sample affects its unconfined compressive strength (UCS), researchers with the National Institute for Occupational Safety and Health (NIOSH) conducted three series of UCS tests with cylindrical samples of cemented paste backfill (CPB), ranging in size from 0.5×1.0 inch (13×25 mm) to 6×12 inches (150×300 mm), after the samples had cured for 28, 90, and 180 days. The average strengths of the standard sized samples were comparable, indicating that 2×4-inch (50×100-mm) cylinder molds provide a reasonable alternative to larger sized cyl
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Al Senani, A., M. H. Al-Aamri, M. Al Omairi, Y. Abri, A. AlRubkhi, and A. Al Ghafri. "Enhancing Mechanical Specific Energy (MSE) Analysis Through Geomechanical Triaxial and Scratch Test Data: Estimating Confined Compressive Strength (CCS) in Deep Tight Gas Rocks, North of Oman." In SPE Conference at Oman Petroleum & Energy Show. SPE, 2025. https://doi.org/10.2118/225020-ms.

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Abstract Drilling operations in deep tight reservoirs (>4000 m) pose significant challenges due to the complex nature of these formations. In this context, the application of mechanical specific energy has emerged as a valuable tool for understanding drilling challenges and optimizing operational parameters. However, a crucial aspect in MSE calculation is the accurate estimation of the rock strength properties. Conventionally, rock strength properties (e.g., unconfined compressive strength) are obtained from logs or laboratory tests performed on core plugs; however, UCS values may not a
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Zaheer, Muhammad. "Proposed UCS-Based Correlation for Rock-Socket Design of Bored Piles in Abu Dhabi, UAE." In Deep Foundations Institute 49th Annual Conference. Deep Foundations Institute, 2024. https://doi.org/10.37308/dfi49.20241080402.

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Limited published information is available on the design guidelines for rock-socket friction of piles in Abu Dhabi, United Arab Emirates. The prevailing industry practice relies on empirical correlations between shaft capacity and the unconfined compressive strength proposed by various authors for the weak rocks. Pile load test results consistently indicate that current design methods underestimate shaft capacities. Despite this, optimization in rock socket lengths is rarely practised in local design and construction. This paper aims to share design experience with the local industry, proposin
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Abugharara, Abdelsalam, Salum Mafazy, and Stephen Butt. "A New Approach for Rock Strength Estimation Through a Semi-Point Load Strength Index and Correlation With Destructive and Nondestructive Tests." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-81556.

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Abstract Multi scale projects of civil, mining, and oil and gas drilling require to determine rock strength as main property of surface and subsurface rocks for safe structures, economic mining operations, as well as drilling performance optimizations. The Unconfined Compressive Strength (UCS) as a main rock strength test is considered a time consuming for sample preparation, costly, and unaffordable. However, it is required for correlations for rock strength obtained from other tests. A semi-Point Load Strength Index (Semi-PLSI) is proposed in this research as a new approach to estimate rock
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Addo-Yobo, A. D., A. Hussain, H. Emadi, E. Maslowski de Moraes, and M. Watson. "Artificial Neural Network for the Prediction of Unconfined Compressive Strength of Ultra Lightweight Cement for Oil and Gas Wells." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-1109.

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ABSTRACT: This study demonstrates the use of Artificial Neural Network (ANN) modeling techniques to estimate the Unconfined Compressive Strength (UCS) of lightweight oil and gas well cement. At varied simulated wellbore temperatures, 172 cement samples were reinforced with variable doses of strength-enhancing ceramic cenospheres. An Isothermal water bath was used to cure the cement samples for 24 hours and the samples were crushed using a compressive load frame. Multiple samples comprising the same properties were crushed to confirm the consistency of the dataset. The model was trained with 70
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Salawu, Babatunde, Reza Sanaee, and Olumayowa Onabanjo. "Rock Compressive Strength: A Correlation from Formation Evaluation Data for the Niger Delta." In SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2559289-ms.

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ABSTRACT The purpose of this paper is to study the strength of rocks by determining their Unconfined Compressive Strength (UCS), correlate the determined strength to physical properties of rocks that can be measured from formation evaluation data and derive an equation that can be used to derive rock strength from formation evaluation measurements. The scope of this work is limited to the Niger delta basin from which core samples were taken. The method used for this research was to collect data of existing core samples at different depths and in various fields in the Niger Delta, then determin
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Jiao, K. F., and C. Zhou. "Effects of Curing Temperature and Stress on the Mechanical Behaviour of Cemented Hong Kong Marine Clay." In The HKIE Geotechnical Division 43rd Annual Seminar. AIJR Publisher, 2023. http://dx.doi.org/10.21467/proceedings.159.20.

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Deep cement mixing (DCM) is an important method for treating soft clay. In the field, cemented soils are usually subjected to various temperatures and stresses during the curing process. The influence of curing conditions, including the curing temperature and stress, on the mechanical behaviour of cemented soil has not been well understood. In this study, the effects of cement content, curing temperature and curing stress on the strength of cemented soil were studied by unconfined compression tests. Hong Kong marine clay with an initial water content of 65% was used. Cemented specimens were pr
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Malicki, E. A., T. R. M. Packulak, É. Gagnon, M. S. Diederichs, and J. J. Day. "Measuring Brittle Damage Thresholds of Crystalline Rocks by Acoustic Emissions on Compressive and Tensile Laboratory Tests." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-0445.

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ABSTRACT: The use of acoustic emission (AE) monitoring in brittle rock laboratory testing is one of the most accurate methods for measuring damage evolution and failure. In this study, AE data was collected from two separate laboratory testing programs. The first program consists of a series of unconfined compressive strength (UCS) tests completed on moderately foliated meta-sedimentary rocks from the Bathurst Mining Camp in New Brunswick, Canada, and high metamorphic grade tonalite gneiss from the Pointe du Bois pluton in Manitoba, Canada. The second program consists of a series of Brazilian
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Reports on the topic "Unconfined compressive strength test (UCS)"

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Shivakumar, Pranavkumar, Kanika Gupta, Antonio Bobet, Boonam Shin, and Peter J. Becker. Estimating Strength from Stiffness for Chemically Treated Soils. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317383.

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The central theme of this study is to identify strength-stiffness correlations for chemically treated subgrade soils in Indiana. This was done by conducting Unconfined Compression (UC) Tests and Resilient Modulus Tests for soils collected at three different sites—US-31, SR-37, and I-65. At each site, soil samples were obtained from 11 locations at 30 ft spacing. The soils were treated in the laboratory with cement, using the same proportions used for construction, and cured for 7 and 28 days before testing. Results from the UC tests were compared with the resilient modulus results that were av
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Davis, E. R. Unconfined compressive strength (UCS) and pentrometer UCS approximations of core (4,309.5'-4,409') from the BP Exploration (Alaska) Inc. Milne Point G-1 well. Alaska Division of Geological & Geophysical Surveys, 2004. http://dx.doi.org/10.14509/19161.

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Kovacs, Austin. Axial Double-Ball Test Versus the Uniaxial Unconfined Compression Test for Measuring the Compressive Strength of Freshwater and Sea Ice. Defense Technical Information Center, 1993. http://dx.doi.org/10.21236/ada277025.

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Becker, Peter J. Using the Light Weight Deflectometer for Performance-Based Quality Assurance Testing of Cement Modified Subgrades. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317304.

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This report documents the findings from SPR-4230 (Alternative Quality Assurance Methods for Compacted Subgrade). The main objective of SPR-4230 involved establishing performance-related quality assurance (QA) test methods for pavement subgrade construction. Because INDOT generally prefers specifying subgrade treatment type IBC (i.e., 14-in. cement modified subgrade), this study focused on performance-based QA test methods for constructing cement modified subgrade. Moreover, INDOT prefers using light weight deflectometer (LWD) for chemically modified subgrade construction acceptance, so this st
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