Journal articles: 'Slump test'

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Shacklock, Michael, Brian Yee, Tom Van Hoof, Russ Foley, Keith Boddie, Erin Lacey, J. Bryan Poley, et al. "Slump Test." SPINE 41, no. 4 (February 2016): E205—E210. http://dx.doi.org/10.1097/brs.0000000000001218.

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White, M. A., and K. E. Pape. "The Slump Test." American Journal of Occupational Therapy 46, no. 3 (March 1, 1992): 271–74. http://dx.doi.org/10.5014/ajot.46.3.271.

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Baudez, Jean-Christophe, Frédéric Chabot, and Philippe Coussot. "Rheological Interpretation of the Slump Test." Applied Rheology 12, no. 3 (June 1, 2002): 133–41. http://dx.doi.org/10.1515/arh-2002-0008.

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Abstract We examine the validity of the slump test for predicting the yield stress of polymeric suspensions and mineral suspensions. First we propose a modification of this test: in order to make measurements on fluids with high yield stress (of the order of several hundreds of Pascal) we add a mass at the sample top. From detailed observations of the slump in time we show that, for polymeric suspensions (hair gel and sewage sludges), two critical stresses can be distinguished which almost exactly correspond to the two critical stresses (respectively corresponding to a regime change and to the asymptotic slump) observed in rheometry during creep tests. Thus the slump test appears as a practiceful and relevant means to determine the intrinsic properties of these fluids. For mineral suspensions it is shown that the flow abruptly stops after a short time, a behaviour in agreement with the results of rheometrical tests carried out by progressively decreasing the applied stress. In that case the slump also appears to significantly depend on the procedure and cannot be related to a single property of the material.

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Wood, Marianne. "Smear test slump risks lives." Nursing Standard 31, no. 45 (July 5, 2017): 31. http://dx.doi.org/10.7748/ns.31.45.31.s27.

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Nasser, K. W., and S. Biswas. "A new method and apparatus for evaluation of the K-slump of concrete." Canadian Journal of Civil Engineering 23, no. 1 (February 1, 1996): 124–33. http://dx.doi.org/10.1139/l96-013.

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This paper introduces a new digital model of the K-slump tester. For the new tester (patent pending), it is theoretically shown that an inverse linear relationship exists between the K-slump of freshly mixed concrete or mortar and the yield stress τ0 in the Bingham model. The validity of this relation was investigated experimentally. Tests were conducted on cement pastes, mortar, and fresh concrete mixtures using a Hobart food mixer and the new tester. Power consumed by the mixer at three different speeds was measured along with the K-slumps for fresh concrete mixtures. The results give excellent agreement with the theoretically derived relationship. Hence, the K-slump of concrete was shown to be related to the yield stress τ0 by the equation K = Kmax − (constant × τ0), where Kmax is the maximum K-slump. To determine the precision of the new tester, an interoperator reliability test program was carried out in accordance with ASTM designation C 802. The results indicate that the new apparatus is accurate and reliable in evaluating the K-slump of fresh concrete. Key words: cement paste, concrete, consistency, flow, flowability, fresh concrete, K-slump, mortar, slump, rheology, workability.

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MAITLAND, GEOFFREY D. "The Slump Test: Examination and Treatment." Australian Journal of Physiotherapy 31, no. 6 (1985): 215–19. http://dx.doi.org/10.1016/s0004-9514(14)60634-6.

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Hoang, Nhat-Duc, and Anh-Duc Pham. "Estimating Concrete Workability Based on Slump Test with Least Squares Support Vector Regression." Journal of Construction Engineering 2016 (December 6, 2016): 1–8. http://dx.doi.org/10.1155/2016/5089683.

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Concrete workability, quantified by concrete slump, is an important property of a concrete mixture. Concrete slump is generally known to affect the consistency, flowability, pumpability, compactibility, and harshness of a concrete mix. Hence, an accurate prediction of this property is a practical need of construction engineers. This research proposes a machine learning model for predicting concrete slump based on the Least Squares Support Vector Regression (LS-SVR). LS-SVR is employed to model the nonlinear mapping between the mix components and slump values. Since the learning process of the LS-SVR necessitates two hyperparameters, the regularization and the kernel parameters, the grid search method is employed search for the most desirable set of hyperparameters. Furthermore, to construct the hybrid model, this research collected a dataset including actual concrete slump tests from a hydroelectric dam construction project in Vietnam. Experimental results show that the proposed model is capable of predicting concrete slump accurately.

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Dahl, Wendy J. "Alimentos en Pure: Prueba de Textura con la Prueba de Desplome." EDIS 2017, no. 1 (February 1, 2017): 4. http://dx.doi.org/10.32473/edis-fs288-2017.

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This is the Spanish version of FS276 Pureed Foods: Texture Testing with the Slump Test. For individuals with dysphagia, the texture of puréed foods is extremely important. If the puréed foods are either too thick or too thin, it can make it more difficult to swallow. The slump test is a quick, easy, and inexpensive way to assess the texture of foods. This four-page fact sheet describes the slump test, how to perform a slump test, and how the slump test can be used to evaluate the texture of puréed foods. Written by Wendy J. Dahl, and published by the Food Science and Human Nutrition Department.http://edis.ifas.ufl.edu/fs288

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Tay, Yi Wei Daniel, Ye Qian, and Ming Jen Tan. "Printability region for 3D concrete printing using slump and slump flow test." Composites Part B: Engineering 174 (October 2019): 106968. http://dx.doi.org/10.1016/j.compositesb.2019.106968.

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Al-Sharaa, Mohammed, Salwan Akram Salo, Ako Faiq Kareem, and Mohammed Sh Al-Edanni. "Slump Test versus Straight Leg Raise Test in the Diagnosing of Lumbar Disc Herniation: A Prospective Comparative Study." AL-Kindy College Medical Journal 17, no. 1 (April 30, 2021): 41–44. http://dx.doi.org/10.47723/kcmj.v17i1.309.

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Background: The clinical examination is one of the best suitable methods for diagnosis of low backache. Backache is one disease that the signs, clinical examination finding, and the results on imaging modalities not always related. The straight leg raising (SLR) and slump tests, can be used for diagnosis of lumber disc herniation. Objectives: To compare the result of the slump test and SLR test in the diagnosis of lumber disc herniation. Subjects and Methods: A prospective comparative study conducts on 280 patients in Al-Kindy teaching and private clinics complaints of backache, aging between 18-70 years old with acute or recurrent backache, sciatica pain, or low back and sciatica pain for last 12 weeks, while patients with spinal surgery, sacroiliac joints pain, cervical dysfunction and hip and knee pathology, and chronic illness were excluded. MRI of the lumbar region was done and clinically examine first by SLR test then Slump test on the next days by separated author. All the record collected patient’s data are interpreted with the MRI finding by the third doctor. Results: The Slump test is significant than the SLR in the patients with disc herniation at L4-L5 and (L4-5 &L5S1) 93.1% versus 70%, while for L5S1 level no significant in both tests. Leg pain present in 74.1 %, low back and leg pain in 21.5%, and only 4.4% present with low back only. Conclusion: The Slump test is more sensitive than the SLR test in diagnosis of lumber disc herniation.

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Budi, Basuki Setiyo, Supriyadi, Edy Suhartono, Mawardi, Sukoyo, Bintang, and Sakdiyah. "The Effects of Admixtures Addition on Slump Decrease and Concrete Compressive Strength at B-1 Concrete Works." Environmental Management and Sustainable Development 8, no. 4 (October 15, 2019): 93. http://dx.doi.org/10.5296/emsd.v8i4.15337.

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Semarang - Solo Toll Road is part of the Trans Java highway, which has a strategic meaning in the development of road networks, specifically in Central Java and also on a regional scale. The construction project generally consists of excavation work, stockpiles and bridge work. The number of work in the project therefore allows the emergence of a problem that can hinder the development process and one of which was related to concrete casting in the construction of the Kali Putih Bridge 1, where there was a slump decrease in columns P1 and P3 concrete pre-casting (30 Mpa). However, a slump test was carried out on column P1 in STA. 61 + 368,500, and P3 in STA. 61 + 293,500, which resulted in 3.5 cm and 4 cm collapse respectively. Hence, they did not meet specification on B-1 concrete, which was 7.5 ± 2.5 cm. In addition, Superplasticizer was used to overcome this problem, as it was capable of restoring freshness/workability. This study, therefore, aimed to determine the effect of the incorporating superplasticizer and retarder into concrete, on its compressive strength, slump decrease, and time, utilizing 24 test cylindrical specimens (7-days and 14-days), through pressure testing. Furthermore, the slump testing was conducted every 20 minutes for 120 minutes, to determine the reduction time, and the findings further indicated that adding a retarder to class B-1 concrete was capable of increasing the functional period (67 minutes on a slump of 7 ± 2.5 cm). However, the addition of Superplasticizer was also able to repair the slumps, which did not meet the requirements, including the specimen that involved the incorporation of a retarder (82.5 minutes, which resulted in a 1.9 cm slump that was further increased to 17.5 cm after augmentation. Furthermore, these effects were due to its ability to reduce the compressive strength by 3.13% and 6.14% on the 7-days and 14-day specimens, respectively. However, the SPSS v.23.0 test results showed the difference in compressive strength between the normal concrete + retarder and normal concrete + retarder + SP, with a sig value of 0.021 <a = 0.05 (Turkey HSD Test) and 0.0009 <a 0.05 (LSD Test).

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Liu, Y., N. J. Balmforth, and S. Hormozi. "Axisymmetric viscoplastic dambreaks and the slump test." Journal of Non-Newtonian Fluid Mechanics 258 (August 2018): 45–57. http://dx.doi.org/10.1016/j.jnnfm.2018.04.012.

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Walsh, Jeremy, Miriam Flatley, Niall Johnston, and Kathleen Bennett. "Slump Test: Sensory Responses in Asymptomatic Subjects." Journal of Manual & Manipulative Therapy 15, no. 4 (October 2007): 231–38. http://dx.doi.org/10.1179/106698107790819413.

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Omura, A. P., and J. F. Steffe. "Centrifugal Slump Test to Measure Yield Stress." Journal of Food Science 66, no. 1 (January 2001): 137–40. http://dx.doi.org/10.1111/j.1365-2621.2001.tb15595.x.

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Rajani, B., and N. Morgenstern. "On the yield stress of geotechnical materials from the slump test." Canadian Geotechnical Journal 28, no. 3 (June 1, 1991): 457–62. http://dx.doi.org/10.1139/t91-056.

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There exists an important class of materials, e.g., debris, volcanic lava, sludges, and remoulded sensitive clays, that are known to behave like a Bingham fluid. One of the important properties of a Bingham fluid is the so-called yield stress, and it is usually determined using a coaxial viscometer apparatus. It would be impractical and cumbersome to use this apparatus for many of the materials referred to earlier, and we propose here to examine the use of the slump test. The slump test is used in the concrete industry to evaluate workability and consistency. A statical model is developed to explain the deformation mechanism, and it permits the determination of yield stress. The validity of the statical model is verified using published data on mortar and our own data on Devon silt. The yield stress obtained with the slump test is also compared with the undrained shear strength obtained using the fall cone test. Good agreement is found between the two values. Key words: Bingham fluid, yield stress, slump test, Devon silt.

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Yamada, Yuji, Shinichiro Hashimoto, Chikanori Hashimoto, Takeshi Watanabe, and Shigeyuki Date. "Study on Vibration Properties of Fresh Concrete with Simple Test Method." Advanced Materials Research 1110 (June 2015): 267–70. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.267.

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It has been reported that, depending on the material used, batches of concrete having the same slump value behave differently when vibrated. It is therefore to be expected that batches of concrete having the same slump value and containing the same amount of powder will have different properties depending on the material used. However, these batches of concrete are treated as concrete of the same quality since, at present, no alternative test method has yet been established as a substitute for the slump test. This study proposed new simplified experimental methods for vibration properties of fresh concrete. By using these methods, the vibration characteristics of fresh concrete containing fly ash (FA) and containing a large amount of cement were exhibited.

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PHILIP, KATHLEEN, PAUL LEW, and THOMAS A. MATYAS. "The Inter-Therapist Reliability of the Slump Test." Australian Journal of Physiotherapy 35, no. 2 (1989): 89–94. http://dx.doi.org/10.1016/s0004-9514(14)60499-2.

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Lai, Weng-Hang, Yi-Fen Shih, Pei-Ling Lin, Wen-Yin Chen, and Hsiao-Li Ma. "Normal neurodynamic responses of the femoral slump test." Manual Therapy 17, no. 2 (April 2012): 126–32. http://dx.doi.org/10.1016/j.math.2011.10.003.

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Azimi, Amir H. "Analysis of Slump Test for Sand–Foam Mixtures." Journal of Materials in Civil Engineering 29, no. 9 (September 2017): 04017109. http://dx.doi.org/10.1061/(asce)mt.1943-5533.0001971.

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Fidel, Constance, Elizabeth Martin, Wim Dankaerts, Garry Allison, and Toby Hall. "Cervical Spine Sensitizing Maneuvers During the Slump Test." Journal of Manual & Manipulative Therapy 4, no. 1 (January 1996): 16–21. http://dx.doi.org/10.1179/jmt.1996.4.1.16.

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Aggarwal, Amita, and Sarvanan Jayakrishnan. "Sensory and Knee Range of Motion Responses of Slump Test on Unaffected and Radiculopathy Affected Limb in Patients with Lumbar Disk Herniation." Journal of Postgraduate Medicine, Education and Research 50, no. 1 (2016): 1–4. http://dx.doi.org/10.5005/jp-journals-10028-1182.

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ABSTRACT Background Disk herniation is common—it is seen in up to a quarter of magnetic resonance imaging (MRI) and can be detected even in asymptomatic adults. The slump test has become widely advocated as a neural tissue provocation test for clinical assessment of patients with spinal and lower limb pain. The purpose of this study was to determine the sensory and terminal knee extension limitation responses produced during slump test on radiculopathy affected and unaffected limb in patients with lumbar disk herniation. Objectives To compare the sensory and knee range of motion (ROM) responses produced during slump test on affected and unaffected limb. Materials and methods Fifty patients, 25 to 45 years of age chronic disk herniation patients with unilateral radiculopathy with/without lower backache. Patient underwent standardized history and physical examination followed by slump test. Outcomes included terminal knee extension limitations and sensory response produced in terms of intensity numeric rating scale (NRS), nature and location (pain drawings). Results During slump test end position, NRS score and restricted terminal knee ROM comparative results were highly significant (p < 0.001). Based on nature and location of sensory response, maximum number of subjects in affected limb had pain in center of lower back radiating to whole lower limb and for unaffected limb stretch at back of knee. Conclusion In this study, it was suggested that though sensory and knee ROM responses are present in both affected and unaffected limb but the radiculopathy affected limb was more affected in terms of intensity of pain and limitation of motion. How to cite this article Aggarwal A, Jayakrishnan S, Singh A. Sensory and Knee Range of Motion Responses of Slump Test on Unaffected and Radiculopathy Affected Limb in Patients with Lumbar Disk Herniation. J Postgrad Med Edu Res 2016;50(1): 1-4.

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He, Pei Xiang, Bing Liu, and Sheng Hu. "Research on the Working Performance of Self-Compacting Concrete at Different Substitution Rates of Iron-Tailings." Advanced Materials Research 1065-1069 (December 2014): 1930–33. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.1930.

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In this paper, iron-tailings was substituted for natural sand in self-compacting concrete(SCC). Iron-tailings SCC mix proportioning design at different substitution rates were made. Slump,slump-flow, the time T500(S) of the slump-flow reaching 500mm, J-ring test, U-flow test were used to evaluate the iron-tailings SCC mixture working performances at different substitution rates, which contrast to the common SCC working performances. Through the experimental results and their variation regulations, taking the single working performance into consideration,a reasonable range about the substitution rate of iron-tailings is obtained.

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Zhu, Han. "On Building Crumb Rubber Concrete Test Sites." Key Engineering Materials 302-303 (January 2006): 411–17. http://dx.doi.org/10.4028/www.scientific.net/kem.302-303.411.

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Presence of crumb rubber can change the concrete characteristics in a significant way. This article presents some experience of building crumb rubber concrete (CRC) test sites, and the data of on-site measurement with respect to slump and air content of fresh CRC samples.

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Gawu, S. KY, and A. B. Fourie. "Assessment of the modified slump test as a measure of the yield stress of high-density thickened tailings." Canadian Geotechnical Journal 41, no. 1 (February 1, 2004): 39–47. http://dx.doi.org/10.1139/t03-071.

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Yield stress values of four thickened (high-density) mineral tailings at varying solids concentrations were determined using three different techniques. The first set of values was measured using the modified slump test approach with an open-ended cylinder having an aspect ratio of 1.2. A second set was derived from measurements obtained from a coaxial cylinder fitted to a Rheolab® MC1 rheometer. The results were graphically compared with those obtained using the miniature vane technique, a popular and well-accepted method of measuring yield stress. Empirical relations developed from the modified slump test appear to predict reasonably accurate yield stress values up to about 200 Pa when compared with the vane and rheometer results. It is concluded that, although the time-dependent nature of the tailings tested may induce errors as much as ±30% for some samples, the modified slump test provides a reliable and simple test for evaluating the yield stress of thickened tailings. The method can therefore be employed as a first approximation of the changing parameters of high-density thickened tailings in the field without necessarily resorting to sophisticated equipment.Key words: high-density thickened tailings, rheology, shear yield stress, slump, torque.

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Charrier, Malo, and Claudiane Ouellet-Plamondon. "Testing Procedures on Materials to Formulate the Ink for 3D Printing." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 2 (February 2020): 21–32. http://dx.doi.org/10.1177/0361198120907583.

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Three-dimensional (3D) printing has been used in various fields to tackle applications difficult for conventional manufacturing. To realize the full potential of this technology in the transportation sector, it is imperative to identify suitable tests and mixtures for printing “inks” made of mortar. In this study, several conventional and non-conventional tests on mortars and cement pastes were conducted. This work highlights the correlation between the results of slump test and the deformation test that indicates the comportment of the mixture under a stack of printed layers. Moreover, a strong connection between yield stress and mini-slump is observed, demonstrating a simplification of the testing procedure, and a link between the mortar and the cement paste is developed. In the printing ink design phase, this association enables the prediction of flowability. The yield stress and the final radius of the mini-slump tests were very well correlated for the admixture tested. The use of the mini-slump test simplifies the testing procedure and allows for quicker formulations of admixtures in the printing ink.

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Wang, Li Jiu, Xin Gu, and Min Hu. "Workability Evaluation of Self Compacting Concrete." Applied Mechanics and Materials 44-47 (December 2010): 2359–63. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.2359.

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The compactibility, mobility and segregation stability of self compacting concrete (SCC) is essential for its quality control. Completely and reasonably workability evaluation to SCC has an obviously influence in concrete engineering field. The paper introduced the rheology and workability mechanism of SCC. Ten workability assessment methods, such as Slump Flow test, U-box test, J-ring test, L-box test, VSI method, Oriment test, V-funnel test, Inverted Slump Cone test, were presented and the advantages and disadvantages of each appraisal procedure and the evaluation practice were analyzed. It also put forward the prospect direction of workability evaluation of SCC.

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Hussein, Aqeel Abdulhasan. "Assessing the Quality of Concrete Using Process Capability Index (Slump Test Case Study)." Journal of Advanced Research in Dynamical and Control Systems 12, no. 01-Special Issue (February 13, 2020): 671–76. http://dx.doi.org/10.5373/jardcs/v12sp1/20201116.

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Liu, Li, and Wen Yang. "The Method to Test the Homogeneity of Concrete." Key Engineering Materials 633 (November 2014): 485–89. http://dx.doi.org/10.4028/www.scientific.net/kem.633.485.

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As the ultra high way and long distance pumping concrete became increasingly common, the engineers not only required the concrete have large liquidity but also increasingly concerned about the homogeneity of concrete. However, without effective and convincing method, currently the engineers had to assess and judge the homogeneity just by their sight, feel and experience. In order to test the homogeneity rapidly, exactly and quantitatively, a new device and method was developed relaying on the theory that the barycentre of the concrete which was filled in regular-shape container would deflect away from the shape-centre of the container more or less if the components with different density in concrete separated to stratifications. C30 and C40 concrete whose slump≥180mm and slump flow≥480mm were tested by this method and their homogeneity modulus (Cv) were figured out by the supporting formula. The result showed that the homogeneity of concrete was accredited if 0.90<Cv<1.10, and Cv was closer to 1.00, the homogeneity was better.

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Oluwasola, E. A., A. Afolayan, I. O. Ameen, and E. O. Adeoye. "Effect of Curing Methods on the Compressive Strength of Palm Kernel Shell Aggregate Concrete." LAUTECH Journal of Civil and Environmental Studies 5, no. 1 (September 27, 2020): 11–17. http://dx.doi.org/10.36108/laujoces/0202/50(0120).

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High cost of building construction in the country has remained a major source of concern to successive government in the nation. Building materials constitute approximately 60-70% of the building cost. In view of this, the need for alternate building materials is imminent. This research work focuses on assessment of effect of different curing methods on the compressive strength of palm kernel shell aggregate concrete. All materials were collected at Ede, Osun state. The stages involved in this research are material collection, batching and mixing, casting of concrete cubes, slump test, curing, and compressive strength test. The tests carried out were x-ray fluorescence, slump test and compressive strength. Four different curing methods were used; water, air, salt water, and detergent to cure concrete with two mixing ratios of 1:2:4 and 1:1½:3. It can be observed that the Palm Kernel Shell (PKS) contains mainly Iron (Fe), Potassium (K), Calcium (Ca), Manganese (Mn) elements and other impurities. From the slump test results, it can be deduced that 1:1½:3 gave a better slump as expected. The compressive strength of cube ranges from 2.244 to 3.852N/mm2 Based on the results, the curing methods has a significant effect on the compressive strength of the PKS aggregate concrete.

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Hao, Ji, Caiyun Jin, Yue Li, Zigeng Wang, Jianglin Liu, and Hongwen Li. "Simulation of Motion Behavior of Concrete in Pump Pipe by DEM." Advances in Civil Engineering 2021 (May 25, 2021): 1–16. http://dx.doi.org/10.1155/2021/3750589.

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In this paper, the mesocalibration test was used to measure the contact parameters (restitution coefficient, rolling friction coefficient, static friction coefficient, and surface energy) between coarse aggregate particles and mortar particles in Discrete Element Method (DEM) model of concrete. Then, the DEM model of concrete slump was established according to the coarse aggregate gradation to study the flow behavior of coarse aggregate in fresh concrete. The slump test result was compared with the output of the slump DEM model with high consistent, indicating the promising reliability of the mesocalibration test. Finally, based on the mesocalibration test results, the DEM model of pumping concrete was established. It was obtained that the pumping pressure calculated by the numerical model was similar to that of the pumping test with satisfactory accuracy better than the concrete pumping pressure calculated according to the rheological test results of concrete and lubricating layer. On this basis, the movement trajectory of coarse aggregate in the pump pipe was analyzed and the influence of coarse aggregate on the pumping performance of concrete was revealed.

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Li, Fang Xian, Qi Jun Yu, Jiang Xiong Wei, and Jian Xin Li. "Predicting the Workability of Self-Compacting Concrete Using Artificial Neural Network." Advanced Materials Research 168-170 (December 2010): 1730–34. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.1730.

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An artificial neural network (ANN) is presented to predict the workability of self compacting concrete (SCC) containing slump, slump flow and V-test. A data set of a laboratory work, in which a total of 23 concretes were produced, was utilized in the ANNs study. ANN model is constructed, trained and tested using these data. The data used in the ANN model are arranged in a format of six input parameters that cover the cement, fly ash, blast furnace slag, super plasticizer, sand ratio and water/binder, three output parameters which are slump, slump flow and V-test of SCC. ANN-1, ANN-2 and ANN-3 models which containing 15 ,11 and 5 neurons in the hidden layers, respectively are found to predict workability of concrete well within the ranges of the input parameters considered. The three models are tested by comparing to the results to actual measured data. The results showed that ANN-2 is the best suitable for predicting the workability of SCC using concrete ingredients as input parameters.

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Besso, Carlos, and Tácio Mauro Pereira de Campos. "On the evaluation of yield stress of soils for debris flow analysis." E3S Web of Conferences 92 (2019): 05002. http://dx.doi.org/10.1051/e3sconf/20199205002.

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Debris flow materials behave as a fluid, hence its analysis requires rheological parameters such as yield stress and viscosity. Yield stress is associated to the start and the end of the mass movement downhill in the sense that it denotes the yield transition from the creep to the flow regime, i.e., passage from solid to fluid state. This paper presents an experimental study of the yield stress of a colluvium from Rio de Janeiro, through its determination in a modified set-up of the slump test and in a rotational parallel plate rheometer. Tests were performed in five different water contents above its liquidity limit, providing a fairly good relationship between yield stress and water content. While slump test provides yield stress related to the beginning of the movement (acceleration), rheometer results are related to flow's outset and stoppage. As a result, the percentual differences between yield stresses associated with acceleration and deceleration were less than 5% in all testes, which is related to the low hysteresis effect in the flow curves obtained in the rotational rheometer. Comparing the two methodologies, it is proposed a correction from rheometer to slump test results. Results obtained are compared with data presented in other studies involving soil's yield stress, showing a good acceptance of the slump test results as a cheap alternative to rheometers.

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Prastowo, Fairuza Putri, Bambang Djatmiko, and N. Bambang Revantoro. "APLIKASI LOGIKA FUZZY SUGENO UNTUK PREDIKSI NILAI SLUMP DAN KUAT TEKAN BETON." BANGUNAN 25, no. 1 (March 30, 2020): 33. http://dx.doi.org/10.17977/um071v25i12020p33-40.

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Abstrak:Salah satu faktor yang mempengaruhi nilai slump dan kuat tekan beton adalah bahan-bahan penyusun beton. Logika fuzzy Sugeno digunakan untuk prediksi nilai slump dan kuat tekan beton dengan bantuan software MATLAB versi 8.5.0.197613 R2015a. Penelitian menggunakan desain eksperimental aplikatif dan validasi dengan sistem Multiple Input Double Output (MIDO). Hasil penelitian : 1) Variabel multiple input terdiri dari semen, agregat kasar, agregat halus, dan air. Variabel double output terdiri dari nilai slump dan kuat tekan beton. 2) Himpunan fuzzy yang digunakan himpunan variabel linguistik minimum-medium-maksimum dengan fungsi keanggotaan segitiga. 3) Perhitungan cara manual dengan 4 tahapan, yaitu: membuat himpunan dan multiple input variabel, aplikasi fungsi implikasi, komposisi aturan, dan deffuzifikasi. 4) Perhitungan cara komputasi. 5) Hasil validitas diperoleh: a) hasil perhitungan ouput cara manual sama dengan output cara komputasi, yaitu nilai slump 8,75 cm dan kuat tekan 50 MPa, b) uji linearitas menghasilkan nilai koefisien determinasi R2 sama dengan 0,967 lebih dari 0,95 untuk slump dan R2 sama dengan 0,9516 lebih dari 0,95 untuk kuat tekan beton, c) uji beda rerata didapat P-value 0,200 lebih dari 0,05 untuk slump dan P-value 0,136 lebih dari 0,05 untuk kuat tekan beton. Maka, program dinyatakan valid dan layak digunakan. 6) Simulasi aplikasi logika fuzzy Sugeno dilakukan 5 kali dengan hasil: a) Jumlah semen, jumlah agregat kasar, jumlah agregat halus dan jumlah air berbanding lurus dengan nilai slump dan kuat tekan beton, b) Jumlah semen berbanding terbalik dengan air. Apabila jumlah semen maksimum dan jumlah air minimum maka menghasilkan nilai slump minimum dan kekuatan tekan beton maksimum dan sebaliknya, c) Agregat halus berbanding lurus dengan agregat kasar. Sehingga nilai slump dan kuat tekan beton akan mengalami minimum, medium dan maksimum apabila agregat kasar medium dan agregat halus medium.Kata-kata kunci: Logika fuzzy, Metode Sugeno, slump beton, kuat tekan beton.Abstract: One of the factors that influence the value of slump and compressive strength of concrete is the ingredients of concrete. Sugeno fuzzy logic is used to predict slump values and concrete compressive strength with the help of MATLAB software version 8.5.0.197613 R2015a. The study uses an applicative experimental design and validation with a Multiple Input Double Output (MIDO) system. Results: 1) Multiple input variables consisting of cement, coarse aggregate, fine aggregate, and water. The double output variable consists of slump value and concrete compressive strength. 2) Fuzzy set which is used minimum-medium-maximum linguistic variable set with triangle membership function. 3) Calculation of the manual method with 4 stages, namely: creating sets and multiple input variables, application of function implications, composition of rules, and deffuzification. 4) Calculation of computational methods. 5) The validity results are obtained: a) the results of manual output calculation are the same as the output of the computational method, namely the slump value of 8.75 cm and compressive strength of 50 MPa, b) the linearity test produces a coefficient of determination R2 is 0.967 more than 0.95 for the slump and R2 is 0.9516 more than 0.95 for concrete compressive strength, c) the average difference test obtained P-value 0.200 more than 0.05 for slump and P-value 0.136 more than 0.05 for concrete compressive strength. Then, the program is declared valid and is feasible to use. 6) Sugeno fuzzy logic application simulation is done 5 times with the results: a) The amount of cement, the amount of coarse aggregate, the amount of fine aggregate and the amount of water is directly proportional to the slump value and concrete compressive strength, b) The amount of cement is inversely proportional to water. If the maximum amount of cement and minimum amount of water results in a minimum slump value and maximum concrete compressive strength and vice versa, c) Fine aggregate is directly proportional to coarse aggregate. So the value of slump and compressive strength of concrete will experience a minimum, medium and maximum if the coarse aggregate is medium and the fine aggregate is medium.Keywords: Fuzzy logic, Sugeno Method, concrete slump, strong concrete reach.

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Li, Shu Jin, Jian Fen Li, and Hong Ping Qian. "Preparation and Application of High Dropping Non Vibration Self-Compacting Concrete." Applied Mechanics and Materials 584-586 (July 2014): 1490–94. http://dx.doi.org/10.4028/www.scientific.net/amm.584-586.1490.

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High dropping non vibration concrete is widely used in high-rise steel tube concrete construction. In this paper, a high dropping non vibration self-compacting concrete with high mobility, low slump loss, and good anti-segregation ability is developed by mixing addition of PCA superplasticizer and SCC composite expansive admixture. The test results showed that the admixture and cement used in the test possess sound compatibility. The slump flow of self-compacting concrete prepared are more than 660mm, T500 of 2.8~7.5s, 1h slump flow loss of less than 10%, and the segregation rate of less than 7.5%. Through strictly control production and dropping construction, supplemented by field ultrasonic detection measures, the high dropping self-compacting concrete in steel tube achieved successful application for a high-rise building.

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Rodway, L. E. "Testing of zero-slump piling concrete." Canadian Journal of Civil Engineering 14, no. 3 (June 1, 1987): 308–13. http://dx.doi.org/10.1139/l87-049.

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For several years it had been noted in the field that in the absence of an accepted, rational standard method for testing impact-placed zero-slump piling concrete, a variety of strength levels were produced from the same sample of fresh concrete depending upon which of a variety of test methods happened to be used. Finally, in 1977 the Canadian Standards Association published a standard method. This method subsequently proved ambiguous and impractical in practice to many field engineers.This paper presents the results of a laboratory and field study conducted during 1985 directed at the rational development of a practical test method to realistically predict the appropriate concrete strength, [Formula: see text], to be used in the calculation of the structural load-carrying capacity of this type of pile. Key words: zero slump, impact piles, energy input, vibration, compaction, concrete strength.

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Hoornahad, Hooman, and Eduard A. B. Koenders. "Simulation of the Slump Test Based on the Discrete Element Method (DEM)." Advanced Materials Research 446-449 (January 2012): 3766–73. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.3766.

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The slump test is a very important industrial test for evaluation of workability of fresh granular-cement paste material, especially concrete. The test method is used as a generic tool for classification of a wide range of mixtures and can deal with a wide range of workabilities. The current paper presents a numerical approach, based on Discrete Element Method (DEM), with the aim to study the effect of the mix composition on the rheological behavior of a mixture after demolding, i.e. lifting the slump cone. The research approach is based on a conceptual idea, where the particle-paste interaction is explicitly modelled as an interactive two phase “paste –particle” system. Each mixture is considered to consist of these elements with the rheological behaviour characterized by the “excess paste” model. Simulations and experimental laboratory test results show good agreement.

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Gao, Jinglong, and Andy Fourie. "Spread is better: An investigation of the mini-slump test." Minerals Engineering 71 (February 2015): 120–32. http://dx.doi.org/10.1016/j.mineng.2014.11.001.

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Hooton, RD, CF Ferraris, and F. de Larrard. "Modified Slump Test to Measure Rheological Parameters of Fresh Concrete." Cement, Concrete and Aggregates 20, no. 2 (1998): 241. http://dx.doi.org/10.1520/cca10417j.

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Choi, Myoung Sung, Jung Soo Lee, Keum Seong Ryu, Kyung-Taek Koh, and Seung Hee Kwon. "Estimation of rheological properties of UHPC using mini slump test." Construction and Building Materials 106 (March 2016): 632–39. http://dx.doi.org/10.1016/j.conbuildmat.2015.12.106.

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Bouvet, Adrien, Elhem Ghorbel, and Rachid Bennacer. "The mini-conical slump flow test: Analysis and numerical study." Cement and Concrete Research 40, no. 10 (October 2010): 1517–23. http://dx.doi.org/10.1016/j.cemconres.2010.06.005.

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Němeček, Jiří, and Jiří Němeček. "NUMERICAL SIMULATION OF SLUMP FLOW TEST OF CEMENT PASTE COMPOSITES." Acta Polytechnica CTU Proceedings 30 (April 22, 2021): 58–62. http://dx.doi.org/10.14311/app.2021.30.0058.

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This study presents a numerical simulation of the mini-slump flow test performed on the Haegerman table, according to EN 1015-3. The two-dimensional axisymmetrical Volume of fluid (VOF) model is used for the calculation. Various scenarios with the different model set up and boundary conditions were calculated to show how the results are affected. Simulations with different lifting velocities were carried out and compared to the case with instantaneous demolding, which is commonly used in numerical simulations. Also, the effect on results is shown between noslip and specific shear boundary conditions on the mold. The results of simulations indicate that mold lifting should be considered in numerical modeling even if calculation time is highly prolonged. Lifting velocities should not exceed the value of 0.2 m/s in order to maintain laminar flow and stablecalculation.

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Sukanli, Decka Chaniago, and Priyanto Saelan. "Tinjauan Ulang Mengenai Kadar Maksimum Pipih dan Memanjang Agregat Kasar dalam Campuran Beton Cara SNI. (Hal. 107-115)." RekaRacana: Jurnal Teknil Sipil 5, no. 2 (September 25, 2019): 107. http://dx.doi.org/10.26760/rekaracana.v5i2.106.

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ABSTRAKDalam campuran beton, agregat kasar memiliki 70% sampai 80% pengaruh terhadap kuat tekan beton. Agregat kasar memiliki bentuk yang berbeda seperti membulat, pipih, dan memanjang tergantung pada sumbernya. Dalam penelitian ini, dilakukan penyelidikan pada kadar maksimum bentuk pipih dan memanjang agregat kasar dalam campuran beton. Pada penelitian kadar bentuk pipih dan memanjang agregat kasar ini menggunakan benda uji silinder dengan ukuran diameter 10 cm dan tinggi 20 cm. Pengujian dilakukan dengan uji slump dan uji kuat tekan beton yang mengacu pada SNI. Slump rencana yang digunakan yaitu (30-60) mm dan (60-180) mm dengan kuat tekan beton rencana yaitu 30 MPa usia 28 hari. Hasil pengujian ini dapat diketahui bahwa kadar pipih dan memanjang agregat kasar melebihi 20% tidak berpengaruh terhadap kuat tekan beton selama kadar pipih dan memanjang agregat kasar tidak melebihi 45% dari total agregat batu pecah.Kata kunci: bentuk pipih dan memanjang, agregat kasar, kuat tekan beton, uji slump ABSTRACTIn concrete mixture, coarse aggregate has 70% to 80% influence on concrete compressive strength. The coarse aggregate have different shape like rounded, angular, flaky and elongated depending on the source. In this study, we investigated the maximum level of flat and elongated coarse aggregate in concrete mixture. In the study of the level of flat and elongated forms coarse aggregates using cylindrical specimen with a diameter of 10 cm and a height of 20 cm. Testing was conducted with slump and concrete compressive strength test which refers to SNI. The slump plan used is (30-60) mm and (60-180) mm with a 30 MPa concrete compressive strength of 28 days. The results of this test can be seen that the flat and elongated of coarse aggregates exceeding 20% does not effect compressive strength of the concrete as long as the flat and elongated of coarse aggregates not exceed at 45% of the total aggregates.Keywords: flat and elongated shape, coarse aggregates, compressive strength, slump test

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Çınar, Muhammet, Mehmet Karpuzcu, and Hanifi Çanakcı. "Effect of Waste Marble Powder and Fly Ash on the Rheological Characteristics of Cement Based Grout." Civil Engineering Journal 5, no. 4 (April 27, 2019): 777–88. http://dx.doi.org/10.28991/cej-2019-03091287.

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This paper shows the results of an experimental study conducted to research the impact of waste marble powder (WMP) and fly ash (FA) on the fluidity (marsh cone flow time (MCFT), mini-slump diameter and plate cohesion meter (PCM)) and the rheological properties (viscosity and yield stress) of cement based grout (CBG) mixtures. The experiments were applied with the CBG mix including 1.00 water-binder (w/b) ratios and combined use of WMP (5-25%), FA (5-25%) and WMP+FA (10-30% + constant 25%). Test results illustrated that the rheological properties of the CBGs importantly have been improved by the addition of WMP, FA and WMP+FA to grout mix at w/b=1 ratio. Strongly shear thickening behaviour was got from the CBG mixtures the all WMP, FA and WMP+FA content. The increase in the percentage of WMP (5-25%) amount reduced the mini-slump flow diameter. Moreover, the increment in the percentage of FA (5-25%) amount increments the mini slum flow. According to the control sample, the increment in the percentage of WMP (10-25%) amount increased the mini-slump flow diameter for constant FA (25%) content. Also, the increase in WMP amount in the CBG mix, there is no effect on MCFT. Also, MCFT decreased with the increase of FA amount. Especially, FA increased the fluidity of CBG, when the WMP showed negative effect in increase the MCFT in WMP+FA content.

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Kuilart, Kate Elissa, Melanie Woollam, Elizabeth Barling, and Nicholas Lucas. "The active knee extension test and Slump test in subjects with perceived hamstring tightness." International Journal of Osteopathic Medicine 8, no. 3 (September 2005): 89–97. http://dx.doi.org/10.1016/j.ijosm.2005.07.004.

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Ding, Xinxin, Haibin Geng, Kang Shi, Li Song, Shangyu Li, and Guirong Liu. "Study on Adaptability of Test Methods for Workability of Fresh Self-Compacting SFRC." Materials 14, no. 18 (September 15, 2021): 5312. http://dx.doi.org/10.3390/ma14185312.

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To ensure the quality of concrete construction, the workability of fresh mix measured by rational test methods is critical to be controlled. With the presence of steel fibers, whether the test methods and evaluation indices of fresh self-compacting concrete (SCC) are adaptable for self-compacting steel fiber reinforced concrete (SFRC) needs to be systematically verified. In this paper, seven groups of self-compacting SFRC, referenced with one group SCC, were prepared by using the mix proportion design method based on the steel fiber-aggregates skeleton packing test. The main factors included the volume fraction and the length of hooked-end steel fiber. Tests for filling ability, passing ability, and stability of fresh self-compacting SFRC and SCC were carried out. Results indicate that the adaptability was well for the slump-flow test with indices of slump flow and flow time T500 to evaluate the filling ability, the J-ring flow test with an index of PA level to evaluate the passing ability, and the static segregation test with an index of static segregation resistance to evaluate the stability of fresh self-compacting SFRC. By the repeated tests and measurements, the slump cone should be vertically lifted off to a height of 300 mm within 3 s at a constant speed, the spacing of the rebar in the J-ring test should be adjusted to be two times the fiber length. If the table jumping test is used, the dynamic segregation percent should be increased to 35% to fit the result of the static segregation test. Good workability of the self-compacting SFRC prepared in this study is presented with the general evaluation of test results.

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Bensebti, Salah Eddine, Salima Aggoun, El Hadj Kadri, and Ourdia Haddad. "Experimental Test for Evaluation of SCC Static Segregation." Advanced Materials Research 875-877 (February 2014): 68–76. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.68.

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A Self-Compacting Concrete (SCC) is by definition one that, due to its own weight, pours and sets in place in the most complex reinforced moulds. It is important to note that the material must not undergo any form of segregation, whether “dynamic”, i.e. when it occurs during flowing, or “static”, i.e. when it occurs in the mould after compaction of different materials in the concrete. In this paper, study of static resistance segregation of self-compacting concretes is presented. Experimental assessment of segregation is carried out by procedure, which is realized in this paper. This procedure is similar to column test but different cylinder geometry and splitting is carried out at the end of setting. For each of the different mixtures studied, we also measure the slump flow, the filling ratio (L-box test), the screen stability and the V-funnel flowing time. The results obtained show that in the case of SCC, specific tests must be carried out to assess static segregation, especially when slump flow is above 70 cm. This study also shows that it is possible to obtain high quality SCC (with no risk of segregation) with screen stability test values in the region of 30%, which are much greater than the usual 15% recommended pat the French association of civil engineering AFGC [1].

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Wang, Bao Min, Hai Nan Ma, Ming Li, and Yu Han. "Effect of Metakaolin on the Physical Properties and Setting Time of High Performance Concrete." Key Engineering Materials 539 (January 2013): 195–99. http://dx.doi.org/10.4028/www.scientific.net/kem.539.195.

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Abstract. Kaolin native to Jilin Province was calcined at the constant temperature of 750°C for 4 hours to obtain the high pozzolanic metakaolin(Al2Si2O7). The effects of metakaolin (MK) on the static flow expansion of cement paste and the workability and setting time of concrete were studied with the content of 0, 5%, 10% and 15% by weight of cementitious material. The test results show that: when the dosage of superplasticizer is 2% by weight of cementitious material, the setting time of concrete shortens obviously and the slump and expansion decrease with the raising of MK content. When 5% of cement is replaced by MK, the setting time of concrete shortens by 5%; the slump and the slump flow decrease by 5.5% and 4.4% respectively.

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Tuan, Nguyen Manh, Quach Van Hau, Sangyoon Chin, and Seunghee Park. "In-situ concrete slump test incorporating deep learning and stereo vision." Automation in Construction 121 (January 2021): 103432. http://dx.doi.org/10.1016/j.autcon.2020.103432.

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Chen, Feng, Denis Jelagin, and Manfred N. Partl. "Experimental and numerical analysis of asphalt flow in a slump test." Road Materials and Pavement Design 20, sup1 (March 8, 2019): S446—S461. http://dx.doi.org/10.1080/14680629.2019.1587495.

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Yun, Tae Young, Sang Hyeok Ahn, Jueong Hee Nam, and Pyeong Jun Yoo. "Simulation of Aggregate Slump Test Using Equivalent Sphere Particle in DEM." Journal of the Korean Society of Road Engineers 15, no. 5 (October 15, 2013): 21–29. http://dx.doi.org/10.7855/ijhe.2013.15.5.021.

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Journal articles on the topic 'Slump test'

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