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Journal articles on the topic 'Hard workability'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Machniak, Łukasz, and Wiesław Kozioł. "Method of Assessment of Hard Rock Workability using Bucket Wheel Excavators." Archives of Mining Sciences 62, no. 1 (2017): 73–82. http://dx.doi.org/10.1515/amsc-2017-0006.

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Abstract A new hypothesis concerning a process of the mining solid rocks using bucket wheel excavators (BWE). Destroying of the rock mass structure is a result of breaking and not, as so far accepted, of cutting. This approach excludes, for the description of solid rock workability using bucket wheel excavators, used classifications based on individual linear or surface resistances of cutting. The possibility of a replacement mechanism for determining of the workability by bucket wheel excavators using rippers was assumed. On this basis, an innovative method for assessing the workability of so

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Salenko, Аleхandеr, Mykhailo Elizarov, Viktor Shchetinin, M. A. Al-Kuraan Tarek, and Sergiy Klymenko. "Application of chemography for evaluating the workability of hard alloy cutting plates." Mechanics and Advanced Technologies 88, no. 1 (2020): 135–40. http://dx.doi.org/10.20535/2521-1943.2020.88.204782.

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Vivek, Shrivastava, and Sanjeev Kumar Verma Dr. "The Assessment Aims to Determine the Impact of Changing the Initial Properties on the Variation in Characteristics of Concrete." Journal of Sustainable Construction Engineering and Project Management 6, no. 2 (2023): 45–53. https://doi.org/10.5281/zenodo.8112154.

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<em>Nowadays, it has been found that characteristic of set hard concrete is highly affected by the initial properties of newly made concrete. Hereafter, it has been identified by the results of researches going worldwide that properties at the time of preparing concrete affects the performance of set concrete as physical and chemical properties of newly made concrete or mortar control the characteristics of hardened concrete. Strength mainly Compressive Strength is the most significant criteria indicating the long term condition and performance of the infrastructural concrete. Therefore, deter

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Firouzei, Yavar, Jafar Hassanpour, Daniele Peila, Sadegh Tarigh Azali, and Carmine Todaro. "Evaluation of foam application in providing required conditioning for EPB hard rock TBMs." Geomechanics and Tunnelling 16, no. 4 (2023): 409–21. http://dx.doi.org/10.1002/geot.202300003.

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AbstractUtilizing the earth pressure balancing technique on hard rock tunnel boring machines (TBMs) is an efficient way to overcome engineering geological hazards that disrupt the application of these machines. Considering that geomechanical and engineering geological conditions of soil and rock are dramatically different, proposing a suitable conditioning design for earth pressure balance (EPB) hard rock TBMs requires particular attention to the characteristics of the excavated material and ground conditions. In this paper, foam application providing a favourable support medium for EPB hard r

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Paglia, C., and M. Paderi. "Properties and durability of concrete added with recycled polypropylene/polyethylene-based food packaging waste material." Journal of Physics: Conference Series 2521, no. 1 (2023): 012004. http://dx.doi.org/10.1088/1742-6596/2521/1/012004.

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Abstract The plastic waste from food packaging is hard to be recycled. Different material composition of the polymers makes the mixing impossible. Therefore, the possibility of adding selected Polypropylene / Polyethylene - based materials (PP / PE) in concrete for building applications may be a solution to reduce the waste management. In this study, investigations were carried out on the compressive and flexural strength, the elastic modulus, the density, the workability, the porosity and the water permeability. The durability parameters, such as the freeze/thaw resistance and the accelerated

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Kacewicz, Marek. "On the problem of fuzzy searching for hard workability rocks in open-pit mine exploitation." Mathematical Geology 21, no. 3 (1989): 309–18. http://dx.doi.org/10.1007/bf00893692.

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7

Ivanova, T. N., Ivan Zajačko, Miroslav Císar, and A. I. Korshunov. "Research on Workability of Tool Cutters Working under Conditions of Shockless Loads and Friction." Materials Science Forum 994 (May 2020): 19–27. http://dx.doi.org/10.4028/www.scientific.net/msf.994.19.

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The paper deals with hard cutters of drill bits for drilling rocks. The research on geometry of hard alloy and steel cutters of bits that work either under conditions of shockless loads was carried out in this work. The rationale of tungsten carbide and cobalt composition according to their hardness and robustness is provided. Different alloys were suggested to be used for tools working either under conditions of shockless loads or under shock loads for drilling rocks of high hardness. The rock deformation process was identified to occur by cutting and shearing forces. The highest influence on

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Pandey, Rohit, and Rahul Sharma. "Influence of Fresh Concrete Properties on the Mechanical Properties of Hardened Concrete." International Journal for Research in Applied Science and Engineering Technology 11, no. 5 (2023): 1771–74. http://dx.doi.org/10.22214/ijraset.2023.51801.

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Abstract: Characteristics of hard concrete such as compressive strength are significantly affected by freshly prepared concrete properties. The properties of fresh concrete affect the future performance of structures. Compressive strength is found to be major parameter indicating condition of any concrete structures. In this work affect of basic properties such ratio of cement to aggregate; water to cement ratio, workability and density of fresh concrete on the compressive strength is evaluated and a regression model is developed.

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Karem, Saja T. Abd Al, and Ali K. Al-Asadi. "Impact of Various Types of Fibres on the Mechanical Properties of Lightweight Concrete." Civil and Environmental Engineering 20, no. 2 (2024): 1255–66. https://doi.org/10.2478/cee-2024-0091.

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Abstract Impact of various types of fibres on the Mechanical propertes of Lightweght Concrete. This research aims to study the effect of adding fibers on the fresh, and hard propertes of light concrete. To achieving this goal, 13 mixtures were examined, containing different types and proportions of fiber, where the precipitation was examined, as well as the compressive strength, the splitting strength, the fracture modulus, in addition to the workability . The basic variables for this research. The type of fibre, where four types of fibre (steel hooked end, crimped steel, glass, and polypropyl

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Sunarno, Yohans, Natsir Abduh, Eka Yuniarto, Miswar Tumpu, and Lisa Oksri Nelfia. "Application of Carbon Nanotube (CNT) to Improve Mechanical Properties of Concrete: A Comparative Analysis with Superplasticizer." Journal of Geoscience, Engineering, Environment, and Technology 10, no. 1 (2025): 91–96. https://doi.org/10.25299/jgeet.2025.10.1.19526.

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Many researchers' interest in carbon nanotube (CNT) materials has grown as a result of their potential use in the construction industry. This is mostly related to the mechanical, electrical, thermal, kinetic, and chemical properties of CNT, which have a big impact on the way concrete functions. Hydrated calcium silicate is a complex network of binding particles that compose the cement composite material known as concrete. Since it has nanoscale features, CNT will interact most strongly with hydrated calcium silicate, improving the concrete's mechanical qualities. The purpose of this study is t

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Jung, Hyo Jun, Young Jun Bang, and Seung Oh Lee. "Numerical simulation for increasing the sand mastic adaptation of repairing the breakwater." Korea Society of Coastal Disaster Prevention 8, no. 4 (2021): 287–95. http://dx.doi.org/10.20481/kscdp.2021.8.4.287.

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As a breakwater gradually becomes obsolete, it becomes vulnerable to loss of its original functions and finally occurs corruption due to cavitation, scours inside, etc. The mortar grouting method, which has been in general applied in many cases, would invoke serious issues such as coastal environmental pollutions because of spilled-out cement before curing on the near sea. Thus, the sand mastic that utilizes the mastic asphalt becomes focused on as a substitute. However, the related study is hard to find in the domestic literature. In this study, therefore, the workability of sand mastic when

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Ion, Ioana, José Barroso Aguiar, Nicolae Angelescu, and Darius Stanciu. "Properties of Polymer Modified Concrete in Fresh and Hardened State." Advanced Materials Research 687 (April 2013): 204–12. http://dx.doi.org/10.4028/www.scientific.net/amr.687.204.

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It was carried out a study on the properties of polymer modified concrete (PCM) in fresh and hardened state. It was used three types of polymers: epoxy resins, polyurethane and methylcellulose in different percentages and different water cement ratio. The main objectives was to improve workability and rheological behavior of these mixtures in fresh state and mechanical strength tests on hard concrete. Has been investigated the polymer influence on compression strength and flexural strength and analyzing the time evolution of these strengths and participation of polymer in the microstructure fo

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Chen, Qun. "Analysis of Influence Rules of Material Composition on Compaction Characteristic of Asphalt Mixtures Using SGC Tests." Advanced Materials Research 152-153 (October 2010): 1289–92. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.1289.

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Through analysis of densification curve characteristic of gyratory compaction, influence rules of the content of mineral aggregates of all sizes and asphalt on compaction characteristic of mixtures were studied. Test studies show that the mixture having more of asphalt has a faster density-increasing speed, that there is an optimal amount of fine aggregates for optimal compaction, and that an appropriate amount of mineral powder will improve workability of mixtures but overmuch mineral powder will make mixtures dry and hard. Conclusions from this research can provide basis for how to adjust ma

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Kawahara, Kohji. "Application of High-Damping Alloy M2052." Key Engineering Materials 319 (September 2006): 217–24. http://dx.doi.org/10.4028/www.scientific.net/kem.319.217.

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Although the high damping alloy M2052, which has been developed 10 years go, possesses both of very high damping capacity and excellent workability, it has been used only in the field of an audio/video field. If this alloy will be produced by combining high-quality raw material and optimum manufacturing processes, the damping capacity of 0.72 in logarithmic decrement that is near to that of rubber can be yielded. In addition, since workability is very excellent, the sizes and shapes of parts required for anti-vibration measures can be easily supplied, thus being able to satisfy to create all s

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Dinesh., A* Harini.S Jasmine Jeba.P Jincy.J Shagufta Javed. "EXPERIMENTAL STUDY ON SELF COMPACTING CONCRETE." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 3 (2017): 42–50. https://doi.org/10.5281/zenodo.345692.

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Concrete is a mixture of cement, sand, gravel and water which dries hard and strong and is used as a material for building. Concrete has to be heavily vibrated for flow into very intricate forms or forms that have a lot of reinforcing bars. Hence to overcome these defects the self-compacting concrete is used. Self-compacting concrete is a flowing concrete mixture that is able to consolidate under its own weight. The self-compacting concrete flows easily at suitable speed into formwork without blocking through the reinforcement without being heavily vibrated. This project deals with the self- c

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Song, Wen, Donghun Kang, Jie Zhang, Zhiguang Cao, and Hui Xi. "A Sampling Approach for Proactive Project Scheduling under Generalized Time-dependent Workability Uncertainty." Journal of Artificial Intelligence Research 64 (February 25, 2019): 385–427. http://dx.doi.org/10.1613/jair.1.11369.

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   In real-world project scheduling applications, activity durations are often uncertain. Proactive scheduling can effectively cope with the duration uncertainties, by generating robust baseline solutions according to a priori stochastic knowledge. However, most of the existing proactive approaches assume that the duration uncertainty of an activity is not related to its scheduled start time, which may not hold in many real-world scenarios. In this paper, we relax this assumption by allowing the duration uncertainty to be time-dependent, which is caused by the uncertainty of

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17

Balde, Mamadou Yaya, Chantale Njiomou Djangang, Souleymane Balde, Eric Severin Simo Bakam, and Philippe Blanchart. "Physicomechanical Properties of Mortars Based On Ordinary Portland Cement with Bauxite as Mineral Additives." European Journal of Advanced Chemistry Research 3, no. 3 (2022): 1–12. http://dx.doi.org/10.24018/ejchem.2022.3.3.105.

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Guinea has one of the world's main reserves of bauxite that can be used as an industrial mineral to produce low-cost building materials and other parts to address the housing and industrial development difficulties in this country. In this line, mortars were manufactured by replacing 5–25 wt.% of Portland cement with raw and 600 °C calcined. Workability and setting time of fresh mortars were measured. Hard products were characterized by linear shrinkage, porosity, and structural and microstructural investigations. The two mineral additives are chemically active since they favored the reduction

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18

Ma, Xiang, Zhen Leng, Lili Wang, and Peisheng Zhou. "Effect of Reclaimed Asphalt Pavement Heating Temperature on the Compactability of Recycled Hot Mix Asphalt." Materials 13, no. 16 (2020): 3621. http://dx.doi.org/10.3390/ma13163621.

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The compactability of an asphalt mixture is related to the heating temperature of the materials, but the heating temperature of reclaimed asphalt pavement (RAP) is limited by the production process of hot-in-plant recycled mixtures. To choose a reasonable heating temperature for RAP according to the compactability, the compaction energy ratio (CER) obtained from the Superpave gyratory compactor compaction curve was developed. The CERs of fourteen kinds of asphalt mixtures made with different RAPs were compared, all of which were different in type, content, and heating temperature. The results

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Qorllari, Anxhelina, and Thomas A. Bier. "A multi‐DOE approach to investigate the effect of different factors on the properties of ternary binders." ce/papers 6, no. 6 (2023): 225–32. http://dx.doi.org/10.1002/cepa.2944.

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AbstractThe Design of Experiment (DOE) is a widely recognized approach to designing and analyzing experiments. It is a statistical method utilized to simultaneously examine the impact of multiple factors on the results. In this study, two different DOE methods, including mixture and factorial design were employed to evaluate the influence of various factors on the performance of ternary binders. To assess the effect of each component such as Portland cement (PC), calcium aluminate cement (CAC) and sulphate (CŜHx) on the workability and strength of ternary binders, mixture design was utilized.

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Shivakumara, T., M. Patil Rajshekhar, and B. Patil Shantakumar. "Self-Conceptualization and Multi Privileged Algorithm based Controller." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 4 (2020): 1715–20. https://doi.org/10.35940/ijeat.D7557.049420.

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The paper proposes to reduce the workspace, provide users to work on multiple applications in a single domain, provide the security for associates and the privileged people by giving a single sign on authentication. It is very complicated to oversee various factors related as far as bigger associative working. It is very hard to keep up with various kinds of workability on the individual dimension. We are using AES and DES algorithm for the authentication purpose. The design is based on established technical specifications that have been taken for multi domain working, add the technological va

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Riyandi, Ridho. "LEVEL OF WORKABILITY AND MECHANICAL BEHAVIOR OF FLOW CONCRETE WITH FLY ASH UTILIZATION WITH VISCOCRETE 1050 HE." CERUCUK 8, no. 1 (2024): 39. https://doi.org/10.20527/crc.v8i1.13375.

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The flowability of concrete is one of the problems that are often found in the construction world. Therefore, flow concrete can produce homogeneous mortar and can flow into dense repeating areas. The flow concrete in this study used fly ash derived from the acid-acid power plant. Fly ash is waste from coal that has pozzolan properties. Fly ash is more environmentally friendly than cement. To add flexibility to the concrete, a superplasticizer in the form of viscocrete 1050 HE was added. The requirement for the slump test on flow concrete is 19 cm.This study was conducted using a cylinder test

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Kumar Hindu, Aneel, Tauha Hussain Ali, and Agha Faisal Habib. "Effect of length of steel fibers of waste tires on splitting tensile strength of concrete." MATEC Web of Conferences 276 (2019): 01003. http://dx.doi.org/10.1051/matecconf/201927601003.

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The increase in volume of vehicles ultimately increases the number of waste tires. The proper disposal or reutilization of waste tires is a challenge. This study is aimed to utilize the steel fibers of waste tires as reinforcement in concrete. Concrete cylinders were cast with addition of different percentages of steel fibers (0-2%) and length (10-20 mm). The fresh and hard properties of concrete reinforced with different percentages of steel fibers and lengths were observed. It is seen that splitting tensile strength of concrete increased with increase in the length of fiber and with the incr

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Gimenez-Carbo, Ester, Raquel Torres, Hugo Coll, Marta Roig-Flores, Pedro Serna, and Lourdes Soriano. "Preliminary Study of the Fresh and Hard Properties of UHPC That Is Used to Produce 3D Printed Mortar." Materials 15, no. 8 (2022): 2750. http://dx.doi.org/10.3390/ma15082750.

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Three-dimensional printed concrete (3DPC) is a relatively recent technology that may be very important in changing the traditional construction industry. The principal advantages of its use are more rapid construction, lower production costs, and less residues, among others. The choice of raw materials to obtain adequate behavior is more critical than for traditional concrete. In the present paper a mixture of cement, silica fume, superplasticizer, setting accelerator, filler materials, and aggregates was studied to obtain a 3DPC with high resistance at short curing times. When the optimal mix

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Hamada, Lubna K., Zainab Ziad Ismail, and Anita Závodská. "Sustainable utilization of mixed healthcare waste as aggregate in lightweight concrete mixes: mechanical behavior, water absorption and leaching studies." Journal of Science and Technology in Civil Engineering (STCE) - HUCE 17, no. 3 (2023): 33–45. http://dx.doi.org/10.31814/stce.huce2023-17(3)-03.

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Wastes generated from healthcare practices are a serious problem for humans as well as for the environment. In this study, an attempt was made to use mixed solid medical waste (WPN) which consisted of shredded waste plastic and chopped waste needles for partial replacement of natural fine aggregate (sand) in concrete mixes at 0%, 2%, 4%, 6%, 8% and 10% by weight. To examine the validity of the suggested approach, the fundamental concrete properties including workability, fresh and hard densities, water absorption, compressive strength, and flexural strength as well as a leaching test were perf

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Kawalec, M., and J. Kozana. "Effect of Microstructure of Fe-C-V Alloys on Selected Functional Properties." Archives of Foundry Engineering 14, no. 3 (2014): 33–36. http://dx.doi.org/10.2478/afe-2014-0057.

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Abstract The cast alloys crystallizing in Fe-C-V system are classified as white cast iron, because all the carbon is bound in vanadium carbides. High vanadium cast iron has a very high abrasion resistance due to hard VC vanadium carbides. However, as opposed to ordinary white cast iron, this material can be treated using conventional machining tools. This article contains the results of the group of Fe-C-V alloys of various microstructure which are been tested metallographic, mechanical using an INSTRON machine and machinability with the method of drilling. The study shows that controlling the

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Brzychczy, Edyta, Marek Kęsek, Aneta Napieraj, and Marta Sukiennik. "The Use of Fuzzy Systems in the Designing of Mining Process in Hard Coal Mines." Archives of Mining Sciences 59, no. 3 (2014): 741–60. http://dx.doi.org/10.2478/amsc-2014-0052.

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Abstract This article presents examples of solutions supporting the design of certain elements of the mining process in coal mines. The focus is on two fuzzy systems: the first supports the selection of equipment for longwall faces (FSES); and the second supports the estimation of production results (FSOE). System FSES generates proposals for equipment in designed longwall faces. The module of fuzzing in this system enables a fuzzing operation for the following quantitative variables: longwall length; longwall height; longitudinal and crosswise incline of the longwall, workability of the coal

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Terehov, Maksim, Dmitriy Sevost'yanov, and Lyudmila Filippova. "PECULIARITIES IN TUNGSTEN ALLOY PARTS PROCESSING FOR OIL-GAS INDUSTRY." Bulletin of Bryansk state technical university 2021, no. 1 (2021): 10–18. http://dx.doi.org/10.30987/1999-8775-2021-1-10-18.

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The purpose of the work carried out is to increase the effectiveness of hard alloy machining. Within the limits of the paper there is solved a matter of electro-erosion treatment and turning TC 3 alloy parts. Basic investigation methods are: - experiment and comparison, - computer simulation  The work resulted in recommendations for the choice of cutters and cutting modes for hard alloy edge machining and also electrode material at electro-erosion treatment.  One of the ways to increase productivity and operation quality equipment consists in the application of new mate

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Terehov, Maksim, Dmitriy Sevost'yanov, and Lyudmila Filippova. "PECULIARITIES IN TUNGSTEN ALLOY PARTS PROCESSING FOR OIL-GAS INDUSTRY." Bulletin of Bryansk state technical university 2021, no. 1 (2021): 10–18. http://dx.doi.org/10.30987/1999-8775-2021-1-10-18.

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The purpose of the work carried out is to increase the effectiveness of hard alloy machining. Within the limits of the paper there is solved a matter of electro-erosion treatment and turning TC 3 alloy parts. Basic investigation methods are: - experiment and comparison, - computer simulation  The work resulted in recommendations for the choice of cutters and cutting modes for hard alloy edge machining and also electrode material at electro-erosion treatment.  One of the ways to increase productivity and operation quality equipment consists in the application of new mate

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Parwez, Alam, Yadav Saurav, kumar Jaiswal Shivam, Prakash Shankar, and Saxena Atul. "A Study on Plastic Waste for Replacement of Coarse Aggregate with Soft and Hard Plastic in Concrete." International Journal of Innovative Science and Research Technology 7, no. 5 (2022): 50–52. https://doi.org/10.5281/zenodo.6571255.

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As the today in the fastest growing word the construction around the world is on the peak and as we know that in building construction concrete is the main constituent apart from that in today time. the plastic waste is one of the most dangerous pollutant for environment because to degrade plastic take throughout of the year. the idea behind this reachers is to overcome these plastic waste with the construction material in order to overcome the environmental problem that the word are facing .this paper aim to review the using to this plastic with replacement of course and fine aggregate and it

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Artamonov, E. V., D. V. Vasil'yev, and M. O. Chernyshov. "Chip Breaking During Automated Processing by Cutting Hard-to-Work Steels by Integrated Use of Chip Breaking Tools and High-Temperature Embrittlement." Proceedings of the Southwest State University 24, no. 1 (2020): 8–22. http://dx.doi.org/10.21869/2223-1560-2020-24-1-8-22.

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Purpose of research is to increase productivity when cutting hard-to-work steels by integrated use of chip breaking tool geometry and cutting modes, which reduce the viscous properties of the chips and the processed material. The article discusses the problems of mechanical processing of parts of oil production equipment at enterprises in Western Siberia. It is presented the main condition for ensuring chip crushing and revealed the problem of low efficiency of existing methods in modern industry, to one degree or another guiding, curling and chip-cutting method.Methods. Simulation modeling, c

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Ogbodo, Munachiso C., and Akpabot Ifiok Akpabot. "Effect of Detergent on Concrete prepared with Periwinkle shell as Coarse Aggregate." Materials Science Forum 1034 (June 15, 2021): 179–86. http://dx.doi.org/10.4028/www.scientific.net/msf.1034.179.

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The use of the periwinkle shell in the production of lightweight concrete has been studied and accepted to be used for concrete works. Hard water containing detergent-like chemicals has been observed to be used in mixing locally produced concrete. This exploratory study is on the effect of water mixed with detergent in a concrete prepared with the periwinkle shell as a coarse aggregate. A total of 27 concrete cubes of size 150mmx150mmx150mm were prepared in the laboratory with a mix ratio of 1:2:4. A water-cement ratio of 0.4 was used with the addition of detergent at varying percentages (0%,

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Hayu, Gati Annisa. "Pengaruh Campuran Polyethylene Terephthalate Terhadap Kuat Tekan Beton Mampat Sendiri (The Effect of Polyethylene Terephthalate to Compressive Strenght of Self Compacting Concrete)." Jurnal Rekayasa Sipil dan Lingkungan 1, no. 01 (2016): 96. http://dx.doi.org/10.19184/jrsl.v1i01.3748.

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AbstractSelf compacting concrete is a type of concrete that has a good workability, so it can perform compression itself without using any vibrators. Polyethylene Therephthalte (PET) is a waste that is often found in plastic bottle packaging. The existence of these problems urged many researchers to find solutions to reduce this PET plastic waste. The purpose of this study is to utilize PET as subtitution of fine agregate to produce self compacting concrete. Beside of that, this study uses 1% of Viscocrete. The composistion of PET are 0%, 5%, dan 15%. The specimen size is 15 x 30 cm. The testi

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Luppold, William, John Baumgras, and George Barrett. "Utilization of the Eastern Hardwood Resource by the Hardwood Sawmilling Industry." Northern Journal of Applied Forestry 18, no. 2 (2001): 37–41. http://dx.doi.org/10.1093/njaf/18.2.37.

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Abstract The eastern hardwood resource contains numerous species that differ in grain, color, texture, and workability. Because the value of hardwoods is derived from appearance, these variations in physical attributes can cause the price for identical grades of hardwood lumber to vary by as much as 600% between species. As a result, there is incentive for primary processors to harvest certain species more intensively than others, which could affect long-term forest composition. This article introduces the concept of relative utilization to augment the infrequently published annualized growth-

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Chen, Qun, and Yuzhi Li. "SGC Tests for Influence of Material Composition on Compaction Characteristic of Asphalt Mixtures." Scientific World Journal 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/735640.

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Compaction characteristic of the surface layer asphalt mixture (13-type gradation mixture) was studied using Superpave gyratory compactor (SGC) simulative compaction tests. Based on analysis of densification curve of gyratory compaction, influence rules of the contents of mineral aggregates of all sizes and asphalt on compaction characteristic of asphalt mixtures were obtained. SGC Tests show that, for the mixture with a bigger content of asphalt, its density increases faster, that there is an optimal amount of fine aggregates for optimal compaction and that an appropriate amount of mineral po

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Bagaiskov, Yu. "Modeling of Gear-Hone Teeth with Consideration of Elasticity, Correction, and Operational Wear." Key Engineering Materials 910 (February 15, 2022): 30–35. http://dx.doi.org/10.4028/p-01e1n2.

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Gear hones are used as tools for gear honing. The efficiency of using gear hones mainly depends on the parameters of their compound material, first of all on the wear resistance and elasticity modulus. In terms of the elasticity modulus, gear hones can be hard and elastic, depending on the bonding agent type. Experience shows that gear-hone teeth distort during gear honing; they feature contact and flexural deformation and wear during metal removal, including along the tooth space. For this reason, it is necessary to consider the deformation and wear values for designing of gear hone geometry.

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Rustam, Karimov Jaxongir ugli, and Karimjon Quranboevich Polotov. "IMPROVE THE EFFICIENCY OF TURNING LIGHT ALLOYS." EURASIAN JOURNAL OF MATHEMATICAL THEORY AND COMPUTER SCIENCES 1, no. 3 (2021): 26–30. https://doi.org/10.5281/zenodo.5716269.

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the article deals with modern methods of improving the efficiency of processing light alloys based on the method of high-speed cutting, which occupies a leading place in the field of improving the performance of technological systems

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Cheluszka, Piotr. "Numerical Studies of the Dynamics of the Roadheader Equipped with an Automatic Control System during Cutting of Rocks with Different Mechanical Properties." Energies 14, no. 21 (2021): 7353. http://dx.doi.org/10.3390/en14217353.

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The process of cutting rocks with a boom-type roadheader results in extreme dynamic loads and vibrations. Mining, especially in the case of hard rocks, is associated with large energy consumption, which, when combined with low process efficiency, can lead to low drilling performance. These phenomena are undesirable because excessive dynamic load leads to low machine durability, as well as deterioration of work conditions and safety. Low mining efficiency affects the economics of mining works conducted using roadheaders. However, these adverse effects can be minimized by optimizing the cutting

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Singh, Amandeep, and Sourabh Lalotra. "To Study the Partial Replacement of Cement by Eggshell, Chalk Powder with Addition of Basalt Fiber." International Journal for Research in Applied Science and Engineering Technology 11, no. 12 (2023): 2064–71. http://dx.doi.org/10.22214/ijraset.2023.57705.

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Abstract: In concrete cement of Portland the aggregate are mixed with water and dry cement, they form a fluid of mass that mould easily into desired shape. The cement chemically react ingredient and water to form a matrix hard which the materials bind together into durable property stone that might use for many purpose. Use of chalk powder is also eco-friendly as the waste limestone or chalk material from industries as well as from schools and colleges, are effectively being used to form quality building materials. Basalt fiber is another solid strengthening material, which has wonderful mecha

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Susilowati, Anni, Pratikto Pratikto, Dennis Yudha Praditya, and Kusno Wijayanto. "KUAT TEKAN SELF COMPACTING CONCRETE MENGGUNAKAN GROUND GRANULATED BLAST FURNACE SLAG." PROKONS Jurusan Teknik Sipil 13, no. 2 (2020): 111. http://dx.doi.org/10.33795/prokons.v13i2.195.

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Self Compacting Concrete (SCC) as one type of concrete that is mostly used in building construction has good workability and can be obtained by adding filler instead of cement. Ground Granulated Blast Furnace Slag (GGBFS) has a chemical composition similar to the content in cement. Therefore, the study of the use of GGBFS was used as a partial substitute for cement in the SCC to examine the influences and quality of GGBFS on fresh concrete and to obtain SCC with the best compressive strength. This research method uses an experimental method by making SCC concrete specimens with an initial fas

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Khan, M. Arsalan, M. Khalid Imam, Kashif Irshad, Hafiz Muhammad Ali, Mohd Abul Hasan, and Saiful Islam. "Comparative Overview of the Performance of Cementitious and Non-Cementitious Nanomaterials in Mortar at Normal and Elevated Temperatures." Nanomaterials 11, no. 4 (2021): 911. http://dx.doi.org/10.3390/nano11040911.

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Nanotechnology has emerged as a field with promising applications in building materials. Nanotechnology-based mortars are examples of such building materials that have widespread applications in the construction industry. The main nanomaterials used in mortars include nano-silica, nano-magnesium oxide, nano-alumina, nano-titanium oxide, nano-zinc oxide, nano-clay, and nano-carbon. This review paper presents a summary of the properties and effects of these nanomaterials on cement mortar in terms of its fresh-state and hard-state properties. The fresh-state properties include the setting time, c

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Timofeeva, Larisa, Sergey Timofeev, Liudmyla Voloshyna, and Maksym Kolesnyk. "Increasing the tribological properties of the sur-face layer of cast iron by treatment in the envi-ronment of overheated steam of aqueous solution." Bulletin of Kharkov National Automobile and Highway University, no. 94 (December 16, 2021): 123. http://dx.doi.org/10.30977/bul.2219-5548.2021.94.0.123.

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The formation of the surface layer of cast iron during the processing of cast iron in the environment of superheated steam of an aqueous solution of salts is considered. An ecologically cleaner method of chemical-thermal treatment is offered. The article considers the surface layer obtained in the environment of superheated steam of an aqueous solution of water-soluble salts of ammonium molybdic acid. The layer is formed on the surface of the matrix and around the graphite inclusions. The impact of temperature on the formation of a multilayer coating by increasing the temperature in contact wi

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Gokce, Harun. "Optimisation of Cutting Tool and Cutting Parameters in Face Milling of Custom 450 through the Taguchi Method." Advances in Materials Science and Engineering 2019 (September 19, 2019): 1–10. http://dx.doi.org/10.1155/2019/5868132.

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Stainless steels with unique corrosion resistance are used in applications with a wide range of fields, especially in the medical, food, and chemical sectors, to maritime and nuclear power plants. The low heat conduction coefficient and the high mechanical properties make the workability of stainless steel materials difficult and cause these materials to be in the class of hard-to-process materials. In this study, suitable cutting tools and cutting parameters were determined by the Taguchi method taking surface roughness and cutting tool wear into milling of Custom 450 martensitic stainless st

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Demirpolat, Ahmet Beyzade, and Ercan Aydoğmuş. "Development of Composite Materials from Phenol Formaldehyde Resins and Evaluation of Their Uses." International Journal of Advanced Natural Sciences and Engineering Researches 7, no. 4 (2023): 158–62. http://dx.doi.org/10.59287/ijanser.643.

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In this study, the properties, application areas, and use of phenol formaldehyde resins in composite materials have been investigated. The usage areas of phenol formaldehyde resins are getting more and more widespread. Composite materials are being developed by using them together with fibrous biomass sources. Besides, industrial wastes or inorganic fillers are also supplemented with phenol formaldehyde resin. While phenol formaldehyde-based composites are produced, wastes causing environmental pollution are evaluated and some properties of the composites are improved according to the purpose

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Yıldırım, Çağrı. "Effect of Nanofluid on Cutting Temperature in Turning of Inconel 625 with Ceramic Tools." Academic Perspective Procedia 2, no. 3 (2019): 370–80. http://dx.doi.org/10.33793/acperpro.02.03.10.

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Inconel 625 is used extensively in critical parts of aircraft, especially gas turbine engines. However, the high strength, which is one of the reasons of choice, considerably reduces the workability of this material. In such a case, the most preferred method is the use of cutting fluid. On the other hand, the fact that conventional cutting fluids adversely affect the environment, worker health and production costs concerns the enterprises. Recently, researchers and businesses have been working hard to reduce the amount of coolant without reducing production efficiency. In this study, some cool

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Odehnal, Josef, Tomáš Studecký, Petra Čejková, et al. "Aspects of Bending High-Borated Austenitic Stainless Steel Sheets for Interim Storage of Spent Nuclear Fuel." Metals 13, no. 2 (2023): 348. http://dx.doi.org/10.3390/met13020348.

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The presented work is aimed at the evaluation of the cold bending capacity of high-borated austenitic stainless steel sheets. Due to their excellent neutron-absorbing capability, borated stainless steels belong to the group of tailor-made structural materials widely used for vertical storage baskets for holding spent nuclear fuel assemblies in cooling pools at dry or wet storage facilities. The basket consists of individual fuel assembly cells. Each polygonal cell is usually welded from several steel strips. It would be advantageous to use bent steel semi-product to avoid welded seams as much

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Gupta, Shubham. "Study on Stabilization of Expansive Soil Using Fly Ash and Lime." International Journal for Research in Applied Science and Engineering Technology 13, no. 4 (2025): 5389–98. https://doi.org/10.22214/ijraset.2025.69618.

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Abstract: Expansive soil covers over 51.8 million hectares of land area in India (mainly Black Cotton soil). The basic trait of these expansive soils is that they are highly hard while dry but lose all of their strength when wet. Because of this attribute of expansive soils, these soils provide issues all around the world that geotechnical engineers must address. Soil stabilization, which is frequently utilised in foundation and road pavement constructions, is one of the most significant features for construction purposes; this is because such a stabilization regime increases engineering quali

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Al-Baldawi, Maryam Firas, Farah Nora Aznieta Abdul Aziz, Norsuzailina Mohamed Sutan, et al. "Fresh and Hardened Properties of Different Percentages of Hybrid Kenaf-Glass Fibres Reinforced Geopolymer Concrete under Ambient Curing Condition." Journal of Advanced Research in Applied Mechanics 135, no. 1 (2025): 206–18. https://doi.org/10.37934/aram.135.1.206218.

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Geopolymer concrete (GPC) has become one of the alternative green materials to normal concrete due to its inherent advantages in minimizing carbon emissions for a sustainable environment. However, geopolymers have a brittle nature, hence integration of hybrid fibres in geopolymer concrete enhances its strength and ductility, mitigating fracture propagation. In this research, two types of fibres namely kenaf (KF) and glass fibres (GF) are hybrid to 1% of the total volume fraction added in fly Ash and GGBFS-based geopolymer concrete known as hybrid fibre-reinforced geopolymer concrete (HFGPC) wi

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Kumar, M. Pranay, and Mrs G. Sai Sruthi. "Investigation Report on Characteristics Strength Partial Replacement of Fine Aggregate with Copper Slag and Granite Powder." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 12 (2024): 1–2. https://doi.org/10.55041/ijsrem39365.

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Concrete is one of the most widely used construction materials, consisting of cement, fine aggregates, coarse aggregates, and water. Traditionally, Ordinary Portland Cement (OPC), river sand, and Hard Broken Granite (HBG) stone are used in concrete production. However, the over-extraction of these natural resources has led to environmental concerns and increased costs. This has created a need for sustainable alternatives that maintain concrete’s quality and performance. This study investigates the partial replacement of fine aggregates with copper slag and granite powder in M25 grade concrete.

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Bhoir, Dhanashree, Chirag Patil, Priyanka Misal, Vihar Mithbavkar, and Soniya Kadam. "An Experimental Study on Self Compacting Concrete." International Journal of Science and Social Science Research 2, no. 1 (2024): 91–98. https://doi.org/10.5281/zenodo.13334858.

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Concrete occupies unique position among the modern construction materials, Concrete is a material used in buildingconstruction, consisting of a hard, chemically inert particulate substance, known as a aggregate(usually made for different typesof sand and gravel), that is bond by cement and water. This paper gives a review on Self Compacting Concrete (SCC) to bemade using various Mineral Admixtures and Fibers. When large quantity of heavy reinforcement needs is to be placed inreinforced concrete (RC) member, it is difficult ensure fully compacted without voids or honeycombs. Compaction by manua

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Buzunov, Nikolai V., Vyacheslav V. Ivanenkov, Roman D. Pirozhkov, Boris B. Kositsyn, and Georgy O. Kotiev. "The method of development of the electronic control system for curvilinear motion of a high-speed tracked vehicle with dual-flow transmission." Tractors and Agricultural Machinery 90, no. 2 (2023): 133–47. http://dx.doi.org/10.17816/0321-4443-312191.

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BACKGROUND: Handling and safety requirements to high-speed tracked vehicles (HSTV) rise in tandem with the growth of average motion velocities. The issue of ensuring continuously variable turn radius at curvilinear motion is relevant for HSTVs. Current layouts of steering mechanisms are able to meet this requirement, however they have certain disadvantages and are not compatible with electronic systems improving motion safety and lowering demands to mechanic-drivers skills. AIMS: The synthesis of control laws for dual-flow transmission with a hydrostatic steering mechanism (HSSM) control

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