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Journal articles on the topic 'Temperature Retarder'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Petriashvili, Gia, Andro Chanishvili, Nino Ponjavidze, et al. "Crystal Smectic G Phase Retarder for the Real-Time Spatial-Temporal Modulation of Optical Information." Chemistry & Chemical Technology 17, no. 4 (2023): 758–65. http://dx.doi.org/10.23939/chcht17.04.758.

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We have manufactured and investigated a novel phase retarder based on a rare and less studied liquid crystal phase, such as the Crystal Smectic G-phase prepared by mixing two certified nematic mixtures. The phase retarder is transparent in the visible and near-infrared parts of the optical spectrum. The temperature stability over a wide temperature range, high birefringence, and high strength, allow the production of various types of phase retarders that can be used in optics, optical chemical analysis,and polarimetry.

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2

Liu, Cheng Ye, and Jian Ming Shen. "Design Technologies of Eddy Current Retarder Used in an Automobile." Applied Mechanics and Materials 251 (December 2012): 134–38. http://dx.doi.org/10.4028/www.scientific.net/amm.251.134.

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Auxiliary brake sets had been widely used for heavy duty trucks and advanced buses. They played a role of split-flow braking load of main brake system. As one of auxiliary brake sets eddy current retarder had good braking performance and braking stability, and it is automotive and maintain constant speed by its continual braking. In this paper, key technologies of eddy current retarder, such as braking torque, working volt and current, magnetic circuit, material of rotor plate and iron, heat dissipation performance of rotor plate, match between eddy current retarded and automobile, and effect

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3

Wu, Chao, Zhen Chuan Song, Shou Sheng Tang, and Wei Gang Shan. "The Experimental Study of Unload on Temperature Characteristics of Hydraulic Retarder." Applied Mechanics and Materials 620 (August 2014): 255–61. http://dx.doi.org/10.4028/www.scientific.net/amm.620.255.

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The experimental study of unload on temperature characteristics is put up for heavy vehicle hydraulic retarder, forms the retarder unload testing method of temperature characteristics, confirms the relationship between the temperature of hydraulic retarder inner cavity and unload torquecavity air density, which can be used to instruct the simulation of retarder inside flow field in unload condition and actualize method to reduce air losing, and it lays the foundation for developing mechanism research to reduce air losing of retarder.

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4

Koo, Kyung Mo, Gyu Yong Kim, Hiroyuki Miyauchi, and Yeon Woo Kang. "Properties of Autogenous Shrinkage in High-Strength Mass Concrete According to Hydration Heat Velocity." Advanced Materials Research 311-313 (August 2011): 1993–99. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1993.

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The early-age properties and relationships between hydration heat and autogenous shrinkage in high-strength mass concrete are investigated through analysis of the history curves of hydration heat and autogenous shrinkage. To reduce the hydration heat velocity, micro encapsulated retarder (MR) that could retard cement reaction was applied. In the result of research, the hydration temperature and hydration heat velocity of high-strength mass concrete can be decreased with the reduction of size specimen and use of the retarder. A close relationship could be found between the hydration temperature

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5

Yuan, Zhe, Wen Xing Ma, Wei Cai, Li Dan Fan, and Jian Jun Song. "Temperature Field Analysis on the Hydrodynamic Retarder of Heavy Vehicle." Advanced Materials Research 503-504 (April 2012): 1025–28. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.1025.

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According to the working characteristics of the hydrodynamic retarder, the hydrodynamic retarder D300 is chosen in this research. Based on three-dimensional flow theory, the internal temperature fields of hydrodynamic retarder with different liquid-filled ratios of 100%, 75%, 50%, 25% are numerically simulated. The standard k-ε model is chosen as turbulent model for calculation. The SIMPLEC algorithm is chosen as velocity-pressure coupling algorithm and the second order upwind scheme is used as discrete method. The mixture multiphase model is used to calculate the unsteady gas-liquid two-phase

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6

Kovalev, I. S. "MATHEMATICAL AND COMPUTER SIMULATION OF THE COMMERTIAL VEHICLE’S HYDRAULIC RETARDER." Vestnik SibADI 15, no. 3 (2018): 400–411. http://dx.doi.org/10.26518/2071-7296-2018-3-400-411.

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Introduction.The article represents the mathematical model of commercial vehicle’s hydraulic retarder. The model is based on the mathematical model of the variable filling hydraulic dynamometer.Materials and methods.The retarder model was designed with the possibility of its integration with the mathematical model of the engine cooling system. For this purpose, the state function of fluid temperature in a working chamber of the retarder was added to the retarder model. Consequently, fluid compression in the working chamber was included into the model to avoid unlimited filling because of possi

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7

Lu, Ya, Ming Li, Zi Han Guo, and Xiao Yang Guo. "Synthesis and Characterization Performance of a Novel High Temperature Retarder Applied in Long Cementing Interval." Materials Science Forum 847 (March 2016): 479–84. http://dx.doi.org/10.4028/www.scientific.net/msf.847.479.

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In view of the common polymer retarder of AMPS has poor sedimentation stability for slurry in high temperature, and thickening curve for unusual problems, a new terpolymers retarder PSIH which can solve the problem for the large temperature difference was synthesized by free radical aqueous solution copolymerization using styrene sulfonate (SSS), Itaconic acid (IA) and unsaturated hydroxyl ester monomers X . The structure and thermal stability of the copolymer was characterized with gel permeation chromatography (GPC), infrared spectroscopy (IR), and thermal gravimetric analysis (TG). The appl

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8

Huang, Yi Qi, Gan Wei Cai, Yu Jiang, and Zhao Yu Luo. "Method of Genetic Algorithm Optimization Design of Permanent Magnet Retarder." Applied Mechanics and Materials 215-216 (November 2012): 362–67. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.362.

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This paper introduced the method of multidisciplinary design optimization based on genetic algorithm. The basic structure and new auxiliary braking mechanism of permanent magnet retarder was analyzed. The influences of magnetic field parameters, structural design parameters, rotor parameters and permanent magnet temperature parameters on the behaviors performance of the permanent magnet retarder were discussed. The conceptual model of permanent magnet retarder was developed to maximize the brake torque of the permanent magnet retarder. The design variables included the radial width and the axi

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9

Soegiharto, Achmad Fauzan Hery. "The Investigation of Additional Cooling Fan on the Brake System to Overcome the Overheating Issue: A Case Study of Oil Cooler Retarder Brake." Journal of Mechanical Engineering 22, no. 1 (2025): 207–22. https://doi.org/10.24191/jmeche.v22i1.4565.

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The retarder brake is a critical component for articulated trucks, particularly in coal mining, where heavy loads are transported on steep terrains. The primary braking system often proves inadequate under these conditions, making the retarder brake essential. However, overheating in the retarder brake system reduces braking efficiency and increases the risk of mechanical failure. This study investigates the causes of overheating and assesses the effectiveness of adding a fan cooler to the oil retarder brake system. The methodology employed is quantitative observation, where a fan cooler was i

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10

Ikpeka, Princewill Maduabuchi. "Effects of Additive Concentrations on Cement Rheology at Different Temperature Conditions." International Journal of Engineering Works (ISSN: 2409-2770) 06, no. 03 (2019): 50–70. https://doi.org/10.5281/zenodo.2583066.

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Cement slurries are designed to achieve zonal isolation; improve rheological properties and displacement efficiency of cementing system. Oil well cement slurries depend on temperature, additive concentrations; quality and quantity, to contribute to the placement and success of cementing operation. This study aims at analysing the effects of cement slurry additive concentration on rheology at different temperature conditions. Three additive concentrations were varied; Retarder, Fluid Loss Additive and Dispersant. Using full factorial design, 27 experiments were carried out to analyse the effect

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11

Trimurtiningrum, Retno, Bantot Sutriono, Billy Arrowrichta, Hiasintus Bertus Watu, and Misrawi Misrawi. "Pengaruh Bahan Tambah Gula Pasir Terhadap Waktu Pengikatan dan Kuat Tekan." RekaRacana: Jurnal Teknil Sipil 6, no. 1 (2020): 1. http://dx.doi.org/10.26760/rekaracana.v6i1.1.

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ABSTRAKDalam pelaksanaan pembangunan konstruksi beton, seringkali ditemui beberapa kendala, seperti lokasi batching plan yang berbeda dengan lokasi proyek serta tingginya temperatur saat pengecoran, sehingga dapat mempercepat waktu pengikatan beton. Untuk mencegah waktu pengikatan lebih awal, diperlukan bahan tambah kimia yang dapat memperlambat waktu pengikatan yaitu retarder. Akan tetapi, bahan tambah kimia mempunyai harga yang relatif tinggi. Oleh karena itu, pada penelitian ini digunakan gula sebagai bahan tambah alternatif, karena gula merupakan salah satu penyusun dalam komposisi retarde

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12

Wang, Kuiyang, Jinhua Tang, and Guoqing Li. "Research on Parametric Design of Hydraulic Retarder Based on Multi-Field Coupling of Heat, Fluid and Solid." Open Mechanical Engineering Journal 9, no. 1 (2015): 58–64. http://dx.doi.org/10.2174/1874155x01509010058.

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In order to optimize the design method and improve the performance of hydraulic retarder, the numerical simulation of multi-field coupling of heat, fluid and solid is carried out to hydraulic retarder, based on the numerical computation and algorithm of heat-fluid coupling and fluid-solid coupling. The computation models of heat-fluid coupling and fluid-solid coupling of hydraulic retarder are created. The three dimensional model of hydraulic retarder is established based on CATIA software, and the whole flow passage model of hydraulic retarder is extracted on the basis of the three dimensiona

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13

Huang, Yi Qi, Xiao Feng Li, Yuan Chen, and Yu Jiang. "Method of Optimization Design of Permanent Magnet Retarder." Advanced Materials Research 945-949 (June 2014): 1482–85. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.1482.

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This paper introduced the method of multidisciplinary design optimization. The conceptual model of permanent magnet retarder was developed to maximize the brake torque of the permanent magnet retarder. The influences of magnetic field parameters, structural design parameters, rotor parameters and permanent magnet temperature parameters on the behaviors performance of the permanent magnet retarder were discussed. The design variables included the radial width and the axis length of permanent magnet, the number of permanent magnet, the radius of rotor, the thickness of rotor, and the air gas. Th

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14

Ren, Xiao Qiong, Hong Jie Liu, and Xue Song Liang. "Study on Gypsum Retarder from Waste Penicillin Mycelium." Advanced Materials Research 878 (January 2014): 539–44. http://dx.doi.org/10.4028/www.scientific.net/amr.878.539.

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A new kind of gypsum retarder was prepared from waste penicillin mycelium (WPM), a harmful solid waste from pharmaceutical factory. The results indicated that the optimum treatment conditions were pH value 11, temperature 80 °C and treatment time 1.5 h. Compared with sodium citrate and sodium polyphosphate, WPM retarder can effectively prolong the setting time of gypsum with less influence on mechanical strength. The crystal morphology microstructure of gypsum containing retarder was studied with SEM and the reason why the mechanical strength loss of gypsum were also explained in this paper.

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15

Orlovskyi, Vitalii, Volodymyr Biletskyi, and Myroslav Malovanyy. "Research on "Aesculus" Setting Retarder for Grouting Mortars." Chemistry & Chemical Technology 18, no. 4 (2024): 601–14. https://doi.org/10.23939/chcht18.04.601.

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In Ukraine, the number of reagents regulating the properties of tail blends used for cementing deep oil and gas wells has decreased. Therefore, there is a need to expand the range of these reagents produced domestically to replace the known reagent, nitrilotrimethylphosphonic acid, which was produced in russia. The new reagent-retarder for oil-well cement should have a wide temperature range of application, complexity of action, and meet the requirements of environmental safety.

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16

Indirani, Karina, Samuel Martin Pradana, and Wiwiek Eka Mulyani. "PENGARUH KONSENTRASI ASAM ASETAT DAN RETARDER KATIONIK PADA PROSES PENCELUPAN BENANG POLIAKRILAT MENGGUNAKAN ZAT WARNA BASA." Texere 20, no. 2 (2022): 108–17. http://dx.doi.org/10.53298/texere.v20i2.05.

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Pencelupan benang poliakrilat dengan zat warna basa untuk warna muda sampai medium sering mengalami permasalahan diantaranya adalah ketidakrataan dalam pencelupan. Beberapa faktor yang dapat mempengaruhi hasil pencelupan tersebut adalah penggunaan retarder dan kondisi proses seperti suhu dan pH larutan celup. Pada penelitian ini membahas pengaruh variasi konsentrasi asam asetat dan retarder kationik terhadap ketuaan dan kerataan warna yang dihasilkan dalam proses pencelupan. Selain itu untuk menentukan konsentrasi optimum dari penggunaan asam asetat dan retarder kationik pada proses pencelupan

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17

Liao, Yunfei. "Overview of Numerical Analysis and Optimization Methods for Eddy Current Retarders." Academic Journal of Science and Technology 3, no. 2 (2022): 6–9. http://dx.doi.org/10.54097/ajst.v3i2.2079.

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Aiming at the analysis and optimization of eddy current retarder, this paper reviews the development of numerical analysis based on finite element method. The characteristics of finite element method and the application of numerical method in the analysis of eddy current retarder are briefly introduced. In terms of algorithm, the different applications of multi-objective genetic algorithm, robustness principle, Taguchi algorithm and Rogowski method in the analysis of important parameters of eddy current retarder are introduced and summarized; In terms of software, the application of commercial

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18

Qi, Zhigang, Yang Chen, Haibo Yang, Hui Gao, Chenhui Hu, and Qing You. "An NMR Investigation of the Influence of Cation Content in Polymer Ion Retarder on Hydration of Oil Well Cement." Energies 15, no. 23 (2022): 8881. http://dx.doi.org/10.3390/en15238881.

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Low field pulse nuclear magnetic resonance (LF-NMR) was used to analyze the effects of a polymeric ion retarder and the amount of acryloxyethyl trimethylammonium chloride (DMC) in the retarder on the distribution of T2, thickening property, and strength of cement paste. The effect of pressure and temperature on the thickening curve was investigated, and the hydration products were analyzed using XRD. The result shows that the wrapped water of the precipitation is the main reaction aqueous phase of cement slurry in the hydration, with short T2 time and a large relaxation peak area. The retarder

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19

Peng, Zhigang, Chen Chen, Qian Feng, Yong Zheng, Huan Liu, and Chunyang Yu. "Synthesis and characterization of a quaternary copolymer retarder for cementing in a long sealing section with large temperature difference." New Journal of Chemistry 44, no. 9 (2020): 3771–76. http://dx.doi.org/10.1039/c9nj06150a.

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20

Lu, Ya, Ming Li, Zihan Guo, and Xiaoyang Guo. "A novel high temperature retarder applied to a long cementing interval." RSC Advances 6, no. 17 (2016): 14421–26. http://dx.doi.org/10.1039/c5ra24638e.

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A retarder comprised of sodium styrene sulfonate, itaconic acid and hydroxyethyl methacrylate was synthesized by aqueous free radical copolymerization, which can be applied to a long cementing interval.

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21

Zhigang, Peng, Zhang Jian, Feng Qian, et al. "Synthesis and retarder mechanism study of a novel amphoteric composite high temperature-resistant retarder for oil well cement." RSC Advances 8, no. 27 (2018): 14812–22. http://dx.doi.org/10.1039/c8ra01139g.

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An amphoteric composite polymer (hereinafter referred to as PAADM) as high temperature-resistant cement retarder was prepared byin situintercalated polymerization method with AMPS, AA and DMDAAC as monomers, and modified montmorillonite as an active polymerization filler.

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22

Rymoza, Verona Cycilia, Bambang Yudho Suranta, and Arie Heriyana. "EFEKTIFITAS PENAMBAHAN DISPERSANT DAN RETARDER TERHADAP SLURRY PROPERTIES." Prosiding Seminar Nasional Teknologi Energi dan Mineral 4, no. 1 (2025): 964–72. https://doi.org/10.53026/prosidingsntem.v4i1.397.

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Proses penyemenan pada sumur pemboran bertujuan untuk melindungi casing dari masalah masalah mekanis saat proses pemboran berlangsung. Selain itu penyemenan dilakukan untuk menutup kebocoran yang terjadi pada casing, sehingga produksi sumur tetap terjaga. Penggunaan aditif berpenan penting dalam proses penyemenan, karena kualitas bubur semen ditinjau dari komposisi aditif yang digunakan untuk suatu sumur. Penelitian ini dilakukan untuk membuktikan keefektifan penggunaan aditif Dispersant dan Retarder terhadap Viskositas dan Thickening Time. Selanjutnya dilakukan penelitian dengan skala laborat

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23

Rafli Aryansyah, Muhammad, and Dahrul Effendi. "Pengaruh Penambahan Konsentrasi Additive Retarder Pada Cement Class-G Terhadap Thickening Time Untuk Casing 7” Dengan Temperatur 150°F." Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi 5, no. 1 (2025): 87–91. https://doi.org/10.47970/snarstek.v2i1.775.

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Pada kegiatan operasi pemboran migas banyak hal yang harus di perhatikan untuk menunjang kegiatan operasi pemboran salah satunya adalah cementing. Sebelum dilakukan cementing diperlukan uji laboratorium terlebih dahulu agar didapatkan hasil yang maksimal. Retarder merupakan additive yang digunakan untuk memperpanjang waktu proses pengerasan pada semen sebelum dipompakan. Jenis retarder yang digunakan adalah Lignosulfonat. Tujuan utama dari penelitian ini adalah untuk mengetahui konsentrasi yang diperlukan sesuai dengan kebutuhan di sumur. Penelitian ini dilakukan di laboratorium menggunakan al

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24

Lin, Yue Zhong, Yong Qiang Lai, and Li Jie Zheng. "Experimental Study on Spray Materials at Low Temperature." Advanced Materials Research 466-467 (February 2012): 93–96. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.93.

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According to the low temperature spray process, using double quick cement, retarder, water retaining agent, water reducing agent, polymer, fiber was investigated using orthogonal theory the feasibility of preparation of guniting material. Through the experimental research prepared early strength, high adhesiveness, high crack resistance, high economic performance of gunite material, its each index can meet the requirements of the application.

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25

Xia, Xiu Jian, Jin Tang Guo, Shuo Qiong Liu, Jian Zhou Jin, Yong Jin Yu, and Ya Kai Feng. "Development of Functional Polymer as Oil-Well Cement Retarder." Materials Science Forum 814 (March 2015): 191–98. http://dx.doi.org/10.4028/www.scientific.net/msf.814.191.

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In this study, a novel polymer retarder DRH-200LG was synthesized to solve the problems of retarding failure, strong dispersivity under high temperature and adverse impact on the strength development of cement stone. The composition of the polymer was confirmed by IR, and its thermal stability was proved by DSC, TG analysis and thermal treatment at 200 °C. Furthermore, the stability and strength development of cement slurry was evaluated by the comparative consistency method and ultrasonic method, respectively. The results show that DRH-200LG has good high temperature-resistance and retarding

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26

Logan, Jonathan, Ross Harder, Luxi Li, et al. "Hard X-ray polarizer to enable simultaneous three-dimensional nanoscale imaging of magnetic structure and lattice strain." Journal of Synchrotron Radiation 23, no. 5 (2016): 1210–15. http://dx.doi.org/10.1107/s1600577516009632.

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Recent progress in the development of dichroic Bragg coherent diffractive imaging, a new technique for simultaneous three-dimensional imaging of strain and magnetization at the nanoscale, is reported. This progress includes the installation of a diamond X-ray phase retarder at beamline 34-ID-C of the Advanced Photon Source. The performance of the phase retarder for tuning X-ray polarization is demonstrated with temperature-dependent X-ray magnetic circular dichroism measurements on a gadolinium foil in transmission and on a Gd5Si2Ge2crystal in diffraction geometry with a partially coherent, fo

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27

GUO, Jintang, Xiujian XIA, Shuoqiong LIU, Jianzhou JIN, Yongjin YU, and Qianfeng YU. "A high temperature retarder HTR-300L applied in long cementing interval." Petroleum Exploration and Development 40, no. 5 (2013): 656–60. http://dx.doi.org/10.1016/s1876-3804(13)60087-7.

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Akintola, Sarah A., Tolulope Kolajo, and Agbenu Obande. "Performance Evaluation of Delonix regia Sawdust as Cement Retarder in Oil and Gas Well." Advances in Research 25, no. 6 (2024): 152–65. http://dx.doi.org/10.9734/air/2024/v25i61188.

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Sawdust, a byproduct of wood exploitation and processing, poses environmental pollution risks if not managed appropriately. Its substantial carbon footprint can lead to pollution, habitat disruption, and fire hazards. However, repurposing sawdust as a chemical additive in cement slurry within the oil and gas industry offers an environmentally friendly solution. This practice aligns with sustainability goals, enhances cement slurry properties, promotes wellbore stability, and replaces more hazardous additives, thereby reducing environmental impact. This study is aimed at the production of a ret

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29

Chen, Xiuqi, Wei Wei, Hongbin Mu, Xu Liu, Zhuo Wang, and Qingdong Yan. "Numerical Investigation and Experimental Verification of the Fluid Cooling Process of Typical Stator–Rotor Machinery with a Plate-Type Heat Exchanger." Machines 10, no. 10 (2022): 887. http://dx.doi.org/10.3390/machines10100887.

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This paper discusses the heat transfer process for a typical stator–rotor machinery-hydrodynamic retarder from the perspective of computational fluid dynamics and experimental means. Fluid cooling is an essential step in the working process of hydrodynamic retarders, and changes in viscosity along with temperature rise will affect the performance of braking. To investigate the heat transfer process of stator–rotor machinery, a novel computational fluid dynamics (CFD) method, combined with a dynamic thermophysical property transfer algorithm, is proposed. A heat-flow coupling numerical method w

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Wang, Quanyang, Chenghua Zhou, Honghu Zhang, et al. "Preparation of Low-Molecular-Weight Polyacrylamide as the Delayed Crosslinking Plugging Agent for Drilling Fluid." Gels 10, no. 2 (2024): 112. http://dx.doi.org/10.3390/gels10020112.

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Deep wells and ultra-deep wells often encounter cracks, karst caves, and other developed strata, which can lead to leakage during drilling. Conventional bridge slurry plugging technology is prone to leaking due to the poor plugging effect of the plugging agent. The gel plugging agent possesses characteristics of flexible plugging and adaptive matching of formation leakage channels. It can fill cracks or caves and enhance the pressure-bearing capacity of the formation. A controllable crosslinking plugging agent based on low-molecular-weight polyacrylamide was studied. Polyacrylamide with differ

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Vishal, Gadgihalli, M. S. Ramya, Khan Abrar, and Prasad Havanje Dinakar Raghavendra. "ANALYSIS OF PROPERTIES OF CONCRETE USING POTASSIUM POWDER AS ADMIXTURE." International Journal of Research - Granthaalayah 5, no. 4 RASM (2017): 41–45. https://doi.org/10.5281/zenodo.889395.

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Chemical admixtures are the ingredients in concrete other than Portland cement, water and aggregate those are added to mix immediately before or during mixing. These admixtures are primarily used to reduce the cost of concrete construction, to modify the properties of hardened concrete, to ensure the quality of concrete during mixing, transportation, placing curing and to overcome certain emergences during concrete operations. In this paper analysis of properties of concrete using potassium power as admixture is studied and verified the strength of concrete and temperature emitted due to chemi

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Li, Xiangli, Lezhi Ye, Mingfei Li, and Qiang Lv. "Research on Temperature and Braking Performance of Water-Cooled Eddy Current Retarder." IEEE Access 9 (2021): 38991–98. http://dx.doi.org/10.1109/access.2021.3058243.

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NISHIOKA, Yukiko, Tetsurou MATSUSHITA, Masarou KOJIMA, and Yuki NAITO. "EFFECT OF RETARDER ON MORTAR HYDRATION AND MICROSTRUCTURE IN HIGH TEMPERATURE ENVIRONMENT." Cement Science and Concrete Technology 75, no. 1 (2022): 136–43. http://dx.doi.org/10.14250/cement.75.136.

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34

Bosma, M. "Akzo Nobel Twistar™ : LCP-Retarder Films with Improved Temperature-Matched Compensation." SID Symposium Digest of Technical Papers 29, no. 1 (1998): 850. http://dx.doi.org/10.1889/1.1833897.

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Bosma, M. "Akzo Nobel Twistar™: LCP-retarder films with improved temperature-matched compensation." Journal of the Society for Information Display 6, no. 4 (1998): 231. http://dx.doi.org/10.1889/1.1985245.

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36

Kodzoev, M.-B., S. Isachenko, S. Kosarev, et al. "Modified gypsum binder." MATEC Web of Conferences 170 (2018): 03022. http://dx.doi.org/10.1051/matecconf/201817003022.

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Gypsum-based binder modified by clay has properties close to the gypsum binder and can be used as plaster formulations or mortars. There are several reasons and chief among them is the lack of scientific based theory of formation and hardening properties of gypsum-based binder modified by clay without additives and that modified by additives. One of the classic ways of studying the mechanism of hydration of gypsum binders is the analysis of the heat liberation: hydration heat of the binder. With the thermos method of determining the heat liberation the ambient temperature is constant and the t

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Perez-Salinas, Cristian, Cristian Castro, Gustavo Patin, Francisco Peña, and David Paredes. "Application of Flame Retardants Aluminum Hydroxide and Magnesium Hydroxide in a Material Composed of Glass Fiber with Polymeric Matrix and its Influence on the Flammability Index." Key Engineering Materials 818 (August 2019): 128–33. http://dx.doi.org/10.4028/www.scientific.net/kem.818.128.

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Nowadays, the fire behavior of polymer composite materials is a concern in automotive applications. Due to the flammability of this type of compounds, the present study focused on analyzing the influence of the flame retardants of aluminum hydroxide and magnesium hydroxide on the flammability index. A DOE was carried out using a complete factorial design using two categorical variables (type of resin and type of retardant at two levels) and one quantitative variable (volumetric percentage of the retarder for 3 levels). Twelve combinations of composite material were manually conformed maintaini

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Amir, Zulhelmi, Ismail Mohd Saaid, Mohd Usman Mohd Junaidi, and Wan Zairani Wan Bakar. "Weakened PAM/PEI Polymer Gel for Oilfield Water Control: Remedy with Silica Nanoparticles." Gels 8, no. 5 (2022): 265. http://dx.doi.org/10.3390/gels8050265.

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Polymer gel treatment is one of the most popular conformance control methods used in the petroleum industry. The advantage of the polymer gel system used in harsh reservoir conditions is an integrated process that must take into account all elements of gelation kinetics. In high-temperature applications, NH4Cl has been selected as a retarder to extend the gelation time of a PAM/PEI gel system. However, the gel network loses gel strength when salt and retarder increase, resulting in a weak gel structure, and becomes susceptible. The combination of these two variables leads to the development of

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Mu, Yan, Ying Li Fu, and Feng Qing Zhao. "Water-Resistant Modification of Desulphurization Gypsum Block." Applied Mechanics and Materials 182-183 (June 2012): 278–82. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.278.

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A high performance water resistance agent KD-3 prepared from OPC cement, fly ash, slag and additives was used for the modification of hemi-hydrate desulphurization gypsum. Various factors on gypsum block were investigated. The prepared gypsum block possesses excellent water-resistance, good operating property and high mechanical strength. The optimized results was obtained: calcined gypsum 74.9%, KD-3 25%, retarder 0.1%, curing temperature 60°C and curing time 16h.

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Hošková, Šárka, Petra Tichá, and Pavel Demo. "Determination of Calcium Ions in Hydrated Cement Paste at Early Stage." Materials Science Forum 636-637 (January 2010): 1239–43. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.1239.

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A novel method that allows determining instantaneous concentration of calcium ions, Ca2+, in hydrated cement paste (HCP) is suggested. EDTA solution (belonging to a group of carboxylic acids/carboxylates and borates) seems to be very effective retarder altering nucleation and subsequent growth of newly forming clusters of calcium minerals. Concentrations of Ca2+ have been determined for various water to cement ratios, at different times and for given temperature.

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Shenglai, Guo, Bu Yuhuan, Shen Zhonghou, Du Fu, and Ma Cong. "The Effect of Synthesis Conditions on the Performance of Large Temperature Difference Retarder." Research Journal of Applied Sciences, Engineering and Technology 5, no. 19 (2013): 4751–56. http://dx.doi.org/10.19026/rjaset.5.4314.

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Chen, Ming, Xuexun Guo, and Gangfeng Tan. "Heat source temperature control investigation of a hydraulic retarder based organic Rankine cycle." International Journal of Vehicle Performance 3, no. 4 (2017): 365. http://dx.doi.org/10.1504/ijvp.2017.086910.

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Hu, Yun Da. "Research on Flywheel Sets on Electromagnetic Eddy Current Retarder Test-Bed." Advanced Materials Research 219-220 (March 2011): 318–21. http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.318.

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A test-bed used to test electromagnetic eddy current retarder’s performance was designed. It can evaluate the connection of automobiles speed, excitation current, rotor temperature and brake torsion. Besides, a series of flywheels were designed which can randomly combine and simulate the running state of the automobiles. The design of flywheel is referred in many machines, not for it can solve the problem of stability, but for providing moment of inertia.

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Yu, Ran Gang, and Xin Hu Wang. "Admixtures in Concrete Crack Control and Construction Technology Optimization." Advanced Materials Research 163-167 (December 2010): 1115–20. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.1115.

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This paper studies properties of concrete under the action of water-reducing retarder and expansive agent; gives the optimal design calculation method of cooling water pipe in the construction technology: mainly considering pipe’s diameter, distance, cooling water’s flow, temperature, time etc; studies the optimization to the concretes construction method. Midas/Civil, one finite element analysis soft-ware, analyses mass concrete construction of the whole process of the temperature field and stress field in the numerical simulation, considering the admixtures and construction technology. The r

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Kolobrodov, V. H. "Computer Modelling Technologies of Optical System of Polarizing Thermal Imager." Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 83 (December 30, 2020): 69–74. https://doi.org/10.20535/radap.2020.83.69-74.

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The energetic resolution is a main parameter of any thermal imager depending on the transmittance of its optical system. The optical system of a polarizing thermal imager (PTI) consists of a polarizer, a phase shifter and a lens arranged in series on the optical axis. This paper proposes a method for calculation of the energic transmittance of the PTI’s optical system for partially polarized radiation as a function of angular orientation of the polarizer and the phase retarder. The physical-mathematical model of transformation of partially polarized radiation within the optical system which de

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Yang, Lin, Andreas Frank, Robert Wüest, et al. "A Study on Different Types of Fiber Coils for Fiber Optic Current Sensors." Key Engineering Materials 605 (April 2014): 283–86. http://dx.doi.org/10.4028/www.scientific.net/kem.605.283.

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We consider an interferometric fiber optic current sensor with a fiber coil operated in reflection and compare three different techniques to prepare the coil: thermally annealed coils, stress-free packaging of a bare low birefringent fiber in a fused silica capillary, and coils from highly birefringent spun fiber. In particular we theoretically and experimentally investigate how the fiber retarder that generates the near left and right circular light waves in the sensing fiber must be prepared for temperature compensation of the Faraday effect in the three cases. All three methods can achieve

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Yu, Yang, Chunmei Zhang, Tao Gu, et al. "Synthesis and evaluation of a new type of oil-well cement temperature-resistant retarder." Construction and Building Materials 302 (October 2021): 124153. http://dx.doi.org/10.1016/j.conbuildmat.2021.124153.

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Wu, J., J. Sickorez, J. Street, et al. "Case Study: Single-Aqueous-Phase Retarded Acid Performance Offshore Sarawak." Journal of Petroleum Technology 73, no. 11 (2021): 46–49. http://dx.doi.org/10.2118/1121-0046-jpt.

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The purpose of acid stimulation of carbonate formations is to increase production. The essential component for these stimulation fluids is the carbonate-dissolving agent, which creates conductivity channels connecting the reservoir with the wellbore. Controlling the reactivity of hydrochloric acid (HCl), the most-used dissolving agent due to its high dissolving capacity, wide availability, and low unit cost, is the most viable approach to successfully stimulate a high-temperature carbonate reservoir. It is essential to retard the HCl-carbonate rock reaction to achieve the optimum balance betwe

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Keskküla, Kadri, Tambet Aru, Mihkel Kiviste, and Martti-Jaan Miljan. "Hygrothermal Analysis of Masonry Wall with Reed Boards as Interior Insulation System." Energies 13, no. 20 (2020): 5252. http://dx.doi.org/10.3390/en13205252.

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When the masonry walls of buildings under heritage protection need to be restored and thermally improved, the only option is to use an interior insulation system. This is also the riskiest method of insulating walls in cold climates. Capillary active interior insulation systems have been proven to be the most reliable, minimizing the risk of mold growth and decay caused by condensation. They have also been proven to be less risky in wind-driven rain. The building studied is situated in a heritage-conservation area in downtown Tartu, Estonia, and therefore cannot be insulated from the exterior.

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Yang, Zhi Yong, Song Zhao, Jun Hu, and Zeng Chan Lu. "The Effect of FGD Gypsum Heat Treatment Process on Properties of Cement." Applied Mechanics and Materials 422 (September 2013): 46–50. http://dx.doi.org/10.4028/www.scientific.net/amm.422.46.

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To clarify the utilization of flue gas desulphurization (FGD) gypsum as the retarder of cementbased materials,the effect of the properties of the slag cement with different tempemtuIe treatment of FGD gypsum was studied. The results reveal that in the case of adding the same amount, the setting time of cement shortened with the increasing of heat treatment temperature of FGD gypsum. The influence of different heat treatment processes on the strength of cements was not obvious and the strength development was good. The water consumption of normal consistency for cements changed slightly. Stabil

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