Spinning properties of slag fiber according to viscosity model

Slag means residues that occur during the steelmaking process. Measuring the high temperature viscosity of the slag is difficult and high cost. So, viscosity models can be used to predict the trends in viscosity as a function of the key variables, and so assist in the selection of process conditions and the optimization of the performance of slag fibers. Slag fibers with compositions similar to glass/carbon fibers are also expected to be suitable for spinning at a log viscosity value of 2.8–3. The fiberizing temperature of glass fiber is more than [Formula: see text] and the fiberizing temperature of basalt fiber is more than [Formula: see text], while the slag fiber can be spun at a low temperature.

Download Full-text

Experimental studies on the dynamic viscoelastic properties of basalt fiber-reinforced asphalt mixtures

Science and Engineering of Composite Materials ◽

10.1515/secm-2021-0047 ◽

2021 ◽

Vol 28 (1) ◽

pp. 489-498

Author(s):

Yongjun Zhang ◽

Wenbo Luo ◽

Xiu Liu

Keyword(s):

High Temperature ◽

Low Temperature ◽

Dynamic Modulus ◽

Basalt Fiber ◽

Fiber Content ◽

Fiber Reinforced ◽

Basalt Fibers ◽

Rutting Resistance ◽

Dynamic Modulus Test ◽

Temperature Dynamic

Abstract To study the influence of basalt fibers on the viscoelastic mechanical properties of asphalt concrete (AC) mixtures, unconfined compressive dynamic modulus tests were performed on styrene–butadiene–styrene (SBS)-modified AC mixtures reinforced with various contents of basalt fibers ranging from 0.2 to 0.5% by weight at five temperatures and six load frequencies, and the dynamic moduli and phase angles of the mixtures were measured. Compared with the test results of the control mixture (with no basalt fibers), the data show that the high-temperature dynamic modulus of the mixtures initially increases and subsequently decreases with increasing fiber content and reaches its maximum value when the basalt fiber content is 0.3%, while the low-temperature dynamic modulus decreases monotonically with increasing fiber content. Furthermore, the phase angle of the mixtures initially decreases and later increases with increasing fiber content and reaches its minimum value when the basalt fiber content is 0.3%. These behaviors indicate that the addition of basalt fiber improves the high-temperature rutting resistance and low-temperature cracking resistance of the SBS-modified AC mixtures. In addition, the results of the wheel rut test exhibit a good correlation with the results of the dynamic modulus test, revealing the reliability of the dynamic modulus test for evaluating the high-temperature rutting resistance of basalt-fiber-reinforced AC mixtures.

Download Full-text

Laboratory Study on Properties of Diatomite and Basalt Fiber Compound Modified Asphalt Mastic

Advances in Materials Science and Engineering ◽

10.1155/2017/4175167 ◽

2017 ◽

Vol 2017 ◽

pp. 1-10 ◽

Cited By ~ 15

Author(s):

Yongchun Cheng ◽

Chunfeng Zhu ◽

Guojin Tan ◽

Zehua Lv ◽

Jinsheng Yang ◽

...

Keyword(s):

High Temperature ◽

Low Temperature ◽

Basalt Fiber ◽

Performance Study ◽

Cone Penetration ◽

Modified Asphalt ◽

Asphalt Mastic ◽

Temperature Performance ◽

Low Temperature Performance ◽

Different Content

In order to improve the performance of asphalt mastic, some researchers have added diatomite or basalt fiber as a modifier to the asphalt mastic, and the results show that some properties of the asphalt mastic were improved. For the simultaneous addition of diatomite and basalt fiber, two kinds of modifier, compound modified asphalt mastic had not been reported; in this paper, thirteen groups of diatomite and basalt fiber (DBFCMAM) compound modified asphalt mastic with different content were prepared to study the performance. Softening point, cone penetration, viscosity, and DSR tests were conducted, for the high temperature performance evaluation of DBFCMAM, whereas force ductility and BBR tests were used in the low temperature performance study of the DBFCMAM. The results demonstrated that the high temperature performance of DBFCMAM was increased; moreover, the low temperature performance of DBFCMAM improved by diatomite and basalt fiber according to the results of the force ductility test; however, the conclusion of the BBR test data was inconsistent with the force ductility test. In summary, the high temperature and low temperature properties of DBFCMAM had been improved.

Download Full-text

Selection of the two enantiotropic polymorphs of diF-TES-ADT in solution sheared thin film transistors

Journal of Materials Chemistry C ◽

10.1039/d0tc03222k ◽

2020 ◽

Vol 8 (43) ◽

pp. 15361-15367

Author(s):

Tommaso Salzillo ◽

Nieves Montes ◽

Raphael Pfattner ◽

Marta Mas-Torrent

Keyword(s):

Thin Film ◽

High Temperature ◽

Low Temperature ◽

Thin Film Transistors ◽

High Temperature Polymorph ◽

Selection Of

The modulation of the deposition speed in blends of diF-TES-ADT and polystyrene controls the formation of either the low-temperature or the high-temperature polymorph.

Download Full-text

Behaviour of Zirconia Based Fuel Material Under Xe Irradiation

MRS Proceedings ◽

10.1557/proc-439-625 ◽

1996 ◽

Vol 439 ◽

Cited By ~ 33

Author(s):

C. Degueldre ◽

P. Heimgartner ◽

G. Ledergerber ◽

N. Sasajima ◽

K. Hojou ◽

...

Keyword(s):

High Temperature ◽

Low Temperature ◽

Room Temperature ◽

Ion Irradiation ◽

Bubble Formation ◽

High Energy ◽

Low Energy ◽

Extreme Conditions ◽

Selection Of ◽

Fuel Material

AbstractThe behaviour of ZrO2-10%YO1.5-5%ErO1.5-( 10%ThO2) (At %) cubic solid solutions under low and high energy Xe ion irradiation up to a fluence of 1.8·1016 Xe.cm−2 was investigated by TEM. Low energy (60 keV) Xe ions did not yield amorphization. From the observed bubble formation, swelling values of less than one volume per cent were estimated to be 0.19–0.72% during irradiation at room temperature or at high temperature (925 K). Furthermore, no amorphization was obtained by Xe irradiation under extreme conditions such as high energy (1.5 MeV) Xe ion and low temperature (20 K). This confirms the robustness of this material and argues in favour of the selection of zirconia based material as an advanced nuclear fuel for plutonium disposition.

Download Full-text

Gas-Bearing Turbomachinery

Journal of Lubrication Technology ◽

10.1115/1.3601696 ◽

1968 ◽

Vol 90 (4) ◽

pp. 665-678 ◽

Cited By ~ 1

Author(s):

B. Sternlicht

Keyword(s):

High Temperature ◽

Low Temperature ◽

High Speed ◽

High Efficiency ◽

Design Procedures ◽

The Past ◽

Long Life ◽

Temperature Radiation ◽

Gas Bearing ◽

Selection Of

The paper presents gas bearing turbomachinery developments for the past decade. With the aid of examples of eight different requirements, it answers the question: “Why Gas-Bearing Turbomachinery?” These examples cover: No Contamination, high efficiency, low temperature, high temperature, radiation damage, reliability and long life, high speed and long life, and simplification. The paper points out the parameters and design procedures that are important to gas bearing turbomachinery designers. A table which enables selection of gas bearings and one which compares rotor weights for motor and turbine drives are included. Several remaining problem areas are identified and an example of bearing distortion, resulting from friction, is given.

Download Full-text

Performance Characterization of Hot Mix Asphalt with High RAP Content and Basalt Fiber

Materials ◽

10.3390/ma13143145 ◽

2020 ◽

Vol 13 (14) ◽

pp. 3145 ◽

Cited By ~ 1

Author(s):

Zhengguang Wu ◽

Chen Zhang ◽

Peng Xiao ◽

Bo Li ◽

Aihong Kang

Keyword(s):

High Temperature ◽

Low Temperature ◽

Basalt Fiber ◽

Asphalt Mixtures ◽

Intermediate Temperature ◽

Pavement Performance ◽

Cracking Resistance ◽

Moisture Susceptibility ◽

Performance Space ◽

Temperature Performance

Incorporating reclaimed asphalt pavement (RAP) into asphalt mixtures achieves astonishingly environmental and economic benefits. However, there is hesitation to use higher RAP content due to the concern regarding the deterioration in pavement performance, especially the cracking resistance. Basalt fiber has been considered an effective additive to reinforce the performance of asphalt mixtures and, subsequently, the reinforcement effect is also expected for high-RAP content mixtures. Therefore, this study investigated the effect of basalt fiber on the pavement performance of asphalt mixtures with 0%, 30%, 40%, and 50% RAP contents against high-temperature performance, moisture susceptibility, low-temperature and intermediate-temperature cracking resistance, based on the wheel-tracking test, the uniaxial penetration test, the freeze-thaw splitting test, the low-temperature bending beam test, the semicircular bend fracture test and the indirect tensile asphalt cracking test, respectively. In addition, a performance-space diagram was developed to determine the mixture performance shift caused by basalt fiber. The results showed that adding basalt fiber compensated for the detrimental effect caused by RAP, leading to significant enhancement in moisture susceptibility and low- and intermediate-temperature cracking resistance of mixtures with high RAP content, along with the enhancement in high-temperature performance, indicating that basalt fiber can contribute to the use of high RAP content.

Download Full-text

Features of the account and a choice of technological decisions at manufacturing high-temperature composites based on carbon fibers

Informacionno-technologicheskij vestnik ◽

10.21499/2409-1650-2020-23-1-149-156 ◽

2020 ◽

pp. 149-156

Author(s):

В.С. Волков ◽

В.А. Волкова ◽

В.И. Привалов

Keyword(s):

High Temperature ◽

Carbon Fibers ◽

New Products ◽

Coding Systems ◽

Design Solutions ◽

Technological Methods ◽

Selection Of

Проведен анализ особенностей выбора проектных решений для технологических методов изготовления волокнистых высокотемпературных композитов на основе углеродных волокон. Показано, что изготовление таких композитов основано на принципиально иных технологических методах, в сравнении с общепринятыми в общем машиностроении. Выявлено, что указанные технологические методы изготовления не учтены в нормативной документации и вызывают различные сложности в поиске, учете и выборе проектных технологических решениях при производстве новой продукции по изделиям-аналогам и использования систем кодирования обозначений в ЕСКД и ЕСТД. Показана необходимость актуализации нормативной документации с учетом новых технологических методов изготовления данных композитов, разработки систем кодирования и формирования их архивов. The analysis of the features of the choice of design solutions for technological methods for the manufacture of fibrous high-temperature composites based on carbon fibers is carried out. It is shown that the manufacture of such composites is based on fundamentally different technological methods, in comparison with those generally accepted in general engineering. It was revealed that the indicated technological methods of manufacturing are not taken into account in the regulatory documentation and cause various difficulties in the search, accounting and selection of design technological solutions in the production of new products for similar products and the use of coding systems for signs in ESKD and UTDD. The necessity of updating the regulatory documentation taking into account new technological methods for manufacturing these composites, the development of coding systems and the formation of their archives is shown.

Download Full-text

Exsolution and inversion in pigeonite from the Whin Sill, Northern England

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100109513 ◽

1978 ◽

Vol 36 (1) ◽

pp. 474-475

Author(s):

P.P.K. Smith

Keyword(s):

High Temperature ◽

Low Temperature ◽

Homogeneous Nucleation ◽

Silicate Mineral ◽

Antiphase Boundaries ◽

Two Phase ◽

Primitive Form ◽

The Core ◽

Nucleation Mechanisms ◽

And Inversion

Grains of pigeonite, a calcium-poor silicate mineral of the pyroxene group, from the Whin Sill dolerite have been ion-thinned and examined by TEM. The pigeonite is strongly zoned chemically from the composition Wo8En64FS28 in the core to Wo13En34FS53 at the rim. Two phase transformations have occurred during the cooling of this pigeonite:- exsolution of augite, a more calcic pyroxene, and inversion of the pigeonite from the high- temperature C face-centred form to the low-temperature primitive form, with the formation of antiphase boundaries (APB's). Different sequences of these exsolution and inversion reactions, together with different nucleation mechanisms of the augite, have created three distinct microstructures depending on the position in the grain.In the core of the grains small platelets of augite about 0.02μm thick have farmed parallel to the (001) plane (Fig. 1). These are thought to have exsolved by homogeneous nucleation. Subsequently the inversion of the pigeonite has led to the creation of APB's.

Download Full-text