Change in Properties of Bitumen Used for Road Construction in Bitumineral Mixtures

Mineral Mixture ◽

Physical And Chemical ◽

Abstract. Premature destruction of asphalt concrete can be caused by the aging of bitumen, which is associated with a change in the physical and chemical properties of bitumen. The article shows that in most cases, the improvement of the characteristics of asphalt concrete is achieved through the introduction of additives that affect the basic properties of the bituminous binder, such as penetration, softening temperature, viscosity. The influence of the chemical composition of the mineral filler on the rate of bitumen aging has been experimentally proved. The obtained research data show that the increase in the rate of aging of bitumen is influenced by the compounds of silicon and aluminum. On the other hand, metals such as iron and titanium contribute to the preservation of the initial plasticity of bitumen, and the accumulation of asphaltenes in the structure of the bitumen-mineral mixture slows down.

Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London ◽

On a new compound of chlorine and carbon

10.1098/rspl.1815.0163 ◽

1833 ◽

Vol 2 ◽

pp. 153-153

Keyword(s):

Carbonic Acid ◽

Chemical Properties ◽

Glass Tube ◽

The Other ◽

Rock Crystal ◽

Acid Gas ◽

Green Glass ◽

Physical And Chemical ◽

The above substance was discovered by M. Julien, of Abo, in Finland, amongst the products arising out of the distillation of calcined sulphate of iron, with crude nitre in iron retorts. It forms white acicular crystals by sublimation, and when passed through a green glass tube containing red-hot rock crystal, it is decomposed with the deposition of charcoal and evolution of chlorine. It is not altered by repeated sublimations in chlorine. It was analysed by passing its vapour over red-hot oxide of copper, by which chloride of copper and carbonic acid gas were produced: the former was decomposed by nitrate of silver, and the proportion of chlorine estimated by that of chloride of silver formed. From this and other experiments, the authors conclude that this substance consists of one portion of chlorine and two of carbon: they failed in their endeavours to convert it into either of the other chlorides of carbon, to which, in its physical and chemical properties, it bears however a considerable resemblance.

Research of influence of adhesive additives on physical and chemical properties of road bitumens

Russian journal of transport engineering ◽

10.15862/04sats119 ◽

2019 ◽

Vol 6 (1) ◽

Author(s):

Evgenia Uglova ◽

Eugene Eremenko ◽

Natalya Sikachyova ◽

Kiril Kuzin

Keyword(s):

Physicochemical Properties ◽

Asphalt Concrete ◽

Chemical Properties ◽

Organic Binder ◽

Main Task ◽

Adhesive Properties ◽

Mineral Material ◽

Physical And Chemical ◽

To increase the adhesion strength (wetting ability) of bitumen, and, consequently, reduce the likelihood of premature occurrence of defects formed on asphalt concrete coatings, it is necessary to use various kinds of surfactants that increase the adhesion ability of bitumen. Adhesive additives to road bitumens increase the mobility of the organic binder, help reduce the number of uncoated grains of mineral material, which facilitates the compaction of asphalt concrete mix. One of the problems of durability of asphalt concrete pavements is the lack of strong adhesion of the bitumen film to the surface of the mineral material. To increase this strength, various adhesive additives are used, which affect not only the adhesive properties of bitumen, but also its physical and chemical properties. The main task of the work is aimed at solving the issues of the influence of adhesive additives on the physicochemical properties of organic binders used in road construction. The quality assessment of the modified bitumen was carried out according to GOST 22245-90, which, at present, is guided by the selection of the composition of the asphalt concrete mixture. As a result of the study, effective adhesive additives were identified that contribute to the minimal change in the physicochemical properties of viscous road bitumen and possess thermal stability under prolonged exposure to elevated temperatures. Studies have shown that almost all adhesive additives not only improve the adhesive properties of organic binders to mineral materials, but also can alter and even worsen the physicochemical properties of the original organic binder, which can adversely affect the properties of asphalt concrete. The study used the original bitumen from only one manufacturer and the negative effect of adhesive additives may be due to the incompatible chemical composition of the adhesive additive with the group composition of bitumen and the mineralogical composition of the mineral material.

Topological Aspects of Boron Nanotubes

Advances in Materials Science and Engineering ◽

10.1155/2018/5729291 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Jia-Bao Liu ◽

Hani Shaker ◽

Imran Nadeem ◽

Muhammad Hussain

Keyword(s):

Thermal Stability ◽

Electronic Properties ◽

Chemical Structure ◽

Chemical Properties ◽

Topological Indices ◽

The Other ◽

Theoretical Studies ◽

Physical And Chemical ◽

The degree-based topological indices are used to correlate the physical and chemical properties of a molecule with its chemical structure. Boron nanotubular structures are high-interest materials due to the presence of multicenter bonds and have novel electronic properties. These materials have some important issues in nanodevice applications like mechanical and thermal stability. Therefore, they require theoretical studies on the other properties. In this paper, we present certain degree-based topological indices such as ABC, the fourth ABC, GA, and the fifth GA indices for boron triangular and boron-α nanotubes.

Performance Evaluation of Epoxy Asphalt and Study of Epoxy Asphalt Used on Deck Surfacing of Concrete Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.142.157 ◽

2011 ◽

Vol 142 ◽

pp. 157-160

Author(s):

Yan Chun Li ◽

Pan Zhang ◽

Rui Lv ◽

Yu Zhuo Xu ◽

Guo Jing Hou

Keyword(s):

Performance Evaluation ◽

Chemical Properties ◽

Road Construction ◽

Concrete Bridge ◽

Cement Concrete ◽

The Road ◽

Epoxy Asphalt ◽

Physical And Chemical ◽

Accoding to the current situation of deck surfacing with Epoxy asphalt and its development in China and abroad, this paper has analyzed the feature of the function of Epoxy asphalt used on surface pavement of cement concrete bridge through analyzing the physical and chemical properties of Epoxy asphalt and further testing the superiority of Epoxy asphalt in the road construction.

Assessment of marl properties effect on sediment and runoff rate at different rainfall intensity under field rainfall simulator

Glasnik srpskog geografskog drustva ◽

10.2298/gsgd0904085h ◽

2009 ◽

Vol 89 (4) ◽

pp. 85-94

Author(s):

S.H. Hosseini ◽

S. Feiznia ◽

H.R. Peyrovan

Keyword(s):

Analysis Of Variance ◽

Sediment Yield ◽

Rainfall Intensity ◽

Chemical Properties ◽

The Other ◽

Rainfall Simulator ◽

Runoff Rate ◽

Physical And Chemical ◽

The objective of this study is to assess the effect of physical and chemical properties of Marl's formations on sediment and runoff rates at different rainfall intensities, based on using field rainfall simulator. For this purpose, first Marl's formations (Neocene's units) were separated to five units including Halite siltstone(NgSiH), Siltstone (NgSi), Mudstone (gy1C), Gypsum mudstone (gy1CG) and Halite clay stone (gy2CH), based on physical and chemical properties. Then runoff and sediment rates were determined in each unit at two intensities (30 and 60 mm/h) using rainfall simulator. Analysis of variance and Duncan's tests showed that Halite siltstone unit has produced the highest amount of runoff and sediment rates and then the runoff and sediment rates of other subunits in decreasing order are as follows: Siltstone, gy2CH, gylCG and gy1C are 5% significant level. The trend of induced runoff and sediment rates at different times showed that in Halite siltstone and Siltstone units the runoff amounts were fixed rapidly at 2nd ten minutes. And, on the other units, the runoff amounts were fixed at 3rd ten minutes and sediment yield was increased rapidly at 3rd ten minutes.

Marine-Derived Collagen as Biomaterials for Human Health

Frontiers in Nutrition ◽

10.3389/fnut.2021.702108 ◽

2021 ◽

Vol 8 ◽

Author(s):

Ning Xu ◽

Xue-Liang Peng ◽

Hao-Ru Li ◽

Jia-Xuan Liu ◽

Ji-Si-Yu Cheng ◽

...

Keyword(s):

Drug Delivery ◽

Chemical Properties ◽

Extraction Methods ◽

Marine Organisms ◽

The Other ◽

Fish Scales ◽

The One ◽

Physical And Chemical ◽

Collagen is a kind of biocompatible protein material, which is widely used in medical tissue engineering, drug delivery, cosmetics, food and other fields. Because of its wide source, low extraction cost and good physical and chemical properties, it has attracted the attention of many researchers in recent years. However, the application of collagen derived from terrestrial organisms is limited due to the existence of diseases, religious beliefs and other problems. Therefore, exploring a wider range of sources of collagen has become one of the main topics for researchers. Marine-derived collagen (MDC) stands out because it comes from a variety of sources and avoids issues such as religion. On the one hand, this paper summarized the sources, extraction methods and characteristics of MDC, and on the other hand, it summarized the application of MDC in the above fields. And on the basis of the review, we found that MDC can not only be extracted from marine organisms, but also from the wastes of some marine organisms, such as fish scales. This makes further use of seafood resources and increases the application prospect of MDC.

On Research of Basalt Fiber Used in Asphalt Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.791-793.456 ◽

2013 ◽

Vol 791-793 ◽

pp. 456-459

Author(s):

Jian Jun Li ◽

Yan Chun Liu

Keyword(s):

Asphalt Concrete ◽

Basalt Fiber ◽

Chemical Properties ◽

Market Value ◽

Basalt Fibers ◽

Green Material ◽

New Type ◽

Physical And Chemical ◽

As a new type of green material with excellent physical and chemical properties and mechanical properties. Basalt fiber are widely used in the field of civil construction. This paper focused on the use of basalt fibers to improve the mechanism of asphalt concrete, demonstrated the prospects and market value of the basalt fiber that are widely used in asphalt concrete

Effect of Dormex on `Roomy Red' Grape Vines (Vitis vinifera L.)

HortScience ◽

10.21273/hortsci.32.3.516g ◽

1997 ◽

Vol 32 (3) ◽

pp. 516G-517

Author(s):

Abdel Hameed M. Wassel

Keyword(s):

Fruit Set ◽

Chemical Properties ◽

The Other ◽

Vitis Vinifera L ◽

Number Of Clusters ◽

Bud Opening ◽

Red Grape ◽

Physical And Chemical ◽

The present investigation was carried out during 1994 and 1995 seasons on `Roomy Red' grape vines cultivated in Minia and Beni Suef governates to study the effect of Dormex and/or overcropping on `Roomy Red' grape vines. Bud opening, number of clusters per vine, as well as the yield and its physical and chemical properties, were studied. Results indicated that Dormex overcame the irregularity of bud opening. At the same time, bud opening preceded the control by about 4 weeks. The percentage of bud opening, fruit set, as well as the number of clusters per vine, were increased. On the other hand, over-cropping had a vice versa effect on the previous parameters as compared with the control. Results also indicated that onion was of less effect than berseem in this concern.

Correlation and modelling of the penetration and softening point tests of bitumen binders with a variety of physical and chemical properties

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles ◽

10.2516/ogst/2021046 ◽

2021 ◽

Vol 76 ◽

pp. 57

Author(s):

Marvy Girgis ◽

Jérémie Barbier ◽

Alain Quignard ◽

Isabelle Merdrignac ◽

João Marques

Keyword(s):

Softening Point ◽

Good Accuracy ◽

Chemical Properties ◽

The Other ◽

Proton Nuclear Magnetic Resonance ◽

H Nmr ◽

Ft Ir ◽

Physical And Chemical ◽

Studying bitumen has always posed a challenge to researchers owing to its extreme complexity and unique properties. To classify it commercially and to determine bitumen grade, two standard empirical tests have been adopted within the European standardized bitumen binders system [EN 12591:2009 (2009) Bitumen and bituminous binders – Specifications for paving grade bitumens]: Softening Point (SP) and Penetration (PEN). The relationship between these two tests and the physical or chemical properties of bitumen is not well understood. For the first time, this study represents an attempt to build more understanding of such a relationship through a comprehensive study of the correlation between the two standard tests and many physical and chemical properties of bitumen. A second goal is to propose some predictive models for these two tests and compare their predictive accuracy. Therefore, 13 Straight Run Vacuum Residues (SRVR) samples from different geographical origins were analyzed to measure the following parameters: Dynamic Viscosity (VisDy), Conradson Carbon Residue (CCR), C5 Asphaltenes Content (AspC5), C7 Asphaltenes Content (AspC7), Elemental Analysis (including C, H, O, N, S, Ni, and V content), Simulated Distillation (SD), Fourier-Transform Infrared Spectroscopy (FT-IR), and proton nuclear magnetic resonance spectroscopy (H-NMR). Results of studying correlations using correlation matrix and Principal Component Analysis (PCA) have emphasized the prominent effect of asphaltenes content on the other properties and the results of SP and PEN. It has also shown the potential importance of the aliphaticity/aromaticity of bitumen. Then, four models were proposed for the prediction of SP and PEN: viscosity, FT-IR, H-NMR, and multi-parameter models. Partial least squares (PLS) regression was used for building all models, except viscosity ones. All SP models, except H-NMR model, exhibited very good accuracy compared to the standard method. On the other hand, PEN was more difficult to predict than SP and only the multi-parameter model of PEN showed relatively good accuracy of prediction.

Physical Modification of Bentonite on the Salt Resistence Capacitiy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.743-744.687 ◽

2013 ◽

Vol 743-744 ◽

pp. 687-691

Author(s):

Zhi Ming Sun ◽

Yang Yang Huai ◽

Zhong Lei Dou ◽

Shui Lin Zheng

Keyword(s):

Double Layer ◽

Resistance Mechanism ◽

Chemical Properties ◽

Salt Resistance ◽

The Other ◽

Mineral Separation ◽

Physical Modification ◽

Physical And Chemical ◽

A kind of bentonite composite with high salt resistance capacity was prepared using physical modification including physical mineral separation and doping porous non-metallic minerals. The results showed that through physical mineral separation, the content of montmorillonite and the salt resistance capacity increased substantially. The bentonite compsite sample doped by 5.0% diatomite showed better salt resistance capacity than the other compsite samples. The salt resistance mechanism was discussed through the double layer theory and physical and chemical properties of doped minerals.