Method of forecasting the effectiveness of cationic bitumen emulsions

Shekhovtsova, Svetlana; Korotkov, Aleksey; Vysotskaya, Marina

doi:10.18720/mce.78.7

Cited by 2 publications

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“…However, the research on the surface characteristics of the aggregate and bitumen emulsion chemistry is rarely reported. Meanwhile, each aggregate-bitumen emulsion combination has a distinct chemical composition, which influences the connection between the aggregate and the bitumen [ 44 , 54 , 55 ] and therefore affects the CRM mechanical performance (i.e., bearing capacity and water damage sensitivity) [ 56 , 57 , 58 ]. In the case of cationic emulsions, the use of an aggregate with a surface charge similar to that of bitumen, such as limestone, results in poor adhesion between the bitumen and the aggregate, as well as a delay in the curing time [ 59 , 60 ].…”

Section: Bitumen Emulsion Propertiesmentioning

confidence: 99%

Current Research and Challenges in Bitumen Emulsion Manufacturing and Its Properties

Al-Mohammedawi

Mollenhauer

2022

Materials

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The global increase of road infrastructure and its impact on the environment requires serious attention to develop sustainable and environmentally friendly road materials. One group of those materials is produced by using bitumen emulsion. However, there are still scientific and technical obstacles standing against its regular application. The bitumen emulsion formulation process and compositional optimization are subjected to a high number of degrees of freedom. Consequently, obtaining the desired product is mostly based on a series of random and tedious trials because of the enormous number of tests that are carried out to meet the required properties, such as emulsion stability, viscosity, droplet size (and distribution), and bitumen emulsion chemistry. Several pre-established formulation procedures have been presented in the literature. Some of them have technical limitations to be utilized for practical industrial application, whereas others are still not understood enough to be applied in bitumen emulsion formulation. Therefore, discussing some important issues in this field could be useful to offer a practical guide for bitumen emulsion manufacturers when trying to formulate a well-defined bitumen emulsion to best fit its use in pavement infrastructure rather than to simply to meet standard specifications. This review paper aims to enable the ultimate potential of bitumen emulsion by further reviewing the research progress of bitumen emulsion manufacturing and discussing the literature available up to now on this topic, in the realm of bitumen emulsion manufacturing and emulsion chemistry.

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Section: Bitumen Emulsion Propertiesmentioning

confidence: 99%

Current Research and Challenges in Bitumen Emulsion Manufacturing and Its Properties

Al-Mohammedawi

Mollenhauer

2022

Materials

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Estimating the effect of aqueous cationic latex from the class of thermal elastic plastics on the properties of bitumen emulsions

Zhdaniuk

Novakovska

2021

EEJET

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To produce cationic bitumen emulsions, bitumen is used, whose penetration is not lower than 90 mm-1. Such bitumen has a small plasticity interval, which leads to a deterioration in its heat resistance at elevated temperatures and narrows the scope of application of emulsions based on it. Based on the review of emulsion modification methods, the modification has been proposed that involves mixing the finished bitumen emulsions with aqueous cationic latex. The process of interaction between a bituminous emulsion and an aqueous cationic latex has been considered. A mechanism for the disintegration of the modified bitumen emulsion on the surface of mineral materials was proposed. The emulsifiers have been selected and the composition of the aqueous phase has been chosen based on the analysis of surface tension isotherms. The influence of the modification on the properties of bitumen emulsions was investigated. It was established that the main physicochemical characteristics of the interphase surface accept similar values for the aqueous phase and emulsions based on it. It has been proven that the introduction of aqueous cationic latex quite moderately affects the basic physical-mechanical properties of emulsions, which makes it possible not to change the main technological parameters when using them. It was established that increasing the concentration of the polymer in the emulsion has a positive effect on the physical-mechanical properties of the binder. With an increase in the concentration of the polymer to 6 % the softening temperature increases by 16 °C, elasticity is 74 %, and the holding capacity at minus 25 °C is approaching 100 %. Improving the physical-mechanical properties of residual binder as a result of emulsion modification could increase the durability of layers in a roadbed based on bitumen emulsions and expand the scope of their application in the construction and repair of motorways

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Method of forecasting the effectiveness of cationic bitumen emulsions

Cited by 2 publications

References 0 publications

Current Research and Challenges in Bitumen Emulsion Manufacturing and Its Properties

Current Research and Challenges in Bitumen Emulsion Manufacturing and Its Properties

Estimating the effect of aqueous cationic latex from the class of thermal elastic plastics on the properties of bitumen emulsions

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