The addition of Gilsonite, a natural bitumen modifier, can improve the performance of asphalt mixtures. Gilsonite can enhance the durability and resistance of asphalt to various flaws, such as cracking and moisture damage. Incorporating Gilsonite into asphalt mixtures is a cost-effective and sustainable way to extend the service life of roads and highways.
Some asphalt in which addition of gilsonite

Addition of Gilsonite Enhances Mechanical Properties of Asphalt Mixtures

Taking into account the use of fillers such as cement and their negative economic and environmental implications, the research team at PetroNaft attempted to determine the effect of Gilsonite addition as a substitute for a portion of the aggregate filler in the amounts of 0, 20, 40, 60, and 80% filler. be paid the effect of this additional quantity on the asphalt mixture’s functional parameters will then be investigated. In this direction, control samples were initially mixed using the Marshall method. In order to establish the deformation modulus, fatigue tests using indirect tensile strength, creasing potential using the dynamic creep method, and repetitive loading have been conducted. The results of this study indicate that the addition of gilsonite to asphalt mixtures has increased their modulus of elasticity. Additionally, the addition of gilsonite has led to an increase in the fatigue life of asphalt mixture samples. The findings of the dynamic creep test indicate that asphalt mixture samples containing gilsonite exhibited the least amount of permanent deformation under various loading cycles. Consequently, it is reasonable to assume that the addition of gilsonite can enhance the mechanical qualities of the asphalt mixture.

Asphalting the road in which gilsonite is added

Related Article: improve modified bitumen

The most significant findings of this study are:

1- Asphalt samples modified with varying amounts of gilsonite exhibit much superior fatigue performance than control asphalt samples. As a result of combining bitumen with gilsonite filler, the acidic qualities of bitumen are transformed into non-polar properties, resulting in the development of more non-polar linkages between bitumen and aggregate. Among the bitumens that can be mixed with gilsonite is penetration bitumen 60/70.

2- Increasing the proportion of gilsonite has extended the fatigue life of asphalt mixtures at both 5 and 25 degrees Celsius. There is a significant difference between the fatigue life of samples modified with gilsonite at 5 degrees Celsius and the performance of control mixtures at the same temperature.

3-Mixtures comprising varying mixtures of gilsonite have less permanent shape change and hence less possibility for cracking.

4- As the value of various percentages of gilsonite grows, the permanent form change diminishes and follows a decreasing trend until the value reaches 80%. The increase in asphalt mixture temperature has caused asphalt mixtures to become more susceptible to rutting. In addition, the performance difference between the control and modified asphalt mixtures with gilsonite against rutting at high temperatures was determined. It’s been longer.

5- The addition of gilsonite additive has caused an increase in the modulus of elasticity of the asphalt mixture samples. The value of the modulus of elasticity in the control samples (without gilsonite) was 1222 MPa. This parameter in the samples containing
20, 40, 60 and 80 percent gilsonite was 1391, 1487, 1547 and 1623 megapascals.

Prepared by the PetroNaft Co. research team.

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