Tables of penetration grade asphalt

They achieve very flexible and tenacious connections with other materials due mainly to viscoelastic response of bitumen, which behavior depends on how fast charges are applied. Therefore, it can easily be used in the field. Viscosity Grade Bitumen Asphalt is a standard grade Bitumen usually used as a Paving Grade Bitumen suitable for road construction and for the production of asphalt pavements with superior properties. The penetration grade bitumen is a thermoplastic material. One of them is dispersed as fine globules within the other liquid.
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Advantage of Viscosity Grade Bitumen

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Superpave Performance Grading

One is denoted AC asphalt cement , followed by a number indicating the viscosity in hundreds of poises at 60 C. Thus, the Asphaltenes and the Maltenes content increases resulting in a harder mix. The test does not provide information with which to establish mixing and compaction temperatures. If needed, volume corrections for asphalt cements should be made according to Practice D The range of pavement temperatures at any one site is not adequately covered. This grade of Bitumen is mainly used in the manufacture of hot mix asphalt for bases and wearing courses and possesses characteristics and qualities unique sand quite different from other agents.
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Types of Bitumen -Properties and Uses in Pavement & other Constructions

Penetration Value of Bitumen. Tests on original asphalt: Many researchers believe that grading of bitumen should be by an absolute viscosity in instead of the conventional penetration units. To understand the performance of the bitumen when it is on service, the design of physical properties of the material is highly essential. Viscosity is defined as the inverse of fluidity.
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This test is for bitumen that is for road application. Grading is more precise and there is less overlap between grades. Asphalt binders can have significantly different characteristics within the same grading category. Test methods only consider short-term asphalt binder aging thin film oven test although long-term aging is a significant factor in fatigue cracking and low temperature cracking. The table-2, shows the cutback specifications based on BS
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