AS 3568-1999 pdf free download.Oils for reducing the viscosity of residual bitumen for pavements.
1. SCOPE This Standard sets out the requirements for hydrocarbon oils, derived from refined crude oil, to be used for reducing the viscosity of bitumen in sprayed work and in the preparation of bituminous cold mixes and fluxed asphalt.
3 DEFINITIONS For the purpose of this Standard the definitions below apply.
3.1 Cold mix—a mixture of bituminous binder and aggregate, with or without added mineral filler, produced warm or cold in a mixing plant, and delivered in a workable condition suitable for stockpiling, and spreading and compaction.
3.2 Cutter oil a light petroleum distillate added to bitumen to temporarily reduce its
viscosity.
3.3 Flux oil —a petroleum distillate used to produce a long-term reduction in the viscosity of a binder.
3.4 Heavy flux oil—a petroleum residue used to produce a long-term reduction in the viscosity of a binder.
3.5 Residual bitumen bituminous material obtained by processing the residue from the refining of naturally occurring crude oil.
3.6 Sprayed work—comprises priming, primer-sealing and sealing of prepared surfaces using bituminous binders which may contain oils for reducing their viscosity.
4 PROIERTIES
4.1 General Properties of the oils, when determined in accordance with the methods of test prescribed in Table I, shall comply with the requirements specified therein. A heavy flux oil is also available and its properties shall comply with the requirements given in Table 2.
4.2 Cleanliness and fluidity The oil shall be clean and free of particulate matter. It shall be liquid at the prevailing temperature at the point of use.
4.3 Miscibility The oil shall be compatible with bitumen so that when one part by volume of the oil at ambient temperature is mixed with one part by volume of bitumen at a temperature of 80°C, and the mixture is allowed to cool to ambient temperature, it shall not separate after standing for one hour.
5 SAMPLING
5.1 General The purchaser should sample and test the oil at his discretion, either prior to its dispatch from the source of supply or subsequent to its delivery, or both. Representative samples shall be taken by the supplier in the presence of the purchaser’s representative.
The viscosity of each of the samples may be determined in order to detect stratification.
5.2 Sample containers Containers for oil or cutback samples shall be clean, dry double- tight, friction-top cans of I L capacity, unless otherwise specified by the purchaser.
Containers for volatile diluent samples shall be appropriate to the consistency and volatility of the material.
5.3 Sampling from drums A number of drums shall be selected at random, the number to be approximately equivalent to, but not less than, the cube root of the total number of drums in the lot.
Each drum from which a sample is to be taken shall be agitated unless stratification is suspected. in which case it shall be sampled in layers. From each drum a sample of not less than 100 mL shall be taken from at least 100 mm below the surface and at least 100 mm from the side of the drum.AS 3568-1999 pdf free download.