Asphalt industry term Notes
SBS modified bitumen, SBS defined as follow:
SBS is a styrenic thermoplastic elastomer, styrene, butadiene and styrene block copolymer (thermoplastic styrene-butadiene block copolymer) or (thermoplastic styrene-butadiene rubber), referred to as the SBS. Structure of the cable type and the two star, play a modified role in asphalt mainly anti-aging properties of asphalt, SBS modified asphalt waterproofing membrane is the leading product in the international waterproof material, the chain of the molecular structure of benzene ethylene - butadiene - styrene, SBS is the composition of the molecular structure of the English-letter abbreviation.
Asphalt penetration
Petroleum asphalt has three technical in nature, one of which is viscosity, refers to the bituminous material in the asphalt particles under external force to resist deformation performance relative displacement hinder the relative flow of a characteristic is reflected inside the material. Viscosity, penetration, said the smaller its value, indicating that the greater the viscosity. Penetration Determination: sink into the depth of the asphalt samples in the temperature of 250 ° C, weight 100g standard needle 5S, every depth of 1/10 mm, for once.
Road petroleum asphalt at 160 #, 130 #, 110 #, 90 #, 70 #, 50 #, 30 #, the main technical indicators: penetration, Climate Zone for the softening point, ductility, flash point, solubility, power viscosity, penetration index. The label is divided according to their penetration index, such as # 160 penetration 140 ~ 200,110 # 100 ~ 120 (in 0.1mm).
Marshall stability Tester
The instrument is suitable for the determination of the thermal stability of the asphalt mixture and resistance to plastic deformation - stability and flow values. Provide an accurate basis for the composition of the asphalt mixture ratio design. Of LWD-2 configuration of LWD-1 on the basis of computer digital display devices, it has a separate digital load and flow monitors, the monitor can automatically maintain the peak load and the flow of reading, so that the operator can immediately calculate the Marshall number (peak load, the flow value). Of LWD-3 specimen loaded chuck, press the run button, the instrument will automatically load and print the peak load and flow values, and can draw the load deformation curve, automatic unloading, a higher degree of automation.