Abstract: A device for evaluating characteristics of a target ground containing a metal component is proposed. The device includes a penetration probe having a main frame and a pair of side frames respectively installed at opposite side ends of the main frame, wherein each side frame has a lower end thereof extending downward from the main frame; a plurality of electrodes installed to be exposed to outside on the main frame; an electrode measurement part for measuring apparent chargeability of the target ground by applying power for measurement to the plurality of electrodes; and a main processor for calculating a weight ratio of a metal component of the target ground on the basis of the apparent chargeability measured by the electrode measurement part and calculating a volume ratio of the metal component of the target ground on the basis of the calculated weight ratio of the metal component.

Abstract: Provided are a high-strength medium-low temperature asphalt modifier including: i) a styrenic thermoplastic elastomer powder which is frozen ground to 0.1 to 1 mm at a low temperature, wherein the styrenic thermoplastic elastomer is selected from a polystyrene-polybutadiene-polystyrene block copolymer (SBS), a styrene-butadiene rubber (SBR), a styrene-isoprene-styrene block copolymer (SIS), a styrene-ethylene-butylene-styrene block copolymer (SEBS), and a styrenic thermoplastic elastomer (STE), ii) a high-boiling point process oil, iii) a rosin resin tackifier modified by an aliphatic hydrocarbon, iv) a polymer-silica nanocomposite, and v) an asphalt deodorant, an asphalt mixture prepared using the same, and a construction method thereof.