[Retracted] The Application of Nano-Calcium Carbonate in the Technology of Improving Road Petroleum Asphalt

Table 1

The influence of modified asphalt content on the ductility of petroleum asphalt.

(%)	<20 mm	20∼40 mm	40∼60 mm	60∼80 mm	>80 mm
10	63.23	73.3	68.23	52.1	54.5
15	58.07	56.21	55.78	56.11	51.07
20	46.35	49.1	54.53	53.27	50.95