Abstract
As an asphalt modifier, diatomite could improve the road performance of asphalt. The adsorption property of diatomite was varied with different compositions of asphalt. The result suggested that diatomite with a developed mesoporous structure could effectively adsorb the lower molecular group and lower polar aromatic molecules, whereas it could not adsorb the asphaltene and resins. In addition, the adsorption amount was related to the curing time. The anchorage was formed after certain molecules in asphalt were adsorbed by diatomite and improved the property of asphalt mastic.
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