Assessing soil index parameters to determine the frost susceptibility of crushed rock aggregates

In Norway, crushed rock aggregates are widely used in all layers of pavement infrastructures. Frost heave severely affected the Norwegian road network during cold winters 2009/10 and 2010/11, including newly built roads. 2016, Protection for Roads Railways project (FROST) was set up part to investigate frost susceptibility aggregates. Twenty-three tests were performed on 0–4 mm fraction with nine types different rock, which 2 series measured at crushing stages a production line. The succeeded expand knowledge aggregates, using segregation potential as criterion. However, cost time necessary laboratory work important. Since budget construction rehabilitation variable, methodology estimate soil index properties tested. A investigation carried out compare potentials determined (SP0 lab) those calculated normalized equations (SP0.n), requires only four parameters: specific surface area fine fraction, mean grain-size diameter water content, liquid limit being <75 μm. Results showed good correlation between SP0 lab SP0.n. also strong <8 m2/g, case 19/23 samples. High estimations (≈12.5 m2/g) found early stage believed be cause by weak mineral content enrichment and/or grain-surface irregularities fraction. conclusion, this study confirms that estimation aggregate from is possible reliable. relationship developed determine promising should validated furthermore reinforce relationship.