### Road Salt Impact
[43] investigated the effect of water and brine (NaCl, 5 and 10% concentrations; Na2 SO4, 5% concentrations) on strength loss (modified asphalt (45, 80, and 55) and fine-graded asphalt mixtures were investigated). The main aim was to check strength variability (by ITT test) through various soaking combinations. [PERSON] and [PERSON] [44] investigated the impact of water and road salt on the degradation of five mixtures (AC 16W 50/70, AC 22 WMS Pmb 25/55-60, and 25/55-80 HIMA). The authors proposed an experimental method of soaking the material and testing it using the 4-PB test. Mass changes and stiffness modulus variability considering various soaking times (for 2 days and 21 days) were studied. Moreover, salt-induced degradation and its penetration into the mixture using X-ray imaging were analyzed and presented. [PERSON] et al. [45] have summarized the state of the art related to research on road salt. The authors presented various methods of analyzing these issues, ranging from mechanical tests (among which the static ITT or dynamic ITFT indirect tensile test were most often used) to microscope or computer tomograph imaging usage. In the review, the importance of mixture degradation caused by road salt was repeatedly emphasized. Moreover, most of the research has been focused on AC 13 or AC 16 mixes based on soft common road asphalt or modified ones, intended for the surface course or the binding course. Based on the literature review, it was emphasized that water, frost, and road salt significantly affect asphalt mixtures, causing their degradation. Moreover, it contributes to pavement deterioration. The conducted literature review revealed that existing articles are related to the assessment of material degradation caused primarily by water and frost, and rarely, road salt. Most of them were performed using indirect tensile tests. In these tests, various combinations of freeze-thaw cycles (water and frost) or soaking in a salt solution for several days (mainly NaCl concentrations of 5, 10, and 15%) were considered. So far, the studies have not analyzed the conditions of de-icing agents' impacts for longer (than 7 days) or higher levels of brine concentrations (especially those that may occur in winter after intensive salting of the pavement, ex. 20% or 25%). In addition, there are a few studies listed using other tests than the indirect tensile test to assess degradation, such as 4-PB-PR (which corresponds with pavement layer behavior under load). So far, no other different levels of soaking temperature in brine have been investigated (other than those resulting from the analogy to the MMA test according to resistance to water and frost). Also, no simulations of solution flow during soaking were seen in the articles. Furthermore, the review demonstrated that, thus far, attention has been paid primarily to mixtures intended primarily for the surface course or binding course of the AC 13 or AC 16 type, containing primarily common 50/70 or occasionally modified 45/80-55 asphalt. There have been no studies concerning coarse-grained mixtures, such as AC-22, intended for the base course or binding course (where the degradation caused by water, frost, or salt may also occur). In addition, there are no articles that comprehensively address the topic of asphalt mix degradation caused by environmental factors based on different types of asphalt and technologies (ex. HMA and WMA). Moreover, there is a lack of articles that consider environmental factors' impact on mix and pavement construction durability. Because of the aforementioned issues, the authors looked into the effects of water, frost, and road salt on the degradation of various mineral-asphal mixtures. The article's investigation considered the different types of asphalt and production technology. The primary goal was to determine material degradation using the 4-PB test while taking environmental conditions for Polish roads into account.