<\/p>\n
Assessment of indirect tensile stress and
\ntensile\u2013strength ratio and creep compliance
\nin HMA mixes with micro-silica and PMB
\nhttps:\/\/doi.org\/10.1515\/eng-2022-0527
\nreceived June 08, 2023; accepted September 01, 2023
\nAbstract: This study aims to ascertain the effects of
\npolymer-modified bitumen (PMB) and to utilize mineral
\nfiller with micro-silica (MS) on various properties of hotmix
\nasphalt (HMA). In this work, three specimens of an
\nasphalt-concrete mixture were prepared. The first specimen
\nrepresents a control mixture, the second specimen contains
\nMS at rates 15, 30, and 45% by the total weight of the total
\naggregate as filler, and the third specimen contains MS and
\nPMB with 4% novolac by the weight of bitumen and 15%
\nhexamine by the weight of the novolac. The properties of
\ndesigned mixes were evaluated using the indirect tensile
\nstrength test, tensile\u2013strength ratio, and creep compliance.
\nThe test results showed an increase in the resistance of
\nasphalt concrete to moisture damage, a reduction influence
\nof water on asphalt concrete properties, creep compliance
\nvalues indicating growing stiffness for asphalt mixture, and
\nenhanced fatigue life. In conclusion, using 45% MS and PMB
\nimproved the properties of HMA and provided long-lasting
\nmixtures for highway construction<\/p>\n