Laboratory evaluation of resistance to moisture damage in asphalt mixtures

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• 作者：Ahmed Ebrahim Abu El-Maaty Behiry
• 关键词：MS ; marshall stability ; Vair ; air voids ratio ; TW ; tap water ; SW ; sea water ; QM ; marshall quotient ; RMS ; retained marshall stability ; d ; day ; Mr ; resilience modulus ; ITS ; indirect tensile strength ; TSR ; tensile strength ratio ; NT ; non-treatment ; CT ; cemen
• 刊名：Ain Shams Engineering Journal
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：4
• 期：3
• 页码：351-363
• 全文大小：852 K

文摘

Moisture damage in asphalt mixtures refers to loss in strength and durability due to the presence of water. Egypt road network is showing severe deterioration such as raveling and stripping because the bond between aggregates and asphalt film is broken due to water intrusion. To minimize moisture damage, asphalt mixes are investigated to evaluate the effect of air voids, degree of saturation, media of attack and the conditioning period. Two medias of attack are considered and two anti-stripping additives are used (hydrated lime and Portland cement). The retained Marshall stability and tensile strength ratio are calculated to determine the resistance to moisture damage. The results showed that both lime and cement could increase Marshall stability, resilient modulus, tensile strength and resistance to moisture damage of mixtures especially at higher condition periods. Use of hydrated lime had better results than Portland cement.