Laboratory Investigation of the Water Damage Resistance of Tuff Asphalt Mixture Modified with Additives

Abstract

To improve the water damage resistance performance of a tuff asphalt mixture, a tuff mixture with cement and a liquid anti-stripping agent was used as the research object, and limestone and tuff mixtures without additives were selected as contrast samples. Through an improved boiling test and a water stability test before and after aging, the modification effect of the tuff mixture with additives of different types and contents on water damage resistance was evaluated to obtain the appropriate type and content of additives. On this basis, the other road performance measures of the selected mixture were further evaluated by immersion rutting and beam bending tests to verify the modification effect of the additive on the tuff mixture. Results showed that adding the appropriate cement content to the tuff mixture provided excellent resistance to the water damage effect. An optimal content of 2% cement additive in the mixture was obtained, and its high-temperature anti-rutting and low-temperature bending performance were also verified. Adhesion between tuff aggregates and asphalt polymer under water conditions was significantly improved and close to that of limestone aggregates. The modification effect of water stability after mixture aging was better than that of the anti-stripping agent. The residual stability and freeze–thaw splitting strength ratio of 2% cement content mixture were increased by about 21.5% and 16.7%, respectively, compared with those of the tuff mixture control.

Water Damage Resistance of Tuff Asphalt Mixtures with Admixtures Based on Surface Energy Theory

“…SBS-modified asphalt was selected as the binder of the asphalt mixture, which came from the Zhejiang Transportation Resources Investment Co., Ltd., Hangzhou, China [15]. The technical indexes of SBS-modified asphalt binder were tested by referring to the test methods of the JTG E20-2011 specifications [21]; they are provided in Table 1, indicating that the SBS-modified asphalt binder conformed to the requirements of the JTG F40-2004 specifications [22,23].…”

“…For instance, Goual et al [14] investigated the strength of tuff-limestone sand mixtures with different cement contents through laboratory tests, and the results indicated the possibility of the development on asphalt pavement materials containing tuff in Algeria. Zhang et al [15] evaluated the performance of a tuff asphalt mixture after adding cement and a liquid antistripping agent through laboratory tests, and the results indicated that the addition of admixtures could improve the adhesion property and water stability of the tuff mixture.…”

“…In summary, the exploration of the adhesion property of asphalt-aggregate mixtures from the perspective of surface energy theory and the evaluation of the water damage resistance of the mixtures have become research hotspots. However, in view of the insufficiency of the adhesion of tuff as aggregates to asphalt after water contact, although the water damage of tuff common asphalt mixtures as the lower asphalt course of pavement has been evaluated by macroscopic tests [15], the improvement evaluation of the water damage resistance of tuff SBS-modified asphalt mixtures as the other asphalt course of pavement using surface energy theory has not been conducted owing to the difference in the origin of tuff stone and its properties. In this regard, this study took the typical graded tuff mixture in the middle asphalt course of pavement as the object and planned to enhance the adhesion property of tuff aggregates to SBS-modified asphalt polymers with admixtures, including cement and liquid antistripping agents.…”

Freeze–Thaw Damage Mechanism Analysis of SBS Asphalt Mixture Containing Basalt Fiber and Lignocellulosic Fiber Based on Microscopic Void Characteristics

“…Freeze-thaw cycles, water action, and traffic are the main distresses of asphalt pavements in seasonal frozen regions [10,11]. These factors can lead to the deterioration of the pavement, causing cracks, rutting, and other forms of damage.…”

New Developments in Asphalt Pavement: Enhancing Durability, Sustainability, and Cost-Effectiveness

“…This is a new form of technology used in the construction and paving of asphalt pavement. A second example of asphalt pavement is described in the article entitled "Laboratory investigation of the water damage resistance of tuff asphalt mixture modified with additives" [2]. In this case, to improve the water damage resistance of a tuff asphalt mixture, cement and liquid anti-stripping agents were added to the aforementioned tuff asphalt mixture, and limestone and tuff mixtures without additives were used as comparison samples.…”