Study on the road performance of brucite powder modified AC-20C asphalt mixture
In the field of road engineering, improving the performance of asphalt mixtures has always been the focus of research. Slag sand and brucite powder are two industrial by-products. Their application in asphalt mixtures provides new possibilities for improving the road performance of pavements. This article will explore the potential improvement effects of slag sand-brucite powder reinforced AC-20C asphalt mixture in terms of high temperature stability, low temperature crack resistance, water stability and wear resistance.
Enhanced high temperature stability
The high heat resistance of slag sand and the addition of brucite powder are expected to significantly improve the high-temperature stability of asphalt mixtures. Brucite powder can improve the flow resistance and deformation resistance of the mixture and reduce the formation of ruts at high temperatures. Improvement of low temperature crack resistance
The addition of brucite powder helps to improve the low-temperature toughness of asphalt mixture and prevent the formation of low-temperature shrinkage cracks. Its fibrous structure plays a bridging role in the mixture, effectively hindering the expansion of microcracks. Improved water stability
Although slag sand may present water stability challenges, by optimizing the grading and combining it with brucite powder, the internal structure of the mix can be improved, the void content can be reduced, the continuity of the asphalt film can be improved, and the water stability can be enhanced.
The high hardness of slag sand and the addition of brucite powder will jointly improve the wear resistance of the road surface and extend the service life of the road surface.
The reinforcement effect of brucite powder is expected to improve the fatigue resistance of the mixture under repeated loads, especially for heavy traffic sections. Laboratory evaluation
To evaluate the performance of this new asphalt mixture, a series of laboratory tests will be conducted, including Marshall stability test, rutting test, low temperature bending test, water immersion test and fatigue test.
While ensuring the practicality and sustainability of new formulations, the economic and environmental benefits of materials must also be considered to achieve the dual goals of cost-effectiveness and environmental friendliness. The combined use of slag sand and brucite powder provides significant improvements in the road performance of AC-20C asphalt mixture. Through precise material proportioning and process optimization, this new mixture is expected to exhibit excellent performance in road engineering while meeting economic and environmental requirements.
With the continuous deepening of research on slag sand-brucite powder modified asphalt mixture, it is expected to provide more innovative solutions for road construction and promote the development of road engineering materials towards a more efficient, durable and environmentally friendly direction.