抗剥落剂对泡沫沥青冷再生混合料水稳定性能改善研究

由于泡沫沥青冷再生路面水稳定性能较差，掺加抗剥落剂可以有效改善普通沥青路面的抗水损能力，针对此问题探究向泡沫沥青冷再生混合料中掺加抗剥落剂来提高其水稳定性能的可行性。以一种非胺类抗剥落剂为研究对象，对不同抗剥落剂掺量下的沥青进行发泡试验和3大指标试验，对泡沫沥青冷再生混合料进行相关水稳定性试验。结果表明：抗剥落剂的最佳掺量为沥青质量的0.5%，掺加抗剥落剂后，在标准试验条件下，沥青的针入度增大，延度和软化点降低，泡沫沥青冷再生混合料的水稳定性能明显提高，空隙率减小了3%，浸水残留稳定度比和5次冻融循环后的强度比均提高10%以上。

Improvement on water loss resistance of foamed asphalt cold recycled mixture by anti-stripping agent

Water resistance performance of the foamed asphalt cold recycled pavement is insufficient. The anti-stripping agent can effectively improve the water loss resistance of the ordinary asphalt pavement. The feasibility of adding anti-stripping agent to the foamed asphalt cold recycled mixture for the improvement of water resistance was explored. A non-amine anti-stripping agent was used as the research object. The asphalt with different anti-stripping agents was tested for foaming and three major indices. The mixture was tested for relevant water stability tests. The results show that the optimum amount of anti-stripping agent is 0.5% of asphalt on a weight basis. After the addition of the anti-stripping agent, under the standard test conditions, the elongation and softening point is reduced, and the penetration of the asphalt is increased. The water loss resistance of the foamed asphalt cold recycled mixture is obviously improved, and the residual stability ratio and the strength ratio after five freeze-thaw cycles are increased by more than 10%.