Abstract: In order to further evaluate the pavement performance of foamed asphalt cold recycled mixture, the pavement performance indexes of foamed asphalt cold recycled mixture with different foamed asphalt content were compared and analyzed. Six technical indexes were selected as evaluation indicators, which included splitting strength, strength rate of dry and wet splitting, dynamic stability, TSR, residual stability, and fatigue life. A pavement performance evaluation system for foamed asphalt cold recycled mixture was established based on efficiency coefficient method. The pavement performance of foamed asphalt cold recycled mixture was evaluated scientifically, and the optimal content of the foamed asphalt in the foamed asphalt cold recycled mixture was determined. The results show that the optimum foaming conditions of asphalt are as follows: the temperature is 155 ℃, the water consumption is 3.0%, and the optimum moisture content is 6.8%. The comprehensive evaluation system of pavement performance for foamed asphalt cold recycled mixture based on the efficiency coefficient method is more accurate and reliable. The total efficiency coefficients of the five schemes is in the order of A3＞A2＞A4＞A1＞A5.The pavement performance of foamed asphalt cold recycled mixture with foamed asphalt content of 3.0% is relatively better.

Key words: highway engineering, cold recycled mixture, foamed asphalt, efficiency coefficient method, performance evaluation

摘要： 为进一步科学化评价泡沫沥青冷再生混合料路用性能，对比分析了不同泡沫沥青含量下泡沫沥青冷再生混合料各项路用性能指标。选取了劈裂强度、干湿劈裂强度比、动稳定度、冻融劈裂强度比、残留稳定度和疲劳寿命等6项技术指标作为评价指标，建立了基于功效系数法的泡沫沥青冷再生混合料路用性能评价模型，科学评价了泡沫沥青冷再生混合料路用性能，并确定了泡沫沥青冷再生混合料中泡沫沥青的最佳含量。结果表明：沥青最佳发泡条件为：温度155 ℃，用水量3.0%；最佳含水率为6.8%；基于功效系数法的泡沫沥青冷再生混合料路用性能综合评价体系较为准确、可靠，5种方案总功效系数大小顺序为A3＞A2＞A4＞A1＞A5；泡沫沥青含量为3.0%时，泡沫沥青冷再生混合料的路用性能相对更好。

关键词: 道路工程, 冷再生, 泡沫沥青, 功效系数法, 性能评价