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| 摘要: |
| 采用单轴贯入试验,测定了泡沫沥青再生混合料在不同条件下的抗剪强度.研究表明：集料级配在规定范围内时,泡沫沥青冷再生混合料抗剪强度最高;加入1.5%（质量分数）的水泥可以使泡沫沥青冷再生混合料抗剪强度提高5倍左右;沥青的发泡效果决定了对应最大抗剪强度的沥青用量,发泡效果越好,对应最大抗剪强度的沥青用量越小;沥青黏度越高,相同沥青含量下泡沫沥青冷再生混合料的抗剪强度就越高;采用40℃烘箱养生3 d的试件其抗剪强度与自然养生10 d的试件相当;温度从40℃升至60℃,泡沫沥青冷再生混合料抗剪强度则下降一半. |
| 关键词: 泡沫沥青 冷再生混合料 抗剪强度 级配 养生 |
| DOI： |
| 分类号:U414 |
| 基金项目: |
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| Experimental Study on Shearing Properties of Cold-Recycled Mixtures Using Foamed Asphalt |
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LI Xiu-jun
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| Abstract: |
| By using uniaxial penetration test,shearing strength of cold-recycled mixtures of foamed asphalt(CRMFA) under different conditions was determined.The test result shows that the shearing strength of CRMFA is the highest when the gradation of the mixture is in the specified range.With 1.5%(by mass) of cement,shearing strength of CRMFA is increased 5 times.The asphalt content corresponding to the highest shearing strength is dependent on the asphalt foam effect.The better the foam effect is,the less the asphal... |
| Key words: foamed asphalt cold-recycled mixtures shearing strength gradation curing |
