温拌无纤维SMA沥青混合料应用研究
发布时间：2018-08-31 19:02
【摘要】：SMA沥青混合料作为一种性能优良的路面材料,以其具有抗高温、低温稳定性,良好的水稳定性,良好的耐久性和表面功能,被广泛应用。但是SMA混合料也存在拌合成型温度高,生产施工耗能大,废弃粉尘排放多等问题,同时普通SMA混合料中一般加入纤维稳定剂,由于纤维的加入导致成本增加、拌合不充分、增加生产施工难度等问题。为解决以上问题,本文对一种新型的温拌无纤维SMA沥青混合料进行室内试验研究。文章首先对原材料的各项技术指标进行测试分析,选取符合规范要求的原材料,并确定本研究室内试验所需的试验方法与步骤。先进行了普通热拌SMA混合料配合比设计,在此基础上,进行温拌无纤维SMA混合料配合比设计,并利用谢伦堡析漏试验检验沥青用量,最终确定出温拌无纤维SMA混合料级配组成和拌合温度。其次,利用旋转压实仪通过室内压实试件,绘制密实曲线,通过旋转压实能量指数CEI、Nini和Ndes在半对数坐标上的密实度斜率k和密实能量指数TDI来评价温拌无纤维SMA沥青混合料的的旋转压实特性,并与普通热拌SMA混合料(热拌,有纤维,不加温拌剂)和热拌低温SMA混合料(成型温度140℃,有纤维,不加温拌剂)进行对比研究。同时分析不同温度、不同油石比条件下的旋转压实特性变化规律。然后,对温拌无纤维SMA混合料基本路用性能进行详细的测试,包括高温稳定性、低温抗裂性、水稳定性等,并与普通热拌SMA混合料的路用性能进行对比研究,结果表明:虽然路用性能略逊色,但是完全符合相应的规范要求,满足路面使用要求。最后,分别对温拌无纤维SMA混合料和普通热拌SMA混合料的经济效益和社会效益对比研究分析,结果表明:在经济和社会效益上,温拌无纤维SMA混合料存在很大的优势。
[Abstract]:As a kind of pavement material with excellent performance, SMA asphalt mixture is widely used for its high temperature resistance, low temperature stability, good water stability, good durability and surface function. However, SMA mixture also has some problems, such as high mixing temperature, large energy consumption in production and construction, waste dust emission and so on. At the same time, fiber stabilizer is generally added to the ordinary SMA mixture, because of the increase of cost caused by the addition of fiber, the mixing is not sufficient. Increase the difficulty of production construction and other issues. In order to solve the above problems, a new type of warm-mixed fiber-free SMA asphalt mixture is studied in laboratory. In this paper, the technical indexes of raw materials are tested and analyzed, the raw materials that meet the specifications are selected, and the test methods and steps for the laboratory test are determined. In this paper, the mixture ratio design of ordinary hot-mixed SMA mixture is carried out first, and on this basis, the mixture ratio design of warm mixed non-fiber SMA mixture is carried out, and the asphalt content is tested by Schelenburg leakage analysis test. Finally, the grading composition and mixing temperature of warm mixing fiber free SMA mixture were determined. Secondly, the compaction curve is drawn through the indoor compaction specimen by using the rotary compaction instrument. The compactness slope k and compaction energy index TDI of the rotational compaction energy index CEI,Nini and Ndes in semi-logarithmic coordinates are used to evaluate the rotational compaction characteristics of warm mixed fibrous SMA asphalt mixture, and to evaluate the rotational compaction characteristics of warm mixed fibrous SMA asphalt mixture. A comparative study was carried out between hot mix and low temperature SMA mixture (molding temperature 140 鈩，
本文编号：2215882
[Abstract]:As a kind of pavement material with excellent performance, SMA asphalt mixture is widely used for its high temperature resistance, low temperature stability, good water stability, good durability and surface function. However, SMA mixture also has some problems, such as high mixing temperature, large energy consumption in production and construction, waste dust emission and so on. At the same time, fiber stabilizer is generally added to the ordinary SMA mixture, because of the increase of cost caused by the addition of fiber, the mixing is not sufficient. Increase the difficulty of production construction and other issues. In order to solve the above problems, a new type of warm-mixed fiber-free SMA asphalt mixture is studied in laboratory. In this paper, the technical indexes of raw materials are tested and analyzed, the raw materials that meet the specifications are selected, and the test methods and steps for the laboratory test are determined. In this paper, the mixture ratio design of ordinary hot-mixed SMA mixture is carried out first, and on this basis, the mixture ratio design of warm mixed non-fiber SMA mixture is carried out, and the asphalt content is tested by Schelenburg leakage analysis test. Finally, the grading composition and mixing temperature of warm mixing fiber free SMA mixture were determined. Secondly, the compaction curve is drawn through the indoor compaction specimen by using the rotary compaction instrument. The compactness slope k and compaction energy index TDI of the rotational compaction energy index CEI,Nini and Ndes in semi-logarithmic coordinates are used to evaluate the rotational compaction characteristics of warm mixed fibrous SMA asphalt mixture, and to evaluate the rotational compaction characteristics of warm mixed fibrous SMA asphalt mixture. A comparative study was carried out between hot mix and low temperature SMA mixture (molding temperature 140 鈩，
本文编号：2215882
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