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Application of image analysis tools in Matlab to better estimate the degree of binder coverage in rolling bottles test
Road Materials and Pavement Design ( IF 3.7 ) Pub Date : 2020-10-21 , DOI: 10.1080/14680629.2020.1834441
Syed Bilal Ahmed Zaidi 1 , James Grenfell 2 , Gordon Airey 3 , Naveed Ahmad 1 , Imtiaz Ahmed 4 , Ayyaz Fareed 1 , Ahmed Abed 3
Affiliation  

In asphalt mixture, a strong affinity between binder and aggregates is of prime importance, especially under conditions susceptible to moisture damage. Out of various modifiers/additives used in the literature, the hydrated lime (HL) has been reported as most suitable for improving affinity between binder and aggregates. Therefore, this study attempted to quantify the affinity of HL modified mastics with different aggregates under moist conditions. Further, in order to measure the affinity, the rolling bottle test (RBT) was used, which is also reported as one of the best empirical techniques for assessment of moisture susceptibility. However, in the RBT, the assessment for affinity is generally made through visual inspection by two experienced operators as per a standard procedure which can also be the major drawback of this technique in terms of less reliability and repeatability. Thereby, to reduce this deficiency, the image analysis (with no special setup) was also carried out through the use of the MATLAB program. The results as obtained from image analysis were then compared with the results of visual observation. Both were found to be very similar to each other. Hence, the RBT could be used confidently for the comparison of different binder/aggregate combinations. Also, the RBT results indicated that the HL addition was beneficial with granite, basalt and greywacke aggregates, but it did not have any effect with limestone aggregates. Further, the 10% HL substitution was found to be more efficient than 20% HL substitution as both substitutions showed a similar effect in most of the studied combinations.



中文翻译:

Matlab中图像分析工具的应用,以更好地估计滚瓶试验中粘合剂的覆盖程度

在沥青混合料中,粘合剂和骨料之间的强亲和力是最重要的,尤其是在易受水分损害的条件下。在文献中使用的各种改性剂/添加剂中,据报道,熟石灰 (HL) 最适合提高粘合剂和骨料之间的亲和力。因此,本研究试图量化 HL 改性胶粘剂在潮湿条件下与不同聚集体的亲和力。此外,为了测量亲和力,使用了滚瓶试验(RBT),这也被报道为评估水分敏感性的最佳经验技术之一。然而,在 RBT 中,亲和力评估通常由两名经验丰富的操作员按照标准程序进行目视检查,这也是该技术在可靠性和可重复性较低方面的主要缺点。因此,为了减少这一缺陷,图像分析(无需特殊设置)也通过使用 MATLAB 程序进行。然后将从图像分析获得的结果与目视观察的结果进行比较。两者被发现彼此非常相似。因此,RBT 可以自信地用于比较不同的粘合剂/骨料组合。此外,RBT 结果表明,HL 添加对花岗岩、玄武岩和灰瓦骨料有益,但对石灰石骨料没有任何影响。更远,

更新日期:2020-10-21
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