Study on properties of recycled tire rubber modified asphalt mixtures using dry process

To minimize waste tires pollution and improve properties of asphalt mixtures, properties of recycled tire rubber modified asphalt mixtures using dry process are studied in laboratory. Tests of three types asphalt mixtures containing different rubber content (1%, 2% and 3% by weight of total mix) and a control mixture without rubber were conducted. Based on results of rutting tests (60 °C), indirect tensile tests (−10 °C) and variance analysis, the addition of recycled tire rubber in asphalt mixtures using dry process could improve engineering properties of asphalt mixtures, and the rubber content has a significant effect on the performance of resistance to permanent deformation at high temperature and cracking at low temperature.     

废旧轮胎橡胶粉改性沥青性能研究

分析了制备橡胶粉改性沥青的湿法工艺,对多种掺量橡胶粉的橡胶粉改性沥青的各项性能进行了分析与对比,研究了橡胶粉掺量对改性沥青的影响,发现橡胶粉对沥青的改性效果非常明显,橡胶粉改性沥青的多项性能有大幅提高,满足公路建设需要。     

关于沥青玛脂碎石混合料试验方法的探究

采用旋转压实方法进行上面层沥青玛脂碎石混合料配合比的研究,通过一系列试验,选择并确定了合适的旋转压实的试验参数,为今后沥青路面施工提供了科学数据。     

沥青玛(王帝)脂碎石混凝土施工工艺

针对公路建设的发展,提出了一种比较新型的沥青路面结构,即沥青玛(王帝)脂碎石混凝土路面结构,对该路面的原材料选择及配合比设计进行了探讨,并详细地阐述了该路面的施工工艺,以加快我国公路建设步伐.     

废胎胶粉对沥青的改性机理研究

结合耐久性公路路面对橡胶改性沥青材料的要求,采用红外光谱法、DSC、荧光显微镜等方法对改性橡胶沥青进行显微结构分析和聚集态结构分析,以探究废胎胶粉在橡胶沥青中的作用机理,为下一步深化研究和大规模实际应用提供支持.     

橡胶沥青同步碎石封层施工方案探讨

结合工作经验,对橡胶沥青同步碎石封层施工技术进行了探讨,具体对橡胶沥青应力吸收层施工、混凝土抛丸处理、灌缝施工等关键技术作了论述,为类似工程施工提供了参考。     

沥青玛脂钢渣混合料性能试验研究

根据多年海外工程实践经验,通过试验探讨了利用废弃钢渣制作沥青玛脂混合料的可行性,试验表明利用钢渣作为集料骨料可以起到增大马歇尔稳定度、抗拉强度,降低水损害的作用。     

Determination of the optimum conditions for tire rubber in asphalt concrete

The Taguchi method was used to determine optimum conditions for tire rubber in asphalt concrete with Marshall Test. The tire rubber in asphalt concrete was explored under different experimental parameters including tire rubber gradation (sieve #10–40), mixing temperature (155–175 °C), aggregate gradation (grad. 1–3), tire rubber ratio (0–10% by weight of asphalt), binder ratio (4–7% by weight of asphalt), compaction temperature (110–135 °C), and mixing time (5–30 min). The optimum conditions were obtained for tire rubber gradation (sieve #40), mixing temperature (155 °C), aggregate gradation (grad. 1), tire rubber ratio (10%), binder ratio (5.5%), compaction temperature (135 °C), mixing time (15 min).     

Laboratory comparison study for the use of stone matrix asphalt in hot weather climates

Stone matrix asphalt (SMA) is a hot mixture asphalt consisting of a coarse aggregate skeleton and a high binder content mortar. It was developed in Germany during the mid-1960s and it has been used in Europe for more than 20 years to provide better rutting resistance and to resist studded tyre wear. The main objective of this research study was to compare the performance of the normally used dense graded asphalt mixtures, named in this research as control mixtures, and SMA mixtures. Samples from both mixtures were fabricated at their optimum asphalt contents that were 5.3% for control mixtures and 6.9% for SMA mixtures. Comparison performance tests that included Marshall stability, loss of Marshall stability, split tensile strength, loss of split tensile strength, resilient modulus, fatigue, and rutting testing were performed on both mixtures. Test results showed that although the control mixtures have higher compressive and tensile strengths, SMA mixtures have higher durability and resilience properties. In addition, although the research could not prove the superiority of SMA in rutting resistance because of the limited sample sizes, field performance of SMA mixtures proves its superiority. Therefore, especially in hot weather climates, these properties, (durability, resilience and rutting resistance) give SMA mixtures advantages over dense graded mixtures.     

废胎胶粉目数和加工时间对橡胶沥青性能影响

为了深入研究材料因素和加工因素影响橡胶沥青性能的变化规律,分别以目数和加工时间为自变量,以改性后的沥青性能指标为因变量进行了大量室内实验,通过改性后沥青性能指标的变化规律分析目数和加工时间的影响作用,并从胶粉和沥青反应机理的角度解释了指标变化规律的现象。     

机拌沥青碎石混合料质量的控制

结合实际工作经验,对影响沥青碎石混合料路面机械化施工质量的原因进行简单分析,从人员、材料、机械、实验、自然条件等方面进行论述,提出了严格控制施工中的各环节,并针对性的给出了解决方法。     

废旧轮胎橡胶改性水泥基材料的试验研究

通过添加高性能矿物掺合料和对废旧轮胎橡胶颗粒进行聚合物乳液湿润的方法来改善橡胶颗粒与水泥基体的界面.试验结果表明,混凝土和砂浆的抗压强度和表观密度随橡胶掺量的增加而降低,但添加适量高性能矿物掺合料、对胶粉颗粒进行聚合物乳液润湿处理,一定程度上均能提高橡胶砂浆的密实度和强度,且对于较大胶粉掺量的橡胶砂浆,后者处理效果更显著.     

橡胶沥青混凝土路用性能的试验研究

为了研究橡胶沥青混凝土的路用性能,结合实际工程项目在室内进行了橡胶沥青混凝土的配合比设计及相关性能试验,试验结果表明:橡胶沥青混合料具有较好的高温稳定性,低温抗裂性和水稳定性,能够提高路面的使用性能、延长道路的使用寿命。     

SBS与废胶粉复合改性沥青性能试验研究

通过SBS与废胶粉沥青复合改性的几种不同配方试验,并以马来酸酐为增溶剂,以SDJ—C1型相容稳定剂来增强改性效果,分析了高温搅拌、剪切熔融的物理改性与接枝反应的化学改性相结合的复合改性机理以及用SBS、废胶粉复合改性后沥青的针入度、软化点、延度等主要性能改善作用,提出SBS、废胶粉复合改性沥青的掺量范围。     

橡胶沥青超薄磨耗层层间粘结试验研究

选取SBS改性沥青、均相废橡胶沥青以及复合均相橡胶沥青等4种改性粘层油,根据室内组合试件,模拟层间,对材料的应用效果进行分析,确定了较好的材料以及材料的最佳用量。     

橡胶沥青质量控制方法

结合西铜高速路面施工,对橡胶沥青的性能、优点以及橡胶粉和沥青的作用机理和生产工艺进行了简单探讨,并提出了质量控制方法,以改善路面使用性能,同时推广橡胶沥青的应用。     

废胶粉用于防水改性沥青的研究

研究了不同废胶粉及其不同掺量对沥青的改性效果，认为胶粉添加量在18％～24％范围内，沥青性能改善明显；体系中添加配合剂时，性质会发生一系列的变化：软化点升高，低温柔性有所改善。     

二次添加橡胶粉对橡胶沥青性能的影响

橡胶沥青被广泛应用到沥青路面施工中,如下封层、上封层及热沥青混合料面层中。但橡胶沥青在高温储存条件下,其性能指标会出现一定程度衰减。本文通过在衰减的橡胶沥青中二次添加橡胶粉的方法,重新提升橡胶沥青的相关性能。     

橡胶在路用沥青改性中的应用

分析了橡胶粉及其对沥青的改性机理,并对橡胶沥青对路用性能的改善加以探讨,指出橡胶沥青具有较好的弹性和弹性恢复性能、较低的温度敏感性、较好的抗变形能力和抗疲劳开裂性能,且适用面广,在道路建设中有广阔的发展前景。     

透水沥青碎石基层配合比设计研究

指出了改性沥青透水碎石基层室内试验在级配选择、空隙率的测定、最佳沥青含量确定及高温稳定性方面应注意的问题，并对普通沥青透水碎石配合比设计进行了试验和尝试，以使其更加经济、合理地应用于道路工程中。