温拌沥青混合料的试验研究
发布时间：2018-10-23 06:54
【摘要】：“温拌”属于道路工程建设行业中的一项环保节能新技术，研究温拌工艺可以解决能源过度消耗带来的环境污染问题，具有重大的社会效益。本文基于室内实验，研究施工温度变化对感温性材料沥青的性能影响，低温施工诱发沥青混合料性能的变化规律。从改变矿料级配、改进设计方法、优选沥青结合料类型等处理方式，配制出路用性能优异的温拌沥青混合料。 温拌工艺通常分为有机温拌剂降粘型、表面活性剂型、泡沫沥青型三类。本文针对泡沫沥青型及表面活性剂型温拌工艺，设计系列实验。理论上探讨施工温度降低对沥青流变力学性能的影响，分析实验数据回归计算方程优化沥青选择方法；实验验证了粘温曲线法确定施工温度不适用于温拌，探讨由混合料工作和易性确定施工温度；析因设计法设计沥青混合料性能试验，找出影响显著的因素，根本上改进沥青混合料性能。对典型工艺进行节能减排分析，并跟踪实际工程安排具体检测，对比实际值与理论值修订能耗公式，评价温拌工艺节能减排效果。 参考AASHTO规范实验评价沥青胶凝材料，包括旋转粘度、动态剪切流变、弯曲梁流变等实验。胶凝材料实验表明：温拌沥青潜在抗车辙性能降低，同时低温抗裂性能增强，施工温度降低40℃，沥青高温连续等级应提升一级（6℃）。温拌沥青混合料工作和易性确定施工温度方法可行，大量配合比试验基础上修订Superpave体积设计法和马歇尔设计法，以适宜于温拌沥青混合料设计。优化后的温拌沥青混合料满足规范要求，对比试验表明其性能等效甚至优于热拌沥青混合料。节能减排分析表明温拌工艺节能率37%，减排量降低30%。 系统性实验研究的基础上，通过数理统计方法、物理数学模型分析，验证了温拌工艺的实用性、产品性能的优越性，推广温拌工艺能够带来巨大的经济效益及社会环保效益。研究工作得到沧州市市政工程公司的鼎力支持，，实验研究的基础上进行了大量的工程实践，科研成果得到市政工程局的广泛推广。
[Abstract]:"warm mixing" is a new technology of environmental protection and energy saving in road engineering construction industry. The study of warm mixing technology can solve the problem of environmental pollution caused by excessive consumption of energy, and has great social benefits. Based on the laboratory experiments, this paper studies the effect of temperature change on the performance of thermally sensitive asphalt, and the variation law of asphalt mixture performance induced by low temperature construction. By changing the gradation of mineral aggregate, improving the design method and selecting the type of asphalt binder, the warm mix asphalt mixture with excellent performance is prepared. Warm-mixing process is usually divided into organic warm-mix agent viscosity-reducing type, surfactant type, foam asphalt type three types. In this paper, a series of experiments are designed for the warm mixing process of foamed asphalt and surfactant. The influence of low construction temperature on the rheological mechanical properties of asphalt is discussed theoretically, and the regression equation of experimental data is analyzed to optimize the asphalt selection method. This paper discusses the determination of construction temperature from the mixture work and easiness, the design of asphalt mixture performance test by factoring design method, and the finding out the significant factors that affect the performance of asphalt mixture, so as to improve the performance of asphalt mixture fundamentally. The energy saving and emission reduction analysis of typical processes is carried out, and the practical engineering arrangement is followed up. The energy consumption formula is revised by comparing the actual value with the theoretical value, and the effect of energy saving and emission reduction of warm mixing process is evaluated. The asphalt cementitious materials, including rotational viscosity, dynamic shear rheology, bending beam rheology and so on, are evaluated with reference to AASHTO code. The experimental results of cementitious materials show that the potential rutting resistance of warm mix asphalt is decreased, the crack resistance at low temperature is enhanced, the construction temperature is reduced by 40 鈩
本文编号：2288390
[Abstract]:"warm mixing" is a new technology of environmental protection and energy saving in road engineering construction industry. The study of warm mixing technology can solve the problem of environmental pollution caused by excessive consumption of energy, and has great social benefits. Based on the laboratory experiments, this paper studies the effect of temperature change on the performance of thermally sensitive asphalt, and the variation law of asphalt mixture performance induced by low temperature construction. By changing the gradation of mineral aggregate, improving the design method and selecting the type of asphalt binder, the warm mix asphalt mixture with excellent performance is prepared. Warm-mixing process is usually divided into organic warm-mix agent viscosity-reducing type, surfactant type, foam asphalt type three types. In this paper, a series of experiments are designed for the warm mixing process of foamed asphalt and surfactant. The influence of low construction temperature on the rheological mechanical properties of asphalt is discussed theoretically, and the regression equation of experimental data is analyzed to optimize the asphalt selection method. This paper discusses the determination of construction temperature from the mixture work and easiness, the design of asphalt mixture performance test by factoring design method, and the finding out the significant factors that affect the performance of asphalt mixture, so as to improve the performance of asphalt mixture fundamentally. The energy saving and emission reduction analysis of typical processes is carried out, and the practical engineering arrangement is followed up. The energy consumption formula is revised by comparing the actual value with the theoretical value, and the effect of energy saving and emission reduction of warm mixing process is evaluated. The asphalt cementitious materials, including rotational viscosity, dynamic shear rheology, bending beam rheology and so on, are evaluated with reference to AASHTO code. The experimental results of cementitious materials show that the potential rutting resistance of warm mix asphalt is decreased, the crack resistance at low temperature is enhanced, the construction temperature is reduced by 40 鈩
本文编号：2288390
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