关于基石纤维改性青压力吸收层抗反射裂纹性能的实验研究
Cheng Shen1, Zhengguang Wu1,2, Peng Xiao1,2
1College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China.
Materials (Basel, Switzerland)
|May 11, 2024
概括
将玄武岩纤维添加到青压力吸收层中,可以显著提高路面的反射裂纹性能. 最佳的组合可以将裂纹耐受性提高300%以上,为路面设计提供了宝贵的见解.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 铺路工程 铺路工程是指铺路工程.
背景情况:
- 反射裂是半刚性底座路面的常见问题,降低了耐用性.
- 现有的压力吸收层提供了一些保护,但需要增强层间粘合和抗破裂能力.
- 玄武岩纤维和青显示有望提高压力吸收层的性能.
研究的目的:
- 为了研究将玄武岩纤维纳入青压力吸收层的有效性.
- 评估不同基岩纤维长度和剂量对路面性能的影响.
- 为了确定最佳的纤维参数,以提高层间粘合和反射裂纹性能.
主要方法:
- 复合路面样品使用水泥稳定麦卡丹基,玄武纤维青压力吸收层和AC-20青混合物表面层进行准备.
- 使用层间直接剪切,层间拉力,三点曲和覆盖试验 (OTs) 来评估性能.
- 测试了不同长度 (3-12厘米) 和比例 (120-180克/米2) 的玄武岩纤维.
主要成果:
- 在基岩纤维中,层间粘合性能的改善并不显著.
- 与没有纤维的标本相比,反反射裂纹性能显示出高达305.5%的大幅增加.
- 纤维含量被确定为影响层间粘合和抗裂性能的主要因素.
结论:
- 玄武纤维-青压力吸收层通过形成吸收和分散负载的网络结构来显著提高路面反射裂纹性能.
- 在提高性能方面,纤维含量比纤维长度更为关键.
- 玄武纤维青压力吸收层的最佳参数是9厘米的纤维长度和160g/m2的纤维含量.
相关概念视频
Abrasion Resistance of Concrete
128
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
One such test is the revolving disc test, where three plates...
128
Microcracking in Concrete
117
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
117
Fiber Reinforced Concrete
75
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
75
Behavior of Concrete Under Compressive Load
158
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
As the concrete specimen fractures under...
158
Toughness and Hardness of Aggregate
254
Toughness and hardness are critical properties of aggregate materials used in concrete, particularly on pavement surfaces and industrial flooring subjected to heavy loads. Toughness is defined as the aggregate's resistance to failure by impact and is measured by the aggregate impact value (AIV). For this, the aggregate impact value test is performed, wherein the impact is delivered by a standard hammer, which falls freely under its own weight onto the aggregates. The aggregates fragment in...
254
Fatigue Strength of Concrete
187
Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
187


