在高速公路工程中,利用道废物泥为水泥稳定基层
Junshuang Deng1,2, Yongsheng Yao2, Chao Huang3
1Jiangxi Transportation Engineering Group Co., Ltd., Nanchang 330038, China.
Materials (Basel, Switzerland)
|September 28, 2024
概括
道废弃物渣显示出作为水泥稳定高速公路基路的可持续聚合物具有前途. 这项研究证实其物理和机械性能适用于建筑应用.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
背景情况:
- 中国高速公路基础设施的扩建产生了大量的道废渣.
- 由于天然聚合物的短缺,高速公路建设需要可持续的替代方案.
研究的目的:
- 评估道废渣的物理和机械性能.
- 探索其在高速公路工程的水泥稳定基路课程中的潜在用途.
主要方法:
- 评估了母岩的单轴压力强度 (道废渣).
- 确定水泥稳定混合物的最佳水分含量和最大干密度.
- 混合物随时间的推移而评估的分裂拉伸强度和不受限制的压力强度.
主要成果:
- 母岩的强度在81-89MPa之间.
- 最佳水分含量为5.4%,最大干密度为2.432g/cm3.
- 28天分裂拉伸强度为0.48-0.73 MPa;不受限制的压力强度从7.0 MPa (7天) 增加到11.0 MPa (90天).
结论:
- 道废渣是一种可行的材料,用于水泥稳定聚合物的基路.
- 结果为高速公路工程设计和施工提供了宝贵的数据.
- 通过利用回收的道废渣来支持可持续的建筑实践.
更多相关视频
相关概念视频
Types of Cement I
105
Portland cement comes in several types, each with distinct properties and applications based on their chemical composition and hydration characteristics:
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...
105
Types of Cement II
98
Portland blast-furnace cement is made by blending Portland cement clinker with granulated blast-furnace slag, which accounts for 25 to 65 percent of the cement's weight. Despite its similarities to ordinary Portland (Type I) cement in terms of fineness and setting times, its early strength is lower, though it achieves comparable strength later on. It's particularly suited for mass concrete structures and marine environments due to its lower heat of hydration and superior sulfate...
98
Design Example: Joints in Concrete Pavements
177
Concrete pavement joints are essential for maintaining the structural integrity and longevity of pavement by controlling where and how the pavement cracks. These joints can be categorized based on their functions, such as contraction or control joints, construction joints, isolation joints, and expansion joints.
Contraction joints are typically formed by sawing a groove into the concrete shortly after it has hardened. This creates a weakened vertical plane, deliberately encouraging cracking at...
Contraction joints are typically formed by sawing a groove into the concrete shortly after it has hardened. This creates a weakened vertical plane, deliberately encouraging cracking at...
177
Design Example: Sustainability in Concrete Building
161
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
161
Design Example: Managing Concrete Workability
74
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
74
Slump Test
176
The slump test is a widely used method to measure the workability of concrete. It employs a 12-inch high truncated cone mold that tapers from eight inches at the base to four inches at the top. Before testing, the mold is securely attached to a flat base and dampened.
Concrete is poured into the mold in three layers to conduct the test. Each layer is compacted 25 times with a steel tamping rod, which has a five-eighths-inch diameter and a rounded end, to ensure even distribution and eliminate...
Concrete is poured into the mold in three layers to conduct the test. Each layer is compacted 25 times with a steel tamping rod, which has a five-eighths-inch diameter and a rounded end, to ensure even distribution and eliminate...
176


