对使用回收聚合物和沙漠沙子进行水泥稳定基层的调查
Fengchao Liu1, Yongjun Qin1, Yiheng Yang1
1School of Architecture and Engineering, Xinjiang University, Urumqi 830049, China.
Materials (Basel, Switzerland)
|September 14, 2024
概括
沙漠沙 (DS) 和回收粗聚合物 (RCA) 可以取代水泥稳定基中的天然聚合物,满足道路性能标准. 它们在水泥稳定型麦卡丹中的使用减少了碳排放,有助于环境可持续性.
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
- 环境工程 环境工程
背景情况:
- 自然总资源是有限的,这推动了道路建设中可持续替代品的需求.
- 水泥稳定基在路面工程中至关重要,但它们对环境的影响令人担忧.
研究的目的:
- 评估使用沙漠沙 (DS) 和回收粗聚合物 (RCA) 作为在水泥稳定基中的天然聚合物的替代品的可行性.
- 分析DS和RCA对水泥稳定基的机械性能和道路性能的影响.
- 评估结合DS和RCA的水泥稳定麦卡丹的生命周期碳排放.
主要方法:
- 在四个级别中采用了一个正交的实验设计,其中有四个因素 (水泥含量,飞替换率,RCA替换率,DS替换率).
- 测试了机械性能,包括不受限制的压力强度,分裂拉伸强度和压力弹性模块.
- 计算和评估了开发材料的生命周期碳排放量.
主要成果:
- 使用部分RCA和DS的水泥稳定基层证明了令人满意的道路性能.
- 相关性和显微镜分析证实了应用DS和回收聚合物的可行性.
- 与传统材料相比,使用DS和RCA在水泥稳定型麦卡丹中显著减少了生命周期碳排放.
结论:
- 沙漠沙子和回收粗聚合物是道路工程中水泥稳定基的可行材料.
- 结合DS和RCA提供了一个可持续的解决方案,减少环境影响和碳足迹.
- 这项研究为促进这些替代材料在道路建设中的使用提供了理论基础.
更多相关视频
05:38Production and Analysis of Sporosarcina pasteurii Biocement Bricks Using Custom 3D-Printed Molds for Unconfined Compression Tests
Published on: March 7, 2025
218
11:14Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
Published on: February 21, 2017
12.4K
相关概念视频
01:25Deleterious Substances in Aggregate
155
Deleterious substances in aggregates can be detrimental to the quality and durability of concrete. These substances include organic impurities like loam, which interfere with cement hydration and are usually present in the sand. These prevent a good bond between aggregate and cement paste. Organic impurities can be detected using the colorimetric test, where the darkness of a solution after agitation indicates the level of organic content.
Another type of impurity is clay and fine material that...
Another type of impurity is clay and fine material that...
155
01:24Design Example: Aggregate Gradation
91
The right type and quality of aggregates are crucial for concrete as they significantly influence its properties, mix proportions, and cost-effectiveness. If different sources are available for sand, the commonly used fine aggregate in concrete, the selection of sand is primarily based on its gradation.
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is...
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is...
91
01:20Strength of Cement
127
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
127
01:21Aggregate Cement Ratio
225
The Aggregate Cement ratio refers to the weight of aggregate divided by the weight of cement in a concrete mix. Altering this ratio has profound effects on the concrete's properties. This ratio plays a pivotal role in determining the strength, workability, and durability of concrete. When the Aggregate Cement ratio is higher, the mix is leaner, meaning it has less cement paste to lubricate the aggregate, potentially making the concrete less workable. Such mixes, known as lean, enhance the...
225
01:16Segregation in Fresh Concrete
104
Segregation in fresh concrete is a phenomenon where the components of the concrete mix separate, leading to uneven distribution and compromised structural integrity. This separation typically occurs when concrete is subjected to excessive horizontal movement within forms, or when it is dropped from considerable heights or forced through narrow, winding paths. As a result, heavier coarse aggregate particles settle at the bottom, while lighter, finer materials such as cement and water rise to the...
104
01:29Preplaced Aggregate Concrete
95
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
95