活性地质聚合物水泥砂的机械性能用于非振动压缩沟回填补
Hao Zhang1, Hao Li2, Haolong Guo1
1School of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, 306 Zhaowuda Road, Hohhot, 010018, Inner Mongolia, China.
Scientific reports
|April 10, 2025
概括
使用飞灰和金属的地质聚合物砂为管道沟回填充提供了一个可持续的替代方案. 最佳配方显示出出色的机械性能和流动性,满足非振动应用的行业标准.
科学领域:
- 材料科学 材料科学 材料科学
- 地质聚合物化学 地质聚合物化学
- 可持续的建筑材料 可持续的建筑材料
背景情况:
- 传统水泥生产造成的环境污染需要替代的粘合剂.
- 飞灰和金属是潜在的补充性水泥材料.
- 地质聚合为波特兰水泥提供了一个低碳足迹的替代方案.
研究的目的:
- 研究飞灰和金属作为水泥材料的替代品.
- 为了确定非振动管道沟回填充的最佳地质聚合物砂组成.
- 分析开发的地质聚合物砂的孔隙结构和水合物阶段.
主要方法:
- 地质聚合物砂制备的直角实验设计.
- 飞灰,甲甲和活性剂 (NaOH-Na2SiO3) 的比例各不相同.
- 流动性,机械性能 (压力和屈曲强度) 和显微镜测试 (孔隙结构,水合物相位分析).
主要成果:
- 最佳的地质聚合物砂 (30%的飞灰,10%的甲,4%的活性剂) 实现了17.2 MPa的压力强度,5.55 MPa的屈曲强度和157 mm的流动性.
- 与飞灰相比,甲可林对机械性能产生了更显著的积极影响.
- 显微镜分析证实了C-(A) -S-H和N-A-S-H凝和地岩晶体的形成,增强了砂密度和孔隙结构.
结论:
- 活性地质聚合物砂与飞灰和金属是可行的,可持续的替代水泥材料的替代品.
- 优化的地质聚合物砂满足非振动管道沟填充应用的性能要求.
- 该研究为基础设施项目的地质聚合物砂开发提供了宝贵的见解,减少了对环境的影响.
更多相关视频
相关概念视频
01:17Mortar Properties
97
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
97
01:20Strength of Cement
115
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...
115
01:26Alkali Aggregate Reaction in Concrete
75
The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
75
01:29Mortar
186
Mortar, a mixture of Portland cement, hydrated lime, sand, and water, is a crucial binding material in construction. Its primary function is to join masonry units together, filling gaps and ensuring a uniform distribution of weight across the structure. This helps in preventing potential weaknesses. Mortar also serves as a protective barrier against environmental elements such as water and wind, thereby safeguarding the interior of the structure. It also compensates for surface irregularities...
186
01:21Types of Cement I
89
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...
89
01:14Testing Water Quality
94
When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
94