使用工业固体废物与建筑废物结合制备矿山填充材料的性能研究
Yang Cai1,2, Qiumei Liu2, Fufei Wu1
1School of Materlals and Architectural Engineering, Guizhou Normal University, Guiyang 550025, China.
Materials (Basel, Switzerland)
|August 14, 2025
概括
这项研究探讨了使用建筑和工业固体废物来制造矿山填埋材料. 结合渣 (PS) 和飞灰-渣-合石膏 (FA-PS-PG) 复合材料,提高了材料的强度和柔性.
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.
- 环境科学 环境科学
背景情况:
- 建筑和工业固体废物的资源利用对于可持续的城市化至关重要.
- 矿山填充需要有效的材料来管理废物和支持采矿业务.
研究的目的:
- 研究采用建筑垃圾与各种工业固体废物相结合的矿山回填物材料的制备和性能.
- 评估不同工业固体废物和替代率对回填物材料性能的影响.
主要方法:
- 使用建筑垃圾和工业固体废物 (GGBFS, FA, SF, PS, FA-PS-PG, FA-PS-βPG) 制备19种矿山回填物材料的混合比例,其替代率为50%,55%和60%.
- 评估沉,干密度,压力强度,单轴应力-应变关系,微观形态学和相组合.
- 构成模型参数 (a和b) 的分析,用于柔性评估.
主要成果:
- 与纯水泥相比,工业固体废物改善了填充材料的流动性.
- 加入工业固体废物增加了柔性,通过增加参数"a"和减少参数"b"在56天后表示.
- 渣 (PS) 在所有替代率中始终产生更高的压力强度. 在50%的替代率下,FA-PS-PG混合物在56天内达到最高的压力强度 (8.02 MPa).
结论:
- 建筑垃圾和工业固体废物可以有效地用于矿山填埋材料.
- 这些废料的使用为矿山回填项目提供了显著的经济,环境和资源效益.
- 特定的组合,如FA-PS-PG在50%的替代性,显示出高强度矿山填充应用的有希望的结果.
相关概念视频
01:20Slump Test
423
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...
423
01:14Design Example: Managing Concrete Workability
121
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.
121
01:29Preplaced Aggregate Concrete
137
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...
137
01:22Compacting Factor test
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The compacting factor test is a method used to assess the workability of concrete. It is especially suitable for concrete mixes containing aggregates up to one and a half inches in size. This test involves specialized equipment consisting of two truncated cone-shaped hoppers and a cylinder, all with polished interior surfaces to minimize friction.
The procedure begins by placing concrete into the upper hopper without any compaction. Once filled, the bottom door of this hopper is opened,...
The procedure begins by placing concrete into the upper hopper without any compaction. Once filled, the bottom door of this hopper is opened,...
248
01:24Factors Affecting Workability
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The workability of concrete is a critical characteristic that influences the ease of mixing, handling, and finishing the concrete. It is affected by several factors including water content, aggregate properties, and admixtures like air entrainment. Water plays a fundamental role as it lubricates the concrete mix, facilitating easier movement and placement. However, the water requirement varies depending on the texture and shape of aggregates. Finer particles and angular, rough-textured...
109
01:29Aggregates Classification
381
Aggregate classification is generally based on its size, petrographic characteristics, weight, and source. Size classification ranges from coarse to fine aggregates, defined by the size of the particles. Coarse aggregates are particles that do not pass through ASTM sieve No. 4, and aggregates that pass through the sieve are fine aggregates.
Petrographic classification groups aggregates based on common mineralogical characteristics. Some of the common mineral groups found in aggregates are...
Petrographic classification groups aggregates based on common mineralogical characteristics. Some of the common mineral groups found in aggregates are...
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