在使用响应表面方法的多个因素下,研究了在多个因素下水泥化岩沙回填充的强度和超声波脉冲速度
Yingxi Li1, Shushuai Wang2, Gang Li1
1College of Mining, Liaoning Technical University, NO. 47, Zhonghua Road, Xihe District, Fuxin, Liaoning Province, 123000, China.
Scientific reports
|November 21, 2025
概括
这项研究调查了水泥比率,颗粒含量和固体度如何影响水泥化岩砂填充强度和超声波脉冲速度. 研究结果揭示了影响煤矿回填性能的关键相互作用.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 采矿工程 采矿工程 采矿工程
背景情况:
- 岩砂 (AS) 越来越多地用于煤矿应用的水泥化AS填充 (CASB).
- 现有的研究缺乏对CASB强度和超声波脉冲速度 (UPV) 测试应用的多因素相互作用的全面分析.
研究的目的:
- 评估普通波特兰水泥 (PO) 与飞灰 (FA) 比率 (PO/FA),细颗粒与AS比率 (细颗粒/AS) 以及固体含量对CASB单轴压力强度 (UCS),分裂拉伸强度 (STS) 和UPV的影响.
- 在CASB中分析UCS,STS和UPV之间的相互关系.
- 阐明这些因素对CASB性能的综合影响.
主要方法:
- 响应表面方法 (RSM) 用于建模和分析三个关键因素 (PO/FA比率,细颗粒/AS比率,固体含量) 对UCS,STS和UPV的影响.
- 研究了单因素效应,双因素相互作用和三因素合效应.
- 建立了影响面和3D散射图来可视化因子相互作用和合.
主要成果:
- 一般来说,UCS,STS和UPV的增长率较高,PO/FA比率,细颗粒/AS比率和固体含量较高.
- 观察到重要的相互作用:PO/FA和细颗粒/AS影响了UPV;细颗粒/AS和固体含量显著影响了UCS和STS.
- 在STS和UCS之间发现了线性关系 (STS ≈0.09-0.105 UCS),在强度和UPV之间发现了二次关系.
结论:
- 该研究成功确定了PO/FA比率,细颗粒/AS比率和固体含量对CASB的UPV,UCS和STS的影响规则.
- 建立了UPV,UCS和STS之间的复杂关系,为优化煤矿中CASB性能提供了关键的见解.
- 这些发现为通过可控混合设计预测和控制CASB的机械性能提供了基础.
关键词:
混凝土岩岩砂填充 (CASB) 是一种响应表面方法 (RSM) 响应表面方法 (RSM)分裂拉伸强度 (STS) 是指超声波脉冲速度 (UPV) 是指超声波脉冲的速度.单轴压力强度 (UCS) 是指单轴的压力强度.更多相关视频
相关概念视频
Strength of Cement
430
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...
430
Fineness of Cement
441
The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
Direct...
Direct...
441
Abrasion Resistance of Concrete
488
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...
488
Soundness of Cement
488
The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
488
Design Example: Aggregate Gradation
287
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...
287
Dynamic Modulus of Elasticity of Concrete
919
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
919


