Optimization of Ball-Milling Parameters for Enhanced Compressive Strength of Coal Gangue Cement Paste: A Response Surface Methodology Approach
Journal Title: Journal of Civil and Hydraulic Engineering - Year 2024, Vol 2, Issue 3
Abstract
The substitution of cement with coal gangue powder (CGP) offers significant potential for energy conservation, emission reduction, and environmental sustainability. To optimize the mechanical properties of coal gangue cement paste, a modified response surface methodology (RSM) model was developed, incorporating grinding parameters as independent variables and compressive strength as the response variable. The feasibility of the model was validated through coefficient estimation, variance analysis, and fitting statistics. The analysis revealed that milling speed was the most significant factor influencing the compressive strength at 20% substitution, while the ball-to-material ratio predominantly affected the strength at 50% substitution. An increase in milling speed was observed to significantly broaden the particle size distribution, with larger particles (15.14 um to 275.42 um ) serving primarily as micro-aggregates, and smaller particles (0.32 um to 15.14 um) functioning as fillers within ultra-fine pores. Scanning Electron Microscopy (SEM) further corroborated these findings. Numerical optimization based on the RSM model identified optimal grinding parameters: a ball-to-material ratio of 1.40, a milling time of 0.843 hours, and a milling speed of 300 rpm. These parameters are recommended to achieve the target compressive strengths of 25 MPa at 20% CGP substitution and 10 MPa at 50% CGP substitution. This study provides a cost-effective and feasible approach for the utilization of coal gangue in cementitious materials, contributing to the advancement of sustainable construction practices.
Authors and Affiliations
Surnam Lubona Mapulanga, Guijuan Hu, Liyun Cui
Keywords
Related Articles
- EP ID EP746407
- DOI https://doi.org/10.56578/jche020303
- Views 66
- Downloads 0
A Smoothed Particle Hydrodynamics Approach for One-Dimensional Dam Break Flow Simulation with Boussinesq Equations
The Smoothed Particle Hydrodynamics (SPH) method has been applied to solve the Boussinesq equations in order to simulate hypothetical one-dimensional dam break flows (DBFs) across varying depth ratios. Initial simulation...
Long-Term Aging of Recycled Asphalt Pavements: The Influence of Meteorological Conditions on Bitumen Properties Over 16 Years
The reuse of Reclaimed Asphalt Pavement (RAP) in road construction has become increasingly prevalent due to its potential environmental and economic benefits. The aging characteristics of RAP, particularly the degradatio...
Investigating the Properties and Determinants of Underwater Anti-Dispersive Cementitious Soil with Kaolin: An Experimental Approach
Pile foundations, as one of the main foundation forms for bridges and offshore wind power structures, are prone to scour pits around them under the long-term action of water flow, leading to a decrease in bearing capacit...
Optimization of Rainwater-Harvesting Dam Placement in Iraq’s Western Desert: A GIS and Mathematical Modeling Approach
This study introduces a novel methodology for optimizing the design of small dams in the Western Desert of Iraq, a region characterized by its vast expanse and significant flood water influx, particularly in the Horan Va...
Real-Time Monitoring and Platform Design for Concrete Compactness Using Long Short-Term Memory Networks
To address the complexities and inaccuracies associated with traditional methods of concrete compactness monitoring, in this paper, a real-time monitoring approach based on long short-term memory (LSTM) networks has been...