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2025 Vol. 0, No. 8
Published: 2025-08-10
1
Development and performance evaluation of low-density cement slurry systems for low-temperature cementing
LONG Dan, et al
With the development of oil and gas exploration to deepwater offshore oil and gas, coalbed methane, etc., the cementing environment with low temperature and low fracture pressure has gradually increased. In order to solve the problem of cementing under low temperature conditions, this paper constructs a low-density cement slurry system with excellent engineering performance and fast rapid early strength development under low temperature environment based on the research of cement-based materials, hydration reinforcement materials, lightening materials and admixtures. The performance test of the system shows that the API water loss of cement slurry is less than 48 mL, the density difference between the upper and lower parts is less than 0.05 g/cm3, and the 24 h compressive strength is greater than 3.6 MPa and 48 h compressive strength is greater than 8.1 MPa under the low temperature condition of 4 ℃, which has excellent early strength and can meet the engineering requirements of cementing in low temperature environment. This study is of great significance to ensure the safe and efficient exploitation of deepwater offshore oil and gas resources and coalbed methane resources
2025 Vol. 0 (8): 1- [
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6
Research on carbonation resistance of phosphogypsum supersulfate cement
LIU Lijuan, et al
This experiment tested and analyzed the strength and hydration products of super sulfate cement after carbonization, and compared it with ordinary Portland cement. At the same time, measures to improve the carbonation resistance of super sulfate cement were discussed. The research results indicated that the carbonation resistance of super sulfate cement was inferior to that of P·O 42.5 cement. No diffraction peak of ettringite was observed in the super sulfate cement after carbonation for 3 days, indicating that ettringite changed during the carbonization process. The addition of a certain amount of sodium metasilicate is beneficial for improving the carbonation resistance performance. The addition of ultrafine mineral powder makes the super sulfate cement slurry denser, optimizes the pore structure of the cement slurry, and thus improves its carbonation resistance.
2025 Vol. 0 (8): 6- [
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10
Experimental study on a high-performance modified fly ash and discussion on industrial production technology
2025 Vol. 0 (8): 10- [
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41
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15
Experimental study on co-production of calcium carbonate and ammonium sulfate from mineralized phosphogypsum in cement kiln raw flue gas
Hot!
YAN Jiacheng, et al
2025 Vol. 0 (8): 15- [
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49
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19
Application practice of rubber ash as an alternative fuel in clinker production
Hot!
ZHANG Quanlei, et al
2025 Vol. 0 (8): 19- [
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49
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21
Analysis of application of metal filter bags in flue gas of cement kilns
LI Wenyong, et al.
2025 Vol. 0 (8): 21- [
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41
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24
Analysis and solutions of common technical problems in thermal diagnosis of sintering system
Hot!
XIONG Yagang, et al
2025 Vol. 0 (8): 24- [
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46
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29
Research on multi-condition predictive control of calciner in cement production process
CHU Biao
The precalciner is a core process equipment in cement production. Due to the decline in the quality of raw materials and fuel caused by resource constraints, the operating conditions of the precalciner have become increasingly complex and variable, leading to frequent fluctuations in temperature, which adversely affects the quality of clinker. This paper analyzes the factors influencing the temperature of the precalciner during the production process, establishes a model for categorizing the operating conditions of the precalciner, and proposes a generalized predictive control approach for multi-condition operation of the precalciner. The effectiveness of this approach is verified through simulation experiments. The simulation results indicate that under different operating conditions, the introduction of a lagswitching control strategy allows the precalciner to quickly and stably follow its set point while reducing temperature fluctuations
2025 Vol. 0 (8): 29- [
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39
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33
Practice of comprehensive utilization of resources in integrated cement, aggregate and commercial concrete enterprises
HU Zhenqing, et al
2025 Vol. 0 (8): 33- [
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32
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35
Practice of replacing aluminum-based raw materials with gasification ash in production of cement clinke
RAO Rui, et al.
2025 Vol. 0 (8): 35- [
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37
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38
Technical transformation measures and effects of V-type powder separator
JIN Jiasheng
2025 Vol. 0 (8): 38- [
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43
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40
Practice and exploration of intelligent transformation driving efficiency improvement of mines
LIU Tao, et al
2025 Vol. 0 (8): 40- [
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32
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43
Construction and application of calciner digital twins based on feature extraction and reduced order model
SHUI Pei
This paper proposes a digital twin technology based on numerical simulation and feature extraction, validated using a cement decomposition furnace as an example. To address the challenges of sensor monitoring in harsh industrial environments, the study combines CFD(Computational Fluid Dynamics)simulation and reduced-order modeling techniques, introducing a digital twin construction method based on POD(Proper Orthogonal Decomposition)feature extraction and Artificial Neural Network(ANN)surrogate modeling. Physical field data under various operating conditions are obtained through parameter design and high-precision simulation. The POD method is used for dimensionality reduction of high-dimensional data, and ANN is employed to map parameter groups to POD modal coefficients, achieving efficient and accurate flow field predictions with errors below 4%. Additionally, Gaussian spatial interpolation is applied to downscale mesh resolution, enabling model lightweighting and facilitating rapid deployment of the digital twin. The results demonstrate that this method is highly applicable and scalable, making it suitable for monitoring, fault diagnosis, and lifespan prediction of complex industrial equipment, providing technical support for refined equipment management and IoT applications.
2025 Vol. 0 (8): 43- [
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48
Thermal process prediction and analysis in cement production process based on machine learning
CHEN Guang, et al
2025 Vol. 0 (8): 48- [
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39
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51
Research on application of artificial intelligence technology in cement manufacturing
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YANG Xiaohui, et al
2025 Vol. 0 (8): 51- [
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50
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53
Determination of manganese oxide in cement and raw materials by potassium permanganate titration
WANG Wei, et al.
2025 Vol. 0 (8): 53- [
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30
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55
Research on physical properties of eutectic phosphorus structure in phosphogypsum and its influence on performance of gypsu
CHEN Shumin, et al.
Eutectic phosphorus (CaHPO4·2H2O) in industrial by-product phosphogypsum is a key impurity affecting the performance of phosphogypsum building gypsum. This paper takes Xinyangfeng water-washed phosphogypsum as the research object. Through Fourier transform infrared spectroscopy, X-ray diffraction and chemical analysis methods, it systematically explores the physical property characteristics of eutectic phosphorus, the determination method of its content and the mechanism of its effect on the performance of gypsum, revealing the existence form and structural characteristics of eutectic phosphorus. The test results show that eutectic phosphorus exists in the gypsum lattice in the form of a solid solution, and its content can be characterized by the difference between total phosphorus and soluble phosphorus. Meanwhile, the presence of eutectic phosphorus significantly affects the hydration process, strength development and durability of phosphorus building gypsum. This research provides a theoretical basis and technical reference for the resource utilization of phosphogypsum
2025 Vol. 0 (8): 55- [
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38
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59
Application and composition detection of steel slag in concrete
ZHANG Zhijuan, et al.
2025 Vol. 0 (8): 59- [
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37
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62
Optimal design of polymer fiber concrete for pile foundation engineering based on complex geological conditions in mountainous areas
CHEN Long
2025 Vol. 0 (8): 62- [
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31
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67
Analysis of causes of "slow release" phenomenon in ready-mixed concrete
LI Bin
2025 Vol. 0 (8): 67- [
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40
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71
Research on a method for identifying and evaluating machine-made sand, river sand and sea sand#br# #br#
XU Min, et al
2025 Vol. 0 (8): 71- [
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38
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76
Research on crack control technology for large volume concrete construction
BAI Tixin
2025 Vol. 0 (8): 76- [
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38
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81
Performance analysis of large-size cement-stabilized macadam base course with filling structure
YANG Lanlan, et al
2025 Vol. 0 (8): 81- [
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33
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84
Experimental research and application of wet shotcrete technology for concrete spraying
PAN Fengzhen
2025 Vol. 0 (8): 84- [
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33
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87
Research on causes and optimization prevention strategies of concrete cracks in side walls of open-cut and covered tunnels#br# #br#
WANG Peng
2025 Vol. 0 (8): 87- [
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31
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90
Construction application of prefabricated concrete in nuclear power plants
LIU Yang, et al
2025 Vol. 0 (8): 90- [
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29
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93
Key technologies of high-strength concrete in construction of super-tall buildings
ZHENG Jie
2025 Vol. 0 (8): 93- [
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35
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96
Construction technology and optimization design of carbon fiber reinforcement for reinforced concrete frame structures
SONG Zhenming, et al
2025 Vol. 0 (8): 96- [
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40
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99
Research on precise design of concrete mix ratio and performance enhancement technology for cross-river bridge
LI Hongwei, et al
2025 Vol. 0 (8): 99- [
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27
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102
Research on synergistic utilization technology of industrial solid waste in municipal road cement concrete
WU Wenrui
2025 Vol. 0 (8): 102- [
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33
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105
Optimization of mix proportions for ready-mixed concrete in high-rise residential construction
SUN Qi
2025 Vol. 0 (8): 105- [
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27
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108
Application technology of prefabricated concrete external components in construction environments with constraints
LU Kangkang
2025 Vol. 0 (8): 108- [
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32
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111
Research on integrated optimization of electrical and mechanical systems of large-scale cement concrete mixing stations and their adaptability to construction sites
ZHENG Zhao
2025 Vol. 0 (8): 111- [
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30
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114
Bonding performance of polyurethane cement-based materials and its application in structural reinforcement
CHEN Jing, et al.
2025 Vol. 0 (8): 114- [
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30
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116
Research on strength control of foundation concrete for hydropower station pressure pipelines
DONG Zhanying
2025 Vol. 0 (8): 116- [
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29
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119
Research on application of carbon fiber reinforced concrete in construction of seismic-resistant building structures
MA Jun
2025 Vol. 0 (8): 119- [
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31
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122
Study on effect of incorporating organic fibers under high temperature conditions on crack resistance of UHPC (ultra-high performance concrete)
XU Chuan
2025 Vol. 0 (8): 122- [
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36
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125
Construction technology of synchronous grouting for concrete segmental blocks of rainwater tunnel in composite stratigraphic park
LI Changyin
2025 Vol. 0 (8): 125- [
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32
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128
Technology analysis of construction quality of impact drill-driven cast-in-place piles based on concrete
LI Zhi
2025 Vol. 0 (8): 128- [
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27
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131
Analysis of causes and impact evaluation of cracks in cast-in-place concrete floor panels
LI Yonghao
2025 Vol. 0 (8): 131- [
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31
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133
Impact of aggregate moisture content on construction cost of asphalt concrete pavement
LIU Wen
2025 Vol. 0 (8): 133- [
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48
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136
Analysis of construction quality issues of prestressed concrete structures in bridge and road engineering
XIE Guangqing
2025 Vol. 0 (8): 136- [
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37
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139
Research on one-time top-loading and pressure-injection construction technology of steel reinforced concrete pipes for cross-sea bridges
LIU Jianyong
2025 Vol. 0 (8): 139- [
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35
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142
Research on impact and monitoring of concrete foundation pit excavation on surrounding environment and buildings
WANG Haojie, et al
2025 Vol. 0 (8): 142- [
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37
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145
Management and safety supervision of high-strength cement mix ratio schemes
WANG Lei
2025 Vol. 0 (8): 145- [
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34
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148
Research on application of non-destructive testing technology in detection of micro-cracks in reinforced concrete beams
2025 Vol. 0 (8): 148- [
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27
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151
Research on application of non-destructive testing technology in detection of micro-cracks in reinforced concrete beams
LIAO Hongjian
2025 Vol. 0 (8): 151- [
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29
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154
Application technology and material optimization research of permeable concrete in sponge city construction
LAN Haojue
2025 Vol. 0 (8): 154- [
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44
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157
Influence of replacing fly ash with limestone powder on properties of concrete
NIU Maowei
2025 Vol. 0 (8): 157- [
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34
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