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2026 Vol. 0, No. 2
Published: 2026-02-10
1
Thermodynamic analysis of hydrogen and ammonia combustion replacing coal in cement industry
Hot!
GUO Lun
Against the backdrop of "dual carbon", replacing traditional fossil fuels with green energy has become a key measure for carbon emission reduction at the source in the cement industry. Therefore, this study takes a 2 500 t/d cement clinker production line as the research object, analyzes the effects of different substitution ratios of hydrogen and ammonia on the flue gas flow, composition and temperature at the outlet of the decomposition furnace through thermodynamic analysis, and conducts an economic analysis. The results show that the blending of hydrogen in the decomposition furnace reduces the mass flow of the outlet flue gas, slightly increases the volume flow, raises the outlet temperature, increases the volume fractions of O2 and H2O, and reduces the volume fraction of CO2. The blending of ammonia in the decomposition furnace increases the mass flow of the outlet flue gas, decreases the outlet temperature, increases the volume flow more than that of hydrogen blending, increases the volume fractions of O2 and H2O, and reduces the volume fraction of CO2. The economic analysis shows that when the costs of green hydrogen and ammonia decrease to 5 320 CNY/t and 792 CNY/t respectively, or when the carbon tax prices rise to 2 773 CNY/t and 2 858 CNY/t respectively, the costs of using green hydrogen/ammonia in the cement industry will be comparable to those of coal. This study can provide important references for future energy conservation, emission reduction and energy structure optimization in the cement industry.
2026 Vol. 0 (2): 1- [
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158
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6
Resource utilization of calcium fluoride sludge from photovoltaic industry in cement production
Hot!
PAN Jiali, et al
2026 Vol. 0 (2): 6- [
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156
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9
In-situ self-denitrification technology path for cement plant decomposition furnace based on theory of coal nitrogen thermal migration
Hot!
YANG Kang, et al
2026 Vol. 0 (2): 9- [
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119
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13
Research on preparation of silicate cement clinker using calcium silicate residue from phosphogypsum acid production#br#
LIU Chen, et al.
This study investigates the impact of replacing limestone with calcareous slag derived from acid production using phosphogypsum on the formation process of Portland cement clinker. By varying calcareous slag incorporation ratios and calcination temperatures, the mineral composition and burnability of clinker were analyzed through measurements of free lime (f-CaO) content, XRD, and petrographic analysis. The results demonstrate that calcareous slag from phosphogypsum can replace limestone at incorporation ratios ≤28% for Portland clinker production. Fluorine and sulfur present in the calcareous slag catalyze solid-state reactions of clinker minerals. Elevated calcination temperatures significantly reduce f-CaO content, and Portland cement clinker shows good compatibility with calcareous slag incorporation.
2026 Vol. 0 (2): 13- [
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164
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17
Experimental study on high-temperature resistant chromium-reducing agent for cement based on ferrous sulfate
LIU Chen, et al
The main component of most chromium-reducing agents in the current market is ferrous sulfate. However, since the temperature of the cement after grinding is high and ferrous sulfate is not resistant to high temperatures, most of the chromium-reducing agents produced by manufacturers tend to be oxidized after being added to the cement, thereby losing their chromium-reducing effect. This project uses ferrous sulfate as the main raw material and mixes in auxiliary reducing agents and antioxidants. It alters the charge distribution and reactivity on the surface of the reducing agent particles, forming a protective layer on the surface of ferrous sulfate and other reducing agents to prevent ferrous sulfate from oxidizing to ferric sulfate at high temperatures. Through this process, a low-cost, high-temperature-resistant, and long-lasting chromium-reducing agent is successfully prepared. This enables excellent and stable chromium removal effects in cement production and application.
2026 Vol. 0 (2): 17- [
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126
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21
Research on low-temperature thermal activation performance of phosphorus slag powder cement-based cementitious materials
LI Jie, et al
In order to address the issue of the impact of Phosphorus slag incorporation on the strength of cement, this article prepared cement-based cementitious materials with different amounts of phosphorus slag powder, and compared the hydration and mechanical properties of phosphorus slag cement composite cementitious materials at different curing temperatures. The influences of phosphorus slag powder on the workability, hydration products and characteristics, and mechanical properties of cement at different curing temperatures were evaluated through standard consistency, X-ray diffraction(XRD)analysis, hydration temperature rise analysis and compressive strength of the mortar. The results showed that as the curing temperature increased, the retarding effect brought by the addition of phosphorus slag powder was weakened, and the relative activity index of phosphorus slag cement composite cementitious materials at 7 days and 28 days increased significantly. When the curing temperature increased from 20 ℃ to 40 ℃, the relative activity index of phosphorus slag admixture increased from 88% to 115% at 28 days. Moreover, with the increase of phosphorus slag content, the effect of curing temperature on its performance became more significant.
2026 Vol. 0 (2): 21- [
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134
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25
Research on application of gasification slag as alternative fuel in cement kiln systems
Hot!
LAN Wenxian, et al.
2026 Vol. 0 (2): 25- [
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126
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28
Resolution of a preheater system blockage issue
JIA Bo, et al.
2026 Vol. 0 (2): 28- [
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117
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31
Analysis of causes of cement clearing accident based on Apriori algorithm
LI Wendi, et al.
2026 Vol. 0 (2): 31- [
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84
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35
Analysis of impact of air humidity on cement quality
ZHANG Dapeng, et al
2026 Vol. 0 (2): 35- [
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124
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37
Analysis of abnormal fluctuations in coal consumption and optimization for energy saving on a 5 000 t/d production line
WANG Kai, et al
2026 Vol. 0 (2): 37- [
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135
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40
Research on impact of preheater system optimization on thermal efficiency of kiln system
SHI Zhiwei, et al
2026 Vol. 0 (2): 40- [
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106
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42
Application test of centrifugal coal in a 4 800 t/d cement production line
LV Zhengxiong, et al.
2026 Vol. 0 (2): 42- [
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152
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45
Study on particle size characteristics of cement products produced by vibrating mill#br#
LI Mingzhe, et al
2026 Vol. 0 (2): 45- [
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116
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49
Design and application of an automated static weighing system for batch materials sampling inspection
WU Haibin
2026 Vol. 0 (2): 49- [
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104
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51
A treatment scheme for excessive slag discharge of coal vertical mill
E Gang
2026 Vol. 0 (2): 51- [
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144
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53
Research on online monitoring technology of mill load based on multi-source sensing fusion - taking application of KIMA SmartFill system in cement industry as an example
LIN Xi
2026 Vol. 0 (2): 53- [
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132
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56
Carbon emission management platform for cement industry based on industrial internet
WU Xianbin, et al.
2026 Vol. 0 (2): 56- [
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138
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60
Influence of different specific surface areas of stone powder on performance of special mortar for aerated blocks
WANG Yiheng, et al
The effects of single-doped and compound-doped stone powder with different specific surface areas on the properties of special mortar for aerated blocks were studied in the paper. The results show that under the condition of single admixture, with the increase of specific surface area of stone powder, the consistency and bonding strength of the special mortar gradually decrease, and the 28 d compressive strength first increases and then decreases. Under the condition of mixing two kinds of stone powder with different specific surface area, the bonding strength of special mortar prepared by A-type stone powder and B-type stone powder is the highest, the 28 d compressive strength of special mortar prepared by A-type stone powder and C-type stone powder is the largest. Under the condition of three kinds of stone powder with different specific surface area, when the ratio of A-type, B-type and C-type stone powder is 8:1:1, the comprehensive performance of the special mortar is the best. Among them, the 14 d bond strength is 0.43 MPa, and the 28 d compressive strength is 6.0 MPa
2026 Vol. 0 (2): 60- [
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145
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64
Study on effect of water retention agents on concrete properties
GAO Tao, et al
In response to the apparent defects and performance deterioration of concrete caused by early water migration and evaporation behavior, this paper systematically investigates the optimization effect and influence law of xanthan gum-based water-retaining agents on the performance of C40 concrete under sealed, exposed, and 6 m/s wind-speed curing conditions. The results show that with the increase of the dosage of the water-retaining agent, the slump of the concrete first increases and then decreases, the pressure bleeding rate gradually decreases, the emptying time of the inverted slump cone gradually prolongs, the compressive strength first increases and then decreases, the shrinkage rate gradually decreases, and the apparent quality first improves and then deteriorates. Specifically, when the dosage of the water-retaining agent is 0.02%, the adverse effects on the concrete slump and the emptying time of the inverted slump cone are relatively small, which can significantly reduce the pressure bleeding rate of the concrete. When the dosage of the water-retaining agent is 0.03%, it can obviously eliminate the differences in the effects of different curing conditions (such as sealed, exposed, and 6 m/s wind-speed) on the mechanical properties of the concrete, and enhance the 7 d and 28 d compressive strength of the concrete. Moreover, under this dosage condition, the water-retaining agent can minimize the pore area ratio and the number of cracks on the concrete surface, eliminate surface color differences, and improve the apparent quality of the concrete
2026 Vol. 0 (2): 64- [
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137
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68
Study on effect of polyether modified silicone defoamer on concrete properties
CAO Wenfeng, et al.
In the process of mixing and molding cement concrete, bubbles are generated internally, which leads to a decrease in its compactness, compressive strength, impermeability, and erosion resistance. The effects of various proportions and types of polyether-modified silicone defoamers were investigated through experiments. It was observed that the defoamers can extend the initial and final setting time of cement concrete. Different types and dosages of defoamers exert a positive influence on the 28 d compressive strength, impermeability and erosion resistance of cement concrete. Specifically, the 28d compressive strength reaches the peak when the dosage is 0.10%. Both impermeability and erosion resistance reach their optimal levels at a dosage of 0.15%. Among the three types of defoamers, the medium-to-high polyether type demonstrates superior overall performance
2026 Vol. 0 (2): 68- [
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181
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72
Research on key technologies of base sliders for top-driving construction of frame bridges based on C50 dual-speed concrete
YU Xiaojing, et al.
2026 Vol. 0 (2): 72- [
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96
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75
Temperature and humidity evolution law of multiphase concrete under microwave curing
HE Wenrui, et al.
2026 Vol. 0 (2): 75- [
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136
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78
Research on penetrability detection technology of concrete structural bodies in building construction projects
NIU Haitao
2026 Vol. 0 (2): 78- [
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148
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81
Research on fatigue resistance performance of fiber-reinforced cement concrete pavement
WEI Jifen
2026 Vol. 0 (2): 81- [
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124
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84
Application of concrete structure surface cracks detection in construction engineering
GUO Lun
2026 Vol. 0 (2): 84- [
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158
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87
Analysis of cement concrete construction technology for soft soil roadbeds in bridge and road engineering
WANG Shenglin
2026 Vol. 0 (2): 87- [
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124
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90
Construction technology of high-performance concrete pumping technology in high-rise buildings
LIU Cui
2026 Vol. 0 (2): 90- [
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137
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93
Research on bending properties and main influencing factors of high ductility cement-based composite material ECC
YANG Shuai, et al
2026 Vol. 0 (2): 93- [
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121
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96
Experimental study on effects of different gypsum types on properties of general Portland cement
KANG Jie, et al.
2026 Vol. 0 (2): 96- [
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122
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99
Research on durability of high-performance concrete in construction of long-span bridges
HOU Hai
2026 Vol. 0 (2): 99- [
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138
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102
Refined control and quality improvement methods of construction technology of plain concrete in building engineering
YUAN Weina
2026 Vol. 0 (2): 102- [
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115
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105
Research on enhancement of concrete strength and durability based on optimization of cement clinker
ZHANG Shanjun
2026 Vol. 0 (2): 105- [
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124
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108
Influence of slag admixture on crack resistance of cement concrete for dams
LONG Guobin
2026 Vol. 0 (2): 108- [
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138
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111
Research on key technologies for early curing of concrete in bridges in Xizang mountainous areas
SUN Wei
2026 Vol. 0 (2): 111- [
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127
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114
Analysis of application of high-strength self-compacting micro-expanding steel reinforced concrete in column structures of high-rise buildings
JIA Jian
2026 Vol. 0 (2): 114- [
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113
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117
Research on anti-seepage construction technology for concrete structures in high water level environments
XUE Bingxiang, et al
2026 Vol. 0 (2): 117- [
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125
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120
Research and application of crack prevention technology for concrete structures in building construction projects
ZHANG Wenxin
2026 Vol. 0 (2): 120- [
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115
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123
Analysis of stability of surrounding rock of underground plant chamber group and optimization of concrete support structure
ZHU Hua
2026 Vol. 0 (2): 123- [
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103
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126
Research on cost of self-insulation autoclaved aerated concrete blocks in prefabricated buildings
ZHONG Xiuhua
2026 Vol. 0 (2): 126- [
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141
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129
Analysis of causes of concrete void in the second inner wall of tunnel and research on prevention and control construction techniques
REN Tiantian
2026 Vol. 0 (2): 129- [
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134
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132
Research on key technologies for quality control in large volume concrete construction in winter
LIU Weiqi
2026 Vol. 0 (2): 132- [
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133
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135
Design of green construction technology and environmental management plan for concrete projects
KONG Pei, et al
2026 Vol. 0 (2): 135- [
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162
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138
Research on construction technology for large slope concrete pavement of municipal roads
HUANG Hailong
2026 Vol. 0 (2): 138- [
Abstract
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116
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141
Construction standardized management system for cracking prevention in concrete structures
CHEN Xiaoyan
2026 Vol. 0 (2): 141- [
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154
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144
Research on mechanism and bearing capacity of HPE hydraulic vertical insertion of steel pipe columns and concrete working together
TIAN Guoqiang
2026 Vol. 0 (2): 144- [
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112
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147
Research on construction technology system of unbonded prestressed concrete for dams
LUO Wenzhe
2026 Vol. 0 (2): 147- [
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121
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150
Technical specification for ultrasonic testing of crack depth in hydraulic concrete structures
XU Hailiang, et al
2026 Vol. 0 (2): 150- [
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148
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