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2025 Vol. 0, No. 05
Published: 2025-05-10
1
Study on high thermal conductivity cement slurry for geothermal well
YANG Yukun, et al.
As a green and renewable energy source, geothermal energy has great mining prospects. Improving the thermal conductivity of cementing cement stone in geothermal wells can improve the efficiency of geothermal resource exploitation. The existing high thermal conductivity cement slurry for geothermal wells faces difficulties such as low thermal conductivity and poor compatibility of slurry. Through the researches on the optimization and compounding of high thermal conductivity fillers, the compatibility between high thermal conductivity cement slurry and cementing admixtures, and the influence of admixtures on the thermal conductivity and application performance of cement slurry, a cement slurry system with good application performance and thermal conductivity higher than 1.80 W/(m·K) was prepared by adding flake graphite, iron ore powder and other admixtures, which was suitable for the cementing requirements of geothermal wells. Due to good electron heat transfer or phonon heat transfer ability of the high thermal conductivity filler, it can improve the thermal conductivity of oil well cement by two mechanisms of close packing and thermal conduction path after reaching a certain amount of addition
2025 Vol. 0 (05): 1- [
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5
Numerical simulation analysis and optimal arrangement of cement SCR denitration static mixer
REN Xuan, et al
2025 Vol. 0 (05): 5- [
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5
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8
Hazardous waste disposal practice in our company
QU Wenkai, et al.
2025 Vol. 0 (05): 8- [
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4
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12
A review on in-situ dry reforming of carbon dioxide coupled with decomposition of carbonate minerals
LIU Zhenggang, et al.
2025 Vol. 0 (05): 12- [
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7
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16
Study on green low-carbon technical emission reduction path of cement production
WANG Jitao, et al.
2025 Vol. 0 (05): 16- [
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6
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19
Practice of improving production and reducing consumption of aggregate production line in cement plant
ZHANG Xu
2025 Vol. 0 (05): 19- [
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5
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24
Application of petrographic analysis in clinker quality control
DENG Lei, et al.
2025 Vol. 0 (05): 24- [
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4
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27
Practice of using diatomite waste residue to replace part of sandstone raw materials for clinker production
WU Hehe, et al.
2025 Vol. 0 (05): 27- [
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5
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29
Final grinding system of roller press for preparing raw material and producing desulphurized stone powder#br#
Hot!
WEN Youqiang
2025 Vol. 0 (05): 29- [
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8
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32
Influence of improving separation efficiency of C1 cyclone on sintering system
Hot!
LI Liang, et al.
2025 Vol. 0 (05): 32- [
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7
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35
Determination of coal content in cone part of calciner in graded fuel combustion
Hot!
TANG Xinyu, et al.
2025 Vol. 0 (05): 35- [
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7
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38
Transformation and effect analysis of fourth generation grate cooler
Hot!
CHEN Cheng
2025 Vol. 0 (05): 38- [
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7
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41
Optimization of cement conveying and packaging system
LI Qiang, et al.
2025 Vol. 0 (05): 41- [
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5
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43
Maintenance and operation of bag dust collector of coal grinding system in winter
WU Sihai, et al
2025 Vol. 0 (05): 43- [
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8
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46
A free calcium oxide monitoring model based on deep learning and attention mechanism
SHEN Tong, et al
2025 Vol. 0 (05): 46- [
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6
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51
GB/T 750-2024 "Test method for autoclaved stability of cement" standard revision introduction
ZENG Zheng, et al
2025 Vol. 0 (05): 51- [
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5
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54
Measures to prevent material accumulation in circulating fan
JIN Guanghui, et al.
2025 Vol. 0 (05): 54- [
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6
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55
Analysis and improvement of abnormal wear of head wheel and chain of chain conveyer of kiln head dust collector
ZHANG Quanlei, et al.
2025 Vol. 0 (05): 55- [
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6
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57
Practice of comprehensive upgrading and reconstruction of limestone pile reclaimer
LV Chengcui
2025 Vol. 0 (05): 57- [
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6
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58
Analysis and treatment of fracture of anchor bolt of raw material vertical mill frame
LUO Binwen, et al.
2025 Vol. 0 (05): 58- [
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6
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60
An improvement device for three-way valve for side feeding
WANG Fuhua, et al.
2025 Vol. 0 (05): 60- [
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5
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62
Study on high temperature impact resistance of fly ash-slag base polymer
CHANG Zhiyang, et al.
In this paper, the Split Hopkinson Pressure Bar (SHPB) test system is used to study the effects of mixture ratio, temperature and strain rate of slag-fly ash-based geopolymer on the impact resistance. The experimental results demonstrate that with increasing mass ratio of fly ash to slag, the peak stress of the geopolymer decreases while the peak strain increases. At the fixed slag-fly ash mass ratios, the peak stress shows positive correlations with alkali activator content and sodium silicate modulus. The increase of calcination temperature will exacerbate material degradation, which is manifested as progressive reductions in peak stress and strain. Higher strain rates enhance peak stress and strain, indicating pronounced ductile failure characteristics.
2025 Vol. 0 (05): 62- [
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6
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66
Effect of sand rate on dispersion resistance and mechanical properties of newly watered non-dispersed concrete
ZHANG Lin, et al.
2025 Vol. 0 (05): 66- [
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5
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69
Prediction of filling material ratio and strength by orthogonal test and BP neural network
WANG Haibo, et al.
2025 Vol. 0 (05): 69- [
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4
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75
Preparation and properties of polycarboxylic acid water-reducing agent with slump retention and viscosity reduction
SUN He, et al.
In this paper, HPEG 2400 and TPEG3000 were used as polyether macromonomers, AMPS and polyethylene glycol diacrylate were used as functional monomers, and a slump preserving and viscosity reducing polycarboxylic acid water-reducing agent (B-PCE) was synthesized by free radical polymerization of aqueous solution. The concrete test results show that B-PCE has good dispersibility and viscosity reduction effect in concrete, and its compressive strength is improved. With the increase of molar ratio of AMPS, the dispersibility of water reducing agent can be effectively improved and the viscosity of slurry can be reduced. The GPC test results show that the molecular mass distribution width of B-PCE is wider (PDI=4.18) after adding polyethylene glycol diacrylate, and the branched cross-linking effect of polyethylene glycol diacrylate in PCE molecules forms a stereo conformation, which is the main reason for the stronger adsorption and anchorage force of polycarboxylic acid water reducer and the improvement of water reduction rate and slump retention performance.
2025 Vol. 0 (05): 75- [
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79
Study on influence of SNF-C naphthalene superplasticizer on properties of cement-solidified radioactive styrene type cincation exchange resin
YANG Kang, et al.
2025 Vol. 0 (05): 79- [
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3
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83
Application of green concrete in municipal pipeline construction
ZHOU Zhonghua
2025 Vol. 0 (05): 83- [
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5
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86
Research on concrete construction technology of underground utility tunnels based on complex geological conditions
SUN Bing
2025 Vol. 0 (05): 86- [
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6
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89
Key technologies for controlling rebound rate of wet shotcrete in tunnels
YU Hongfang
2025 Vol. 0 (05): 89- [
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5
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92
Influence and optimization of cement-stabilized base on bearing capacity of highway subgrade
WANG Jianbiao
2025 Vol. 0 (05): 92- [
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5
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95
Construction technology of pouring concrete for expressway bridge decks
ZHENG Chenggang, et al.
2025 Vol. 0 (05): 95- [
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5
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98
Optimization of mix proportion of high-performance concrete for municipal roads and bridges
LI Zexing
2025 Vol. 0 (05): 98- [
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5
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101
Research on construction technology of heavy-duty radiation-proof concrete
XU Fengnian
2025 Vol. 0 (05): 101- [
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4
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104
Research and application of detection methods for concrete strength and durability of urban roads
YANG Xinxin, et al.
2025 Vol. 0 (05): 104- [
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5
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