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2018 Vol. 0, No. 12
Published: 2018-12-04
3
Effect of sulphoaluminate-based strength-promoting and shrinkage-reducing admixture on properties of cement
WANG Xiaoying, et al.
The change rule of water requirement of cement standard consistency, cement setting time, 28 d drying shrinkage of cement and mortar strength with different content of sulphoaluminate-based strength-promoting and shrinkage-reducing admixture (SP-SRA) in different kinds of cement such as P·I cement and P·O cement were studied. Effect of different content of SP-SRA on hydration heat, phase and micromorphology of hydration products of P·I cement were analyzed. The results showed that the setting time and 28 d drying shrinkage of cement have evidently decreased and both the strength and the early hydration rate were increased as increasing of content of SP-SRA. The results obtained from XRD and DSC have proven that SP-SRA accelerate the formation of AFt. The results of MIP showed that the quantity of little pores in cement mortar were increased, which indicates that the hydration products such as AFt filled the pore space of cement stone, which results in decreasing of the number of large pores and increasing of the number of little pores. The cement stone was denser, and its strength increased. The expansion of AFt compensates the partial shrinkage, so that the drying shrinkage of cement with SP-SRA was reduced.
2018 Vol. 0 (12): 3- [
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359
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9
Study on chlorine ion washing and cement solidification in MSWI fly ash
Hot!
NING Huayu
The elution influence of the washing pre-treatment process with deionized water on soluble chlorine in MSWI fly ash and the optimum processing were studied. Moreover, the strength (3 d and 28 d) and microstructure (morphology and distribution of crystal phase) of blended cements with different content of the treated MSWI fly ash were researched. The results showed that associated with the washing process in the liquid-solid ratio of 10, most of the chloride ions in MSWI fly ash could be removed. The improvement of the liquid-solid ratio could also increase the amount of chlorine removal, but with a limited impact. There was not directly relationship between washing time and the washout rate of chloride ion. The washed and unwashed MSWI fly ash as a cement mixing material, involved in the cement hydration process, would generate expansion and cracking phenomenon, and with the addition of fly ash and the phenomenon is more obvious. The early strength of cement block that adding 10% fly ash close to that non-doped fly ash, but the latter strength should be decreased intensity. The early strength and latter strength of cement block that mixing 20%, 30% and 40% fly ash were very close, but strength was only about half of the block non-doped fly ash. According to the SEM and XRD analysis, compared with the blank sample, the cement block that adding fly ash had less Ca(OH)2 crystal and crystal size was smaller, and containing more unhydrated SiO2.
2018 Vol. 0 (12): 9- [
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481
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16
Damage phenomenon of refractory in co-processing process and its mechanism and settlements
Hot!
WANG Yudong
2018 Vol. 0 (12): 16- [
Abstract
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354
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21
Effect of calcined system on clinker strength
QIAN Yougui
2018 Vol. 0 (12): 21- [
Abstract
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340
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24
Deficient factor analysis and solutions of coal mill blast
JI Wenyong
2018 Vol. 0 (12): 24- [
Abstract
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453
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27
Reformation measure of output increment of MLS4028 raw meal mill
Hot!
SHI Zhichen, et al.
2018 Vol. 0 (12): 27- [
Abstract
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315
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29
Using nano-insulating blanket to reduce sliding shoe temperature at discharge end of cement mill
ZHANG Haitao, et al.
2018 Vol. 0 (12): 29- [
Abstract
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355
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31
Application of efficient permanent magnet motor in JLM46.4 raw meal mill
LIN Yuquan, et al
2018 Vol. 0 (12): 31- [
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349
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33
Analysis for clinker bucket chain conveyor off tracking and its treatment
LI Chuansong
2018 Vol. 0 (12): 33- [
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350
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35
Difficulty and countermeasures of roller liner turnup of FLS ATOX50 mill
ZHANG Xianfeng, et al.
2018 Vol. 0 (12): 35- [
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298
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37
Emergency processing scheme of spherical tile craze in rotary kiln
ZONG Yanlong
2018 Vol. 0 (12): 37- [
Abstract
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289
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39
Application analysis for metal fiber filter material in cement dust extraction domanial
YANG Qing, et al.
2018 Vol. 0 (12): 39- [
Abstract
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268
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42
Anti-corrosion measurement of dust collector at kiln end
WANG Huamin
2018 Vol. 0 (12): 42- [
Abstract
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322
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44
Treatment measure of filter bag breakage of bag dust collector at kiln outlet
ZHAO Xinhui, et al.
2018 Vol. 0 (12): 44- [
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361
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46
Analysis and research of acid condensation phenomenon in dust collector at kiln end
SHI Yong
2018 Vol. 0 (12): 46- [
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360
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49
Design scheme comparison of two types weighing scale using in trade measures of ship unloading system at inland terminal depot
ZHOU Xiaogang, et al
2018 Vol. 0 (12): 49- [
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260
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51
Use problem and treatment measures of temperature measurer in cement plant
HAN Xijun
2018 Vol. 0 (12): 51- [
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308
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53
Fault analysis and treatment of Siemens Simocode intelligent controller
LIU Shenglin
2018 Vol. 0 (12): 53- [
Abstract
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371
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55
Several handling method of electrical interference in cement production
LI Ning, et al
2018 Vol. 0 (12): 55- [
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295
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57
Revision content introduction of GB/T 200— 2017
MA Zhongcheng, et al
2018 Vol. 0 (12): 57- [
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348
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59
Three cases on equipment maintenance in cement plant
LI Guowei
2018 Vol. 0 (12): 59- [
Abstract
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314
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61
Prolong service life of oil hydraulic pump of grate cooler
ZHANG Bolong, et al
2018 Vol. 0 (12): 61- [
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276
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62
Prolong service life of oil hydraulic pump of grate cooler
ZHANG Bolong, et al
2018 Vol. 0 (12): 62- [
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426
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64
Application example of rapping apparatus renovation of waste heat power generating boiler in cement kiln
LI Gaosong, et al
2018 Vol. 0 (12): 64- [
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301
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