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| 1 | The Influence of Atmospheric Pressure on Air Content and Pore Structure of Air-entrained Concrete显示文摘To study the effect of atmospheric pressure on the properties of fresh and hardened airentrained concrete, three kinds of air entraining agents were used for preparing air-entrained concrete in the plateaus(Lhasa, 61 kPa) and the plains(Beijing, 101 kPa). Air content, slump, compressive strength and pore structure of the three air-entrained concretes were tested in these two places. It is found that the air content of concrete under low atmospheric pressure(LAP) is 4%-36% lower than that of concrete under normal atmospheric pressure(NAP), which explaines the decrease of slump for air-entrained concrete under LAP. Pore number of hardened concrete under LAP is reduced by 48%-69%. While, the proportion of big pores(pore diameter >1 200 μm) and air void spacing factor are increased by 1.5%-7.3% and 51%-92%, respectively. The deterioration of pore structure results in a 3%-9% reduction in the compressive strength of concrete. From the results we have obtained, it can be concluded that the increase of critical nucleation energy of air bubbles and the decrease of volumetric compressibility coefficient of air in the concrete are responsible for the variation of air content and pore structure of concrete under LAP. | 李扬 WANG Zhendi 王玲 | 2019 | Journal of Wuhan University of Technology(Materials Science)2019，34，6： | 11 |
| 2 | Simultaneous determination of endocrine-disrupting phenols and steroidestrogens in sediment by gas chromatography-mass spectrometry显示文摘 | Xianzhi Peng Zhendi Wang Chun Yang | 2006 | Journal of Chromatography A2006，1116，： | 1 |
| 3 | Fractionation of a light crude oil and identification and quantitation of aliphatic, aro- matic,and biomarker compounds by GC-FID and GC MS显示文摘 | WANG Zhendi FINGAS M F LI Ken | 1994 | Journal of Chromatographic Science1994，32，9： | 1 |
| 4 | Differentiation of the source of spilled oil and monitoring of the oil weathering process using gas chromatography-mass spectrometry显示文摘 | WANG Zhendi FINGAS M F | 1995 | Journal of Chro- matography A1995，712，2： | 1 |
| 5 | Development of oil hydrocarbon fingerprinting and identification techniques显示文摘 | Wang Zhendi Fingas M | 2003 | Marine Pollution Bulletin2003，47，： | 1 |
| 6 | Char- acteristics of bicyclic sesquiterpanes in crude oils and petrole- um products显示文摘 | YANG Chun WANG Zhendi HOLLEBONE B P | 2009 | Journal of Chromatography A2009，1216，20： | 1 |
| 7 | Forensic fin- gerprinting of diamondoids for correlation and differentiation of spilled oil and petroleum products显示文摘 | Wang Zhendi Yang Chun Hollebone B | 2006 | Environmental Sci- ence Technology2006，40，18： | 1 |
| 8 | Forensic fingerprinting of biomarkers for oil spill characterization and source identification 显示文摘 | Wang Zhendi Stout S A Fingas M | 2006 | Environmental Forensics2006，7，2： | 1 |
| 9 | Simultaneous determination of endocrine-disrupting phenols and steroid estrogens in sediment by gas chromatography-mass spectrometry显示文摘 | PENG Xianzhi WANG Zhendi YANG Chun | 2002 | J Chromatogr: A2002，977，： | 1 |
| 10 | Evolution and Characterization of Damage of Concrete under Freeze-thaw Cycles显示文摘To study the internal damage of concrete under freeze-thaw cycles, concrete strains were measured using embedded strain gauges. Residual strain and coefficients of freezing expansion (CFE) derived from strain-temperature curves were used to quantify the damage degree. The experimental results show that irreversible residual strain increases with the number of freeze-thaw cycles. After 50 cycles, residual strains of C20 and C35 concretes are 320με and 100με in water, and 120 με and 60 με in saline solution, respectively. In lower temperature range (-10 ℃ to -25 ℃) CFE of C20 and C35 concretes decrease by 9.82×10-6/K and 8.44×10-6/K in water, and 9.38×10-6/K and 5.47×10-6/K in saline solution, respectively. Both residual strains and CFEs indicate that during the first 50 freeze-thaw cycles, the internal damage of concrete in saline solution is less than that of concrete in water. Thus residual strain and CFE can be used to measure the frost damage of concrete. | 王玲 CAO Yin WANG Zhendi DU Peng | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，4： | 1 |
| 11 | Development of oil hydrocarbon fingerprinting and identification techniques显示文摘 | WANG Zhendi FINGAS M F | 2003 | Marine Pollution Bulletin2003，47，： | 1 |
| 12 | Fractionation of a light etude oil and identification and quantitation of aliphatie, aromatic, and biomarker compounds by GC - FID and GC - MS, Part Ⅱ显示文摘 | WANG Zhendi FINGAS M F LI Ken | 1994 | Journal of Chromatographic Science1994，32，： | 1 |
| 13 | Developments in analysis of petroleum hydrocarbons in oils,petroleum products and oil-spill-related environmental samples by gas chromatography显示文摘 | WANG Zhendi MERV Fingers | 1997 | Journal of Chromatography A1997，774，： | 1 |
| 14 | Fractlonation of a light crude oil and identification and quantitation of aliphatic, aromatic, and biomarker compounds by GC -FID and GC -MS, Part Ⅰ显示文摘 | WANG Zhendi FINGAS M F LI Ken | 1994 | Journal of Chromatographic Science1994，32，： | 1 |
| 15 | A preliminary study on the occurrence and behavior of sulfon- amides, ofloxacin and chloramphenicol antimicrobials in wastewaters of two sewage treatment plants in Guangzhou, China显示文摘 | Peng Xianzhi Wang Zhendi Kuang Wenxing | 2006 | Science of the Total Environment2006，371，13： | 1 |
| 16 | Characterization and source identification of hydrocarbons in water samples using multiple analytical techniques显示文摘 | Wang Zhendi Li K Fingas M | 2002 | Journal of Chromatography A2002，971，12： | 1 |
| 17 | A preliminary study on the occurrence and behavior of sulfonamides, ofloxacin and chloramphenicol antimicrobials in wastewaters of two sewage treatment plants in Guangzhou,China 显示文摘 | Peng Xianzhi Wang Zhendi Kuang Wenxing | 2006 | Science of the Total Environment2006，371，123： | 1 |
| 18 | Developments in the analysis of petroleum hydrocarbons in oils petroleum products and oil-spill-related environmental samples by gas chromatography显示文摘 | Fingas Merv | 1997 | Chromatography A1997，774，： | 1 |
| 19 | Development of oil hydrocarbon fingerprinting and identification techniques显示文摘 | Fingas Merv F | 2003 | Marine Pollution Bulletin2003，47，： | 1 |
| 20 | Characterization and identification of the detroit river mystery oil spill 2002显示文摘 | Fingas M Lambert P | 2004 | Journal of Chromatography A2004，1038，： | 1 |
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