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The pH of Cement-based Materials:A Review

Journal of Wuhan University of Technology(Materials Science) 2020年第5期35卷 908-924页

作者： sumra yousuf Payam Shafigh Zainah Ibrahim Department of Civil Engineering Faculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Department of Building and Architectural Engineering Faculty of Engineering&TechnologyBahauddin Zakariya UniversityMultan 60000Pakistan Department of Building Surveying Faculty of Built EnvironmentUniversity of Malaya.50603 Kuala LumpurMalaysia Center for Building Construction&Tropical Architecture(BuCTA)Faculty of Built EnvironmentUniversity of Malaya50603 Kuala LumpurMalaysia

Cement-based materials (CBMs),such as paste,mortar and concrete,are highly alkaline with an initial high pH of approximately 12.0 to *** have a high pH due to the existing oxide mineral portlandite and alkali metal contents in Portland *** high pH of concrete provides excellent protection and reinforces the steel bars against *** pH of concrete does not remain constant due to ageing and other defect-causing factors,such as chloride ingress,alkali leaching,carbonation,corrosion,acid attack,moisture and biodegradation *** the concrete pH has negative impact on the strength,durability and service life of concrete ***,the high pH of concrete may also cause concrete structure deterioration,such as alkali silica reaction,porosity and moisture related damages in concrete *** pH of CBMs can be influenced by high *** instance,the extremely high volume (85%-100%) of slag-blended cement pastes shows considerable pH reduction from 12.80 to 11.34 at 800 ℃.As many concrete structure deterioration are related to concrete pH,using an accurate and reliable method to measure pH and analyse the durability of reinforced concrete structure based on pH values is extremely *** study is a comprehensive review of the pH of CBM in terms of measurement,limitations and varying values for different CBM types.

关键词： pH cementitious materials concrete portlandite durability corrosion alkali

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维普期刊数据库

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Variables Affecting the pH Measurement of Cement Mortars

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Journal of Wuhan University of Technology(Materials Science) 2021年第5期36卷 689-696页

作者： PAYAM Shafigh sumra yousuf ZAINAH Ibrahim Centre for Building Construction&Tropical Architecture(BuCTA)Faculty of Built EnvironmentUniversity of Malaya50603 Kuala LumpurMalaysia Department of Civil Engineering Faculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Department of Building and Architectural Engineering Faculty of Engineering&TechnologyBahauddin Zakariya University60000 MultanPakistan

A quantitative pH measuring method has been used to measure the pH of pure and blended cement *** blended cement mortars incorporating supplementary cementitious materials(SCMs)such as fly ash(FA),ground granulated ballast furnace slag(GGBFS)and palm oil fuel ash(POFA)were ***,different variables affecting the pH values of CBMs such as temperature of sample solution,quantity of sample powder,dilution ratio and temporary storage of sample during pH measuring process have been studied for all cement mortars.

关键词： mortar cementitious materials pH value dilution ratio temperature

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维普期刊数据库

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Chemical and Thermal Characterization of Cement Mortar Containing Ground Palm Oil Fuel Ash as a Partial Cement Replacement

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Journal of Wuhan University of Technology(Materials Science) 2023年第3期38卷 575-581页

作者： sumra yousuf PAYAM Shafigh IFTIKHAR Ahmed Channa M Rizwan TANVEER Ahmed Khan BELAL Alsubari MUSTABSHIRHA Gul l.Department of Building and Architectural Engineering Faculty of Engineering&TechnologyBahauddin Zakariya University60000 MultanPakistan Centre for Building Construction&Tropical Architecture(BuCTA)Faculty of Built EnvironmentUniversity of Malaya50603 Kuala LumpurMalaysia Department of Metallurgical Engineering NED University of Engineering and Technology74200 KarachiPakistan Department of Civil Engineering Faculty of EngineeringMiami College of Henan UniversityKaifeng475001China Department of Mechanical Engineering University of Malaya50603 Kuala LumpurMalaysia Department of Mechanical Engineering Faculty of Engineering&TechnologyBahauddin Zakariya University60000 MultanPakistan

This study investigates the influence of using ground palm oil fuel ash(G-POFA) from 10%-30% as cement replacement(by weight) on the cement mortar's pH under various curing conditions. These findings were supplemented by thermal gravimetric analysis(TGA). Moreover, the resistance of G-POFA blended cement mortars to water absorption and sorptivity was determined. Further, the k-value test was carried out to explain the pozzolanic and filler behavior of G-POFA and to support the results obtained from TGA. It was found that there was no significant impact of several curing conditions on the pH of mortars. The mortar with 10% G-POFA in replacement of cement(G-POFA-10) exhibited the best resistance against water absorption and sorptivity.

关键词： curing condition Ca(OH)_(2)content k-value pH palm oil fuel ash

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NLRP3炎性小体在人食管鳞癌组织和细胞中的表达及意义

NLRP3炎性小体在人食管鳞癌组织和细胞中的表达及意义

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中国药理学会分析药理学专业委员会成立大会、第三届全国分析药理学学术大会暨贵州省药学会药学青年专业委员会成立大会

作者：于爽尹俭俭韩圣娜黄宁 sumra komal 张莉蓉郑州大学基础医学院药理学系

目的:研究NLRP3炎性小体在食管鳞癌中的表达及其与临床特征的相关性,并探索NLRP3炎性小体对人食管鳞癌细胞增殖、侵袭能力的影响。方法:利用qPCR法、Western blot法、ELISA法及免疫组化检测食管鳞癌组织及细胞中NLRP3、ASC、Caspase-1和... 详细信息

目的:研究NLRP3炎性小体在食管鳞癌中的表达及其与临床特征的相关性,并探索NLRP3炎性小体对人食管鳞癌细胞增殖、侵袭能力的影响。方法:利用qPCR法、Western blot法、ELISA法及免疫组化检测食管鳞癌组织及细胞中NLRP3、ASC、Caspase-1和IL-1β的mRNA和蛋白质的表达水平;CCK-8、划痕实验、Transwell实验观察siRNA干扰和转入外源性NLRP3基因后对细胞增殖、迁移和侵袭的影响。结果:(1)组织标本中食管癌组的各炎性因子的mRNA高于癌旁组(P<0.05);与癌旁组相比,westernblot与ELISA结果显示各炎性因子的蛋白表达水平在食管癌组中明显升高(P<0.05)。(2)组织芯片结果中,NLRP3及其相关炎性因子在食管癌组中的阳性表达率明显高于癌旁组(P<0.05),且与肿瘤分期和淋巴结转移存在相关性(P<0.05)。(3)细胞水平结果显示,转入外源性的NLRP3显著增加了细胞的增殖、侵袭能力;干扰其表达后显著降低细胞的增殖、侵袭能力。结论:NLRP3炎性小体影响食管鳞癌发生、发展的过程,可能成为未来食管鳞癌治疗的靶点。

关键词：食管鳞状细胞(ESCC) NLRP3 炎性因子

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