Pub Date : 2022-06-30DOI: 10.25079/ukhjse.v6n1y2022.pp52-60
Heba Adnan Ahmed
Geotechnical engineering requires the use of ecologically acceptable, long-lasting, and effective solutions to fortify clayey soil. The mechanical behavior of clayey soil strengthened with carbon fibres (CFs) was studied in this work. Soil specimens were subjected to uniaxial compression strength tests at their optimal moisture content (OMC). The impacts of CFs length and percentage on the strengthened soil specimens' shear resistance, and stress-strain curve behavior were investigated. The effect of CFs on specimen cohesiveness and angles of internal friction was also investigated. The results showed that adding CFs to clayey soil can increase its shear resistance and cohesiveness greatly. Because the fibres can be spread easily in soil samples and had a suitable length that can generate an interlaced network among soil grains that restricted soil movement once exposed to external stresses, it is presumed that utilizing three percent of CFs weight content had six millimeters length could indeed give the highest impact on resistance development among all the specimens.
{"title":"Impact of Carbon Fibre on Mechanical Characteristics of Clayey Soil Under Several Normal Stress","authors":"Heba Adnan Ahmed","doi":"10.25079/ukhjse.v6n1y2022.pp52-60","DOIUrl":"https://doi.org/10.25079/ukhjse.v6n1y2022.pp52-60","url":null,"abstract":"Geotechnical engineering requires the use of ecologically acceptable, long-lasting, and effective solutions to fortify clayey soil. The mechanical behavior of clayey soil strengthened with carbon fibres (CFs) was studied in this work. Soil specimens were subjected to uniaxial compression strength tests at their optimal moisture content (OMC). The impacts of CFs length and percentage on the strengthened soil specimens' shear resistance, and stress-strain curve behavior were investigated. The effect of CFs on specimen cohesiveness and angles of internal friction was also investigated. The results showed that adding CFs to clayey soil can increase its shear resistance and cohesiveness greatly. Because the fibres can be spread easily in soil samples and had a suitable length that can generate an interlaced network among soil grains that restricted soil movement once exposed to external stresses, it is presumed that utilizing three percent of CFs weight content had six millimeters length could indeed give the highest impact on resistance development among all the specimens.","PeriodicalId":169900,"journal":{"name":"ISSUE TEN","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132868043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Rahman, Imad A. Aziz, Fuad W. Khdhr, Dler Mahmood
Up to April 9, 2020, 142490 cases have been confirmed as COVID-19 infection including 5705 associated deaths in the Middle East. Most of the countries, such as Qatar, Bahrain, Iraq, Kuwait, United Arab Emirates (UAE), Oman, Lebanon, and Saudi Arabia have imported COVID-19 cases from Iran. Using the available data from WHO webpage, up to 9 April 2020, we traced epidemic curves and estimated the basic reproduction number ( ) of COVID-19 through the susceptible-infectious-recovered (SIR) model for the Middle East countries. Epidemic curves for Middle East countries and territory show similar trend as Iran, with a couple of weeks’ delay in time. In SIR model, ranged between 7.41 as in Turkey to lowest as 2.60 for Oman whereas basic reproduction number for Iran, Kuwait, Bahrain, Qatar, Saudi Arabia, United Arab Emirates (UAE), Oman, Jordan, Egypt, Lebanon, Syria, Israel, West Bank and Gaza Strip territory, and Cyprus were 4.13, 2.71, 3.39, 4.18, 4.45, 2.75, 2.60, 3.52, 3.35, 3.16, 4.99, 4.08, 2.89, and 4.05, respectively. This study indicates an important trend on an early outbreak of COVID-19 based on estimated for the Middle East countries, mean 3.76 for COVID-19, with median and interquartile range (IQR) in the Middle East.
{"title":"Preliminary Estimation of the Basic Reproduction Number of SARS-CoV-2 in the Middle East","authors":"B. Rahman, Imad A. Aziz, Fuad W. Khdhr, Dler Mahmood","doi":"10.2471/blt.20.262295","DOIUrl":"https://doi.org/10.2471/blt.20.262295","url":null,"abstract":"Up to April 9, 2020, 142490 cases have been confirmed as COVID-19 infection including 5705 associated deaths in the Middle East. Most of the countries, such as Qatar, Bahrain, Iraq, Kuwait, United Arab Emirates (UAE), Oman, Lebanon, and Saudi Arabia have imported COVID-19 cases from Iran. Using the available data from WHO webpage, up to 9 April 2020, we traced epidemic curves and estimated the basic reproduction number ( ) of COVID-19 through the susceptible-infectious-recovered (SIR) model for the Middle East countries. Epidemic curves for Middle East countries and territory show similar trend as Iran, with a couple of weeks’ delay in time. In SIR model, ranged between 7.41 as in Turkey to lowest as 2.60 for Oman whereas basic reproduction number for Iran, Kuwait, Bahrain, Qatar, Saudi Arabia, United Arab Emirates (UAE), Oman, Jordan, Egypt, Lebanon, Syria, Israel, West Bank and Gaza Strip territory, and Cyprus were 4.13, 2.71, 3.39, 4.18, 4.45, 2.75, 2.60, 3.52, 3.35, 3.16, 4.99, 4.08, 2.89, and 4.05, respectively. This study indicates an important trend on an early outbreak of COVID-19 based on estimated for the Middle East countries, mean 3.76 for COVID-19, with median and interquartile range (IQR) in the Middle East.","PeriodicalId":169900,"journal":{"name":"ISSUE TEN","volume":"288 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127502361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：