Developing Specification Limits for Hot Mix Asphalt Properties and Impact on Pay Factors

Al-Khayat, Haydar; Gurganus, Charles; Newcomb, D E; Sakhaeifar, Maryam S.

doi:10.1061/jpeodx.0000185

Cited by 4 publications

(8 citation statements)

References 2 publications

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“…The study also agreed with Salman et al (13) , where the highest percentage of males was recorded at 56 and (82.35%) more than females whose number of injuries exceeded 12 and by (17.64%). It agrees with Al-Khayyat et al, (14) in the governorate of Baghdad, where it recorded the highest rates of infection in males by (60.3%) compared to females by (39.6%). The study differed with Kattoof, (15) in Baghdad Governorate, where it recorded the highest rate of infection among females, as it reached (24%) in comparison with males (21%).…”

Section: Discussionsupporting

confidence: 91%

Investigation of Cutaneous Leishmaniasis Cases in Baghdad province, Iraq

2021

MLU

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444 cases were recorded of cutaneous leishmaniasis in Baghdad General Hospitals and some private clinics in Baghdad city and reviewed during the period from 1/10/2019 until 5/2020. The lesions were clinically diagnosed by dermatologists. Where the highest incidence was among males compared to females, it was found that the age group of (1-10) and (10-20) is the highest injury and that the rest of the age groups showed a decline. It was clear that the lowest percentage was among (50-60 yrs) patients, and the highest injury among the youth category. The rate of infection was higher in rural and agricultural areas compared to the city center. The infection rates in relation to different body sites are the highest in the upper extremities compared to the lower extremities. And according to the ulcer number, the multiple types were more than the single ulcers, and regarding the time of infection the highest rates of infection appear in December and February compared to the rest of the year.

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Section: Discussionsupporting

confidence: 91%

Investigation of Cutaneous Leishmaniasis Cases in Baghdad province, Iraq

2021

MLU

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“…The above equation assumes a normal distribution associated with the parameters of interest (i.e., AC and density). In fact, and based on historical construction materials test results, material testing data follow the normal distribution (Al-Khayat, 2018).…”

Section: Methodsmentioning

confidence: 99%

“…DOTs can use QC data for payment when the t-test and F-test are passed. A study with 42 state DOTs responding showed that 27 DOTs used QC data for acceptance of the asphalt mixture after verification (Schmitt et al, 1998;Al-Khayat, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Determining the Optimum Sample Size for Quality Assurance (QA) of Asphalt Mixtures: A Case Study

Al-Khayat

Gurganus

Newcomb

et al. 2022

BJRBE

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Acceptance plans for asphalt mixtures use a certain sample size that is often established based on the purpose of sampling, population size, risk, and allowable error for evaluation. The rate of quality control (QC) sample size is often higher than the quality assurance (QA) sample size. The test results obtained from the QA samples are commonly used to validate the QC test results and to assist the state department of transportation (DOT) with payment decisions. However, if the QA sample size is insufficient to make accurate judgments, the probability of making incorrect decisions regarding acceptance increases. On the other hand, oversampling needlessly consumes both time and cost. To identify the appropriate sample size for QA testing, a balance must be struck between a number of variables. In this case study, two models were developed using the Oregon Department of Transportation (ODOT) data to determine the appropriate QA sample size. The need for this work was realized when a review of ODOT paving projects revealed a large variability in lot size. These ranged from 3000 to more than 100 000 tons with commensurate QA sample size rates. The typical standard deviation (STDEV) values of asphalt content (AC) and in-place density were determined. The developed models show that using the STDEV values that represented more than 90 percent of the projects, ODOT needed to increase QA sample size for both AC and density in lots of less than 22 000 tons. The results also show that sample can be decreased for AC and remain as is for density in projects of more than 22 000 tons of asphalt mixtures. The proposed models can be used to determine the optimum sample size for different lots sizes.

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“…Figure(1) shows the relationship between the level of immunoglobulin G in people with cutaneous leishmaniasis (1205.100 ± 210.155) compared to the control group (933.766 ± 133.652) and at the probability level (p≥0.05).…”

mentioning

confidence: 99%

Study Molecular and Immunological Techniques for Detection of Leishmania Tropical, Major in Baghdad , Iraq

Alnaimy

Al-Waaly²

2021

Al-Qadisiyah Journal of Pure Science

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The study was conducted on 444 patients suffering from skin lesions of different ages and genders that were diagnosed by dermatologists as cutaneous leishmaniasis for people reviewing and throughout the days of the week for the department of epidemiology and transitional diseases who attended to hospitals in the city of Baghdad, namely (Al-Shaheed Dari Al Fayyad Teaching Hospital , Al-Shaheed Al Sadr Hospital , Al-Numan Teaching Hospital, Al-Karama Teaching Hospital) for the study period from October 1, 2019 until the end of March 2020. The methods of molecular diagnostics showed that multiplex pcr examined40 random samples of the parasite that were collected throughthis technique from blood samples taken from the ulcers of infectedpeople to reveal the DNA parts of the Leishmania parasite. Specialprefixes for the Leishmania parasite species showed that 28 positive samplescontain the parasite's DNA and 12 negative samples, of which 11 are forthe Leishmania tropica type (27.5%) and 17 samples for the Leishmania major type(42.5%) at the molecular weight 1150 base pair. 30 serum samples were taken from patients diagnosed with cutaneous leishmaniasis for serological tests. The current study showed a significant decrease in immunoglobulin G for patients with cutaneous leishmaniasis by 1205.100 ± 210.155 , The current results also showed a significant decrease in the level of immunoglobulin M in patients with cutaneous leishmaniasis by 90.366 ± 26.181

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Developing Specification Limits for Hot Mix Asphalt Properties and Impact on Pay Factors

Cited by 4 publications

References 2 publications

Investigation of Cutaneous Leishmaniasis Cases in Baghdad province, Iraq

Investigation of Cutaneous Leishmaniasis Cases in Baghdad province, Iraq

Determining the Optimum Sample Size for Quality Assurance (QA) of Asphalt Mixtures: A Case Study

Study Molecular and Immunological Techniques for Detection of Leishmania Tropical, Major in Baghdad , Iraq

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