Nile Journal for Sciences and Engineering (NJSE)

Evaluation of Superplasticizer Effects on the Properties of Workability and Water Absorption of Concrete Mixes

2025-01-26T11:57:07+00:00

n order to satisfy the needs of engineers and contractors, this research aims to examine the effects of superplasticizers on the qualities of workability and water absorption of concrete mixes when combined with local materials. The methodology used to accomplish the research's goals focuses mostly on data gathering from many sources, a thorough evaluation of prior studies, creating concrete mixes, and conducting several laboratory trials utilizing various ratios of superplasticizer with low water concentrations. By creating 12 cubes for each sample, the ratios of superplasticizer applied were 0.0 (as a reference mix), 0.4, 0.8, 1.2, and 1.5 liters/50 kg cement for concrete ages of 3, 7, and 28 days. Graded natural coarse and fine with local ordinary Portland cement (OPC) were used for all concrete mixes conducted in this research. The experimental findings showed that the ratio of superplasticizers with a reduction of 15% (w/c) to 50 kg of cement (0.8 liters) significantly improved the workability of concrete. Additionally, there has been great workability with the ratios of 1.5L per 50 kg of cement with a 30% reduction in water/cement and 0.4L per 50 kg of cement with a 10% reduction in water/cement. However, the absorption values exhibited no variations with respect to the SP or w/c content ratios that were utilized. According to the results, superplasticizers increase the workability of the concrete mix while lowering the water-cement ratio to improve its characteristics.

Study of the Occupational Safety and Health System for Cement Factories in the River Nile State

2025-01-26T11:57:10+00:00

Occupational safety and health in the field of maintenance of cement factories is one of the important elements due to its association with risks, and most of the cement factories in Sudan did not show interest and priority in the safety system. The aim of this paper is survey workers' opinions about the safety system in the production line of the Nile River State factories, discuss and analyze them, and reach results that contribute to improving the safety and health system in the state's cement factories. The study dealt with an introduction to safety, which included the elements of production, the importance of safety, the research objectives, and the research problem. It also relied on the descriptive approach, and questionnaires distributed to different parties. The study reached many results, including: There are risks in the cement factories in the Nile River state, including: conveyor belt risks - machinery movement risks - electricity risks - fire risks - production facilities risks.

Contribution of Exponential and Integral Functions in some Probability Distributions

2025-01-26T11:57:13+00:00

This article reviews and interprets exponential and integral functions on representations of some probability distributions. The literature survey covers Poisson distribution, Normal Distribution, Exponential Distribution, Gamma Distribution, and Weibull Distribution. The article explained in detail the contribution of both functions on the chosen probability distributions. The most important recommendation for those who want to be good statisticians is that they must have a good background in mathematics.

Applications of Orlicz-Lorentz Spaces in Gateaux Differentiability

2025-01-26T11:57:14+00:00

This study aimed to study Gateaux differentiability of the functional and of the Luxemburg norm, it followed the descriptive method and the study found that we can obtain the one-sided Gateaux derivatives in both cases by characterizing those points where the Gateaux derivative of the norm exists, we obtain a characterization of best -approximants from convex closed subsets, there a relation between best -approximants and best approximants from a convex set.

Divisibility Test of Numbers by Some Prime Ones (7, 13, 17, 19, 23, 29)

2025-01-26T11:57:15+00:00

The purpose of this paper is finding rules to know whether any number is divisible by some primes (7, 13, 17, 19, 23, 29), so that we use divisibility test and concept of congruence relation in numbers theory. The conclusion of the study arrived that we can know that any natural number is divisible by any prime without doing division.

A sharp Trudinger-Moser Type Inequality for Unbounded Domains and Higher Order Derivatives

2025-01-26T11:57:16+00:00

The Trudinger- Moser inequality states that for functions of bounded domain with one has , with independent of . It is shown that for the bound may be replaced by a uniform constant independent of if the Drichlet norm is replaced by the Sobolev norm.In this paper the results for have been showed with a lower bound and gradient estimate.

On The Topological Groups and Their Compactifications

2025-01-26T11:57:19+00:00

In this paper some topics in topological groupshas beendiscussed, and the compact spaces and compactifications of topological groups were stated.Firstly, many definitions have been statedand followed by many examples of topological groups, some theorems have been included which are propositions and lemmas as well asthe locally compact abelian topological groupswere discussed.Secondly, the paper included a compactification of topological groups and prove some theorem and some propositions concern this topic.

Assessment of Drinking Water Quality at Source and Point of use of Alazhari City

2025-01-26T11:57:21+00:00

The present paper is aimed to assess the drinking water quality at source (ground water wells) and the point of use (Taps) at Al-Azhari city. The physicochemical and biological analysis of drinking water was carried out and results were compared with permissible limits established by the World Health Organization (WHO) and the Sudanese Standards and Metrology Organization (SSMO). The parameters subjected to the study were pH, TDS, EC, hardness, alkalinity, chloride, Mg, Ca, K, Na as well as bacteriological analysis. All the physicochemical parameters of drinking water samples collected from Al-azhari city are within permissible limit set by WHO and SSTO. Tap6 recorded relatively higher conductivity value (1040 μS/cm). The pH of the water ranged from 6.6 to 8.3 and TDS varied between 145.6 to 728 mg/l, EC varied between 224 and 1040 μS/cm, hardness varied between 84 and 262 mg/l, alkalinity varied between 20 to 576.2 mg/l, chloride varied between 9 and 99.93 mg/l. The heavy metals concentrations were 0.004 to 45.67, 18.4 to 68.93, 0.1 to 12.81, and 1.1 to 190 mg/l for Mg, Ca, K and Na respectively. The microbiological analysis had shown that all household waters except Tap2 were contaminated with E-coli. The absence of E. coli in wells 4, 5 and 6 and its presence in Taps4, 5 and 6 concluded that water in its way to households carry pollution through water distribution system.

Prevalence of Eimeria Species in Goats in EdDamer Locality, River Nile State, Sudan

2025-01-26T11:57:23+00:00

Monthly collection of fecal samples was made from 682 healthy goats in EdDamer Locality, River Nile State, over twelve months period. The species of Eimeria involved in subclinical cases were identified. 82% out of examined goats were found to be positive to Eimeria species and seven Eimeria species were recorded, these were, E. arloingi (96.24%), E. alijevi (64.79%), E. christenseni (54.46%), E. hirci (27.2%) E. ninakohlyakimove (24.88%), E. jolchijevi (16.43%), and E. apsheronae (14.84%). The prevalence of Eimeria species differed significantly (P<0.05). The prevalence of all identified species was higher in young age groups, but no significant difference was observed (p>0.05), between the three examined age groups. The prevalence of species during different seasons did not also seem to vary significantly (P>0.05), but the prevalence of all identified species was higher during Summer.