Application of the Technique For Order Preference By Similarity To Ideal Solution Method in Determining Contract Employees to Become Permanent Employees

Refratech Mandala Perkasa (RMP) is a refractory cement manufacturing company. The company also operates in the manufacture of refractory cement made for repair of hot coatings, boilers, rotary kilns, incinerators, ovens and chemicals for steel metals, as well as ferrous & non ferrous foundries. In this company there are contract employees and permanent employees, contract employees are employees or workers whose working period is limited by a certain time according to the agreement within the company. While permanent employees are workers whose working period is approximately until they receive certain benefits according to the work agreement. This research was conducted to assist companies in decision support using the Topsis method in determining the appointment of contract employees to permanent employees based on predetermined criteria, namely Knowledge and Skills at work, Quantity and Quality of Work, Job Responsibilities, Initiatives in Work, and Compliance. on rules or discipline. The results of this study indicate that the determination of the ranking of prospective permanent employees can be obtained from the calculation results of the TOPSIS method, where the results of prospective employees are based on predetermined administrative criteria. Prospective permanent employees who have the highest rank have the right to be selected first. The accuracy of the implementation of the TOPSIS method on the system plays a major role in the effectiveness and efficiency of the company's services to consumers compared to before the system was implemented. With the implementation of this DSS system, it can help companies to make it easier to make decisions to survey prospective permanent employees and optimize employee performance.

Influence of the Variability of Limestone and Fly Ash on the Setting and Mechanical Properties of a Moroccan Composite Cement

The Moroccan cement industry is looking for new processes to effectively minimize the high energy costs associated to cement manufacturing. This work presents the effect of three types of limestone with different chemical compositions and different CaCO3 contents on the physical and mechanical properties of resulting composite cements by the addition of fly ash in the proportions by weight of: 5 % and 10 %. The samples are studied in order to evaluate the interaction between different types of limestone and fly ash. Ternary cements based on fly ash-limestone-clinker induce a significant prolongation of the setting time compared to binary cements based on limestone-clinker. The substitution of clinker by limestone induces an improvement in mechanical strength compared to ternary cements in the first days; at 28 days, cements prepared with fly ashes reach significant strength due to their pozzolanic reaction.

Cement Dust Effect from Bokajan Cement Factory on Residents of Vicinity Area: A Study in Assam, India

Cement manufacturing industries are one of the most common reasons of air pollution, surface and ground water pollution and noise pollution and is also indirectly affecting the people residing near the cement plants. This study was carried out to quantify the cement dust emission from Bokajan Cement Corporation of India’s cement factory falling on the residences and to determine its effect on some selected household activities and general well-being of the people residing near it. An experimental method was carried out to estimate the accumulated cement dust in households. The findings showed that household activities performed by the residence were dependent upon the dust exposure, which means more the dusts are more are the cleaning and maintenance. It was also found that cement dust highly affected general wellbeing of the respondents living in southern direction and lowest affect was observed among the respondents of the east direction.

Evaluation of overall equipment effectivity in the cement manufacturing industry: a case study

Overall equipment effectiveness is one of the important tools to measure the productivity in the company. This research is based on a case study of cement manufacturing industry in Indonesia, especially in kiln machine. The research aims to investigate the six big losses. In addition, the calculation of availability components, performance efficiency, and quality rate are carried out. The fishbone diagram is also employed to identify the root cause of the problem deeply. The results show the biggest losses in the kiln machine are the reduced speed losses. Therefore, the availability component and the performance efficiency should be improved to increase the productivity and the efficiency in the shop floor. Some suggestions are presented such as make a better surveillance system, improve the planning of preventive maintenance machine, and replace the more sophisticated maintenance tools to facilitate maintaining the machine.

Investigating the Effectiveness of Recycled Agricultural and Cement Manufacturing Waste Materials Used in Oil Sorption

This research investigates how sorbents made from recycled waste materials affect the properties of water used to remove residues flushed from oil tanks transported by rail. The mineral sorbent was added to water following the flushing process. Water temperatures were maintained at 21 °C and 70 °C for a contact period of 30 min. The experiments demonstrated that: when the sorbent is active, turbidity removal efficiency was about 64%; color removal efficiency of 56% was obtained; and total iron concentration removal was approximately 68%. The effect of the characteristics of the materials on the adsorption capacity was evaluated using the removed amount of oil per one gram of every sorbent. It was found that straw sorbent oil adsorption capacity was up to 33 mg/g, peat sorbent 37 mg/g, and mineral sorbent 1.83 mg/g. The following were also measured during the experiment: temperature, pH, chemical oxygen usage, total iron concentrations, suspended matter, and oil concentrations. The findings show that recycled sorbents obtained from waste materials are environmentally sustainable and can be reused to treat water that has been used to flush oil transported in rail tanks.

A Review of How the Characteristics of Concrete is Altered when Fly Ash is used as a Partial Replacement for Cement

Cement is one of the most widely used building materials on the planet. Cement manufacturing has also increased carbon emissions to their greatest level in recent years. Alternative or low-emissions binders have become more popular as a partial cement substitute in recent years. Because of its huge yearly output as waste material and low cost, fly ash is now regarded as one of the most accessible choices. Fly ash-based construction materials have a lot of promise as cement substitutes because of their high performance and inexpensive cost. The purpose of this article is to look at how fly ash affects the workability, setting time, compressive strength, and tensile strength of concrete. The kinds and characteristics of fly ash were also investigated.

Producing Green Concrete with Plastic Waste and Nano Silica Sand

Industrial and urban development has resulted in the spread of plastic waste and the increase in the emissions of carbon dioxide resulting from the cement manufacturing process. The current research aims to produce green (environmentally friendly) concrete by using plastic waste as coarse aggregates in different proportions (10% and 20%) and nano silica sand powder as an alternative to cement in different proportions (5% and 10% by weight). The results showed that compressive strength decreased by 12.10% and 19.23% for 10% and 20% plastic waste replacement and increased by 12.89% and 20.39% for 5% and 10% silica sand replacement respectively at 28 days. Flexural strength decreased by 12.95% and 19.64% for 10% and 20% plastic waste replacement and increased by 11.16% and 19.86% for 5% and 10% silica sand replacement. Splitting tensile strength decreased by 12.74% and 20.22% for 10% and 20% plastic waste replacement and increased by 10.86% and 19.66% for 5% and 10% silica sand replacement. Dry density decreased by 4.51% and 7.83% for 10% and 20% plastic waste replacement and increased by 2.78% and 4.10% for 5% and 10% silica sand replacement respectively at 28 days.

The Impact of Cash Flow Management Practices on Financial Performance of Cement Manufacturing Firms: A Comparative Study of Pakistan and India

Purpose: The study examined the impact of cash flow management practices on Pakistani cement firm’s financial performance with comparison of Indian cement sector’s selected firms. Methodology: The Pooled OLS Regression is applied with the Help of EViews software. The data collection is from official websites of the concerned companies from 2009 to 2018 with help of secondary source. The multiple regressions, Random Effect Model and Fixed effect models are used for the analysis of data and confirmed with Husman test. Findings: The finding of this study for both selected countries indicated the influence of cash flow management practices wherein both countries cement producing companies shows significant impact on firm’s performance but in terms of Pakistan Return on Assets have no impact on firm’s Profitability. Implications: Therefore, after a careful analysis study recommended that cement manufacturing companies must reevaluate their practices of managing cash flows in order to generate more profitability and generate enough cash to meet their obligations.

The Effects of Carbon Dioxide Concentration on Residents in the Area of a Cement Plant in Perak, Malaysia

Nowadays, concrete is used extensively in construction. The cement factory must generate massive amounts of cement each year in order to deliver enough concrete. Carbon dioxide emitted during the cement manufacturing and raw materials transportation processes contributes to air pollution and greenhouse gas emissions, deteriorating air and water quality and posing health risks to residents. Hence, the purpose of this research is to investigate the effects of carbon dioxide absorption on local residents and their buildings. Therefore, the objectives of this paper are to determine the influence of carbon dioxide absorption on local residents’ health as well as the consequences on structures. A total of 375 questionnaires were distributed throughout the Perak cities of Kampar, Malim Nawar, and Kota Bharu. This research were conducted in Malaysia in 2019. It was decided to adopt convenience sampling. This paper’s findings are separated into two (2) sections: effects on local residents’ health, structures, and environment. According to the Pearson Correlation data, there are several dead cases, as well as locals suffering from cancer and other respiratory problems. The concrete, timber, and metal frames, as well as other faults on the door and windows, have all deteriorated significantly. To preserve human health and the environment, the government should tighten the rule on pollution discharge compliance, and all plant owners should be accountable for building a buffer zone and installing industrial air filters surrounding their factories.