Browsing by Author "Kamal, Sadia"

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A Comparative Study on M15 and M20 Concrete Strength Variation Using Hand Mixing and Machine Mixing Method
(Daffodil International University, 22-12-22) Islam, Daudul; Hassan, Arif; Kamal, Sadia; Shekh, Md. Nuralam
Concrete is one of the oldest and most widely used building materials in the world, mostly because it is inexpensive, readily available, has a long lifespan, and can withstand harsh weather conditions. There are many ways to produce concrete in this modern day like Ready mixing, Machine mixing and Hand mixing concrete. The primary goals of this experiment are to determine the most cost-effective concrete and to compare the effects of hand mixing and machine mixing on the compressive and split tensile strengths of concrete.In the current experimental study, concrete mixes with proportions M15 and M20 were used. A total of 72 cylinders, 4 inches in diameter and 8 inches high, were cast and tested experimentally. These cylinders were used to measure the compressive strength and tensile strength of concrete after 7, 14 and 28 days. Samples were removed from the curing tank just prior to testing. A compression test was performed using a compression tester (UTM). We found the maximum compressive strength is 2442 psi for M20 and 2151 psi for M15 concrete by using Machine mix procedure. The value of Hand mix concrete is 1619 psi for M20 and 1431 psi for M15 grade concrete. Again, in the split tensile strength test we get better value for Machine mix rather than Hand mix concrete. So, it is clear that the Machine mixing concrete is more effective than Hand mixing concrete for any types of constructions. Keyword: Hand mixing, Machine mixing, Compressive strength, Split tensile strength, Economical cost.
Consumer behavior on bottled mineral water
(BRAC University, 9/15/2016) Kamal, Sadia; Islam, Md. Tamzidul
Water by itself may appear to be an undifferentiated good to many. As water is a necessity just like Oxygen. However, when it comes to packaged and processed bottled mineral water, it creates a demand backed up my monetary value. The consumers mind most often cycles around the factors such as taste, preferences and opinions before purchasing a bottled mineral water. Hence, this report is a study on the consumer behavior towards the numerous available bottled mineral water at the consumer’s disposal. Water being water might seem of the same weight and importance to all, however this report investigates deeper into understanding why some bottled mineral water brands are performing better than the others. A friendly survey has been conducted on thirty respondents to determine the perceptions of bottled mineral water from different angles and based on multiple attributes via a method called perceptual mapping. The factors or attributes evaluated on were Taste, Packaging, Advertisement, Distribution, Price, Brand Image and Overall Rank. Following the survey, the findings were compiled down to an average to easily interpret where the brands in subject (MUM, AQUAFINA and SPA) stand today. Pointing where the improvement areas are and tracing where the strength lies. The perceptual mapping findings led to conclusions such as Brand USP, reasons of success, reasons of failure and future recommendations.
Ladies football gusto
(Dhaka Tribune, 2015-11-01) Kamal, Sadia