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2 Ecological Engineering & Environmental Technology

2 2023

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Experimental Comparison of Normal Plain Concrete and Recycled Aggregate Concrete Addition with Coconut Fiber and Chemrite-530 SP

Rahim Mateen Ur, Ellahi Farman, Atif Afzaal Muhammad, Cheema Shahan M.

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 7

186--195

Concrete is a versatile and widely used construction material that has been in existence for centuries. Waste concrete comes from demolished concrete structures and has appeared as a worldwide challenge in recent years. Rather than disposing of waste concrete in landfills, it can be recycled and used for various purposes to protect natural resources and minimize environmental pollution. Managing waste has become important, because of an increase in the demand for natural resources as well as the amount of waste products produced during construction and demolition, both of which have exerted enormous pressure on the environment. Environmental studies that cover waste material recycling and reuse are becoming increasingly important today. Environmental pollution is thought to be best solved by using waste that was collected from demolished buildings, or natural resources, cleaned, and then reduced to aggregate form. Construction expenses are rising today, and the gradual influence on the environment has driven researchers to accept natural fibers, such as coconut fiber, for reinforcing concrete. Normal plain concrete cubes, cylinders, as well as coconut fiber cubes and cylinders were prepared. Coconut fibers are used at different ratios. A very small amount of admixtures called super-plasticizers is added to the concrete mix. As a result of their addition, the mixture becomes significantly more workable, and the water/cement ratio or even the amount of cement is lowered. Their performance is determined by the type of super-plasticizer SP used, the composition of the concrete mixture, the time of addition, and the temperature conditions at the time of mixing and concreting. The primary goal of the research study was to compare the characteristics of recycled concrete aggregate, RCA combined with natural Coconut fiber CF and SP Super plasticizer Chemrite-530 to those of Normal Plain Concrete under Compressive-Strength and Splitting-Tensile strength.

Analysis of the Chemical Compositions of Locally Branded Manufactured Cement of Pakistan

Sultan Muhammad Adil, Jawad Muhammad, Din Salah Ud, Cheema Shahan M., Mushtaq Aamir

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 3

147--152

Cement is a key component of concrete; its qualities impact the properties of concrete created using a particular type of cement. In Pakistan, cement brands are used for an enormous amount. As a result, the cement qualities must fulfill the standards defined by the rules. This research compares the chemical properties of Paidaar, Lucky, DG, Fauji, and Bestway cement brands. This research compares the chemical properties of Paidaar, Lucky, DG, Fauji, and Bestway cement brands. The chemical analysis of cement was used to compute the compound composition of C3S, C2S, C3A, and C4AF. It was discovered that the Al2O3 and SO3 levels in Paidaar and Fauji cement exceeded the specified limits. The presence of more SO3 causes sulphates in cement to expand. Furthermore, a study of four key components (C3S, C2S, C3A, and C4AF) revealed that Paidaar, Lucky, and Fauji cement have less C3S and more C2S, as a result, when compared to other cement brands, it has the lowest strength. When different brands’ chemical compositions were compared, the Paidaar, Lucky, DG, Fauji, and Bestway cements fulfilled the standards’ recommended ranges. To ensure the quality specified by the standards, Paidaar, Lucky, and Fauji cement require significant quality control during the manufacturing process.