The Effect Of The Use Of Moderate Volume Fly Ash And Rice Husk Ash On The Tensile Strength Of Fiber Reinforced Engineered Cementitious Composites
The Effect of the Use of Moderate Volume Fly Ash and Rice Husk Ash on Tensile Strength Fiber Reinforced Engineered Cementitious Composites
Introduction
The world is facing a significant environmental crisis, with waste management being one of the most pressing issues. In Indonesia, a country with abundant agricultural production and one of the largest coal producers in the world, the problem of waste management has become increasingly relevant. Rice husk waste and fly ash are two types of waste that are widely produced but are often less utilized. Research on the use of these two waste is important to find solutions to the environmental impact. This study aims to examine the effect of the use of rice husk ash (RHA) and fly ash (FA) on the tensile strength of fiber reinforced engineered cementitious composites (FR-ECC).
Background
Fiber reinforced engineered cementitious composites (FR-ECC) are a type of high-performance concrete that is designed to have excellent tensile strength and durability. The use of FR-ECC in construction can reduce the environmental impact of building materials and provide a sustainable solution for the construction industry. However, the production of FR-ECC requires a significant amount of energy and resources, which can contribute to environmental degradation. The use of waste materials such as rice husk ash and fly ash can provide a sustainable solution for the production of FR-ECC.
Materials and Methods
In this study, the effect of the use of rice husk ash (RHA) and fly ash (FA) on the tensile strength of FR-ECC was examined. The research process involved the manufacture of 72 cylinder samples measuring 10 cm in diameter and height of 20 cm with a variety of mixture of rice husk ash and fly ash. Mixed variations consist of fa0-rha0, fa0-rha10, fa25-rha0, fa25-rha10, fa35-rha0, and fa35-rha10. In addition, each variation contains 4 variations of polypropylene fiber (PP Fiber) with a percentage of 0%, 0.1%, 0.2%, and 0.3%. Each combination produces 3 samples, which are then soaked for 22 days before being tested on the 28th day using a compressive test machine to determine the tensile strength.
Results
The test results show that the variation of the FA35-RHA10 mixture with an additional 0.2% PP Fiber produces the optimum tensile strength value. The value is 7.58 MPa, while for the FA0-RHA0 variation in the same PP fiber only reaches 5.10 MPa. Thus, there is a significant increase in the tensile strength, which is 48.6% in the variation of the FA35-RHA10 mixture compared to the FA0-RHA0.
Discussion
Higher tensile strength in the FA35-RHA10 variation can be explained by the synergy between fly ash and rice husk ash. Fly Ash functions as a good binder because it contains high silica which can increase pozzolanic reactions in concrete mixtures. Meanwhile, rice husk ash serves to reduce weight and improve mixed mechanical performance. The addition of PP Fiber also contributes to strengthening the structure of the concrete matrix, especially in reducing cracks and increasing resistance to loads.
Conclusion
This significant increase in the percentage of tensile strength shows that the use of waste is not only beneficial for reducing environmental impacts but can also improve the quality of building materials. This advantage is in line with the practice of sustainability in construction, where the use of recycled materials can reduce production costs and ecological impacts of development activities. The application of the use of fly ash and rice husk ash in making concrete is also in line with global trends to reduce the use of non-renewable natural resources.
Recommendations
Through this understanding, it is expected that the use of recycled materials such as Fly Ash and Rice Husk ash can be optimized in the construction industry, as well as making a positive contribution to sustainable development. It is recommended that further research be conducted to explore the potential of using fly ash and rice husk ash in other types of construction materials.
Future Directions
The use of fly ash and rice husk ash in construction can provide a sustainable solution for the production of building materials. However, there are still many challenges that need to be addressed, such as the variability of waste materials and the need for standardization of production processes. Further research is needed to explore the potential of using fly ash and rice husk ash in other types of construction materials and to develop more efficient production processes.
Limitations
This study has several limitations. Firstly, the study only examined the effect of the use of rice husk ash and fly ash on the tensile strength of FR-ECC. Further research is needed to explore the potential of using these waste materials in other types of construction materials. Secondly, the study only used a limited number of samples, which may not be representative of the entire population. Further research is needed to confirm the findings of this study.
Conclusion
In conclusion, this study has shown that the use of moderate volume fly ash and rice husk ash can improve the tensile strength of fiber reinforced engineered cementitious composites. The synergy between fly ash and rice husk ash can provide a sustainable solution for the production of building materials. Further research is needed to explore the potential of using fly ash and rice husk ash in other types of construction materials and to develop more efficient production processes.
Frequently Asked Questions (FAQs) about the Use of Moderate Volume Fly Ash and Rice Husk Ash on Tensile Strength Fiber Reinforced Engineered Cementitious Composites
Q: What are fly ash and rice husk ash?
A: Fly ash and rice husk ash are two types of waste materials that are widely produced but are often less utilized. Fly ash is a by-product of coal combustion, while rice husk ash is a by-product of rice processing.
Q: What is the purpose of using fly ash and rice husk ash in construction?
A: The purpose of using fly ash and rice husk ash in construction is to provide a sustainable solution for the production of building materials. By using these waste materials, we can reduce the environmental impact of construction and provide a more sustainable solution for the construction industry.
Q: How do fly ash and rice husk ash improve the tensile strength of fiber reinforced engineered cementitious composites?
A: Fly ash and rice husk ash can improve the tensile strength of fiber reinforced engineered cementitious composites by providing a synergy between the two materials. Fly ash functions as a good binder because it contains high silica which can increase pozzolanic reactions in concrete mixtures. Meanwhile, rice husk ash serves to reduce weight and improve mixed mechanical performance.
Q: What is the significance of the FA35-RHA10 mixture in this study?
A: The FA35-RHA10 mixture is significant because it produces the optimum tensile strength value of 7.58 MPa. This is a 48.6% increase in tensile strength compared to the FA0-RHA0 variation.
Q: What is the role of polypropylene fiber (PP Fiber) in this study?
A: Polypropylene fiber (PP Fiber) plays a crucial role in this study by contributing to strengthening the structure of the concrete matrix, especially in reducing cracks and increasing resistance to loads.
Q: What are the limitations of this study?
A: The limitations of this study include the use of a limited number of samples, which may not be representative of the entire population. Further research is needed to confirm the findings of this study.
Q: What are the future directions for this research?
A: The future directions for this research include exploring the potential of using fly ash and rice husk ash in other types of construction materials and developing more efficient production processes.
Q: What are the recommendations for the use of fly ash and rice husk ash in construction?
A: The recommendations for the use of fly ash and rice husk ash in construction include further research to explore the potential of using these waste materials in other types of construction materials and developing more efficient production processes.
Q: What are the benefits of using fly ash and rice husk ash in construction?
A: The benefits of using fly ash and rice husk ash in construction include reducing the environmental impact of construction, providing a sustainable solution for the construction industry, and reducing production costs and ecological impacts of development activities.
Q: What are the challenges associated with using fly ash and rice husk ash in construction?
A: The challenges associated with using fly ash and rice husk ash in construction include the variability of waste materials and the need for standardization of production processes.
Q: What is the significance of this study in the context of sustainable development?
A: This study is significant in the context of sustainable development because it provides a sustainable solution for the production of building materials, reduces the environmental impact of construction, and provides a more sustainable solution for the construction industry.