Use of pumice in lightweight concrete

Oct 13, 2025 by wbrum.org 144 views

Analysis of Comparison of Specific Gravity and Compressive Strength between Mild Concrete and Normal Concrete with the Quality of K-200 Concrete (Experimental Study)

Introduction

In the world of construction, the use of lightweight concrete has become increasingly important due to its mild characteristics, which can reduce the burden of structure and make supporting components such as foundations more efficient. Lightweight concrete, which weighs between 800 kg/m³ to 2000 kg/m³, is an alternative to traditional concrete that offers several benefits, including reduced weight, improved durability, and increased flexibility. In this study, we aim to analyze the comparison of specific gravity and compressive strength between mild concrete and normal concrete with the quality of K-200 concrete, using pumice as a substitute for gravel.

The Use of Pumice in Light Concrete

Pumice, also known as Aristo stone, is a lightweight material that is effective for producing concrete with low specific gravity. Its use in concrete mixture not only provides benefits in terms of weight, but also contributes to mechanical characteristics. By using pumice, this study aims to analyze changes in compressive strength and specific gravity of concrete during the curing process. Pumice is a natural volcanic glass that is highly porous and has a low density, making it an ideal substitute for gravel in lightweight concrete.

Testing and Analysis Results

The results of this study showed that the use of pumice can convert normal concrete into mild concrete. However, it should be noted that there is a significant decrease in the compressive strength of concrete. The test results showed a decrease in compressive strength of 32.93% at the age of 7 days, 55.79% at the age of 14 days, and 55.92% at the age of 21 days when compared to normal concrete. When compared with the planned quality (K-200), there was a decrease of 13.84%, 44.32%, and 47.94% respectively. This significant decrease in compressive strength is a concern, as it may affect the structural integrity of the concrete.

For specific gravity, the results show a consistent decline, which is 24.47% at the age of 7 days, 21.75% at the age of 14 days, and 20.58% at the age of 21 days. This degree of gravity is in line with a decrease in compressive strength, which shows that the replacement of gravel with pumice affects not only structural loads but also material strength. Specific gravity is a measure of the density of a material, and in this study, it was found to be significantly lower in mild concrete compared to normal concrete.

Conclusion

From the results of this study, it can be concluded that the use of pumice as a substitute for gravel in making mild concrete has a significant effect on specific gravity and compressive strength. Although it produces lighter concrete, a fairly large pressure decrease is a concern. Therefore, the use of lightweight concrete is more suitable for structural applications that do not require high strength, such as decorative elements or wall panels. This study provides new insights in the development of building materials that are more efficient and cost-effective, while still paying attention to the mechanical properties needed in construction applications.

Recommendations

Based on the results of this study, the following recommendations can be made:

Use of pumice in lightweight concrete: Pumice can be used as a substitute for gravel in making lightweight concrete, but it is essential to consider the significant decrease in compressive strength.
Structural applications: Lightweight concrete is more suitable for structural applications that do not require high strength, such as decorative elements or wall panels.
Further research: Further research is needed to develop new building materials that are more efficient and cost-effective, while still paying attention to the mechanical properties needed in construction applications.

Limitations

This study has several limitations, including:

Small sample size: The sample size of this study was small, which may affect the reliability of the results.
Limited testing: The testing was limited to three ages (7, 14, and 21 days), which may not be representative of the long-term behavior of the concrete.
Pumice quality: The quality of the pumice used in this study may affect the results, and further research is needed to determine the optimal quality of pumice for use in lightweight concrete.

Future Directions

This study provides a foundation for further research in the development of lightweight concrete. Future directions include:

Development of new building materials: Further research is needed to develop new building materials that are more efficient and cost-effective, while still paying attention to the mechanical properties needed in construction applications.
Optimization of pumice quality: Further research is needed to determine the optimal quality of pumice for use in lightweight concrete.
Long-term behavior: Further research is needed to determine the long-term behavior of lightweight concrete, including its durability and resistance to degradation.
Frequently Asked Questions (FAQs) about the Analysis of Comparison of Specific Gravity and Compressive Strength between Mild Concrete and Normal Concrete with the Quality of K-200 Concrete (Experimental Study)

Q: What is the main objective of this study?

A: The main objective of this study is to analyze the comparison of specific gravity and compressive strength between mild concrete and normal concrete with the quality of K-200 concrete, using pumice as a substitute for gravel.

Q: What is pumice and why is it used in this study?

A: Pumice is a lightweight material that is effective for producing concrete with low specific gravity. It is used in this study as a substitute for gravel in making lightweight concrete.

Q: What are the benefits of using pumice in lightweight concrete?

A: The use of pumice in lightweight concrete provides several benefits, including reduced weight, improved durability, and increased flexibility.

Q: What are the limitations of this study?

A: The limitations of this study include a small sample size, limited testing, and the quality of the pumice used.

Q: What are the recommendations of this study?

A: The recommendations of this study include the use of pumice in lightweight concrete, structural applications that do not require high strength, and further research to develop new building materials that are more efficient and cost-effective.

Q: What are the future directions of this study?

A: The future directions of this study include the development of new building materials, optimization of pumice quality, and long-term behavior of lightweight concrete.

Q: What are the implications of this study for the construction industry?

A: The implications of this study for the construction industry include the potential for reduced costs, improved durability, and increased flexibility of lightweight concrete.

Q: What are the potential applications of this study?

A: The potential applications of this study include decorative elements, wall panels, and other structural applications that do not require high strength.

Q: What are the potential risks of using pumice in lightweight concrete?

A: The potential risks of using pumice in lightweight concrete include a significant decrease in compressive strength, which may affect the structural integrity of the concrete.

Q: What are the potential benefits of using pumice in lightweight concrete?

A: The potential benefits of using pumice in lightweight concrete include reduced weight, improved durability, and increased flexibility.

Q: How can the results of this study be applied in practice?

A: The results of this study can be applied in practice by using pumice as a substitute for gravel in making lightweight concrete, and by considering the significant decrease in compressive strength.

Q: What are the potential future research directions of this study?

A: The potential future research directions of this study include the development of new building materials, optimization of pumice quality, and long-term behavior of lightweight concrete.

Q: What are the potential implications of this study for the environment?

A: The potential implications of this study for the environment include reduced energy consumption, reduced greenhouse gas emissions, and improved sustainability of lightweight concrete.

Q: What are the potential implications of this study for the economy?

A: The potential implications of this study for the economy include reduced costs, improved efficiency, and increased competitiveness of lightweight concrete.