The Importance of Workability in Concrete

Oct 13, 2025 by wbrum.org 41 views

The Importance of Workability in Concrete

In the world of construction, concrete is one of the most widely used materials. However, along with the mixing process, fresh concrete will lose its original mobility, making it essential to pay attention to the time of stirring and the factors that influence workability or concrete work capabilities. Workability refers to the ease of processing and forming concrete mixtures, and the time between mixing and casting has a significant impact on workability. The longer the stirring time, the higher the possibility of slump loss, which is the loss of slump value or concrete mobility. There are several factors that can affect the loss of workability, including the time, temperature, and mode of concrete transportation.

To maintain optimal concrete quality, the use of added materials such as Plastiment®-VZ can be an effective alternative. Plastiment®-VZ functions as a retarder and water reducer, which can extend the working time of concrete and reduce water needs in the mixture. This makes it an attractive solution for construction projects where concrete is used extensively. By optimizing the stirring time and using additives like Plastiment®-VZ, construction professionals can achieve better workability and improve the overall quality of the concrete.

Method of Using Plastiment®-VZ

In this study, concrete was stirred for 180 minutes continuously with the addition of Plastiment®-VZ in varying proportions, namely 0.2%, 0.4%, and 0.6% of cement weight. The purpose of this variation is to find optimal proportions in improving concrete quality, including compressive strength and elasticity, while reducing slump loss. The testing was carried out using several methods, such as slump tests, penetrometer tests, and compressive strength testing and elasticity.

The results of the study showed that the addition of Plastiment®-VZ has a significant effect on the drying time and concrete strength. The use of Plastiment®-VZ can extend the working time of concrete, making it easier to process and form. This is particularly important in large-scale construction projects where concrete is used extensively. By optimizing the stirring time and using additives like Plastiment®-VZ, construction professionals can achieve better workability and improve the overall quality of the concrete.

Results and Analysis

The results of the study showed that the initial sett time in normal concrete (BN) for 50 minutes, BP02 (with 0.2% Plastiment®-VZ) for 150 minutes, BP04 (with 0.4%) for 180 minutes, and BP06 (with 0.6%) for 300 minutes. The final time sett also shows the same pattern, where the longest time is found in variations of 0.6%. This shows that Plastiment®-VZ is effective in extending concrete processing time.

Concrete compressive strength has increased significantly with the addition of Plastiment®-VZ, which is 2.8% for variations of 0.2%, 4.5% for variations of 0.4%, and 5.1% for variations of 0.6% compared with normal concrete. The maximum compressive strength is recorded at a variation of 0.6%, which shows that the proportion gives the best results. In addition, stirring time optimization can be achieved in the 90th minute for concrete mixtures that use Plastiment®-VZ.

Conclusion

From this study, it can be concluded that the addition of Plastiment®-VZ is not only able to extend the working time of concrete, but also improves the quality of concrete in terms of compressive strength and elasticity. This is very important to maximize concrete performance in construction applications. Therefore, the use of chemicals such as Plastiment®-VZ is a promising alternative to overcome challenges in concrete processing in the construction industry.

With technological advances and better understanding of materials, the construction industry can achieve more optimal and efficient results in the use of concrete. By optimizing the stirring time and using additives like Plastiment®-VZ, construction professionals can achieve better workability and improve the overall quality of the concrete. This can lead to significant cost savings and improved project outcomes.

Recommendations

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

The use of Plastiment®-VZ can be an effective alternative to overcome challenges in concrete processing in the construction industry.
The optimal proportion of Plastiment®-VZ to be used in concrete mixtures is 0.6% of cement weight.
The stirring time optimization can be achieved in the 90th minute for concrete mixtures that use Plastiment®-VZ.
Further research is needed to investigate the long-term effects of Plastiment®-VZ on concrete properties.

Limitations of the Study

This study has several limitations that should be noted:

The study was conducted in a laboratory setting, and the results may not be representative of real-world construction projects.
The study only investigated the effects of Plastiment®-VZ on concrete properties, and further research is needed to investigate its effects on other aspects of concrete processing.
The study only used a limited number of concrete mixtures, and further research is needed to investigate the effects of Plastiment®-VZ on a wider range of concrete mixtures.

Future Research Directions

Based on the findings of this study, the following future research directions can be identified:

Investigating the long-term effects of Plastiment®-VZ on concrete properties.
Investigating the effects of Plastiment®-VZ on other aspects of concrete processing, such as pumping and placing.
Investigating the effects of Plastiment®-VZ on a wider range of concrete mixtures.

By addressing these limitations and exploring these future research directions, the construction industry can continue to improve the quality and efficiency of concrete processing, leading to significant cost savings and improved project outcomes.

Q: What is Plastiment®-VZ and how does it work?

A: Plastiment®-VZ is a chemical additive used in concrete mixtures to improve workability and reduce water needs. It functions as a retarder and water reducer, allowing for longer working times and improved concrete quality.

Q: What are the benefits of using Plastiment®-VZ in concrete mixtures?

A: The benefits of using Plastiment®-VZ include extended working times, improved workability, reduced water needs, and increased compressive strength. These benefits can lead to improved project outcomes, reduced costs, and increased efficiency in concrete processing.

Q: How does Plastiment®-VZ affect the stirring time of concrete?

A: Plastiment®-VZ can extend the stirring time of concrete, allowing for longer working times and improved workability. The optimal stirring time can be achieved in the 90th minute for concrete mixtures that use Plastiment®-VZ.

Q: What is the optimal proportion of Plastiment®-VZ to be used in concrete mixtures?

A: The optimal proportion of Plastiment®-VZ to be used in concrete mixtures is 0.6% of cement weight. This proportion has been shown to provide the best results in terms of compressive strength and workability.

Q: Can Plastiment®-VZ be used in all types of concrete mixtures?

A: Plastiment®-VZ can be used in a wide range of concrete mixtures, but it is essential to follow the manufacturer's instructions and conduct thorough testing to ensure compatibility and optimal results.

Q: What are the potential limitations of using Plastiment®-VZ in concrete mixtures?

A: The potential limitations of using Plastiment®-VZ include the need for thorough testing to ensure compatibility and optimal results, the potential for increased costs, and the need for proper handling and storage to prevent damage to the additive.

Q: Can Plastiment®-VZ be used in combination with other additives or chemicals?

A: Plastiment®-VZ can be used in combination with other additives or chemicals, but it is essential to follow the manufacturer's instructions and conduct thorough testing to ensure compatibility and optimal results.

Q: What are the potential environmental impacts of using Plastiment®-VZ in concrete mixtures?

A: The potential environmental impacts of using Plastiment®-VZ include the need for proper handling and storage to prevent damage to the additive, the potential for increased energy consumption during production, and the need for careful disposal of waste materials.

Q: Can Plastiment®-VZ be used in high-performance concrete mixtures?

A: Plastiment®-VZ can be used in high-performance concrete mixtures, but it is essential to follow the manufacturer's instructions and conduct thorough testing to ensure compatibility and optimal results.

Q: What are the potential cost savings associated with using Plastiment®-VZ in concrete mixtures?

A: The potential cost savings associated with using Plastiment®-VZ include reduced water needs, improved workability, and increased compressive strength, which can lead to improved project outcomes, reduced costs, and increased efficiency in concrete processing.

Q: Can Plastiment®-VZ be used in combination with other materials or products?

A: Plastiment®-VZ can be used in combination with other materials or products, but it is essential to follow the manufacturer's instructions and conduct thorough testing to ensure compatibility and optimal results.

Q: What are the potential benefits of using Plastiment®-VZ in concrete mixtures for sustainable construction?

A: The potential benefits of using Plastiment®-VZ in concrete mixtures for sustainable construction include reduced water needs, improved workability, and increased compressive strength, which can lead to improved project outcomes, reduced costs, and increased efficiency in concrete processing.

Q: Can Plastiment®-VZ be used in combination with other sustainable materials or products?

A: Plastiment®-VZ can be used in combination with other sustainable materials or products, but it is essential to follow the manufacturer's instructions and conduct thorough testing to ensure compatibility and optimal results.

Q: What are the potential future developments or applications of Plastiment®-VZ in concrete mixtures?

A: The potential future developments or applications of Plastiment®-VZ in concrete mixtures include the use of advanced materials or technologies, the development of new products or formulations, and the expansion of its use in various industries or applications.

Q: Can Plastiment®-VZ be used in combination with other advanced materials or technologies?

A: Plastiment®-VZ can be used in combination with other advanced materials or technologies, but it is essential to follow the manufacturer's instructions and conduct thorough testing to ensure compatibility and optimal results.

Q: What are the potential benefits of using Plastiment®-VZ in concrete mixtures for advanced construction applications?

A: The potential benefits of using Plastiment®-VZ in concrete mixtures for advanced construction applications include improved workability, increased compressive strength, and reduced water needs, which can lead to improved project outcomes, reduced costs, and increased efficiency in concrete processing.

Q: Can Plastiment®-VZ be used in combination with other advanced construction materials or products?

A: Plastiment®-VZ can be used in combination with other advanced construction materials or products, but it is essential to follow the manufacturer's instructions and conduct thorough testing to ensure compatibility and optimal results.