The content of fly ash is generally determined according to the performance index of concrete and the use environment, usually between 10% and 30%.
Too much or too little fly ash can adversely affect the performance of concrete. If the content is too small, it may not be able to give full play to the advantages of fly ash, and the performance improvement effect of concrete is limitedIf the dosage is too large, it may lead to problems such as the decline of the working performance of the concrete, the increase of shrinkage, and the reduction of strength.
Therefore, when determining the content of fly ash, comprehensive consideration and scientific experiments are required. Specifically, according to the engineering requirements and the performance indicators of concrete, the appropriate fly ash grade and performance index can be selected, and the mix ratio design and trial matching can be carried out to determine the best fly ash content. At the same time, the cost of fly ash and its impact on the cost of concrete also need to be considered to achieve an economical and reasonable fly ash application.
In addition, it is also necessary to pay attention to the quality control and management of transportation and storage of fly ash to ensure the stability of its quality and performance. In the construction process, it is also necessary to strengthen the management of concrete mixing, transportation, pouring and curing to ensure the quality and durability of concrete.
To sum up, the amount of fly ash needs to be determined according to the specific situation, and comprehensive consideration and scientific experiments should be carried out. When determining the amount of fly ash, it is necessary to comprehensively consider multiple factors such as engineering requirements, concrete performance indicators, fly ash performance indicators, mix ratio design, and cost to achieve economic and reasonable fly ash application. At the same time, it is also necessary to strengthen the management and control of the construction process to ensure the quality and durability of concrete.