Huite takes you to learn about recycled aggregates in concrete mixing plants

At present, with the rapid development of the national economy, the demand for concrete mixing plants is increasing year by year, and the amount of concrete produced is also constantly increasing. At this time, a large amount of waste concrete will be produced. Therefore, it is particularly important to understand the recycled aggregates in concrete mixing plants!

The main characteristics of recycled aggregates are:

The bulk density of recycled aggregates should be significantly lower than that of pure natural aggregates.

Compared to pure natural aggregates, recycled aggregates have a lower apparent density and higher positional ratio.

3. Recycled aggregates not only have the characteristic of high water absorption, but also have a relatively fast moisture absorption speed. The water absorption capacity of recycled aggregates expands with the decrease of aggregate particle size.

Regarding compression resistance, the adhesion of recycled aggregate to mortar is fragile and prone to breakage, and it can easily detach from the recycled aggregate under external forces. Therefore, the crushing policy of recycled aggregate is significantly larger than that of natural aggregate, and the compressive strength and elastic modulus of recycled aggregate are significantly different from those of natural aggregate. Moreover, the shortening rate of recycled concrete mixed with recycled aggregates is significantly higher than that of concrete mixed with natural aggregates.

In summary, when using recycled aggregates in engineering project internships, we must accurately measure these main parameters in advance, and based on the obtained variable values, determine the cooperation ratio of the new mixture according to the internship situation. There are two ways to obtain recycled aggregates. The first way is to obtain recycled aggregates through crushing and grading; The second approach is to calcine to obtain recycled aggregates. The completion process of the former may be relatively simple, while the latter requires more comprehensive planning.

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