Enhancing the Strength Properties of Recycled Aggregate Concrete through the Use of Supplimentary Cementing Materials
Abstract
Enhancing The Strength Properties Of Recycled Aggregate Concrete Through The Use Of Supplimentary Cementing Materials Recycled aggregates are derived from crushing demolished concrete. They comprise of crushed, graded inorganic particles processed from the materials that have been used in the construction and demolition debris. The aim for this project is to determine the strength characteristic of recycled aggregates and the effect of natural admixtures on recycled aggregate concrete, which will give a better understanding on the properties of concrete with recycled aggregates, as an alternative material to coarse aggregate in structural concrete. The scope of this project is to determine and compare the strength of concrete by using different percentage of recycled aggregates with different types of admixtures for different purposes.
Conclusion
The following conclusions are applicable to the materials used, test method adopted and the range of parameters studied.
- From the Workability test results it is observed that the slump and compaction factor of SFRAC, goes on decreasing, as the percentage replacement of natural aggregates by recycled aggregates goes on increasing. This may be due to fact that recycled aggregate may absorb more water because of more porous structure of recycled aggregate. Conclusion may be made that the workability of recycled aggregate concrete goes decreases as the percentage replacement of natural aggregates by recycled aggregates goes on increasing. Comparing the results it is observed that the workability of in more.
- From the Compressive strength test results it is observed that the compressive strength for all the three supplementary cementitious concretes, SFRAC increases, between 10% to 30% replacement of natural aggregate by recycled aggregate but the strength decreases for further increase in recycled aggregate percentage.
