Influence of water curing temperature on some mechanical properties of SCC produced from recycled aggregates

الملخص EN

The utilization of recycled aggregates can minimize environmental impact and slow the huge consumption of natural resources used for concrete applications.

However, recycled aggregates are not suitable for use in the production of High Performance Concrete (HPC) due to their relatively high absorption capacity, unstable properties and recycled aggregates' weaker strength.

Such inadequacies can be overcome through carefully examining the characteristics of recycled aggregates and then adopting proper mixture proportions.

The mechanical properties of self compacting concrete (SCC) are well understood.

But there are no scientific investigations available on the influence of a heat water treatment on the properties of SCC produced from recycle aggregate.

To evaluated the influence on the mechanical properties five mixture were designed, SCC without recycled concrete aggregate and four (SCC with 25 % recycled concrete aggregate SCC with 50 % recycled concrete aggregate, SCC with 75 % recycled concrete aggregate and SCC with 100 % recycled concrete aggregate) and exposed to heat of treatment water with different temperatures (40-100 )Cₒ.

It has been found that there is possible to produce SCC with various percentage of recycled concrete by using a suitable dosage of SP which was a major component in producing good quality RCA (recycled concrete aggregate).

Also found an influence of the composition of the concrete, especially the quantity of recycle aggregate and heat of curing water on mechanical properties of concrete (compressive strength, splitting tensile strength and flexural strength).