Mechanical performance of quarry dust fine powder (QDFP)‎ bricks

الملخص EN

Cement production is widely increasing as it involved in most of the construction projects.

Cement production also create problem to the environmental regarding to CO2 emissions, dust pollution, and noise during blasting process for getting new the raw materials.

Currently, many studies have been conducted on the application of quarry dust as a partial replacement of sand.

Nevertheless, the utilization of quarry dust in the practice of quarry dust fine powder (QDFP) as a partial replacement of cement in brick still limited.

Therefore, this study concentrated on the mechanical performance in terms of compressive strength of bricks made of OPC and QDFP bricks with 0.5 water cement ratio (w/c).

The mix designed for (60) samples of bricks and tested after 28 and 60 days of air-dried curing.

There were six (6) batches of which vary in QDFP replacement of cement content.

The replacement percentage ranges between values of 0%, 15%, 20%, 25%, 30%, and 40%.

Each percentage has ten (10) samples.

The size of bricks cube is 215mm x 100mm x 65mm.

The mixture containing cement-sand ratios of 1:3 was adopted.

The results confirmed that, the percentage of compressive strength for QDFP bricks decreased with increasing the replacement percentage of cement with QDFP.

In addition it was found that, the optimum replacement of QDFP is at 40% replacement of cement made of mix proportion of 1:3.0 of cement sand ratio, which the compressive strength was 28.37 N/mm2 and 37.65 N/mm2 in 28 and 60 days of age respectively