Effect of melted clay brick powder (MCBP)‎ on compressive strength and drying shrinkage cracks of cement mortar

Abstract EN

This investigation is conducted to study the effect of addition of melted Brick clay powder (MCBP) on drying shrinkage cracks and compressive strength of cement mortar.

Steel moulds having a trapezoidal section, and the end restrained at square shape used to study restrained drying shrinkage of cement mortar.

Specimens of compressive strength, density, were cast.

The admixture (MCBP) was used with three levels of (2 %, 4 %, and 8 %) by weight of cement.

All specimens were cured 7 days.

The experimental results illustrate that the adding of this admixture cause a delay in a formation of cracks producted from a drying shrinkage, increase compressive strength at levels of (2 %) and (4 %).

of admixture, and decrease the density.

The increment of compressive strength at level (2 %) was about (4.28 %), but at level of (8 %) it was decreased about of (2.62 %).

The admixture has the clear opposite effect in delay of the information of shrinkage cracks and decrease of numbers.