Plastic and free shrinkages cracking of blended white cement concrete

الملخص EN

The objective of the present research work is to determine experimentally the effect of partially substituted of concrete made of white Portland cement with pozzolanic admixtures such as, met kaolin, MK, or silica fume, SF up to 15 % by cement weight on the plastic shrinkage cracking and free shrinkage.

Also, plastic shrinkage cracking and free shrinkage for concrete made of regular plain gray Portland cement were determined as a reference.

The experimental results showed that, plain white Portland cement concrete showed less number of plastic cracks but higher average crack width compared to other concrete mixtures with MK or SF.

It has been found that, plain concrete with gray Portland cement matrix showed higher number of plastic cracks than plain white Portland cement matrix.

Also the results indicated that, free shrinkage of concrete modified with MK or SF was higher compared to plain white cement matrix and free shrinkage behavior of plain white cement as well as gray cement matrix was comparable.