Influence of Recycled Cement Paste Powder on Early-Age Plastic Shrinkage and Cracking of Cement-Based Materials

Cement-based materials, especially those with low water-cement ratios, often experience premature cracking due to plastic shrinkage in the early curing stages. In this study, development mechanism of early-age cement paste, and crack control effect recycled paste powder on was quantitatively investigated using non-contacting two-dimensional digital image technology. The influence different replacement rates (5%, 10%, 20% 30%) major principal strain patterns investigated. Furthermore, cement-based materials explored. results show that addition could suppress paste. An appropriate ratio (10%) shows a 33.3% time delay appearance 28.0% reduction strain. However, higher 30% an adverse strain, increase 35.1%. core lies its porous nature, which allows for water absorption release regulates moisture state inside pores. This quantitative research can facilitate better understanding