@Article{jrm.2023.027592,
AUTHOR = {Ruyi Luo, Yanyan Hu, Tingshu He, Xiaodong Ma, Yongdong Xu},
TITLE = {Effect of CSH Crystal Nucleus on Steam-Free Cured Fly Ash Precast Concrete Components},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {11},
YEAR = {2023},
NUMBER = {9},
PAGES = {3485--3500},
URL = {http://www.techscience.com/jrm/v11n9/53585},
ISSN = {2164-6341},
ABSTRACT = {The measures of steam curing and early-strengthening agents to promote the precast components to reach the
target strength quickly can bring different degrees of damage to the concrete. Based on this, the new nanomaterial
CSH-the hydration product of cement effectively solves these measures’ disadvantages, such as excessive energy
consumption, thermal stress damage, and the introduction of external ions. In this paper, the effect of CSH on the
early strength of precast fly ash concrete components was investigated in terms of setting time, workability, and
mechanical properties and analyzed at the microscopic level using hydration temperature, XRD, and SEM. The
results showed that under the same workability, CSH could significantly reduce the amount of admixture, shorten
the final setting time, almost not affect the initial setting time, and accelerate the hydration of cement. At the
optimum dose of 5%, the mechanical properties of the specimens were improved by more than 98% within
12 h of hydration, resulting in an earlier release time of 12 h and no risk of strength inversion later. The results
of this paper give theoretical support to the behavior of precast components under steam-free curing.},
DOI = {10.32604/jrm.2023.027592}
}