The application discloses a preparation method of low-shrinkage low-heat low-carbon concrete, and has the technical characteristics that high-water-absorption autoclaved
silicate functional aggregate is used to replace gravel and yellow sand, and the
mass sum of
fly ash and mineral
powder in the cementing material can be up to 60% at most. The high-water-absorption water-saturated autoclaved
silicate functional aggregate and the expanding agent are added into the concrete, the
humidity is released through the functional aggregate, the internal curing and the expansion of the expanding agent are cooperated, the self-shrinkage, the
drying shrinkage and the hydration heat shrinkage of the concrete are reduced, and the strength of the concrete is improved; the grading of the fine aggregate of the superfine yellow sand is improved through the addition of the fine functional aggregate, the working performance of the concrete is improved, and the low-carbon
environmental protection of the concrete is realized through the large amount of mineral admixtures.