The application relates to the technical field of concrete, and discloses high-permeability-resistant recycled micro-
powder concrete and a preparation method thereof. The steps are as follows: 3-(isobutenoyloxy)propyl trimethoxysilane is taken,
ethanol aqueous solution is added, the temperature is increased to 40-60 DEG C, and stirring is carried out for 1-2 hours; nano glass beads are added, and the temperature is continuously kept and stirred for 2-4 hours;
filtration, washing and
drying are carried out, and double-bonded glass beads are obtained; iso-pentenyl
polyoxyethylene ether is taken, water is added, and stirring is carried out until the water is uniformly mixed; an initiator is added, and stirring and
dissolution are carried out, so that a
mixed solution A is obtained;
acrylic acid,
sodium methallyl sulfonate and double-bonded glass beads are taken, water is added, and stirring is carried out until the water is uniformly mixed; the temperature is increased to 60-70 DEG C, the
mixed solution A is added dropwise, the dropwise addition is completed in 2-3 hours, the temperature is increased to 75-80 DEG C, and the temperature is kept for 3-4 hours; the pH value is adjusted to be neutral;
filtration and
drying are carried out, and modified micro-beads are obtained; coarse aggregate, fine aggregate, recycled micro-
powder,
fly ash,
cement, modified micro-beads, an additive and water are mixed, and high-permeability-resistant recycled micro-
powder concrete is obtained.