本发明涉及功能建筑材料技术领域，公开了一种装配式建筑用轻量化增强混凝土及制备方法。所述轻量化增强混凝土包括按重量份计的原料组分为：P.O 42.5普通硅酸盐水泥320‑340份、P.O 52.5普通硅酸盐水泥100‑120份、粉煤灰30‑50份、硅灰20‑30份、偏高岭土5‑10份、细骨料200‑220份、粉煤灰漂珠50‑100份、改性轻质粗骨料600‑700份、聚羧酸高效减水剂5‑7份、增强纤维15‑20份、水145‑160份；所述改性轻质粗骨料表面为两层改性界面，包含具有弹性功能的第一界面和具有密实性的第二界面，有效防止用于混凝土被压裂；通过硅酸盐水泥粒径级配调控和掺合料配合，形成更坚固的水化产物，自密实性较佳，从而增强混凝土的抗压、抗折性能；使混凝土早期强度提升，缩短装配式建筑预制混凝土构件的拆模周期。

The invention relates to the technical field of functional building materials, and discloses lightweight reinforced concrete for fabricated buildings and a preparation method. The lightweight reinforced concrete is prepared from the following raw material components in parts by weight: 320 to 340 parts of P.O 42.5 ordinary Portland cement, 100 to 120 parts of P.O 52.5 ordinary Portland cement, 30 to 50 parts of fly ash, 20 to 30 parts of silica fume, 5 to 10 parts of metakaolin, 200 to 220 parts of fine aggregate, 50 to 100 parts of fly ash floating beads, 600 to 700 parts of modified lightweight coarse aggregate, 5 to 7 parts of polycarboxylate superplasticizer, 15 to 20 parts of reinforced fiber and 145 to 160 parts of water. The surface of the modified light coarse aggregate is a two-layer modified interface, and comprises a first interface with an elastic function and a second interface with compactness, so that concrete is effectively prevented from being fractured; a firmer hydration product is formed by regulating and controlling the particle size grading of the Portland cement and matching the admixture, and the self-compaction property is better, so that the compression resistance and fracture resistance of the concrete are enhanced; the early strength of the concrete is improved, and the form removal period of the prefabricated building precast concrete member is shortened.