ad.现浇段砼石子粒径不大于2cm,混凝土强度宜比预制梁板高5Mpa,混凝土按设计和规范要求掺高效减水剂和微膨胀剂。 The d. cast-in-place section tong gravel particle size is not bigger than 2cm, the concrete intensity suitably compared to prefabricates Liang Bangao 5Mpa, the concrete mixes the highly eff...