Anti-crack concrete for construction of super-long structure and preparation method of anti-crack concrete

The invention discloses anti-crack concrete for construction of an ultra-long structure. The anti-crack concrete is prepared from the following components in parts by weight: 297 to 305 parts of cement, 108 to 115 parts of fly ash, 730 to 735 parts of sand, 1010 to 1020 parts of stone, 10 to 12 parts of water reducing agent, 158 to 160 parts of water, 1 to 2 parts of graft modified bamboo pulp fiber and 27 to 29 parts of expanding agent. According to the invention, the shrinkage cracking problem of the concrete can be effectively reduced, the construction requirements of super-long-structure anti-crack concrete are met, and the concrete is suitable for special climates such as Xinjiang regions; and the related preparation method is relatively simple, relatively low in cost and suitable for popularization and application. 本发明公开了一种超长结构施工抗裂混凝土，各组分及其所占重量份数包括：水泥297～305份，粉煤灰108～115份，砂730～735份，石1010～1020份，减水剂10～12份，水158～160份，接枝改性竹浆纤维1～2份，膨胀剂27～29份。本发明可有效降低混凝土的收缩开裂问题，满足超长结构抗裂混凝土的施工要求，适用于新疆地区等特殊气候；且涉及的制备方法较简单、成本较低，适合推