Large-volume self-compacting concrete

The invention relates to the field of concrete, and particularly discloses large-volume self-compacting concrete. The large-volume self-compacting concrete is prepared from the following components in parts by weight: 320 to 420 parts of cement, 90 to 140 parts of fly ash, 90 to 120 parts of mineral powder, 10 to 50 parts of silica fume, 720 to 760 parts of river sand, 900 to 1000 parts of gravel, 140 to 160 parts of water, 10 to 15 parts of a water reducing agent and 80 to 140 parts of modified expanded clay. The mass self-compacting concrete provided by the invention has the advantage of good fluidity. 本申请涉及混凝土领域，具体公开了一种大体积自密实混凝土。大体积自密实混凝土包括重量份水泥320-420份、粉煤灰90-140份、矿粉90-120份、硅灰10-50份、河砂720-760份、碎石900-1000份、水140-160份、减水剂10-15份和改性膨胀黏土80-140份。本申请的大体积自密实混凝土具有流动性好优点。