Dual-scale toughened cement-based composite material and use thereof

A dual-scale toughened cement-based composite material, comprising:

• a cementitious material, a monomer, an initiator, a crosslinking agent, and fibers;
• wherein the monomer is an acrylamide monomer;
• the fibers comprise steel fibers or a mixture of steel fibers and synthetic fibers, the synthetic fibers comprising one or more selected from the group consisting of polyvinyl alcohol fibers, polypropylene fibers, glass fibers, and carbon fibers, and the steel fibers each having a diameter of 300-1200 μm and a length of 20-120 mm and the synthetic fibers each having a diameter of 40-100 μm and a length of 3-40 mm;
• and
• a mass ratio of the monomer to the crosslinking agent is in a range of 100:(0.67-5).