High-strength mass concrete and preparation method thereof

The invention discloses high-strength mass concrete. Each cubic meter of concrete comprises 300-400kg of cement, 50-60kg of iron powder, 30-50kg of fly ash, 800-850kg of sand, 1000-1100kg of broken stone, 160-175kg of water, 2-4kg of a polycarboxylate superplasticizer, 4-8kg of chitosan oligosaccharide and 2-5kg of sodium alginate. The invention discloses a preparation method of the high-strengthmass concrete. The preparation method comprises the following steps of: firstly, putting a polycarboxylate superplasticizer, sodium alginate and chitosan oligosaccharide into water to obtain a mixtureI; adding cement, fly ash, sand and gravel into water to obtain a mixture II; adding the mixture I into the mixture II to form a mixture III, and adding iron powder to obtain a concrete mixture; andpouring the concrete mixture to form a concrete structure. The prepared concrete structure is high in strength, large in size, long in setting time and compact and uniform in product. 本发明公开了高强度大体积混凝土，每立方米混凝土中包括：水泥300～400kg，铁粉50