The invention provides compound
sulfate cement which is characterized in that
slag, plaster,
aluminosilicate waste residues and
cement clinker are taken as basic materials, and one kind of or various kinds of
lime, limestone,
alunite and
zeolite are taken as auxiliary materials. The compound
sulfate cement comprises the following components in parts by weight: 40 to 80 parts of
slag, 5 to 20 parts of plaster, 10 to 30 parts of
aluminosilicate waste residues, 3 to 8 parts of cement
linker and 0 to 10 parts of auxiliary materials. The invention has the characteristics of high strength, low heat and no shrinkage or micro-expansion and is specifically suitable for the construction of
mass concrete, such as large dams,
cushion caps, concrete road surfaces,
marine engineering, and the like. The cement has no dissociative
calcium hydroxide, has excellent
sulfate corrosion resistance performance, can fundamentally solve alkali-aggregate reaction due to extremely lower
alkalinity, has important meaning for the durability of the construction of highway and railway across
saline and alkaline land, and has good impermeability, and the strength and the impermeability of the cement in
seawater can be continuously enhanced. Moreover, the
corrosion of steel bars can be effectively resisted due to Fridel salt formed by the reaction of aluminum
oxide in the
slag and
chloride ions.