FIELD: building materials. SUBSTANCE: complex addition has sulfur-containing compound that is a product of treatment of sulfur with lime and has the following ratio of components, wt.-%: sulfur 24-28; lime 8-9, and water 63-68. Complex addition can be used in combination with calcium chloride that provides the improved quality and property of concrete and suspension. EFFECT: increased strength, density, hardiness, improved quality of concrete, decreased cement consumption. 1 tbl, 1 ex
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