The civil works include a 9 storey office building, a 3 storey office building, and a production kit

Civil engineering should be based on the design drawings required by the strength grade of concrete, masonry strength grade to select the cement number, concrete is generally supplied by commercial concrete companies, according to the requirements of the drawings on the line; If there is no commercial concrete, self-mixed concrete on the construction site, according to the design requirements according to the sand and gravel grading of the construction site, a qualified laboratory should be entrusted to provide a mix ratio (including mortar mix ratio), if you say civil engineering, most of the cement will be used.

Generally, cement can be used. It mainly depends on the design requirements and the ratio provided by the laboratory.

As long as you configure concrete or mortar that meets local building codes, you'll be fine.