| abstract |
(57) [Summary] [Problem] Even when concrete with a large slump is used, A cement admixture and cement composition that can prevent the concrete from dripping and falling off the slope immediately after spraying, and allow time for trowel finishing to ensure the aesthetic appearance of the slope surface. To provide a product and a spraying method using it. SOLUTION: A cement admixture containing a soluble compound of a Group 4A element, for example, titanium or zirconium, and aluminum sulfate, a cement admixture having a tetravalent group 4A element, cement and the cement admixture. Cement composition containing, as well as arranging reinforcing steel on the slope to form a frame skeleton, spraying the cement composition on the slope, The slope spraying method for constructing a cement-concrete frame containing steel bars is configured. |