| 摘要 |
PROBLEM TO BE SOLVED: To obtain a concrete with which concrete member or buildings can be effectively protected from corrosion by adding an emulsion containing a hydrolyzable org. silicon compd. to a concrete mixture comprising an inorg. component, a small amt. of org. component and water. SOLUTION: In the production of a concrete, an org. silicon compd. expressed by the formula, and if necessary, aq. emulsion containing its condensate are added to a water-contg. mixture comprising an ironing. component usually used, and if necessary, a small amt. of org. component in the mixing process of the concrete or after mixing. In the formula, R<1> is a1-3C alkyl; R<3> is a1-20C alkyl or phenyl: (a) is 0 or 1; (b) is 1 or 2;(c) is 1 to 18; X is H, Cl, Br, I, NH2 , SCN, CN, N3 an NHR, an N(R)2 , an N(R)3 , an aryl, Sx or absent; R is same as R<1> ; (x) is 1 to 6. The amt. of the org. compd. or the emulsion added is 0.1 to 10 wt.% of the cement. The mixture is hardened to obtain a concrete which can be made hydrophobic in a block state. |
