With the commercial advent of modern day Portland-cement, the use of concrete in construction blossomed and grew to large quantities by the early part of the 20th Century. The projects listed here provide a good sampling of historic concrete restoration, patching, and repair jobs, illustrating the use of concrete in historic buildings and facades.
The former Vine Tower Building is now the West Coast headquarters of the American Musical and Dramatic Academy. Constructed in the 20's using materials and techniques common for this period, the board-formed cast-in-place concrete veneer was restored and preserved using specialty repair mortars. Wikipedia Reference: http://en.wikipedia.org/wiki/American_Musical_and_Dramatic_Academy
South Pasadena's Oaklawn bridge is the first cast-in-place concrete bridge built west of the Mississippi River and the second oldest such structure in the US, as well as the only bridge ever designed by the renowned architects Greene + Greene. Inexperience in using the relatively new technique of cast-in-place concrete...
The board-formed concrete facade of the decorative facade had deteriorated significantly and needed cleaning, patching, and new surface treatments to preserve and restore the surface to its former Deco glory. Wikipedia Reference: http://en.wikipedia.org/wiki/1932_Summer_Olympics
The Cabrillo Bridge was constructed for the 1915 California Exhibition and had the usual issues with rusting and decay of internal steel reinforcing bars. When chunks of concrete began falling on the Cabrillo Freeway below, a restoration and stabilization project was immediately started. Wikipedia Reference: http://en.wikipedia.org/wiki/Cabrillo_Bridge