A. Clive Houlsby, a leading authority on cement grouting methods in dams and large structures who maintained a widely consulted internet site called Rockgrout, died on Sept. 24 in Sydney. He was 82.HOULSBYHoulsby suffered from cancer, says a colleague, U.S.-based engineer Jim Warner. A former dam safety chief of the Water Resources Commission in New South Wales, Australia, Houlsby became a global consultant and lecturer in the 1980s.In the 1970s, he advocated for what was then a controversial change in the water-cement ratio for structural grout. While critics deemed his recommendation as a “heresy,” Houlsby's formula is now standard practice,
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.