000			01092cam a2200205 4500
001			WB@3612-84
008			041123n2004 000 0 eng u
035			_a(Sirsi) u128093
245			_aNew concrete cancer threat
260			_c2004
490			_aNew Civil Engineer _v18 November 2004, 10(1)
520			_aBridges, dams, tunnels and other major structures are threatened by the return of concrete cancer according to a leading specialist. The phenomenon, properly known as alkali aggregate reactivity, causes massive cracking in affected structures. Many structures were repaired after the problem occurred in the late 1970s and 1980s. Research carried out then resulted in changes to materials specifications to limit alkali content. It is thought that the increase in use of recycled aggregates like glass has been a trigger for the problem reoccurring now.
590			_aWB
590			_aWB
650			_aCONCRETE CANCER
650			_aCONCRETE STRUCTURES
650			_aALKALI AGGREGATE REACTIVITY
690			_aBUILDING AND CONSTRUCTION-MATERIALS AND PRODUCTS
942			_n0
999			_c118358 _d118358