Abstract
A comparative study of the mechanical properties, volume stability and durability of high-volume limestone powder concrete (HVLPC) and high-volume fly ash concrete (HVFAC) was conducted by testing pore structures of the paste and determining the adiabatic temperature rise, porosity, compressive strength, chloride ion permeability, 1year's natural carbonation depth and dry shrinkage strains of the concrete. The test results illustrate that the reductive influence of high-volume limestone powder on the temperature rise of the massive concrete is identical to that of the high-volume fly ash. Compared with high-volume fly ash concrete, high-volume limestone powder concrete with the same water/binder ratio has relatively high interconnected porosity, low compressive strength, and low resistance to carbonation and chloride ion penetration, especially at the steam-curing conditions. The volume stability of concrete containing a high volume of limestone powder is almost identical to that of concrete containing fly ash with the same water/binder ratio. Reducing the water/binder ratio and replacing part of the limestone powder by ground granulated blast furnace slag can reduce the negative effects of limestone powder on the macro-properties of concrete.
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