EFFECTS OF CONSERVATION SYSTEM ON THE CARRYING CAPACITY OF REACTIVE POWDER CONCRETE
In order to study the influence of reactive powder concrete on the bearing capacity under different curing regimes,30 reactive powder concrete test blocks and 2 HRB500 grade steel reactive powder concrete simply supported beams were fabricated for compressive,flexural,and bending bearing capacity studies.The variation of the bearing capacity of the test blocks and test beams with temperature was analyzed,and the internal structural changes of reactive powder concrete under different curing regimes were investigated using scanning electron microscopy.Research structure shows that:(1)When the curing temperature of the test specimen is within the range of[normal temperature-180℃],the mass loss of RPC is very small;(2)When the temperature is below 180℃,the hydration reaction of cement intensifies as the temperature rises,the microstructure of RPC improves,and the compressive strength increases;(3)When the temperature reaches the set value,the compressive strength of the concrete cured at the set temperature is slightly higher than that of the concrete cured at non-constant temperature;(4)When the curing temperature reaches 180℃,there are still unhydrated particles in the RPC matrix,which suggests that the curing temperature can be further increased.
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