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Summary
This examine centered on the results of dolomite powder on the properties of C30 and C50 concretes. The microstructure, splitting tensile energy, compressive energy and fracture toughness property of concretes incorporating dolomite powder have been measured by mercury intrusion porosimetry (MIP), stress testing machine and common testing machine. Larger splitting tensile energy, compressive energy and fracture toughness of concretes may very well be seen with the rise of dolomite powder dosage inside 90 days. After 1 day of curing, splitting tensile energy, compressive energy and fracture toughness of C30 and C50 concretes may very well be improved significantly. The optimistic results of dolomite powder on the splitting tensile energy, compressive energy and fracture toughness decreased with the rise of curing age. As a result of the nucleation impact, micro-filler impact and blend proportions design of dolomite powder have been useful to the refinement of pore construction of concretes, and dolomite powder had much less affect on the later stage of cement hydration. The splitting tensile energy equations expressed by way of the compressive energy was proposed. The evaluation of regression equation proved that the equation of relationship between compressive energy and splitting tensile energy of concretes containing dolomite powder on this examine had excessive prediction accuracy.
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