sultsinamajordifferenceinthemechanicalanddurabilitybehaviorofboththecementpasteandthetransitionzonebetweenthepasteandtheaggregates.Full-sizeimage(K)Fig..SchematicalrepresentationofthemicrostructureoftwocementpasteshavingW/Cratiosof.and..Full-sizeimage(K)Fig..Microstructureofhighwater/cementratioconcrete:(a)highporosityandheterogeneityofthematrix,(b)orientatedcrystalofCa(OH)onaggregate(AG),(c)CHcryllenditslifecycleaslimestone,clay,andsilicasand,whicharethemoststablemineralformsofcalcium,silica,iron,andaluminumintheearth’senvironment.Therefore,allwecandoasengineersorscientistsistoextendthelifecycleofthisartificialrockasmuchaspossible.Theconcretethatwasknownashigh-strengthconcreteinthelatesisnowreferredtoasHPCbecauseithasbeenfoundtobemuchmorethanjuststronger:itdisplaysenhancedperformancesinsuchareasasdurabilityandabrasionresistance.Althoughwidelyused,theexpression“HPC”isveryoft