Abrams established a rule that relates the water-cement ratio tostrength of concrete. List two additional factors that have asignificant influnce on the concrete strength.
Q2. Explain does why: • The transtion zone impact more richcementitious mixtures than lean ones.
• Air entrainment reduce the strength of moderate to highstrength concrete yet may enhance the strength of low strengthconcrete.
• ASTM cements Type I. III, and V have different impact on earlyand later strength of concretes made with these cements.
• On the basis of qual workability the surface characteristicsof aggregate have a limited impact on the ultimate strength ofconcrete.
• the surface characteristics of aggregate have a clear impacton ultimate strength of concrete on the basis of qual watercontent.
• The cylinder strength is higher than that of cube's.
• The aspect ratio of concrete cylinders has no impact oncompressive strength obtained in compression testing machine withbrush platens.
• Concrete bridges should not be subjected to stress levelshigher than 0.55 of ultimate strengths.
• the maximum aggregate size of aggregate have two opposingeffects on concrete strength.
