Fresh concrete is perishable and will lose quality if it sits in the truck too long. ASTM C 94, Standard Specification for Ready Mixed Concrete, says that concrete should be discharged within 90 minutes and before 300 revolutions of the mixer after water has been added to the cement.
You can prevent cavities. Minerals in our saliva, such as calcium and phosphate, along with the protective fluoride that we can get from fluoride toothpaste or a fluoride rinse or in some cases from fluoridated tap water, can repair minerals and protect them from acid damage.
Water: The best thirst quencher is also the smartest choice for your teeth. Water helps wash acid-producing foods from the mouth. Sugar-free drinks: If you like your water sweetened, choose sugar-free drinks. Because sugar-free drinks wash acid-producing food from the mouth, they may help reduce cavity risk.