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.
To minimize dry mouth: 1  Drink water frequently to keep your mouth moist and loosen mucus. 2  Suck on sugar-free hard candies, ice chips, or sugar-free popsicles. 3  Moisten foods with broths, soups, sauces, gravy, creams, and butter or margarine.  Avoid commercial mouth rinses or mouthwashes that contain alcohol or peroxide.