Joint sand used for paver applications should be a course, washed concrete sand. This sand takes more time to get into the joints, but is also more difficult to wash out. Do not use silica sand or mason sand. The joint sand should also be completely dry. If the sand you have is damp, spread it out to dry before using. Wet and damp sand will prevent it from flowing freely into the paver joints.
Drinking eight cups or two litres of water a day is longstanding advice. But is there any scientific basis for it, asks Dr Chris van Tulleken.
Water makes up 60 percent of our body weight, and can vary depending on size and gender (1). Hydration can come from water, food, or metabolic water production. Generally speaking, healthy adults should drink a minimum of 2 liters, or 8.5 cups, of water or fluid every day. However, that can vary greatly from person to person (1-4). While considering optimal hydration there are a few factors to keep in mind.