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.
Read on to calculate how much water you should be drinking each day based on your own unique needs. Are You Drinking Enough Water for Your Body Weight? According to the Mayo Clinic, men should generally drink about 13 cups of water a day, while women should aim for nine. But if you want to determine the exact amount you should be drinking by your body weight, it's easy to do.