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.
How many ml of water should you drink in a day? The Institute of Medicine recommends that men drink 3000 ml of water each day and women drink 2100 ml. This equals approximately 13 cups of liquid for men and 9 cups from women. An individual often requires more water to stay hydrated in hot weather or due to strenuous exercise.