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.
The average person drinks about 20 ounces of water a day, or about 1/4 gallon. The average amount of water used per person to cook is about 1 gallon per day. Add these all up and you get about 44 gallons per day.