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 Institute of Medicine has determined how much water the average man or woman needs to drink to be healthy: Men -- The average man should drink 3.7 liters or 15 cups of water per day. Women -- The average woman should drink 2.7 liters or 11 cups of water per day. That's a lot more than the 8 cups that you're used to drinking! The good news is that you don't need to get all of your water just by drinking! The recommendations above is for total water intake, which means liquid in all of its forms.