For those like myself wondering why sugar was used and how it helped this situation then I found this URL most enlightening:- http://www.telegraph.co.uk/scienc

For those like myself wondering why sugar was used and how it helped this situation then I found this URL most enlightening:- http://www.telegraph.co.uk/science/science-news/10594718/Why-sugar-helped-remove-Victoria-Line-concrete-flood.html http://www.telegraph.co.uk/science/science-news/10594718/Why... "Concrete is made using cement, which is a combination of crushed and heated limestone, clay and gypsum; aggregate, such as gravel and sand; and water. Adding water causes a chemical reaction called hydration, where hydrogen from the water combines with calcium, sulphate, aluminium and silicon from the cement. This releases heat and depending on the proportions of each of these minerals, which hydrate at different rates, can set at varying speeds. Sugar, however, is composed of carbon, oxygen and hydrogen atoms which can interfere with the hydration process by binding with the minerals and slow down the reaction."