Introduction. Autoclaved aerated concrete is a versatile lightweight construction material and usually used as blocks. Compared with normal (ie: dense concrete) aircrete has a low density and excellent insulation properties.he pulverised flyash is usually milled to achieve adequate fineness. A small amount of anhydrite or gypsum is also often added. Autoclaved aerated concrete is quite different from dense concrete (ie: normal concrete) in both the way it is produced and in the composition of the final product.
Lesson Summary. The activation energy is the energy required to start a reaction. Enzymes are proteins that bind to a molecule (substrate) to modify it and lower the energy required to make it react. The rate of reaction is given by the Arrhenius equation.
In the diagram on the right, the energy is taken from the surroundings and stored as potential energy in the products. (a) is the activation energy for the reaction to take place whilst (c) is the energy change (known as enthalpy change).