Research Of Low Carbon Concrete Development Based On Magnesium Silicate Hydrate System

Concrete is one of the most common used building materials. Under the tendency of worldwide energy conservation, consumption reduction and emission reduction, it’s necessary to develop the concrete in the "low carbon, environmentally friendly, rational use of resource and energy reduction" way. China accounts for over half of the total production of concrete, a large amount of CO2 was discharged as the result of fuel combustion and the decomposition of carbonate. Thus, the development of low carbon economy of concrete will promote the emission reduction of CO2. As the main country of concrete production, any adjustment of the details will bring great benefits. This article discusses the method of low carbon and emission reduction based on the current situation and development of concrete and makes a systematical research on the mortar using magnesium silicate hydrate system as the binding material. Magnesium silicate hydrate system is achieved by the reaction of light-burned MgO and active silica material. Based on the study of magnesium silicate hydrate system, the research develops a new kind of low carbon mortar and the studies the effects of curing temperature, W/C, curing time and method to the formation of M-S-H gel. As the result of the research, the characteristics of low alkalinity mortar are associated with the content of sand and W/C, this kind of mortar has the potential to be basic material for new low carbon concrete.