Influence of carbonization humidity on mechanics and durability of carbonization block
The carbonization block is a new type of block,which is developed on the basis of the carbonization method of reactive magnesium oxide(MgO)cement,in which the reactive MgO cement is firstly mixed with aggregates and then CO2 is injected for carbonization to achieve the purpose of improving the strength.The indoor tests of unconfined compressive strength,X-ray diffraction,electron microscope scanning,and thermogravimetric analysis were employed to study the effect of carbonization humidity on the strength and carbonization products.The durability of carbonation block was tested to explore its engineering performance.The results show that the strength of carbonization block is higher than that of ordinary cement block.After 3 days of carbonization curing,the strength of carbonization block can reach 70%～80%of that during 28 days curing,and the strength of block with carbonization humidity of 60%is the best.Carbonation blocks have a strong durability and the durability of carbonated blocks with carbonation humidity of 60%is significantly higher than that of humidity 40%and 80%.The carbonization products of reactive magnesium oxide are magnesite carbonate,brucite and nodular magnesite.The carbonization products in the carbonized block with carbonization humidity 60%are the most dense.
building materialcarbonization blockcarbonization humiditycompressive strengthmicro-structuresdurability
万方数据
维普
