Explore Raw ash FAQ

Raw ash is the ash produced in the combustion process, containing silicon, aluminum, calcium and other elements, with a high degree of fineness and crushing. In the construction industry, Raw ash is often used as a concrete admixture to improve the performance of concrete, increase durability and reduce costs. However, using Raw ash comes with some common problems.
First of all, the quality of Raw ash is the focus of attention in the use process. Due to the different sources of Raw ash, its chemical composition and particle size will be different, so it is particularly important to choose Raw ash with stable quality. Secondly, Raw ash has strong water absorption. If the water-cement ratio cannot be controlled, it may cause concrete strength to decrease or cracks.
In addition, Raw ash may contain a certain amount of alkali metal oxides. If used in excess, it may cause the alkali aggregate reaction inside the concrete and affect the durability of the concrete. In addition, inorganic salts and chloride ions in Raw ash may increase the erosion of concrete and affect the service life of concrete.
In order to solve these problems, it is recommended to pay attention to raw material source, quality stability and chemical composition analysis when selecting Raw ash. At the same time, in the design of concrete mixing ratio, it is necessary to control the water-cement ratio, reasonably mix Raw ash, and avoid excessive use. In addition, the storage and packaging of Raw ash should also pay attention to moisture and sun protection to ensure its stable quality.
To sum up, understanding the common problems of Raw ash and dealing with them scientifically and reasonably will help to improve the performance of concrete and ensure the quality and safety of the project.