Natural or artificial contains mainly active silicon oxide, activated alumina mineral materials. It after ground into a fine powder mixed with lime water, not only can in air hardening, and can continue to hardening in the water, are called pozzolanic material, has the dual nature of glass and microcrystalline phase. Original ash refers to the lava, volcanic eruptions, the ground due to the low ground temperature, low pressure polyethylene cold generated vitreous material.
After it was found that the adding lime when a volcano erupts spewing “ash”, not only can the air hardening, and hardening in water, get the hydraulic properties similar to those of general cement. This mixing of pozzolanic material is a kind of active mixing materials, it can be a composite Portland cement, Portland cement made of pozzolana Portland cement and fly ash Portland cement.
Pozzolana cement production line
Pozzolana Cement hydration, setting and hardening process is mainly the clinker hydration and mixed material associated with the reaction of Ca(OH)2. Pozzolana Cement after adding water, the first is the hydration of Portland Cement clinker, generate the Ca(OH)2, become mixed with pozzolanic materials produce secondary hydration reaction of exciting agent; The activity of pozzolanic admixture in the highly fragmented oxide absorption of Ca (OH) 2, and then by the reaction with hydrated calcium silicate as the main body of the hydration products, namely, hydrated calcium silicate gel and hydration of calcium aluminate gel. In fact, Pozzolana Cement hydration reaction is twice alternate, and condition each other, restrict each other, and is not a simple isolated. Such as: due to the secondary reaction, to a certain extent, consumes clinker of hydration products, namely, the liquid phase of Ca (OH) 2 and active SiO2 and Al2O3 secondary hydration reaction, formation of hydrated calcium silicate, and hydrated calcium aluminate, thus reduce its concentration (alkalinity lower), as a result, which in turn prompted clinker mineral continue hydration, so repeated, until the reaction completely.
Pozzolana cement production equipment
Pozzolana cement production line as raw material preparation, can be divided into dry process (including semi-dry method) and wet (including half wet) two kinds.Shanghai shibang mining machinery co., LTD is a professional production and sale of modern leader. This company produces the dryer, grinding equipment, crushing equipment, all the precise calculation of design by senior engineer operating computer. Welcome to consultation, online customer service, for equipment quotation and technical parameters of information.