material properties of microsilica-pg电玩城

under the synergy of high efficiency water reducing agent, in the process of mixing, tiny round sphere surface covered with a layer of micro silicon powder particles surface active substance, and cement particles and other mineral admixtures particles, produce electrostatic repulsion between particles, and because of the spherical silica fume is far less than the cement particles, they "ball" effect between the cement particles, increase the mobility of cement paste, so as to make it easier to pump and infusion, so the effective enhancement effect to reflect.  

the addition of activated microsilica forms a large number of low-alkali hydrated calcium silicate gelling in concrete hydrates, which can absorb and fix a large number of na and k ions, thus greatly reducing the effective alkali content in the concrete pore solution, thus greatly reducing the harmfulness of alkali aggregate reaction. 

moreover, silicon powder can also fill the gap between cement particles and the interface, which greatly improves the impermeability of concrete. in this way, water and erosion media can hardly enter the interior of concrete, so the durability of concrete is greatly improved. generally speaking, the effect of reducing permeability of microsilica is greater than the increase of strength, especially when microsilica is mixed with low strength concrete in a small amount. for high-performance concrete with a certain amount of microsilica, water-binder ratio is usually less than 0.4, and it is filled with ultrafine particles. therefore, high-performance concrete mixed with microsilica has a very good impermeability. as the addition of microsilica can significantly reduce the permeability of concrete and reduce the free ca(oh)2, thus improving the resistance of concrete to chemical erosion. in concrete mixed with silicon powder, can reduce the content of ca (oh) 2, increase the density of concrete, improve the ability of weak acid corrosion, but not in a strong or weak acid of high depth, due to the concrete in the c - s - h in the acid decomposition, in addition, it also can resistance to salt corrosion, especially for chlorine salt and sulphate class, it can resist acid salt erosion, reason is relatively dense, micro silicon powder concrete pore structure is improved, thus reducing the harmful ion transfer speed and reduced the soluble ca (oh) 2 and ettringite formation, and increase the result of hydrated calcium silicate crystals.

microsilica concrete can improve the permeability and salt corrosion resistance and protect the steel bar. in underwater engineering, chlorine ions infiltrate into concrete, causing rapid corrosion of steel bar, concrete delamination, short life and serious damage. the method of catheter is generally used for underwater concrete pouring. as the cement slurry is lost, it cannot bond well with the base and reduces the strength of the contact part with water. these problems can be obviously improved by adding microsilica into underwater concrete. it takes 28 days for the road to be opened normally to traffic. generally, it takes 3 days for the early strong concrete to be opened to traffic. damage to the concrete road surface is inevitable. repair by conventional means, often resulting in traffic disruption, resulting in serious economic losses. the application of micromicrosilica concrete with early strength and abrasion resistance is ideal. the airport runway requires the use of concrete over 80mpa and has good abrasion resistance.