Diatomaceous Earth Element Face Brick: Preparation And Performances

Diatomite is well known as an important nonmetallic natural mineral, having thefollowing features: multi-microporous, strong absorbability, steady performance, lowdensity and environmentally friendly. As a raw material for decoration, diatomite hasthe advantage of thermal insulation, non-combustible, humidity regulation, airpurification, etc. Therefore, exploitation and utilization of diatomite in the field ofbuilding materials have profound significance to promote the development of modernconstruction industry with energy saving and environmental protection.There is plenty of diatomite in China, the total amount of reserve ranks the secondin the world. But the majority has low grade, which generally cannot be fully utilized.So how to utilize these low-grade diatomite resources efficiently would be significantmatter. In this experiment, we’ll take grade II and grade III raw soil as a material tostudy the optimum technology to produce face brick from diatomite. The technicalindexes of products refer to the indexes of similar products of Japanese diatomaceousshale. Based on single factor experiment, we found that the optimum technologyconditions and the intensity and moisture adsorption/desorption performance of facebrick prepares are equal to or a little higher than those of Japanese diatomaceous shaleface brick. In addition, it has special functionality of photo catalysis and the anionreleasing. This experiment uses the waterless method to grind the diatomite rawbetonies to about15μm, inspecting the different watering quantity, the pressure, toguarantee presses factors and so on time, cementing agent type and amount used to theproduct quality influence. Through suppressed formation method, optimum processconditions prepared by brick can be determined. The results show that the water contentin the raw materials10%,1%of the amount of binder, molding pressure of2.5MPa, theholding time of25s can be made ideal conditions for brick, The ideal unfired brickunder the different roasting temperature, the roasting time burns obtains thediatomaceous earth element face brick. The ideal unfired brick under the differentroasting temperature, the roasting time burns obtains the diatomaceous earth element face brick. Uses the multi-purpose presses, the dilution performance cryoscope, thespectrophotometer and so on to carry on the product the performance examination andthe analysis, the results show that in1100℃roasting, heat preservation2hours to makethe samples the flexural strength to Japan, the shale brick diatom index, the second-levelearth for the substrate element face brick water-absorptivity is37.6531%, has achievedJapan diatomaceous shale brick’s level, the third-level earth for the substrate elementface brick water-absorptivity is27.0026%, misses slightly compared to Japandiatomaceous shale brick.This experiment also studied enhanced diatom earthen foundation element facebrick’s other functionality method. Using the titanium dioxide photochemical catalysisand the tourmaline release negative oxygen ion performance, join the titanium dioxide,the tourmaline function supplementary material separately in the diatomaceous earthfine earth. Using the spectrophotometer, in the ultraviolet ray illumination, determinedhas joined the dosage titanium dioxide differently the diatomaceous earth element facebrick to the methylene blue resolver degeneration performance, the result indicated thatafter joining the titanium dioxide, has certain photochemical catalysis performance. Thedetermination takes the function supplementary material by the tourmaline thediatomaceous earth element face brick to the malachite green solution degenerationeffect, the result indicated that joins the diatomaceous earth element face brick whichthe tourmaline prepares to have releases negative oxygen ion performance.