A Variety Of Cellulose Ether Tile Adhesive Performance

Now, with the rapid development of new building materials industry inChina, a lot of new tile adhesive, but now the tile adhesive still there are manyshortcomings, such as easy to crack, flake.This selection of four different viscosity hydroxypropyl methyl celluloseether and a methyl cellulose ethers, by changing the dosage of the cellulose ether,the analysis of different viscosity hydroxypropyl methyl cellulose ethers the tileadhesive mechanical properties, working performance, durability; by comparingthe same dosage, the same viscosity hydroxypropyl methyl cellulose, methylcellulose ethers mechanical properties of tile adhesives,working performance,durability study two species of cellulose ether which is more superior to theindividual to improve the performance of the tile adhesive. By XRD and SEMmethods, hydration products of tile adhesives hydration process, and structuremicroscopic analysis.The mechanical properties of the ceramic tile adhesive, irrespective of thehydroxypropyl methyl cellulose ether or methyl cellulose ethers, and theirincorporation of the tile binder, compressive strength, flexural strength showing adeclining trend.28days creaser than reduced trend, they can not can not improvethe compressive strength and flexural strength of the ceramic tile adhesive, but itcan improve the flexibility of the tile adhesive; tile adhesive bonding propertiesWhen the cellulose ether content is less than0.3%methyl cellulose the tileadhesive bonding performance improvement is better than hydroxypropyl methylcellulose ethers, when the dosage is greater than0.4%，the hydroxypropylmethyl cellulose ethers to improve the effect of more than the methyl celluloseether.For the working performance of the tile adhesive, hydroxypropyl methylcellulose ether and methyl cellulose ether has excellent water retention effect,when viscosity and dosage increasing, gradually increasing the consistency of tileadhesives reduce its hierarchical. The five cellulose ether in the tile adhesivedosage increased from0to0.2%, its water retention were increased, and dosagemore than0.6%, the viscosity of the cellulose ether tile adhesives, water retention rate stable at about99%, hydroxypropyl methyl cellulose ether,relatively speaking excellent some of the water retention properties.Cellulose ether dosage and for the durability of the tile adhesive, mixed witha certain degree of cellulose ether to improve the performance of its resistance tofreezing and thawing, so that the rate of loss of strength and mass loss rate after50freeze-thaw cycles viscosity increases; incorporation of methyl cellulose etherhas a significant effect reduced drying shrinkage values of tile adhesives, theirdosage increased from0to0.2%, its3d,7d,28d dry shrinkage value decreasedby63.8%,52.9%,46.6%, and hydroxypropyl methyl cellulose ethers is betterable to reduce the dosage in the range of0to0.1%of the shrinkage value of thetile adhesive, methyl cellulose ether dosage within the range of from0to0.2%,the improvement of the tile adhesive shrinkage preferred; same viscosity, thesame dosage of methyl cellulose ether is hydroxypropyl methyl cellulose ethersof its shrinkage excellent improvement.Its hydration for tile adhesives by XRD and SEM microscopic analysis, thetile adhesive mixed with cellulose ether does not make hydration in a new crystalphase, basically did not change its water of the type and quantity of the product,but slowed in the tile adhesive Ca2+ions and OH-ions dissolved speed andmovement speed it slower hydration, hydration products generated time, alongwith its doped increasing the amount gradually becomes more, the introductionof air bubbles due to the mixing of the cellulose ether, so that the tile adhesiveafter hardening porosity gradually become larger, and gradually become looseand open to its overall structure.