Application Research Of Special Soft Adhesive For Compound Stone

Throughout the history of mankind, stone has been used much earlier, lots ofhistoric buildings and lithoid antiquities had been inherited. Since natural stone hasitself defects such as limited resource, hardness of exploitation and difficulty ofprocessing, human being had developed artificial marble from1970s. Compoundstone, named for artificial stone, synthetic stone, artificial marble or agglomeratedmarble, is a decorative material which is made of detritus and other inorganic piecesand binder via a special process, has decorative pattern, texture and performanceresembling natural stone. Artificial stone holds a higher intension, a thinner thicknessand a lighter weight in comparison with natural stones, and it is easier to cement,adding its performance resembling natural stone, it is used at modern indoordecorations increasingly and widely. The binder used for making resinic compoundstone is unsaturated polyester or thermoplastic macromer, macromer has a special traitthat is temperature stress, compound stone which is made of macromer has thisspecial trait as well, its shrink and expansion namely expansile coefficient caused bytemperature are different from that of natural marble and ceramic tile’s. Experiencetells us that compound stone holds a trait of bigger expansile coefficient, when it isused for plain cement to adhibit the stone, because the expansile coefficient of theconcrete does not match that of compound stone, it is easy to bring the later defectssuch as cock, distortion, hollow and even craze, especially when the season’sconversion meets the air temperature changing sharply, these defects occur moreeasily, the occurring of these defects limits the development of compound stoneprofoundly. The same problem may appear to the situation of using plain cement toadhibit natural marble and ceramic tile’s. Because the cause can be mainly attributedto adhesive, from1950s in Europe, some developed countries had begun to researchDry-Mixed Mortar, and strike up production line at the same time, started a upsurge ofproduce. In recent years, some high schools and institutes of our country appeared tocarry out the same research continually too.The purpose of this paper is to develop a soft adhesive special for compoundstone based on the surface trait and application message of resinic compound stone,the formulation will be revised and mended during application practice. Finally, wehope the traditional problem could be resolved, and the application of compoundstone would be improved. This paper begins from the effect of additive to adhesive, referring “Adhesivesfor ceramic wall and floor tile” and “Standard for test method of basic properties ofconstruction mortar”, and considering the working practice and later alkali erodecase of compound stone, three formulations have been designed，two formulations aremono-component adhesive of ordinary Portland Cement series, the other isbi-component adhesive of ordinary Portland Cement series.According to mechanical performance testing and practical working experience,a conclusion can be made that mono-component adhesive of ordinary PortlandCement series and bi-component adhesive of ordinary Portland Cement seriesresearched in this paper both are easy working, and have a high adhesive strength anda well alkali resistance. For example the28d adhesion strength of the formulationWFJ-SI researched in this paper is1.80MPa, its time of final setting is2.5hours, thecorresponding strength and final setting time of the formulation WFJ-SⅡresearchedin this paper is3.08MPa and5.0hours, the specific retention of both can reach99.9%,both have been used in practical engineering, and both achieved a favorable comment.