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Anonymous users2024-02-081. Surface cleaning: use deionization to clean the dust, black sediment, moss, etc. on the rock surface. The purpose of surface cleaning is in addition to cleaning.
In addition to the dirt from the rock mass, the lower plants that grow on the rocks are removed in order to isolate the organic acid leaching that occurs during their growth.
Erosion of rocks. 2. Pulp desalination: Pulp coating is divided into three times to remove the soluble salts inside the stone carvings, so as to avoid the reaction of soluble salts in humid air with the change of temperature and humidity, crystallization and precipitation of the surface, resulting in volume expansion and loss of rock surface.
3. Anhydrous washing: anhydrous ethanol cleans the rock mass to achieve the effect of permeable capillaries, dredge holes, and prepare for penetration reinforcement
4. Penetration reinforcement: SAE-300 elastic reinforcement is used to strengthen the rock. The polymerized SAE-300 is slowly hydrolyzed in solution, and the mineral particles of the rock are bound together by the silicate film during the reaction process, without ***, and does not affect the physical characteristics such as the water absorption rate of the rock.
No isolation layer is formed on the rock surface, but a uniform strength profile is formed. The reaction is as follows:
Si(OR) 4H2O (catalyst H2O) SiO2AQ roH2O
5. Hydrophobic treatment: apply water-repellent agent, isolate the water medium, and cut off the pollution source.
6. The laboratory does the softening test of aging epoxy resin residues.
After the end of the experiment, the uninterrupted observation records for more than two months showed that there was no significant change in the appearance of the experimental rock face. The hydrophobic effect is remarkable; The reinforcement experiments show that the average compressive strength of the ten groups of rock samples without reinforcement measures is that after being reinforced with SAE-300 reagent, the average compressive strength is . The performance shown in various experiments fully shows that the coating method of this material can minimize the weathering rate of the rock surface and reduce the erosion of wind, rain, dust and other factors. At the same time, whether it is the reinforcement measures of SAE or the hydrophobic measures of hydrophobic reagents, they are reversible and do not affect the effectiveness of other protective measures in the future.
This SAE reinforcement and hydrophobic protection method has been applied in China in recent years, such as the masonry reinforcement at the top of the Big Wild Goose Pagoda in Xi'an: the local reinforcement in the Banpo site in Shaanxi and the reinforcement and anti-seepage project of the Qianling limestone in Shaanxi.
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Anonymous users2024-02-07In view of the characteristics of stone cultural relics and the causes of weathering and alteration, the method of coating a layer of protective coating on the surface of stone carvings is adopted at home and abroad to protect stone cultural relics. Epoxy resin, acrylic resin, silicone materials and a variety of inorganic materials have been developed, among which the alkoxysilane hydrolysate is used as a protective coating with a better effect. After the alkyl alkoxysilane hydrolysate is film-formed, due to stone carvings, stone carvings, etc.
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New dust cloth, every Spring Festival is coming, every household must clean the environment, clean all kinds of utensils, dismantle and wash bedding curtains, sprinkle and sweep the courtyard of Liulu, dust and dirt cobwebs, and dredge open channel culverts; On Chinese New Year's Eve, everyone stays awake all night to wait for the dawn of the day, which is called the New Year's Celebration; Greeting cards are exchanged and worshippers are tattooed on the door book, which means New Year's greetings, and its meaning is the same as that of modern New Year's cards.