Marl for repairing modern cultural relic architecture decoration

Abstract

The invention discloses marl for repairing modern cultural relic architecture decoration. The marl is prepared from water, fly ash, quick lime, water-washing medium sand, activated silicon dioxide, activated calcium dioxide, silicic acid, calcium bicarbonate and titanium oxide. According to the marl disclosed by the invention, the activated silicon dioxide, the activated calcium dioxide and the water react to rapidly generate calcium silicate hydrate and the calcium silicate hydrate is subjected to hardening and dry shrinkage to form a hardened framework; the hardened framework can be used forlimiting later-period dry shrinkage of the calcium silicate hydrate generated by the fly ash, the quick lime and the water, calcium aluminate hydrate, calcium alumino-ferrite hydrate and calcium sulfoaluminate hydrate; the dry shrinkage is reduced, so that the marl can be matched with an original cultural relic very well. Moreover, the mineral characteristic value of a material formed by adoptingthe formula provided by the invention is similar with the mineral characteristic value of the original cultural relic, and the material has good compatibility with the original cultural relic. Furthermore, calcium hydroxide generated in a process is consumed in volcanic ash reaction, so that the corrosion resistance and durability of the material formed by adopting the formula provided by the invention can be effectively enhanced.

Description

technical field [0001] The invention relates to the technical field of restoration of cultural relics, in particular to a plaster used for repairing modern cultural relics architectural decoration. Background technique [0002] Since the decoration of modern cultural relics has been exposed to the wind, rain and sun of the external environment, the color of the architectural decoration will be different from the color of the concrete used at that time, which is off-white. In the restoration of modern cultural relics, concrete materials made of composite portland cement, river sand and water are usually used, but the concrete produced by the existing technology has significant differences in mineral characteristic values ​​from the original cultural relics, resulting In addition, the main components of the existing Portland cement are tricalcium silicate and tricalcium aluminate, and tricalcium silicate and tricalcium aluminate have the problem of large drying shrinkage after...

AI Technical Summary

Problems solved by technology

In the restoration of modern cultural relics, concrete materials made of composite portland cement, river sand and water are usually used, but the concrete produced by the existing technology has significant differences in mineral characteristic values ​​from the original cultural relics, resulting In addition, the main components of the existing Portland cement are tricalcium silicate and tricalcium aluminate, and tricalcium silicate and tricalcium aluminate have the problem of large drying shrinkage after hydration and hardening, which is different from the original cultural relics. The matching is poor; further, due to the presence of chromium oxide and other substances in ordinary Portland cement, Portland cement appears bluish after hydration and hardening, which is obviously different from the color of the original cultural relics

Moreover, the hydration of Portland cement will generate calcium hydroxide, which is easy to react with acidic substances (such as acid rain), so its corrosion resistance and durability are relatively poor, and it is easy to fall off and separate from the original cultural relics

However, the mineral characteristic value of the material produced by the volcanic reaction of fly ash, quicklime and water is different from that of the original cultural relic, which leads to incompatibility with the original cultural relic; the drying shrinkage is large, and the matching with the original cultural relic is poor.

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