A kind of modified shell ash mortar and preparation method thereof

Abstract

A modified shell ash mortar and a preparation method thereof relate to building materials. The modified shell ash mortar is calculated in parts by mass, including 0.6-0.8 parts of shell ash paste, 0.15-0.35 parts of mineral powder, 0.05 parts of silica fume, 2.5 parts of sand, and 0.2-0.3 parts of tap water. Preparation method: Pour oyster shell ash into a large plastic bucket, add 3 to 4 times of water to mature, stir evenly, settle, and after aging, it will become shell ash paste for use; take out the aged shell ash paste, Measure and adjust the consistency value of the shell ash paste in the range of 120mm±5mm; weigh the raw materials according to the mass ratio; put the sand, mineral powder and silica fume into the mortar mixer and mix them evenly for at least 1min, then add the shell ash paste and water and stir together for at least 1 minute 3min, mix well and serve. Fast setting and hardening, high strength and cohesive force, high elastic modulus, good weather resistance, small shrinkage deformation, stable volume; good compatibility and matching with masonry historical building masonry.

Description

technical field [0001] The invention relates to building materials, in particular to a modified shell ash mortar used for reinforcement and restoration of cultural relics buildings and historical buildings with traditional features and new buildings with traditional features and a preparation method thereof. Background technique [0002] Lime is one of the earliest inorganic cementitious materials used by humans. It is compatible with masonry materials of historical buildings and will not cause secondary damage to historical buildings. It has irreplaceable advantages in the field of historical building restoration. Lime mortar can be well matched with masonry, which not only avoids the problems of easy aging and short service life of organic repair materials such as polymer grout, grout, and polymer mortar, but also avoids the use of cement-based mortar for repair. The problem of obvious color difference and high strength caused by the time, and the matching between the two ...

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Problems solved by technology

[0025] The purpose of the present invention is to solve the performance defects of traditional shell ash mortar such as slow setting and hardening, low hardening strength, large shrinkage deformation and poor weather resistance, to provide the same appearance as the traditional shell ash mortar, small color difference, good reinforcement and repair effect, and meet the needs of cultural relics. A kind of modified shell ash mortar and its preparation method required by "renovating the old as old" of historical buildings

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