Anhydrous loam brick product repair agent

Abstract

The invention relates to an anhydrous loam brick product repair agent, which is characterized in that the repair agent comprises the following components in percentage by weight: 15 to 25% of lime, 10 to 20% of old clay brick powder, 60 to 80% of quartz sand, 1 to 5% of pigment, 1 to 2% of redispersable rubber powder and 1 to 2% of other additives. Compared with the prior art, the invention can meet the special requirements on repairing old bricks especially brick sculptures, clay cultural relics and the like without whiskering, the product repaired with the repair agent has low-moderate intensity, and the repair point does not drop easily and has good weatherability.

Description

Technical field [0001] The invention relates to a new material, in particular to a cement-free brick product repair agent. Background technique [0002] 1. The characteristics of ancient brick products and their technical requirements for repairing agents [0003] Brick products are one of the important building materials in my country's historical buildings, and it can be traced back to the Zhou Dynasty. During the Ming and Qing dynasties, brick making and use of bricks became popular. In modern times, many buildings were built using fired clay bricks. Different from European sintered clay bricks, most of the sintered clay bricks in China are blue bricks, and their firing temperature is low, generally less than 1000 ℃, while the bricks of Shanhaiguan city wall are simple low-temperature baking according to the inventor’s preliminary research. Baked, so the compressive strength is low, generally less than 5-10Mpa (megapa), the strength of the weathered parts that need to be repai...

AI Technical Summary

Problems solved by technology

Its main components are lime paste and pigments (iron red, iron yellow, iron black, etc.), which are now prepared on-site. It is characterized by low strength and good constructability. The disadvantage is that it is not resistant to water and freezing, and its color is easy to change. Poor weather resistance (weather resistance refers to the damage of natural conditions such as sun and rain, thermal expansion and contraction, acid rain and other natural conditions after the material is used outdoors), easy to change color, and the repaired part is easy to fall off;

[0019] The third category: polymer-modified cement-based restoration agent, whose main components are prefabricated commercial mortars such as cement, river sand, and other additives, which are prepared by adding water on site, and are characterized by high strength and good constructability , is the most used repairing agent, the disadvantage is that it fades, the strength is too high, and the repaired part is easy to fall off

Although the strength of many lime materials found in archaeology can be compared with that of concrete, and the age exceeds thousands of years, we still lack scientific experimental research on its formulation, applicable conditions, construction technology and other application issues.