Repair grout for cracks in earth ruins using original soil and its preparation and use method

Abstract

The grout for repairing cracks in earthen ruins using original soil and its preparation and use methods. According to mass percentage, its components are: original soil in earthen ruins: 50%~55%, dry fine sand: 15%~17%, and concentration of 26.6%. Water glass: 28%~34%, sodium lignosulfonate: 1%. The steps of the preparation and use method are: step (1) grinding the original soil of the earthen site into powder; step (2) preparing pure dry fine sand and 26% sodium silicate aqueous solution; analyzing pure sodium lignosulfonate; step (3) Add lignin, original soil and fine sand to the sodium silicate aqueous solution in turn, and stir evenly; step (4) let the slurry stand for more than 1 hour, wait for it to be uniform, and release the air bubbles in the mixture; step (5) use a disposable syringe Check the fluidity of the slurry. If the slurry can pass through the 2mm syringe hole smoothly, it has better fluidity and can be used to repair thinner cracks; when repairing larger cracks, increase the ratio of original soil and fine sand; Step (6) Grouting and curing for 14‑28 days.

Description

technical field [0001] The invention relates to crack repair technology using the original soil of the earth ruins, especially for the rammed earth building made of loess and silt in the northern region, the original soil that has weathered and fallen off can be recycled for crack repair, improving its strength and durability, and reducing artificial bonding The use of materials keeps the original appearance of the earthen site as much as possible. Background technique [0002] There are a large number of earth relics in my country, such as the rammed earth Great Wall and rammed earth buildings. Taking the Great Wall of King Qin Zhao as an example, due to its long history and severe weathering, there are mostly cracks of various causes. If these cracks are not repaired in time, the weathering will be accelerated, causing the rammed earth to crack and collapse. Therefore, it is an important way to protect the cultural relics of the earthen ruins by timely repairing the crac...

AI Technical Summary

Problems solved by technology

This method works well in the short term, but has problems in the long run.

One is that during the anchoring process, it will adversely affect or even destroy the earthen ruins, which is detrimental to the long-term stability of the earthen ruins, and may also accelerate local weathering due to disturbances

The second is that man-made structures are added to the earthen site, which cannot realize the original protection of cultural relics

[0006] 2) A reinforcement method for high-sand content soil sites (CN 105604341 A). This patent is mainly applicable to high-sand content sites. During use, the non-relic soil needs to be washed with water, and mixed with ethyl orthosilicate, ethanol, distilled water, Oxalate, ethanol, etc., the process is complicated, and it is more suitable for sites with high sand content, but not suitable for sites with sticky and weak cohesive soils

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