Sealing material for steel bar grouting connection components and its preparation method and application

Abstract

The invention relates to rebar grouting connecting element sealing materials, and a preparation method and application thereof. The materials are prepared by the following raw materials, by weight, 100 parts of cement, 0-80 parts of activity admixtures, 0.01-10 parts of water reducing agents, 0.01-10 parts of early strength agents, 0.01-30 parts of expanding agents, 0-30 parts of adhesion agents, 0.01-50 parts of plastic retaining agents, 0.01-10 parts of starch ether, 0-100 parts of powder stuffing and 10-300 parts of quartz sand. The sealing materials are prepared through stirring and blending and can be used for sealing process before rebar grouting connection. Compared with the prior art, the sealing materials are good in plasticity, adhesive power and drop smoothness resistance, slurry does not contract, and defects that cracking, water seepage, dropping off and the like are easily generated due to the fact that common cement mortar is used for sealing are overcome. The sealing materials have excellent construction performance, and can be applied to quick extrusion and jetting construction of a caulking gun or a power-driven caulking device. After the sealing materials are adopted to carry out a sealing process, rebar connecting grouting construction can be carried out after one day, and construction efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of building materials and building construction, and in particular relates to a sealing material for steel bar grouting connection components, a preparation method and application thereof. Background technique [0002] Construction industrialization is an inevitable development trend of the construction industry. Prefabricated buildings will become the main form of architectural design and construction in the near future with many advantages such as fast construction speed, less restriction by climatic conditions, labor saving and improvement of construction quality. The structure of prefabricated concrete mainly adopts prefabricated components. Prefabricated component reinforcement connection is one of the key technologies in the design and construction of prefabricated buildings. In traditional cast-in-place concrete structures, the connection of reinforcement is mostly by lap connection, welding connectio...

AI Technical Summary

Problems solved by technology

For the grouting of steel sleeves connecting vertical components (walls or columns), the common grouting process is the grouting process. When installing prefabricated wall panels and columns, place gaskets below to raise the height, leaving 20-40mm overhead height for grouting It is technically difficult to seal the mold of the seat slurry. The existing method is to pre-paste rubber waterstop strips around the lower part of the vertical component. After hoisting, due to the extrusion of the upper and lower components, the rubber strip forms a sealing ring. , and put a layer of sealant on the outside of the water-stop strip. This method is not only cumbersome to construct, but also the rubber strip is easy to be displaced due to extrusion during the hoisting process, and the sealing effect is very unsatisfactory. Glue mainly depends on imports and is expensive

In addition, ordinary cement mortar is also used for sealing treatment on the outside of the vertical member. Since the mortar is not allowed to enter the gap of the seat layer, dry hard cement mortar is generally used. Due to the low strength and slow development of ordinary cement mortar, the adhesion is also poor. , it is difficult to form an effective plug, when there is a slight pressure during grouting, it is easy to cause the phenomenon of grouting, which may lead to the failure of the steel grouting connection and the scrapping of the components, resulting in great economic losses

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