Non-cement-based inorganic anchoring bonded bar adhesive and preparation method thereof

Abstract

The invention discloses a non-cement-based inorganic anchoring bonded bar adhesive and a preparation method thereof. The preparation method of the non-cement-based inorganic anchoring bonded bar adhesive disclosed by the invention comprises the following steps of: uniformly mixing one or several kinds of powder of slag powder, metakaolin powder, coal ash, coarse calcium powder, quartz sand, a swelling agent and the like; mixing a sodium silicate solution, a sodium phosphate solution, a sodium hydroxide solution, water and the like into emulsion; and weighing threes parts of bonded bar adhesive powder and one part of the emulsion in terms of weight part, and uniformly mixing to prepare the non-cement-based inorganic anchoring bonded bar adhesive. The non-cement-based inorganic anchoring bonded bar adhesive disclosed by the invention has the advantages of early strength, high strength, stable volume, good durability, high-temperature resistance, large bond stress to reinforcing steel bars, high anchoring strength, seismic resistance, impact resistance and favorable fatigue resistance, and can be widely applied to surrounding rock anchoring for engineering, equipment foundation bar bonding, building structure bar bonding, reinforcing steel bar anchoring for water conservancy, hydropower, roads, bridges, tunnels and other projects, and the like.

Description

technical field [0001] The invention relates to an anchoring material for construction, in particular to a non-cement based inorganic anchoring glue and a preparation method thereof. Background technique [0002] Anchor planting glue belongs to building structure glue, and anchoring planting glue can be divided into organic type planting glue and inorganic type planting glue in terms of material composition. At present, the commonly used planting glue on the market is organic planting glue. [0003] At present, there are two types of organic type planting adhesives commonly used, one is epoxy resin type planting adhesive represented by JGN building structural adhesive, and the other is polyurethane represented by Hilti series structural adhesive High performance resin glue. Organic planting glue has its remarkable advantages, such as high early strength and mature development, etc., but organic planting glue also has its shortcomings that are difficult to overcome, such as...

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Problems solved by technology

[0004] (1) The elastic modulus of concrete is too different, poor heat and humidity resistance, easy aging, toxicity, high price and other physical and chemical defects;

[0005] (2) The construction conditions are strict and cannot be constructed at too low or too high temperature

It is not easy to solidify at low temperature; it is easy to denature at high temperature, and it is difficult to realize the welding process after planting at the construction site, which increases the difficulty of construction, etc.

[0006] (3) The operating temperature range is narrow, and it cannot be constructed and used at too low or too high temperature

If it is used at low temperature (0°C and below), it is easy to become brittle; if it is used at high temperature (100°C and above) for a long time, it is easy to denature and the mechanical properties will decrease;

[0007] As a result, inorganic type anchoring and planting glue came into being. At present, most of the inorganic type planting glue on the market is cement-based inorganic planting glue. High temperature, no aging, and similar elastic modulus to concrete, etc., but at the same time, there are many obvious defects that hinder the development and engineering application of inorganic planting reinforcement. For example, it takes a long time for inorganic planting reinforcement to reach a certain strength. time; the overall strength of the inorganic-type planting bar glue is not high, and the bond strength between the adhesive bonded steel bar and the substrate concrete under the condition of constrained drawing cannot reach the planting bar specified in GB50367-2006 "Code for Design of Reinforcement of Concrete Structures". The performance requirements of the glue; to achieve the bearing capacity that meets the design requirements, the depth of the cement-based rebar-planting glue should be as large as about 15d, which is basically not applicable when it encounters a concrete wall or concrete slab structure

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