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Composite synergist and sleeve grouting material for steel bar connection and preparation method thereof

A composite synergistic and sleeve grouting technology, applied in the field of building materials, can solve the problems of failing to meet the requirements of mechanical properties, difficult to meet the requirements of high flow state, fast setting speed, etc., to achieve excellent pull-out resistance, improve Mechanical properties, anti-erosion effect

Active Publication Date: 2021-09-07
SINOMA SUZHOU CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working performance of steel sleeve grouting material is closely related to the external temperature and environmental conditions. Under the condition of high temperature, whether it is Portland cement or sulphoaluminate cement as the cementitious material, the setting speed is fast, and it is difficult to meet the high flow rate. If the flow state is only changed by adding retarder, it will lead to low early strength and fail to meet the requirements of mechanical properties.

Method used

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  • Composite synergist and sleeve grouting material for steel bar connection and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: A composite synergist, the composite synergist is composed of the following components: 31% modified ultrafine steel slag powder, 53% ultrafine slag powder, 6% fly ash, 3.5% desulfurized gypsum, composite expansion 2% additive, 0.1% graphene oxide, 2.4% rust inhibitor, 1% stabilizer and 1% composite fiber.

[0031] The composite synergist is mixed with the grouting reference material to prepare the sleeve grouting material for steel bar connection. The composition of the components mixed in weight percentage is as follows: 14% composite synergist, 36% cement, 49.6% aggregate, defoaming Agent 0.02%, polycarboxylate superplasticizer 0.3% and composite early strength agent 0.08%.

Embodiment 2

[0032] Embodiment 2: A composite synergist, the composite synergist consists of the following components: 32% modified ultrafine steel slag powder, 52% ultrafine slag powder, 7% fly ash, 3.5% desulfurized gypsum, composite expansion 2% additive, 0.1% graphene oxide, 1.4% rust inhibitor, 1% stabilizer and 1% composite fiber.

[0033] The composite synergist is mixed with the grouting reference material to prepare the sleeve grouting material for steel bar connection. The composition of the components mixed in weight percentage is as follows: 12% composite synergist, 37.42% cement, 50% aggregate, defoaming 0.06% agent, 0.4% polycarboxylate superplasticizer and 0.12% composite early strength agent.

Embodiment 3

[0034] Embodiment 3: A composite synergist, the composite synergist consists of the following components: 33% modified ultrafine steel slag powder, 53.8% ultrafine slag powder, 5% fly ash, 3% desulfurized gypsum, composite expansion agent 1.8%, graphene oxide 0.05%, rust inhibitor 1.5%, stabilizer 0.9% and composite fiber 0.95%.

[0035] The composite synergist is mixed with the grouting reference material to prepare the sleeve grouting material for steel bar connection. The composition of the components mixed in weight percentage is as follows: 12.5% ​​of the composite synergist, 37.5% of the cement, 49.57% of the aggregate, and 0.04% agent, 0.3% polycarboxylate superplasticizer and 0.09% composite early strength agent.

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Abstract

The invention discloses a composite synergist, a sleeve grouting material for steel bar connection and a preparation method thereof, comprising modified superfine steel slag powder 27%-33%, ultrafine slag powder 50%-55%, and fly ash 4%- 7%, desulfurized gypsum 1.5%‑3.5%, composite expansion agent 1%‑2%, graphene oxide 0.05%‑0.1%, rust inhibitor 1.4%‑2.4%, stabilizer 0.5%‑1%, composite fiber 0.5‑ 1%, cement 35‑38%, aggregate 47‑50%, defoamer 0.02%‑0.065%, polycarboxylate superplasticizer 0.3%‑0.5% and composite early strength agent 0.08%‑0.12%. Through the above method, the composite synergist of the present invention is mixed with the grouting reference material to obtain the characteristics of high fluidity, high strength, and strong corrosion resistance of the steel sleeve grouting material. The operation is simple and the work performance is excellent. After grouting, the steel bar and the Sleeves form a strong bond with good durability.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a sleeve grouting material for steel bar connection. Background technique [0002] Compared with the cast-in-place concrete building structure, the prefabricated concrete building structure has the advantages of high efficiency, low energy consumption and low environmental pollution, which is in line with the national sustainable development strategy and requirements. In the current era of vigorously advocating energy conservation and environmental protection, prefabricated concrete building structure technology has achieved rapid development, and it can be expected that it will gradually replace traditional cast-in-place structures in the future and occupy a dominant position. Due to the characteristics of convenient operation, safety and reliability, excellent mechanical properties and stable structure, the steel sleeve connection method has become the main method of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B28/04C04B111/70
Inventor 王俊勇金涛岳艳超陈静
Owner SINOMA SUZHOU CONSTR
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