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Rapid structural strengthening material taking steel slag as aggregate

A technology for reinforcing materials and steel slag, applied in the field of rapid structural reinforcement materials, can solve the problems of low bond strength of new and old concrete, comprehensive utilization rate of less than 15%, narrow material selection range, etc., and achieves excellent workability and constructability, high Environmental benefits and social benefits, the effect of rapid development of intensity

Inactive Publication Date: 2011-10-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some problems with traditional cement-based reinforcement materials: (1) The preparation process is complicated and energy consumption is large; (2) Most of them use non-renewable natural resources, and the material selection range is narrow; (3) The reinforcement maintenance period is long, and the old and new concrete are bonded together. Low strength and poor durability; (4) The construction technology is strict, especially in rainy and snowy days
A large amount of steel slag accumulation not only occupies land, but also a great waste of resources
At present, a small amount of steel slag is used in the production of steel slag cement and as backfill for building ground, but most of it is still abandoned in rivers and piled up in farmland, causing environmental pollution and waste of resources, and its comprehensive utilization rate is less than 15%.

Method used

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  • Rapid structural strengthening material taking steel slag as aggregate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1, a rapid structural reinforcement material using steel slag as aggregate, according to 42.5 grade sulfoaluminate cement 100, steel slag 100, S75 slag powder 10, fly ash 5, calcined kaolin 3, latex powder 1, cellulose Ether 0.01, defoamer 0.02, polycarboxylate water reducer 0.05 weight ratio prepared. According to 10% of the total weight of the reinforcement material, add water and stir evenly to obtain the desired product. The performance test results are shown in Table 1.

Embodiment 2

[0046] Example 2, a rapid structural reinforcement material using steel slag as aggregate, according to 52.5 grade sulphoaluminate cement 100, steel slag 400, S95 slag powder 45, fly ash 35, calcined kaolin 15, latex powder 4, cellulose Ether 0.15, defoamer 0.15, naphthalene-based water reducer 3.00 weight ratio prepared. According to 25% of the total weight of the reinforcement material, add water and stir evenly to obtain the desired product. The performance test results are shown in Table 1.

Embodiment 3

[0047] Example 3, a rapid structural reinforcement material using steel slag as aggregate, according to 52.5 grade sulphoaluminate cement 100, steel slag 350, S95 slag powder 35, fly ash 20, calcined kaolin 6, latex powder 3, cellulose Ether 0.10, defoamer 0.06, polycarboxylate water reducer 0.20 weight ratio prepared. According to 18% of the total weight of the reinforcement material, add water and stir evenly to obtain the desired product. The performance test results are shown in Table 1.

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Abstract

The invention belongs to the technical field of construction materials, and particularly relates to a rapid structural strengthening material taking steel slag as aggregate. The rapid structural strengthening material consists of sulphate aluminium cement, steel slag, slag powder, pulverized fuel ash, calcined kaolin, emulsion powder, cellulose ether, an anti-forming agent and a water reducing agent, wherein the steel slag is thermally-stewed or aged steel slag of which the basicity coefficient is not less than 1.6. Due to the adoption of the rapid structural strengthening material, the problems of high energy consumption, long wet construction time and poor durability of the ordinary cement-based strengthening material can be solved, and the material cost and the construction cost can be saved. The rapid structural strengthening material can be used by adding water into a compound gelled material, steel slag aggregate and a compound additive and stirring on site, has the characteristics of high workability, fast developed strength, high mechanical property, high durability, small contraction rate and the like, and is suitable for strengthening projects of various buildings, bridges and large dams.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a rapid structural reinforcement material using steel slag as aggregate. Background technique [0002] Since the 1950s, the subject of reinforcement has developed very rapidly in my country, and has achieved great results in a large number of engineering practices such as seismic reinforcement of concrete structures, renovation of dilapidated buildings, and engineering accident handling. The reasons why concrete structures in my country need to be strengthened mainly include the following aspects: (1) The basic design data and design methods are unscientific, resulting in safety problems in the designed buildings; (2) Due to wrong construction methods, poor construction management and The construction unit cut corners and other reasons, resulting in quality problems in the building; (3) Due to the impact of high-humidity acid-base environment, temperature difference, fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/36C04B18/14
CPCC04B20/04C04B28/06C04B2103/302Y02W30/91C04B14/106C04B18/08C04B18/141C04B18/142C04B20/0076C04B24/26C04B24/383C04B40/0028C04B2103/50C04B24/226C04B24/2641C04B20/026
Inventor 孙振平杨洁庞敏
Owner TONGJI UNIV
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