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High-performance self-compacting concrete for rapid repair as well as preparation method and application thereof

A self-compacting concrete, high-performance technology, applied in the field of concrete materials, can solve the problems of slow strength development, low elastic modulus, low durability, poor bonding strength, etc., and achieve high toughness, high impact resistance, high bonding strength. Effect

Inactive Publication Date: 2020-09-25
SHANGHAI MEICHUANG ARCHITECTURAL MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel fiber concrete is characterized by slow strength development (long time to restore traffic), easy shrinkage, and poor bond strength. Anti-bending, anti-shock, anti-split properties, and low elastic modulus, durability, etc., easy to crack, not suitable for structural materials; steel fiber concrete and quick repair mortar are used as bridge expansion device notch concrete, often repaired After a short time, it was damaged again, and it was repaired repeatedly

Method used

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  • High-performance self-compacting concrete for rapid repair as well as preparation method and application thereof
  • High-performance self-compacting concrete for rapid repair as well as preparation method and application thereof
  • High-performance self-compacting concrete for rapid repair as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A rapid repair high-performance self-compacting concrete, the preparation method of which is as follows:

[0026] Table 1. Raw material ratio (unit: kg / m3)

[0027]

[0028] Select formula raw material components according to Table 1, wherein, cement is 52.5 grade ordinary Portland cement, special cement is high-strength special cement, gypsum is anhydrous gypsum, mineral powder is grade II, fine aggregate modulus is 2.7mm, coarse Aggregate particle size is 3~16mm, polycarboxylate concrete superplasticizer, VAE emulsion. First select raw materials according to the above-mentioned composition and dosage according to the mixing ratio, then use a dry powder mortar mixing system to stir for 3 to 6 minutes to form a homogeneous finished product, and then pass it through a packaging machine to form a bagged final product. When using, add 5-15% water to the dry material, mix the water and dry material evenly with a special mixer to form finished concrete, and pour the fini...

Embodiment 2

[0031] Table 2. Raw material ratio (unit: kg / m 3 )

[0032]

[0033] Select formula raw material components according to Table 2, wherein, cement is 42.5 grade ordinary Portland cement, special cement is high-strength special cement, gypsum is anhydrous gypsum, mineral powder is grade II, fine aggregate modulus is 2.7mm, coarse Aggregate particle size is 3-16mm, polycarboxylate concrete superplasticizer, VAE emulsion, latex powder, etc. can be dispersed. First select raw materials according to the above-mentioned composition and dosage according to the mixing ratio, then use a dry powder mortar mixing system to stir for 3 to 6 minutes to form a homogeneous finished product, and then pass it through a packaging machine to form a bagged final product. When using, add 5-15% water to the dry material, mix the water and dry material evenly with a special mixer to form finished concrete, and pour the finished concrete to the required scene by self-weight method or pumping method...

Embodiment 3

[0036] Table 3. Raw material ratio (unit: kg / m 3 )

[0037]

[0038] Select formula raw material components according to Table 3, wherein, cement is 42.5 grade ordinary portland cement, special cement is 42.5 special cement, gypsum is anhydrite, mineral powder is grade II, fine aggregate modulus is 2.8mm, coarse Aggregate particle size is 3-16mm, polycarboxylate concrete superplasticizer, VAE emulsion, latex powder, etc. can be dispersed. First select raw materials according to the above-mentioned composition and dosage according to the mixing ratio, then use a dry powder mortar mixing system to stir for 3 to 6 minutes to form a homogeneous finished product, and then pass it through a packaging machine to form a bagged final product. When using, add 5-15% water to the dry material, mix the water and dry material evenly with a special mixer to form finished concrete, and pour the finished concrete to the required scene by self-weight method or pumping method, and complete t...

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Abstract

The invention discloses a high-performance self-compacting concrete for rapid repair as well as a preparation method and application thereof, and belongs to the field of concrete materials. The high-performance self-compacting concrete is prepared by mixing and homogenizing special cement, cement, fly ash, mineral powder, gypsum, coarse aggregate, fine aggregate, a polycarboxylic acid concrete water reducer and VAE emulsion. The concrete is used as bridge expansion joint concrete, section thickening concrete or concrete under the conditions of narrow space and dynamic load, has the characteristics of super early strength, no shrinkage, high wear resistance, high adhesion, high toughness, high impact resistance, high durability and high workability, and effectively fills up the blank of theconcrete raw material industry.

Description

technical field [0001] The invention belongs to the technical field of concrete materials, and in particular relates to a rapid repair high-performance self-compacting concrete and a preparation method and application thereof. Background technique [0002] With the acceleration of the development of bridge traffic in our country and the continuous improvement of bridge construction technology, bridge expansion devices have become an important part of bridges. The bridge expansion device should be able to adapt to the shrinkage of the bridge due to temperature stress, so that the vehicles can drive comfortably. The notch concrete of the bridge expansion device has been subjected to repeated temperature loads, vehicle impact loads and vehicle tire friction for a long time. The notch concrete of the bridge expansion device is easily damaged, which will cause damage to the bridge expansion device. However, the time left for construction in the replacement process of the bridge ...

Claims

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Application Information

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IPC IPC(8): C04B28/16C04B111/72
CPCC04B28/16C04B2111/72C04B2201/50C04B24/2623C04B18/12C04B7/02C04B14/068C04B14/06C04B18/0481C04B2103/302C04B14/14C04B7/32C04B14/00C04B14/04
Inventor 徐凯张晓峰吴中鑫
Owner SHANGHAI MEICHUANG ARCHITECTURAL MATERIALS
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