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Special concrete material and preparation method and application thereof

A concrete and special technology, applied in bridge materials, on-site coagulation pavement, pavement details, etc., can solve the problem of mechanical properties without bending resistance, impact resistance, anti-splitting resistance, slow opening to traffic, slow strength development, etc. question

Inactive Publication Date: 2020-09-18
SHANGHAI MEICHUANG ARCHITECTURAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Self-compacting concrete is characterized by slow strength development, slow opening to traffic, easy shrinkage, poor bond strength, poor impact toughness and fatigue resistance; quick repair mortar belongs to mortar products, and does not have the required bending resistance, impact resistance, The mechanical properties of concrete such as split resistance, elastic modulus, and durability are not suitable for structural materials; parts repaired with self-compacting concrete and quick-repair mortar are often damaged in a short time after repair, and repeated repairs

Method used

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  • Special concrete material and preparation method and application thereof
  • Special concrete material and preparation method and application thereof
  • Special concrete material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of special concrete material, its preparation method is as follows:

[0029] Table 1. Raw material ratio (unit: kg / m 3 )

[0030]

[0031] 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 anhydrite, fly ash, mineral powder is grade II, and fine aggregate modulus is 2.7mm, the particle size of coarse aggregate is 3-16mm, polycarboxylate high-efficiency water reducer, functional additives include retarder, thickener and water-retaining agent, dispersible latex powder, etc. 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 dr...

Embodiment 2

[0034] Table 2. Raw material ratio (unit: kg / m 3 )

[0035]

[0036] 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 anhydrite, fly ash, mineral powder is grade II, fine aggregate modulus is 2.7mm, the particle size of coarse aggregate is 3-16mm, the polycarboxylate is Shanghai Sanrui polycarboxylate high-efficiency superplasticizer, and the functional additives include retarder, thickening and water-retaining agent, which can be dispersed in latex powder, etc. According to the above composition and dosage, select raw materials according to the mixing ratio, and then use a dry powder mortar mixing system to stir for 3 to 6 minutes to form a homogeneous finished product, and then pass 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...

Embodiment 3

[0039] Table 3. Raw material ratio (unit: kg / m 3 )

[0040]

[0041] 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, fly ash, mineral powder is grade II, fine aggregate modulus is 2.8mm, the particle size of coarse aggregate is 3-16mm, polycarboxylate high-efficiency water reducer, functional additives include retarder, thickener and water-retaining agent, which can be dispersed in latex powder, etc. 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 finis...

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Abstract

The invention discloses a special concrete material and a preparation method and application thereof and belongs to the field of concrete materials. The special concrete material is prepared by mixingand homogenizing special cement, cement, fly ash, mineral powder, gypsum, coarse aggregate, fine aggregate, a polymer additive and a functional additive. The special concrete material is used as bridge expansion joint concrete, section thickened 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 the concrete raw material industry.

Description

technical field [0001] The invention belongs to the technical field of concrete materials, and in particular relates to a special concrete material and its preparation method and application. Background technique [0002] With the further acceleration of the urbanization process in our country, the construction technology of expressways, urban elevated roads, urban roads, and airports has been continuously improved. On the expressway pavement, urban elevated road expansion joints; urban roads, airport runways, etc., the traffic is heavy and the frequency of use is high. The quick repair laying of the parts has become an important technical node, because the quick repair parts directly bear the repeated action of the vehicle load, are exposed to the ground, and are affected by various natural factors, therefore, the quick repair materials for the above parts The choice is very important. [0003] Currently, self-compacting concrete and rapid repair mortar are mainly used for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/16E01D19/12E01D19/06E01C7/14E01C11/04E01D101/24C04B111/34
CPCE01D19/125E01D19/06E01C7/147E01C11/04C04B28/16E01D2101/24C04B2201/50C04B2111/343
Inventor 徐凯
Owner SHANGHAI MEICHUANG ARCHITECTURAL MATERIALS
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