Recycled high-performance concrete and preparation method thereof

A recycled concrete, high-performance technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of mortar brittleness and cracks, and achieve high durability, good work performance and durability, obvious environmental effects

Inactive Publication Date: 2015-03-25
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these reinforcing materials have improved the overall strength and toughness of the mortar, this toughness comes from the reinforcing materia

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The proportion of each component of concrete is as follows:

[0031] Cement: 380 kg (42.5 Portland cement)

[0032] Water: 212kg

[0033] Fly ash: 65 kg

[0034] Aluminum slag: 30 kg

[0035] Yellow sand: 630 kg (medium sand)

[0036] Recycled coarse aggregate: 1150 kg

[0037] Admixture: 16 kg

[0038] Graphene: 0.08 kg

[0039] Spray water on the recycled coarse aggregate at the raw material yard until the saturated surface is dry, then after the moisture on the surface is dried, use the measuring equipment to weigh the natural sand, natural coarse aggregate, recycled coarse aggregate and The components of cement, fly ash and aluminum slag are poured into the mixer in turn and stirred, and finally water, graphene and admixture are added (graphene and admixture are dissolved in water), and the stirring time is not less than 2 minutes.

[0040] The performance of the stirred mixture was tested according to "Standards for Test Methods of Mechanical Properties of O...

Embodiment 2

[0048] The proportion of each component of concrete is as follows:

[0049] Cement: 360 kg (42.5 Portland cement)

[0050] Water: 205kg

[0051] Fly ash: 90 kg

[0052] Aluminum slag: 25 kg

[0053] Yellow sand: 650 kg (medium sand)

[0054] Recycled coarse aggregate: 1150 kg

[0055] Admixture: 13 kg

[0056] Graphene: 0.08 kg

[0057] Spray water on the recycled coarse aggregate at the raw material yard until the saturated surface is dry, then after the moisture on the surface is dried, use the measuring equipment to weigh the natural sand, natural coarse aggregate, recycled coarse aggregate and The components of cement, fly ash and aluminum slag are poured into the mixer in turn and stirred, and finally water, graphene and admixture are added (graphene and admixture are dissolved in water), and the stirring time is not less than 2 minutes.

[0058] The materials were configured according to the above proportions and their performance was tested according to the "Stan...

Embodiment 3

[0066] The proportion of each component of concrete is as follows:

[0067] Cement: 340 kg (42.5 Portland cement)

[0068] Water: 205kg

[0069] Fly ash: 90 kg

[0070] Aluminum slag: 25 kg

[0071] Yellow sand: 680 kg (medium sand)

[0072] Recycled coarse aggregate: 1120 kg

[0073] Admixture: 11 kg

[0074] Graphene: 0.07 kg

[0075] Spray water on the recycled coarse aggregate at the raw material yard until the saturated surface is dry, then after the moisture on the surface is dried, use the measuring equipment to weigh the natural sand, natural coarse aggregate, recycled coarse aggregate and The components of cement, fly ash and aluminum slag are poured into the mixer in turn and stirred, and finally water, graphene and admixture are added (graphene and admixture are dissolved in water), and the stirring time is not less than 2 minutes.

[0076] The materials were configured according to the above proportions and their performance was tested according to the "Stan...

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Abstract

The invention relates to recycled high-performance concrete and a preparation method thereof. The recycled high-performance concrete is prepared from recycled coarse aggregates, made from crushed construction waste, as a raw main raw material, and added with natural sand, cement, coal ash, aluminum dross, an admixture, graphene and water in a stirring manner. According to the preparation method, a micropore of a cement-based composite material is filled with a nanometer material, namely graphene, so that the effects of reinforcing, toughening, and reducing the shrinkage are achieved. The aluminum dross produced in the electrolytic aluminum production process is adopted as the admixture; and aluminite powder in the aluminum dross expands in water, so as to play a shrinkage-compensating role. The concrete is small in shrinkage besides good working performance, durability and relatively high strength, and can be widely applied to road engineering, structure engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of concrete materials, and in particular relates to a high-performance regenerated concrete whose main raw material is recycled coarse aggregate obtained by crushing construction waste and a preparation method thereof. technical background [0002] According to statistics, the total amount of waste concrete (the sum of waste concrete in the concrete production process, building construction process and building demolition process) is more than 120 million tons of construction waste generated every year in my country. With the further acceleration of my country's economic construction, the total amount of construction waste will increase. Using crushed construction waste as recycled aggregate can not only solve the problem of shortage of natural aggregate resources, but also benefit the environmental protection of aggregate production areas, and can reduce the accumulation of urban waste concrete, occupying l...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04C04B18/16
CPCY02W30/91
Inventor 雷斌饶春华晏育松徐原威易义武
Owner NANCHANG UNIV
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