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High-strength concrete formula and preparation method thereof

A concrete and high-strength technology, applied in the field of building materials, can solve problems such as high-strength concrete that has not yet been seen, and achieve the effects of strong penetration resistance, simple preparation method and strong corrosion resistance.

Inactive Publication Date: 2011-01-05
常州华钛化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no reports of 125MPa-270MPa high-strength concrete have been seen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Commercially available ordinary Portland cement 4.8Kg, wollastonite nano powder 1.59Kg, fine sand with a particle diameter of less than 0.25mm 0.68Kg, medium sand with a particle diameter of 0.25-1mm 2.68Kg, and coarse sand with a particle diameter of 1-4mm 6.78Kg and 13.8Kg dry materials of stones less than 16mm, put them into the mixer for 5 minutes, add 0.72Kg of water to the mixer and stir for 5 minutes, then mix 0.15Kg of commercially available water reducer and 0.36Kg of water in the solvent After uniformity, add it to the mixer, and rinse the container for preparing the water reducer with 0.12Kg of water at the same time, add the rinsed liquid to the mixer, stir the mixture until it becomes viscous, use standard concrete test mold vibration molding, and maintain it under standard conditions for 28 days. , The compressive strength is 125±5MPa.

Embodiment 2

[0027] 6.33Kg of white cement, 2.25Kg of wollastonite nano powder, 2.67Kg of fine sand with a particle diameter of <0.25mm, 4.83Kg of medium sand with a particle diameter of 0.25-1mm, 9.69Kg of coarse sand with a particle diameter of 1-4mm, super Put 2.43Kg of fine fly ash nanopowder into the blender and dry mix for 5 minutes, then add 0.81Kg of water into the blender and stir for 5 minutes, mix 0.69Kg of commercially available water reducer and 0.405Kg of water in the container and add to the blender. The remaining 0.081Kg of water was used to wash the container for preparing the water reducer, and the rinsed liquid was added to the mixer, and the mixture was stirred until it became viscous. The standard concrete test mold was used for vibration molding. After 28 days of curing under standard conditions, the compressive strength was 160. ±5MPa.

Embodiment 3

[0029] Dry 9.27Kg of white cement, 2.22Kg of wollastonite nanopowder, 2.37Kg of fine sand with a particle diameter of <0.25mm, 4.71Kg of medium sand with a particle diameter of 0.25-1mm, and 9.45Kg of coarse sand with a particle diameter of 1-4mm. Put the material into the mixer and dry mix for 5 minutes, add 0.792Kg of water into the mixer and stir for 5 minutes, mix 0.66Kg of commercially available water reducer and 0.396Kg of water in the container, add to the mixer, and rinse with the remaining 0.0792Kg of water Prepare the container of water reducer, add the rinsed liquid into the mixer, stir the mixture until it becomes viscous, and use standard concrete test mold vibration molding. After 28 days of curing under standard conditions, the compressive strength is 170±6MPa.

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Abstract

The invention relates to a high-strength concrete and a preparation method thereof. The high-strength concrete formula is characterized by comprising the following raw materials in percentage by weight: 10-40 percent of cement, 1-10 percent of mineral powder, 10-65 percent of fine aggregate, 0-50 percent of rough aggregate, 1-10 percent of water reducing agent and 1-10 percent of water. The preparation method comprises the following steps of: putting all dry materials into a stirrer by the proportion and dry-mixing for 5-10min; adding water accounts for 60 percent in the total water weight into the stirrer and mixing the materials for 5-10min; uniformly mixing the water reducing agent and water accounts for accounting 30 percent in the total water weight and adding an obtained mixture into the stirrer; washing a container used for preparing the water reducing agent by using water accounts for accounting 10 percent in the total water weight, and adding liquid after washing into the stirrer; and stirring the mixture until the mixture is in a viscous state. By adopting the formula and the preparation method, the high-strength concrete with the compression strength of 125-270MPa is prepared, and different compression strengths are achieved through changing the grain size of the fine and rough aggregates, the type and the proportion of the cement. The high-strength concrete can be widely applied to high-strength construction of modern requirements.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a high-strength concrete formula with a compressive strength of 125MPa-270MPa and a preparation method thereof. Background technique [0002] In the past 20 or 30 years, concrete has been developing in the direction of rapid hardening, high strength, light weight, modification, compounding, and energy saving. As a new building material, high-strength concrete has been widely used in high-rise building structures, long-span bridge structures and some special structures due to its advantages of high compressive strength, strong deformation resistance, high density and low porosity. application. The biggest feature of high-strength concrete is its high compressive strength, which is generally 4 to 6 times that of ordinary strength concrete, so it is most suitable for high-rise buildings. In addition, taking advantage of the high density of high-strength concrete, it can be used t...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04
Inventor 徐俊伟马国庆黄建孙启梅
Owner 常州华钛化学有限公司
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