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High-strength concrete formula and preparation method of high-strength concrete formula

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 permeability resistance, stable volume and good durability.

Inactive Publication Date: 2012-09-26
LANGFANG RONGSHENG CONCRETE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no report of 280MPa ~ 300MPa high strength concrete

Method used

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  • High-strength concrete formula and preparation method of high-strength concrete formula
  • High-strength concrete formula and preparation method of high-strength concrete formula

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 4.8Kg of commercially available ordinary Portland cement, 0.5Kg of micron coal fly ash, 0.68Kg of fine sand with a particle diameter of less than 0.25mm, 2.68Kg of medium sand with a particle diameter of 0.25-1mm, 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 and 0.2Kg of tea saponin foaming agent into the mixer and stir for 5 minutes, then add 0.15Kg of commercially available water reducer and Mix 0.36Kg of water in the dissolver and add it to the mixer. At the same time, rinse the container for preparing the water reducer with 0.12Kg of water. Add the rinsed liquid to the mixer, stir the mixture until it becomes viscous, and vibrate it with a standard concrete test mold. Formed and cured for 28 days under standard conditions, the compressive strength is 285 ± 5MPa.

Embodiment 2

[0027] 6.33Kg of white cement, 0.5Kg of micron coal fly ash, 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 mixer and dry mix for 5 minutes, then add 0.81Kg of water and 0.2kg of saponin type foaming agent into the mixer and stir for 5 minutes, mix 0.69Kg of commercially available water reducer and 0.405Kg of Mix the water in the container and add it to the mixer. At the same time, rinse the container for preparing the water reducer with the remaining 0.081Kg of water. The rinsed liquid is added to the mixer, and the mixture is stirred until it becomes viscous. The standard concrete test mold is used for vibration molding. After 28 days of curing under the same conditions, the compressive strength is 290±5MPa.

Embodiment 3

[0029] 6.33Kg of low-alkali sulfate-resistant cement, 0.5Kg of micron coal fly ash, 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, and coarse sand with a particle diameter of 1-4mm 9.69Kg and 2.43Kg of ultra-fine fly ash nanopowder were placed in a mixer for 5 minutes, then 0.81Kg of water and 0.2kg of saponin-type foaming agent were added to the mixer and stirred for 5 minutes, and 0.69Kg of commercially available water reducer Mix with 0.405Kg of water in the container and add to the mixer, and at the same time rinse the container for preparing the water reducer with the remaining 0.081Kg of water, add the rinsed liquid to the mixer, stir the mixture until it becomes viscous, and vibrate with a standard concrete test mold Formed, after 28 days of curing under standard conditions, the compressive strength is 295 ± 5MPa.

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Abstract

The invention discloses a high-strength concrete formula. The high-strength concrete formula is characterized by comprising the following constituents by weight: 20-40% of cement, 3-5% of pulverized coal ash, 30-50% of fine aggregate, 20-40% of coarse aggregate, 3-5% of plant protein foaming agent, 1-10% of water reducer and 1-10% of water. Above materials are mixed and uniformly stirred to obtain the concrete. The concrete disclosed by the invention has the advantages of fewer holes in interior of the concrete, compact microstructure and meso-level structure and excellent anti-permeability performance by mutual interaction of various ingredients, so that the high-performance concrete is good in durability, and the strength can be up to over 280MPa.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a high-strength concrete formula with a compressive strength of 280MPa-300MPa and a preparation method thereof. Background technique [0002] There is no accurate definition of high-strength concrete in various countries, and the standards for different countries are also different. For a long time, the strength grade of cast-in-place concrete in our country is much lower than C30, and the precast concrete members are generally lower than C40: at the same time, most of the calculation formulas in the concrete structure design code are based on the test data of lower-strength concrete members. For higher strength C50 or Higher grades of concrete are clearly not suitable. In addition, from the perspective of concrete production technology, C50 and higher grades of concrete require strict quality management systems and high construction levels during construction. Con...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/04C04B28/00
Inventor 姚亮张永
Owner LANGFANG RONGSHENG CONCRETE