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Large-volume high-strength concrete

A concrete and high-strength technology, applied in clay preparation devices, cement mixing devices, ceramic molding machines, etc., can solve the problems of poor concrete bearing capacity and impact performance, and achieve excellent impact resistance, excellent impermeability, and high strength Effect

Pending Publication Date: 2022-01-07
CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a large-volume high-strength concrete, which has excellent impact resistance and can meet the needs of structures such as bridges, roads, dams, and tunnels with relatively large impact loads; to solve the problem of concrete in the prior art Poor bearing capacity and impact performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A high-volume high-strength concrete comprising raw materials with the following weight components:

[0037] Cement 400~450kg / m 3 , sand 620~660kg / m 3 , gravel 1000~1050kg / m 3 , mineral powder 65~70kg / m 3 , fly ash 54~58kg / m 3 .

[0038] On the basis of cement, sand, gravel, and water, add mineral powder and fly ash to reduce the heat of hydration, increase the strength in the later stage, and improve its impermeability and corrosion resistance; moreover, it can improve the workability of the concrete mixture , enhance pumpability, reduce creep, delay the hydration rate of cementitious materials, and prolong the setting time of concrete.

[0039] At the same time, the ratio of each raw material is precisely regulated to give full play to the role and interaction of raw materials and ensure the excellent performance of concrete.

[0040] Further, the raw materials of following weight components are also included:

[0041] Admixture 8.800~9.000kg / m 3 .

[0042] A...

Embodiment 2

[0048] A high-volume high-strength concrete comprising raw materials with the following weight components:

[0049] Cement 434kg / m 3 , sand 645kg / m 3 , gravel 1022kg / m 3 , mineral powder 67kg / m 3 , fly ash 56kg / m 3 .

[0050] Further, the raw materials of following weight components are also included:

[0051] Admixture 8.912kg / m 3 .

[0052] A method for preparing large-volume high-strength concrete, comprising the steps of:

[0053] S1, calculate the mix ratio:

[0054] Check the moisture content of raw materials, and calculate the construction mix ratio matching the current moisture content through the moisture content of raw materials.

[0055] Therefore, maintain high standardization and refinement, and fully guarantee product performance.

[0056] S2, raw material mixing:

[0057] The raw materials are sent to the mixing station, and the mixing station performs mixing according to the ratio.

[0058] Wherein, in raw material mixing, mix in the following order...

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PUM

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Abstract

The invention discloses large-volume high-strength concrete, and belongs to the technical field of building materials. The large-volume high-strength concrete is prepared from the following raw materials in parts by weight: 400 to 450 kg / m<3> of cement, 620 to 660 kg / m<3> of sand, 1000 to 1050 kg / m<3> of stones, 65 to 70 kg / m<3> of mineral powder and 54 to 58 kg / m<3> of coal ash. The concrete has the advantages of high strength, excellent anti-permeability and excellent impact resistance.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a large-volume high-strength concrete. Background technique [0002] The preparation of concrete in the prior art is prepared by mixing cement, sand, stones, water and a water reducing agent. The advantages of such concrete are high compressive strength, easy material acquisition, easy molding, and low price, and can be combined with steel to make various load-bearing components; however, its Achilles' heel is low tensile strength, high brittleness, easy cracking, and poor toughness ; Thereby, reduce the bearing capacity of concrete structure, shorten service life, become the hidden danger of various disaster accidents. In particular, its impact resistance is poor, and it is prone to brittle fracture and falling off under impact load. Contents of the invention [0003] The purpose of the present invention is to propose a large-volume high-strength concrete, which h...

Claims

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Application Information

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IPC IPC(8): C04B28/00B28B11/24B28C5/00
CPCC04B28/00B28C5/003B28B11/245C04B2201/50C04B14/06C04B14/02C04B18/08
Inventor 严克凡骆成生陈丽
Owner CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD