Active powder concrete applicable to road and bridge project

A technology of active powder and concrete, which is applied in the field of building materials, can solve the problems of low added value of products and low overall utilization rate, and achieve the effect of solving the problem of high added value utilization, enriching types, and improving overall performance

Active Publication Date: 2019-03-08
SHANDONG HUAJIAN ENG TESTING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of industrial technology and equipment, steel slag has undergone complex processes such as hot stuffing, iron removal, and grinding. Steel slag powder has been industrialized and has been used in the field of building materials, but the overall utilization rate is low and the added value of the product is not high.

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  • Active powder concrete applicable to road and bridge project

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Effect test

preparation example Construction

[0050] The active powder concrete material prepared by the present invention can effectively adjust the hardening time by rationally deploying various proportioning materials, and reduce the occurrence of cracking caused by too fast hardening of the concrete; at the same time, by controlling the heat of hydration, the internal temperature of the concrete rises The speed slows down, which slows down the temperature cracks caused by the large temperature difference between the inside and outside of the reactive powder concrete; at the same time, it significantly improves the internal fluidity of the concrete, making the internal density of the reactive powder concrete more uniform, and improving the crack resistance while ensuring the mechanical strength of the concrete. performance.

[0051] In yet another specific embodiment of the present invention, the preparation method of above-mentioned active powder concrete material is provided, and described preparation method comprises...

Embodiment 1

[0065] A reactive powder concrete material made of the following components by weight:

[0066] 70 parts of cement, 40 parts of quartz sand, 13 parts of silica fume, 10 parts of steel fiber, 1.5 parts of polycarboxylate superplasticizer, 2 parts of expansion agent, 5 parts of steel slag powder, 1 part of triethanolamine, 19 parts of water, retarder 0.9 servings.

[0067] Wherein, cement is P·O4 2.5 cement;

[0068] The particle size range of the quartz sand is controlled between 0.6-1.0mm, wherein the mass ratio of the 0.6-0.8mm-sized quartz sand to the 0.8-1.0mm-sized quartz sand is 1:2.5;

[0069] The silica fume is a by-product of ferrosilicon smelting or industrial silicon production, with an average particle size of 0.1-0.2 μm and a specific surface area of ​​15-25 m 2 / g;

[0070] The diameter of the steel fiber is 0.18-0.25mm, and the length is 10-15mm;

[0071] The polycarboxylic acid superplasticizer has a water reducing rate higher than 30%;

[0072] The expansi...

Embodiment 2

[0080] A reactive powder concrete material made of the following components by weight:

[0081] 65 parts of cement, 45 parts of quartz sand, 12 parts of silica fume, 10 parts of steel fiber, 2 parts of polycarboxylate superplasticizer, 2 parts of expansion agent, 4 parts of steel slag powder, 1 part of triethanolamine, 20 parts of water, retarder 1.2 servings.

[0082] Wherein, cement is P·O4 2.5 cement;

[0083] The particle size range of the quartz sand is controlled between 0.6-1.0mm, wherein the mass ratio of the 0.6-0.8mm-sized quartz sand to the 0.8-1.0mm-sized quartz sand is 1:2;

[0084] The silica fume is a by-product of ferrosilicon smelting or industrial silicon production, with an average particle size of 0.1-0.2 μm and a specific surface area of ​​15-25 m 2 / g;

[0085] The diameter of the steel fiber is 0.18-0.25mm, and the length is 10-15mm;

[0086] The polycarboxylic acid superplasticizer has a water reducing rate higher than 30%;

[0087] The expansion a...

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Abstract

The invention provides active powder concrete applicable to a road and bridge project and belongs to the technical field of building materials. The active powder concrete is prepared from the following raw materials in parts by weight: 60 to 75 parts of cement, 40 to 50 parts of quartz sand, 12 to 15 parts of silicon ash, 8 to 15 parts of steel fiber, 1.5 to 2.5 parts of a polycarboxylic acid water reducer, 2 to 3 parts of an expanding agent, 4 to 6 parts of steel slag micro-powder, 1 to 1.5 parts of triethanolamine, 18 to 20 parts of water and 0.8 to 1.2 parts of a set retarder. The active powder concrete prepared by the invention has good controllability, good economical efficiency and no shrinkage or cracking, and has good bending strength and compression strength; meanwhile, the problem of high-addition-value utilization of steel slag is effectively solved, and the active powder concrete has good actual application value.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an active powder concrete suitable for road and bridge projects. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the continuous advancement of road and bridge engineering technology, the requirements for concrete in the field of building materials are getting higher and higher. As a new type of building material, reactive powder concrete has excellent properties such as ultra-high strength, high toughness and high durability. It is difficult to replace conventional concrete. Reactive powder concrete is mainly made of cement as the cementitious mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017C04B2201/50C04B14/06C04B18/146C04B14/48C04B2103/302C04B18/142C04B24/122C04B2103/22C04B22/142
Inventor 李义凯卓秋林任士朴马建商淑杰高建军梁奎基张思峰李光华齐辉马良臧亚囡盛园园张明祥
Owner SHANDONG HUAJIAN ENG TESTING CO LTD
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