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Concrete and preparation method thereof

A concrete and mixture technology, applied in the field of concrete and its preparation, can solve the problems of poor concrete performance and achieve the effects of improved impact resistance, simple operation, and high crack resistance

Active Publication Date: 2012-06-20
黄贺明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a kind of concrete, solves the technical problem of poor concrete performance in the prior art

Method used

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  • Concrete and preparation method thereof
  • Concrete and preparation method thereof
  • Concrete and preparation method thereof

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preparation example Construction

[0060] see figure 1 , figure 1 Show the concrete preparation method flowchart of the embodiment of the present invention, comprise the steps:

[0061] Step S01, providing raw materials:

[0062] Take the following components:

[0063] cementitious material,

[0064] River sand, the mass ratio of the river sand to the cementitious material is 1~1.3:1,

[0065] Water, the mass ratio of described water and gelling material is 0.12~0.22: 1,

[0066] superplasticizer, the mass ratio of the superplasticizer to the gelling material is 0.006~0.08:1,

[0067] mixed graded steel fibers, the volume ratio of the steel fibers to the concrete is 0.005-0.03:1,

[0068] Mixed and graded polypropylene fibers, the volume ratio of the polypropylene fibers to the concrete is 0.0015-0.012:1;

[0069] Step S02, preparing the first mixture:

[0070] mixing the river sand, steel fibers, and polypropylene fibers to obtain a first mixture;

[0071] Step S03, preparing the second mixture:

[0...

Embodiment 1

[0116] The proportion of the modified active powder concrete of the embodiment of the present invention, which is environmentally friendly, cost-effective and multi-graded is as follows:

[0117] Concrete material (cement and multi-gradation composite material) dosage: cement (P.O 42.5) 525kg, silica fume: 105kg, fly ash: 126kg, 95 grade slag powder: 126kg, limestone powder: 105, superfine slag powder: 84kg

[0118] The mass of river sand with particle size up to 1.25mm continuous gradation: 1258kg

[0119] Mixed steel fiber (volume ratio, accounting for the total volume ratio of concrete): copper-plated steel fiber 105kg, end-hook steel fiber 52.5kg.

[0120] Mixed polypropylene fiber (accounting for concrete volume percentage): fine polypropylene fiber 1.12kg, coarse polypropylene fiber 8kg

[0121] Superplasticizer: 21kg

[0122] Water quality: 156kg

[0123] The preparation method of the modified active powder concrete with environmental protection, high cost performanc...

Embodiment 2

[0131] The proportion of an environmentally friendly, cost-effective and multi-graded modified active powder concrete is as follows:

[0132] Concrete material (cement and multi-component graded composite material) dosage: cement (P.O42.5) 420kg, silica fume: 105kg, fly ash: 52.5kg, 95 grade slag powder: 105kg, limestone powder 210kg Fine slag powder: 157kg

[0133] Aggregate is continuous graded river sand with particle size up to 1.25mm: 1258kg

[0134] Mixed steel fiber (volume ratio, accounting for the total volume ratio of concrete): copper-plated steel fiber 78.5kg, end-hook steel fiber 78.5kg.

[0135] Mixed polypropylene fiber (accounting for concrete volume percentage): fine polypropylene fiber 1.45kg, coarse polypropylene fiber 9.3kg

[0136] Superplasticizer: 21kg

[0137] Water-binder ratio: 176.5kg

[0138] The preparation method of the modified active powder concrete with environmental protection, high cost performance and multi-gradation in the embodiment of...

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Abstract

The invention is applicable to the technical field of building materials, and provides a concrete and a preparation method of the concrete. The concrete comprises a cementing material, river sands, a super plasticizer, water, steel fibers and polypropylene fibers. The concrete of the invention has a gradation synergetic effect by utilizing mixed graded steel fibers, so as to greatly improve compressive strength and bending strength, crack resistance and impact resistance of concrete; and the concrete overcomes early-stage microcrack problem of concrete via fine polypropylene fibers, and mainly improves toughness of concrete via coarse polypropylene fibers, so as to realize the advantages of concrete such as high compressive strength and bending strength, high crack resistance, and good durability. The concrete preparation method is easy in operation and low in cost, and is very suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to concrete and a preparation method thereof. Background technique [0002] The traditional active powder concrete (Reactive Power Concrete, RPC for short) is composed of cement, quartz sand, silica fume, quartz powder, steel fiber and high-efficiency water reducing agent. concrete. Due to the high price of silica fume, quartz powder and quartz sand used, the cost of reactive powder concrete is high, which hinders the popularization and application of reactive powder concrete. [0003] At present, a large number of single-doped copper-plated steel fibers are used to improve the compressive strength and flexural strength of concrete, effectively limit the occurrence of concrete cracks, and greatly improve the performance of concrete, but the engineering application of high-volume steel fibers is restricted by economic benefits. . [0004] Mono-mixed polyprop...

Claims

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Application Information

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IPC IPC(8): C04B28/02
Inventor 黄贺明李华锋
Owner 黄贺明
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