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A kind of C80 ultra-high pumping concrete and its preparation method

An ultra-high pumping and concrete technology, which is applied in the field of concrete, can solve the problems of low shear strength and reduce the fluidity of concrete, and achieve the effects of enhancing work performance, improving workability, and improving pumpability

Active Publication Date: 2022-05-27
陕西宏基混凝土构件有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The defects in the above technical solutions are: cement, slag powder and other cementitious materials will undergo hydration reaction during mixing with water, which will increase their viscosity and enhance their strength, but the increase in strength will reduce the fluidity of concrete; high performance concrete It is prone to large deformation during the pumping process, and its shear strength is very small, that is, the yield value is greater than the ultimate shear strength, so a large loss will occur in the process of overcoming the friction with the pipe wall and flowing

Method used

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  • A kind of C80 ultra-high pumping concrete and its preparation method
  • A kind of C80 ultra-high pumping concrete and its preparation method
  • A kind of C80 ultra-high pumping concrete and its preparation method

Examples

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Effect test

Embodiment 1

[0057] Embodiment 1: a kind of C80 ultra-high pumping concrete, the components in the raw material and their corresponding parts by weight are shown in Table 2.

[0058] A preparation method of C80 ultra-high pumping concrete is as follows:

[0059] Step 1, take by weighing the cement of 270-310kg, the medium-fine sand of 690-720kg, the crushed stone of 50-990kg, the fly ash of 166-206kg, the zeolite powder of 54-74kg, the zeolite powder of 54-74kg as shown in Table 1, 25- 56kg of graphite powder, 1.1-1.3kg of Glauber's salt, 1.2-1.4kg of slaked lime and 10-30kg of gangue extra-fine powder are stirred and mixed to obtain a first mixture;

[0060] In step 2, 135-147kg of tap water, 8.5-10.5kg of polycarboxylate water reducer and 0.0075-0.145kg of ether air-entraining agent are mixed uniformly into the first mixture, and stirred to obtain C80 ultra-high pumping concrete.

Embodiment 2-3

[0061] Example 2-3: a kind of C80 ultra-high pumping concrete, the difference from Example 1 lies in the content of the components, and the components of the raw materials and their corresponding parts by weight are shown in Table 2.

Embodiment 4

[0062] Example 4: A C80 ultra-high pumping concrete, the difference from Example 1 is the difference in component content, as shown in Table 2, the mineral admixture is 250kg / m 3 The milled granulated blast furnace slag produced by Wuhan Iron and Steel Company.

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Abstract

The invention discloses a C80 ultra-high pumping concrete and a preparation method thereof, comprising the following raw materials in parts by weight: 270-310 parts of cement; 690-720 parts of sand; 950-990 parts of gravel; 240-260 parts 8.5-10.5 parts of polycarboxylate superplasticizer; 25-56 parts of graphite powder; 10-20 parts of ultra-fine coal gangue powder; 0.0145-0.145 parts of air-entraining agent; 2.4-2.6 parts part of activator; and 135-147 parts of water. The preparation method is as follows: taking cement, sand, crushed stone, fly ash, zeolite powder, graphite powder, mirabilite, slaked lime and ultra-fine coal gangue powder in corresponding parts by weight, stirring and mixing them evenly to obtain the first mixture; Mix water, water reducing agent and air-entraining agent evenly, add to the first mixture, and stir evenly to obtain C80 ultra-high pumpable concrete. The C80 ultra-high pumping concrete of the present invention has the advantages of good fluidity and easy pumping while ensuring strength.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a C80 ultra-high pumping concrete and a preparation method thereof. Background technique [0002] The ultra-high pumping concrete is transported to the specified height of the building at one time through the pumping equipment. Therefore, the concrete must have good fluidity, high cohesion, water retention and resistance to segregation and bleeding. C80 concrete refers to compression resistance Concrete with a strength between 80MPa and 85MPa is a kind of high-strength concrete. As a new building material, high-strength concrete has the advantages of high compressive strength, strong deformation resistance, high density and low porosity. It is widely used in high-rise building structures, long-span bridge structures and some special structures. [0003] The Chinese invention patent application publication number CN110183161A discloses a high-strength concrete mixture, which is made of ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00146C04B22/002C04B14/02C04B14/06C04B18/08C04B14/047C04B14/024C04B22/147C04B22/064C04B18/12C04B2103/302C04B2103/304C04B18/141C04B18/146C04B2103/52
Inventor 林智峰
Owner 陕西宏基混凝土构件有限责任公司
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