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Preparation method of white carbon black-doped high performance concrete

A high-performance concrete and silica technology, applied in the field of engineering building materials, can solve the problems of difficult processing and high price of mineral ultrafine powder, and achieve the effects of excellent self-compacting workability, low cost and improving compactness.

Inactive Publication Date: 2016-06-01
GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the mineral ultrafine powder used in the domestic preparation of high-strength concrete is difficult to process, the price is high, and it will cause a large shrinkage problem

Method used

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  • Preparation method of white carbon black-doped high performance concrete
  • Preparation method of white carbon black-doped high performance concrete

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preparation example Construction

[0011] A method for preparing high-performance concrete mixed with white carbon black. When preparing high-performance concrete mixed with white carbon black, 16-20 parts of Portland cement, 0.1-0.5 parts of micro-silica fume, and 28-35 parts of mountain sand are taken in parts by weight. 33-41 parts of crushed stone, 5-7 parts of water, 0.3-0.6 parts of admixture, 1-2 parts of white carbon black, and the high-performance white carbon black mixed with each raw material can be obtained after the improved concrete production process concrete.

[0012] Wherein the improved concrete production process is as follows: mix the Portland cement, microsilica fume, mountain sand, gravel and white carbon black in the parts by weight, pour the mixed raw materials into a mixer, and stir for 20 ~30s, then add the water and the admixture of the said weight part again, after stirring for 100~120 seconds, the finished concrete product is obtained, and the molecular formula of the white carbon b...

specific Embodiment 1

[0013] Using 16 parts of Portland cement, 1 part of white carbon black, 33.5 parts of mountain sand, 42 parts of gravel, 7 parts of water, and 0.5 part of admixture to make concrete products, the performance test of the mixture was carried out, and the results are shown in Table 1. Show:

[0014] Table 1

[0015]

[0016] Results: The working performance of the test product is excellent, which can meet the technical requirements of pumping construction on the construction site.

[0017] Then the concrete of Test Example 1 was made into two groups of 150×150×150mm specimens, demoulded after 24h, placed in the curing room for 7d and 28d, and then the compressive strength test was carried out. The results are shown in Table 2:

[0018] Table 2

[0019]

Embodiment 2

[0021] Using 17 parts of Portland cement, 1.2 parts of white carbon black, 0.1 part of microsilica, 35 parts of mountain sand, 40 parts of gravel, 6.2 parts of water and 0.5 parts of admixtures to make concrete products, the performance test of the mixture was carried out. The results are shown in Table 3:

[0022] table 3

[0023]

[0024] Results: The working performance of the test product is excellent, which can meet the technical requirements of pumping construction on the construction site.

[0025] Then the concrete of Test Example 2 was made into two groups of 150×150×150mm specimens, demoulded after 24h, placed in the curing room for 7d and 28d, and then the compressive strength test was carried out. The results are shown in Table 4:

[0026] Table 4

[0027]

7 days 28 days

[0028] Concrete compressive strength (MPa) 67.5 80.5

[0029] The above test shows that the 60-80MPa concrete produced by the present invention has excel...

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Abstract

The invention discloses a preparation method of white carbon black-doped high performance concrete. The method comprises the following steps: taking 16-20 parts by weight of Portland cement, 0.1-0.5 parts by weight of silicon micro-powder, 28-35 parts by weight of hill sand, 33-41 parts by weight of broken stones, 5-7 parts by weight of water, 0.3-0.6 parts by weight of an additive and 1-2 parts by weight of white carbon black, and processing above raw materials through an improved concrete production technology to obtain the white carbon black-doped high performance concrete. The strength of the concrete can reach 60-80MPa, the slump can reach 210-230mm, the extended degree can reach 550-630mm, the pouring time is shorter than 5s, and the concrete also has the advantages of low cost and very wide market prospect.

Description

technical field [0001] The invention relates to a preparation method of white carbon black-doped high-performance concrete, which belongs to the technical field of engineering building materials. Background technique [0002] High-strength and high-performance concrete is an important direction for the development of concrete technology at present. With the development of urban construction, more and more super high-rise buildings and super-large buildings are being built, and the demand for high-performance concrete is gradually increasing. Because high-strength and high-performance concrete uses a relatively large amount of cementitious materials and has low water consumption, the viscosity of the concrete is high, which is not conducive to pumping construction. High-strength and high-performance concrete, which requires high concrete strength in building structures, is a technical problem. [0003] High-strength concrete technology developed earlier in foreign countries,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/06
Inventor 帅颂宪徐立斌李新刚曲清飞王林枫朱国良靳才宇董艺
Owner GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC
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