C35 low-gel-material self-compacting water-tolerant concrete and preparation method thereof

A self-compacting and concrete technology, applied in the field of concrete, can solve the problems of affecting the service life of the floor and the fragile surface of the board, and achieve the effects of saving resources, reducing production costs, and improving the package.

Inactive Publication Date: 2015-09-09
CHINA MINSHENG ZHUYOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing concrete floors, especially in areas where the kitchen and bathroom are often in contact with water, are often soaked in water, and the surface is more likely to be damaged, which affects the service life of the floor

Method used

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  • C35 low-gel-material self-compacting water-tolerant concrete and preparation method thereof
  • C35 low-gel-material self-compacting water-tolerant concrete and preparation method thereof
  • C35 low-gel-material self-compacting water-tolerant concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1－5

[0025] The raw material that following embodiment adopts is as follows:

[0026] Cement to PO 4 2.5, secondary fly ash, fine river sand with a fineness modulus of 1.9, machine-made sand with a fineness modulus of 3.3, and continuously graded 2-25mm crushed stones; the water reducing agent is polycarboxylic acid high-efficiency water reducing agent; the thickener used is hydroxypropyl methylcellulose; the early strength agent used is anhydrous sodium sulfate.

[0027] On the basis of the above raw materials, the design strength level of the laboratory is C35 self-compacting concrete mix ratio, and the amount of cementitious material is not more than 350kg / m 3 , see the table below for details.

[0028] (1) Specific mixing ratio of Examples 1-5 in Table 1 kg / m 3

[0029]

[0030] (2) Workability test of fresh self-compacting concrete

[0031] According to the "Technical Regulations for the Application of Self-Compacting Concrete", the slump spread, T 50 , U-shaped and V...

Embodiment 6－10

[0040] (1) Table 4 Example 6-10 Specific mix ratio kg / m 3

[0041]

[0042] (2) Workability test of fresh self-compacting concrete

[0043] According to the "Technical Regulations for the Application of Self-Compacting Concrete", the slump spread, T 50 , U-shaped and V-shaped. The results show that the working performance of fresh concrete with all mix ratios meets the standard requirements, see Table 5 for details.

[0044] Table 5 Work performance of fresh concrete

[0045]

[0046] (3) Self-compacting concrete strength test

[0047] According to relevant national standards, the compressive strength of concrete was tested for 1 day, 3 days, 7 days and 28 days, see Table 6 for details

[0048] Table 6 Results of compressive strength of concrete at different ages MPa

[0049] serial number

1 day

3 days

7 days

28 days

Example 6

12.1

17.4

20.8

35.5

Example 7

15.1

17.8

21.2

36.9

Example 8 ...

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Abstract

The invention relates to concrete, and specifically relates to C35 low-gel-material self-compacting water-tolerant concrete and a preparation method of the water-tolerant concrete. The scheme of the invention is that the C35 low-gel-material self-compacting water-tolerant concrete comprises the following raw materials, by mass: 180-300 kg/m3 of cement, 30-80 kg/m3 of coal ash, 220-640 kg/m3 of fine river sand, 300-600 kg/m3 of machine-made sand, 600-1100 kg/m3 of cobblestone with a diameter of 5-25 mm, 2-10 kg/m3 of a polycarboxylic acid water reducer, 0.01-0.03 kg/m3 of a thickening agent, 4-8 kg/m3 of an early strength agent, and 2-10 kg/m3 of a water-tolerant agent. The C35 low-gel-material self-compacting water-tolerant concrete provided in the invention is less in use amount of materials, has better fluidity, early strength, and water-tolerant property, and plays an important part in accelerating popularization of application of C35 self-compacting concrete.

Description

technical field [0001] The invention relates to concrete, in particular to a C35 low-glue self-compacting water-resistant concrete and a preparation method thereof. Background technique [0002] Self-compacting concrete (Self Compacting Concrete or Self-Consolidating Concrete referred to as SCC) refers to the ability to flow and compact under its own gravity, even if there are dense steel bars, it can completely fill the formwork, while obtaining good homogeneity, and does not require additional vibrating concrete. The amount of self-compacting concrete cementitious material in the prior art is generally 500kg / m 3 Above, the amount of cement is generally 350kg / m 3 Above, and a large number of mineral admixtures (mineral powder, fly ash) with hydration activity are used. Utilize the concrete prepared by this technology, its strength grade is often above C50; Nie Fazhi et al. (patent CN102060481A) have studied a kind of strength grade C50 level, and the amount of cementitio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04C04B28/08
Inventor 徐志辉
Owner CHINA MINSHENG ZHUYOU
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