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Concrete and preparation method thereof

A technology of concrete and parts by weight, applied in the field of civil engineering materials, can solve problems such as the influence of pumping efficiency and poor fluidity, achieve good dispersion effect, improve fluidity and flow retention

Inactive Publication Date: 2019-03-12
陕西天石实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned pumping concrete is only composed of cement, sand, gravel and water, and its fluidity is poor, which will affect the pumping efficiency and needs to be improved

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of concrete, the raw material components are shown in Table 1 in terms of weight fraction, wherein the water reducer is polycarboxylate water reducer (JH23). Wherein, the preparation method of this concrete comprises the following steps:

[0052] Step 1, first mix cement, fly ash, vinylpyrrolidone-vinyl acetate copolymer and formamide with each other and stir evenly for 5-10 minutes;

[0053] Step 2, mix the stone, mineral powder and sand evenly, add polypropylene fiber (2-3mm in length) and stir for 10-15min;

[0054] In step 3, slowly add the mixture in step 1 and water into the mixture in step 2, and stir while adding until the mixture is evenly stirred to obtain concrete.

Embodiment 2

[0056] The difference from Example 1 is that, in parts by weight, the concrete raw material components are shown in Table 1.

Embodiment 3

[0058] The difference from Example 1 is that, in terms of parts by weight, the concrete raw material components are as shown in Table 1 (the polypropylene fibers are removed).

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Abstract

The invention discloses concrete. Raw materials comprise the following components in parts by weight: 350-400 parts of cement, 60-65 parts of fly ash, 45-50 parts of mineral powder, 770-780 parts of sand, 980-990 parts of stone, 16-17 parts of a water reducing agent, and 160-170 parts of water. The concrete has the following advantages that a concrete bleeding path can be blocked by the fly ash, and thus the bleeding rate is lowered advantageously; meanwhile, the powder in the concrete is added, the volume of slurry is also increased, thus cohesiveness of the concrete is improved, and the segregation phenomenon of the concrete is restrained; meanwhile, the fly ash contains a large number of glass balls and thus achieves the effect of ball bearings, the yield shear stress of a mixture is remarkably lowered, thus by adding the fly ash into the concrete, continuity of the mixture slurry of the concrete can be improved, and liquidity is improved; and the water reducing agent is a concreteadditive capable of decreasing the water amount for mixing under the condition that slump of the concrete is maintained to be basically unchanged, the dispersing effect on cement particles is achieved, the workability of the concrete can be improved, and the liquidity of the concrete is improved.

Description

technical field [0001] The invention relates to the field of civil engineering materials, more specifically, it relates to a concrete and a preparation method thereof. Background technique [0002] Pumping concrete is to use the pressure of the concrete pump to directly transport the concrete to the pouring site through the pipeline. It can complete the horizontal and vertical transportation at one time, and it can be continuously poured with the placing boom. Pumping concrete has the advantages of large conveying capacity, fast speed, high degree of mechanization, saving manpower, and reducing the labor intensity of workers. [0003] The patent with the notification number CN104196241B discloses a construction method for pumping concrete, which includes the following steps: [0004] Step 1, configure pumped concrete; [0005] The pumped concrete is composed of the following raw materials according to the mass percentage: 14-16% cement, 25-28% sand, 48-50% gravel, and the ...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B18/08C04B18/12C04B14/06C04B14/02C04B24/24C04B16/0633C04B24/2652C04B24/124
Inventor 刘鹏张峰党智斌
Owner 陕西天石实业有限责任公司
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