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A kind of fair-faced concrete preparation technology and special admixture preparation

A technology of fair-faced concrete and preparation process, applied in the field of concrete, can solve problems such as incomplete surface patterns, and achieve the effects of strong adhesion, reduced damage and weak penetration

Active Publication Date: 2020-07-10
成都精准混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] A kind of fair-faced concrete disclosed in the Chinese patent whose application publication number is "CN107445557A" mainly includes ordinary Portland cement, river sand, fly ash, silica fume, slag, water in the proportion disclosed in the above-mentioned patent. , silane coupling agent and other substances; but with the progress of the times, a variety of patterns are usually set on the surface of the poured concrete block for decoration; most of the patterns on the surface are made by mold casting, and the mold is removed after curing. However, the cured concrete sticks to the mold, causing the surface pattern to be incomplete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A clear-faced concrete preparation process mainly includes water, cement, fly ash, mineral powder, medium sand, gravel, dispersant, defoamer, air-entraining agent and water reducer.

[0054] This example includes 150 parts of water, 255 parts of cement, 115 parts of fly ash, 130 parts of mineral powder, 1000 parts of medium sand, 1000 parts of crushed stone, 0.1 part of dispersant, 0.0001 part of air-entraining agent, and 7.5 parts of water reducer .

[0055] The preparation method is as follows:

[0056] Step 1, wetting: Pour 5-10 parts of water into the blender to wet the blender;

[0057] Step 2: Pour the fly ash and mineral powder into the mixer and mix evenly;

[0058] Step 3: Pour in medium sand and gravel, and keep stirring;

[0059] Step 4: Add the remaining water and stir evenly;

[0060] Step 5: Pour in the cement and stir until uniform;

[0061] Step 6: Pour in the mixture of dispersant, defoamer, air-entraining agent and water reducer, and stir until un...

Embodiment 2

[0063] The preparation method of fair-faced concrete described in embodiment 2 and embodiment 5 is the same as the preparation method in embodiment 1, but each component content is different, record in table 1.

[0064] Table 1:

[0065] Example 1 Example 2 Example 3 Example 4 Example 5 water 150 160 155 160 150 cement 260 295 280 290 265 fly ash 115 125 120 120 125 mineral powder 130 140 135 140 130 Middle sand 650 700 680 660 670 gravel 1000 1100 1050 1050 1080 Dispersant 0.1 0.8 0.5 0.5 0.6 Defoamer 0.0001 0.0020 0.0010 0.0015 0.0010 air entraining agent 0.0001 0.0005 0.0003 0.0005 0.0002 Superplasticizer 7.5 8.0 7.8 7.8 7.6

[0066] The concrete prepared in Example 1-Example 5 was tested for structural strength, and the test results were recorded in Table 2.

[0067] Table 2:

[0068] Compressive strength (MPa) Alkali resistance Moistu...

Embodiment 6

[0076] The preparation of a special additive includes water, organic solvent, dispersant, emulsifier, sodium stearate, silicate, perhydropolysilazane and siloxane.

[0077] Include 30 parts of water, 5 parts of organic solvents, 0.3 parts of dispersants, 0.01 parts of emulsifiers, 0.05 parts of sodium stearate, 0.01 parts of silicate, 0.8 parts of perhydropolysiloxane and 0.6 parts of silicone alkyl.

[0078] The preparation method is as follows:

[0079] S1: Mix perhydropolysilazane, siloxane, dispersant and organic solvent, and disperse evenly;

[0080] S2: Mix the mixed liquid in S1 with water and an emulsifier, and stir at high speed to form an emulsified suspension;

[0081] S3: Pour sodium stearate and silicate into it, and stir at high speed for 5-10 minutes.

[0082] The preparation method of Example 7-Example 9 is basically the same as the preparation method in Example 6, but the contents of each component are shown in the table below.

[0083] Table 4:

[0084] ...

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Abstract

The invention relates to a preparation technology of fair-faced concrete and a preparation method of a special admixture. The fair-faced concrete is prepared from the following components: water, cement, fly ash, mineral powder, medium sand, gravels, a dispersing agent, a defoaming agent, an air entraining agent and a water reducing agent. The fair-faced concrete has good apparent effects; by utilizing molding effects of the concrete, a decorative effect can be realized, and secondary finishing and decorating of partial molded concrete are eliminated; the fair-faced concrete is often used as decorative concrete and has the characteristics of small color difference and the like; the cured and molded concrete has the advantages of no obvious color difference in surface color and unique texture; the fair-faced concrete has the advantages of flat and smooth surface, uniform color, angular property, no damage or pollution, good environmental affinity and close to nature when being used forengineering construction.

Description

technical field [0001] The invention relates to concrete, in particular to a preparation process of fair-faced concrete and preparation of special admixtures. Background technique [0002] Fair-faced concrete refers to a cast-in-place concrete project that uses the original pouring surface of the concrete or the concrete surface that is protectively treated with a transparent protective agent as the outer surface, and achieves an aesthetic effect through the natural color and texture of the concrete and the appearance quality of carefully designed construction; pouring in sequence , without any external decoration is the two most critical points of fair-faced concrete. In recent years, fair-faced concrete has been increasingly used in industrial and civil construction projects, and its main features are as follows: [0003] 1. Improve project quality; [0004] 2. Save engineering cost: the surface of fair-faced concrete is not corroded, and the plaster layer and surface la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C10M173/02C10N40/36
CPCC04B28/00C04B2201/50C10M173/02C10M2207/126C10M2229/02C10N2040/36C04B22/002C04B18/08C04B18/141C04B14/06C04B14/02C04B2103/408C04B2103/50C04B2103/304C04B2103/302C10N2010/02
Inventor 马占民王小均邱波曹成庭
Owner 成都精准混凝土有限公司
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