Admixture special for color concrete and application method and using method of admixture

A technology of colored concrete and admixtures, applied in the field of building materials, can solve the problems of large slump loss, high cost, difficult dispersion of pigment agglomeration, etc., to improve alkali resistance, improve bonding strength, and good water reduction effect Effect

Active Publication Date: 2014-07-23
HUAIAN TESTING CENT FOR CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, during the construction of colored concrete, due to factors such as finer particles of pigments than cement and poor processing performance of pigments, it is easy to cause pigment agglomeration and difficult to disperse, and due to the adsorption of admixtures by the pigment itself and impurities, the initial color concrete The slump is small and the slump loss is large, which seriously affects the construction of colored concrete
[0006] In the prior art, polycarboxylate high-efficiency water reducers are commonly used as superplasticizers in admixtures, which have relatively high requirements for concrete raw materials, especially the soil content of sand an

Method used

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  • Admixture special for color concrete and application method and using method of admixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In terms of mass fraction, the mixing ratio of special admixtures for colored concrete is:

[0034] Water-reducing dispersible components: 8 parts of modified sodium lignosulfonate, 30 parts of polymethylene naphthalene sodium sulfonate, 5 parts of sodium dodecylsulfonate, and 57 parts of water. The dosage is 1.5% of the weight of the concrete cementitious material.

[0035] Modified durable components: 16 parts of styrene-maleimide, 15 parts of γ-glycidyl ether propyl trimethoxysilane, 20 parts of sodium stearate, 46 parts of styrene / acrylate copolymer, 2, 3 parts of sodium benzophenone 2'-dihydroxy-4,4'dimethoxy-5,5'disulfonate. The dosage is 2.0% of the weight of the concrete cementitious material.

[0036] Colored concrete is composed of mineral powder, cement, other mineral admixtures, water, pigments, special admixtures for concrete, coarse aggregate, and fine aggregate. The cementitious materials are: mineral powder, cement, and other mineral admixtures.

[0...

Embodiment 2

[0044] In terms of mass fraction, the mixing ratio of special admixtures for colored concrete is:

[0045] Water-reducing dispersible components: 20 parts of modified sodium lignosulfonate, 28 parts of polymethylene naphthalene sodium sulfonate, 2 parts of sodium dodecylsulfonate, and 50 parts of water. The dosage is 1.0% of the weight of the concrete cementitious material.

[0046] Modified durable components: 8 parts of styrene-maleimide, 28 parts of γ-glycidyl ether propyl trimethoxysilane, 8 parts of sodium stearate, 49 parts of styrene / acrylate copolymer, 2, 7 parts of sodium 2'-dihydroxy-4,4'dimethoxy-5,5'disulfonate benzophenone. The dosage is 1.5% of the weight of the concrete cementitious material.

[0047] All the other are with embodiment 1.

[0048]

Embodiment 3

[0050] In terms of mass fraction, the mixing ratio of special admixtures for colored concrete is:

[0051] Water-reducing dispersible components: 20 parts of modified sodium lignosulfonate, 15 parts of polymethylene naphthalene sodium sulfonate, 1 part of sodium dodecylsulfonate, and 64 parts of water. The dosage is 2.0% of the weight of the concrete cementitious material.

[0052]Modified durable components: 15 parts of styrene-maleimide, 18 parts of γ-glycidyl ether propyl trimethoxysilane, 20 parts of sodium stearate, 40 parts of styrene / acrylate copolymer, 2, 7 parts of sodium 2'-dihydroxy-4,4'dimethoxy-5,5'disulfonate benzophenone. The dosage is 3.0% of the weight of the concrete cementitious material.

[0053] All the other are with embodiment 1.

[0054]

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Abstract

The invention provides an admixture special for color concrete and an application method and using method of the admixture. The special admixture comprises a water reducing disperse component and a modified durable component, wherein the water reducing disperse component comprises the following components in parts by mass: 8-20 parts of modified lignosulfonate, 15-35 parts of polymethylene sodium naphthalene sulfonate, 1-5 parts of sodium dodecyl sulfate and 50-70 parts of water; the modified durable component comprises the following components in parts by mass: 5-16 parts of styrene-maleimide, 15-28 parts of organic silane coupling agent, 8-20 parts of stearate, 40-60 parts of redispersible polymer powder and 3-7 parts of inhibitor. According to the special admixture provided in the invention, alkali returning of the color concrete can be inhibited, and the workability, glossiness and durability of the concrete are improved.

Description

[0001] technical field [0002] The invention relates to the field of building materials, in particular to a special admixture for colored concrete and its application and usage method. [0003] Background technique [0004] With the improvement of people's living standards, urban infrastructure construction not only meets the functional requirements, but also people pursue natural and simple living space and high-grade living environment. Colored concrete technology system has strong artistry, environmental protection, color And the diversity of styles, easy construction, various changes, low cost and no impact on the environment have made it develop rapidly in China. After years of development and improvement, the product is rational in process and stable in special chemical materials. It has reached a very mature level in terms of safety, environmental protection and decorative effect. The scope of application has developed from outside to indoor, from garden landscaping t...

Claims

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Application Information

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IPC IPC(8): C04B24/18C04B103/30
Inventor 郭建华季平丁百湛李保亮
Owner HUAIAN TESTING CENT FOR CONSTR ENG
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