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Aging-resistant colored pervious concrete and preparation method thereof

A permeable concrete and anti-aging technology, which is applied in the field of building materials, can solve the problems of colored concrete that is easy to age and fade, and achieve the effects of adjustable performance, improved tensile strength, and improved durability

Inactive Publication Date: 2020-06-19
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the current problem that colored concrete is easy to age and fade, the present invention proposes an aging-resistant colored permeable concrete and its preparation method, thereby improving the durability of colored concrete color and effectively prolonging the service life of colored concrete

Method used

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  • Aging-resistant colored pervious concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036](1) Dissolve 0.35kg of cellulose in a solution of 6.5kg of sodium hydroxide and 32kg of water to make a cellulose solution, then heat to 60°C and add 8kg of β-cyclodextrin, stir until completely dissolved, then add 4kg of silicon Acetate ethyl ester, then slowly drop into 0.12kg cyclohydrochloropropane and continue to mix and stir to obtain cellulose-modified β-cyclodextrin hydrogel;

[0037] (2) Phosphoric acid was added dropwise to the cellulose-modified β-cyclodextrin hydrogel to adjust the pH value to 2, so that tetraethyl orthosilicate was hydrolyzed, and in the interior of the cellulose-modified β-cyclodextrin hydrogel Form silica hydrogel;

[0038] (3) Add silica hydrogel to water, soak and age for 3 days, after soaking, the hydrogel becomes translucent, and a translucent hydrogel is obtained;

[0039] (4) Freeze-dry the translucent hydrogel at -20°C for 25 hours, and freeze-dry to prepare a silica-complexed β-cyclodextrin aerogel, which is pulverized and used fo...

Embodiment 2

[0043] (1) Dissolve 0.3kg of cellulose in a solution of 6kg of sodium hydroxide and 35kg of water to make a cellulose solution, then heat to 58°C and add 7kg of β-cyclodextrin, stir until completely dissolved, then add 3.5kg of orthosilicon Acetate ethyl ester, then slowly drop into 0.1kg cyclohydrochloropropane and continue to mix and stir to obtain cellulose-modified β-cyclodextrin hydrogel;

[0044] (2) Phosphoric acid was added dropwise to the cellulose-modified β-cyclodextrin hydrogel to adjust the pH value to 1.5, so that tetraethyl orthosilicate was hydrolyzed, and in the interior of the cellulose-modified β-cyclodextrin hydrogel Form silica hydrogel;

[0045] (3) Add the silica hydrogel into water, soak and age for 2 days, after soaking, the hydrogel becomes translucent, and a translucent hydrogel is obtained;

[0046] (4) Freeze-dry the translucent hydrogel at -22°C for 26 hours, and freeze-dry to prepare a silica-complexed β-cyclodextrin aerogel, which is pulverized...

Embodiment 3

[0050] (1) Dissolve 0.4kg of cellulose in a solution of 7kg of sodium hydroxide and 30kg of water to make a cellulose solution, then heat to 62°C and add 8kg of β-cyclodextrin, stir until completely dissolved, then add 4.5kg of orthosilicon Acetate ethyl ester, then slowly drop into 0.12kg cyclohydrochloropropane and continue to mix and stir to obtain cellulose-modified β-cyclodextrin hydrogel;

[0051] (2) Phosphoric acid was added dropwise to the cellulose-modified β-cyclodextrin hydrogel to adjust the pH value to 2.5, so that tetraethyl orthosilicate was hydrolyzed, and in the interior of the cellulose-modified β-cyclodextrin hydrogel Form silica hydrogel;

[0052] (3) Add silica hydrogel to water, soak and age for 3 days, after soaking, the hydrogel becomes translucent, and a translucent hydrogel is obtained;

[0053] (4) Freeze-dry the translucent hydrogel at -18°C for 26 hours, and freeze-dry to prepare a silica-complexed β-cyclodextrin aerogel, which is pulverized for ...

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Abstract

The invention provides aging-resistant colored pervious concrete and a preparation method thereof. The colored pervious concrete is prepared by uniformly mixing Portland cement, steel slag, coarse aggregate, cellulose ether, a water reducing agent, an air entraining agent and an aerogel coated dye, wherein the aerogel coated dye is prepared by compounding cellulose modified beta-cyclodextrin hydrogel with silicon dioxide and then coating an oil-soluble organic dye with the formed mixture. The colored pervious concrete provided by the invention has the advantages of bright color, lasting colorfixation performance and the like, and is wide in application prospect. The silicon dioxide is compounded with the beta-cyclodextrin aerogel for coating of the dye, and the beta-cyclodextrin aerogel is of an externally hydrophilic and internally hydrophobic structure, so adsorption of the organic dye is facilitated; the beta-cyclodextrin aerogel having been compounded with the silicon dioxide hashigh tensile strength, so structural stability of the beta-cyclodextrin aerogel is facilitated; and after coating, the dye is not prone to aging in the sun, and meanwhile, the dye has high oil resistance.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an aging-resistant colored permeable concrete and a preparation method thereof. Background technique [0002] Ordinary cement concrete is the most important building material in the world today. It can not only be used as a building material, but also has a certain decorative effect. Due to the good plasticity of concrete, it can be poured into various complex shapes; due to the good fluidity of the mixture, in traffic and highway engineering, it can be mainly used for pouring road pavement, bridges, docks, etc.; in cities In road engineering, it can be mainly used for urban roads, sculptures and other artistic creations. However, the biggest disadvantage of ordinary cement concrete is that the appearance is monotonous, dark and dull, giving people a sense of depression. Therefore, the application of colored concrete has received widespread attention. [0003] Color...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/40C04B111/82
CPCC04B28/04C04B2111/00284C04B2111/20C04B2111/40C04B2111/82C04B18/142C04B14/02C04B24/383C04B24/18C04B24/26C04B24/16C04B14/064C04B24/38C04B2103/54C04B18/12C04B24/20
Inventor 陈庆陈巧和司文彬何方刘超
Owner CHENDU NEW KELI CHEM SCI CO LTD