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Pervious concrete additive and preparation method thereof

A permeable concrete and additive technology, applied in the field of concrete admixtures, can solve problems such as poor wear resistance, poor water permeability, and poor strength of permeable concrete, and achieve the effect of ensuring strength and excellent performance

Active Publication Date: 2014-03-19
厦门市西联恒业建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the current defects of poor strength, poor abrasion resistance, poor water permeability, and difficulty in application in urban roads and expressways, the present invention proposes a pervious concrete additive, which is mainly composed of micro-porous materials. The slow-dissolving material resides in the pores in advance to ensure that the pores of the microporous material are not blocked by the cement gel material during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Micronize Glauber's salt, urea, and soluble starch to 1250 mesh in a vortex airflow microcomputer at a weight ratio of 10:2:1 to obtain a slow solvent;

[0030] 2) Add 30 parts by weight of the slow solvent obtained in step 1) and 70 parts by weight of microporous expanded perlite into the closed dispersing mixer. The water bath of the dispersing mixer is kept at a constant temperature of 50-60 ° C, dispersed and mixed at a speed of 600 rpm, and the vacuum negative pressure is turned on at the same time To 2.0Mpa, disperse for 10min, after the slow solvent is melted, it is adsorbed and resides in the microporous material under vacuum pressure;

[0031] 3) Spray 3 parts by weight of cellulose ether solution with a concentration of 1-3% into step 2) under high pressure, and disperse and mix at a speed of 800 rpm for 8 minutes, so that the colloidal hydrosol is completely coated on the surface of the microporous material;

[0032] 4) Add a mixture of 1.0 parts by weight ...

Embodiment 2

[0034] 1) Micronize Glauber's salt, urea, and soluble starch to 1250 mesh in a vortex airflow microcomputer at a weight ratio of 10:2:1 to obtain a slow solvent;

[0035] 2) Add 25 parts by weight of the slow solvent obtained in step 1) and 75 parts by weight of fine porous zeolite powder into a closed disperser mixer. The water bath of the disperser mixer is kept at a constant temperature of 50-60°C, dispersed and mixed at a speed of 500 rpm, and the vacuum negative pressure is turned on at the same time. 2.0Mpa, disperse for 15 minutes, after the slow solvent is melted, it is adsorbed and resides in the microporous material under vacuum pressure;

[0036] 3) Spray 4 parts by weight of polyvinyl alcohol solution with a concentration of 10% into step 2) under high pressure, and disperse and mix at a speed of 800rpm for 5 minutes, so that the colloidal hydrosol is completely coated on the surface of the microporous material;

[0037] 4) Add 1.0 parts by weight of melamine supe...

Embodiment 3

[0039] 1) Micronize Glauber's salt, urea, and soluble starch to 1250 mesh in a vortex airflow microcomputer at a weight ratio of 10:2:1 to obtain a slow solvent;

[0040] 2) Add 20 parts by weight of the slow solvent obtained in step 1) and 80 parts by weight of fine porous expanded vermiculite into the closed disperser mixer. The water bath of the disperser mixer is kept at a constant temperature of 50-60°C, dispersed and mixed at a speed of 600rpm, and the vacuum negative pressure is turned on at the same time To 2.0Mpa, disperse for 10min, after the slow solvent is melted, it is adsorbed and resides in the microporous material under vacuum pressure;

[0041] 3) Spray 3 parts by weight of silicic acid with a concentration of 4% into the solution in step 2) under high pressure, and disperse and mix at a speed of 800rpm for 8 minutes, so that the colloidal hydrosol is completely coated on the surface of the microporous material;

[0042] 4) Add a mixture of 1.2 parts by weigh...

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PUM

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Abstract

The invention provides a pervious concrete additive, which is characterized by comprising the following components by weight: 50-70 parts of micro porous material, 20-30 parts of a slow-dissolving agent, 3-5 parts of hydrosol and 2-3 parts of other additives. The concrete additive employs fine porous material as a main body, and the slow-dissolving material is stored in the pores of the porous materials in advance through vacuum adsorption. The additive is used for the preparation of porous concrete, can eliminate or reduce the usage of coarse aggregate; after formation of a firm integrity by the fine porous material and the concrete, slow-dissolving material in the pores gradually degrades and dissolves along with time; and completely-through micro permeable pores formed in the concrete not only guarantee the strength and abrasion resistance of the concrete but also have complete permeability, so that the additive can be added to high load road concrete for municipal roads and highways.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a permeable concrete additive and a preparation method. Background technique [0002] With the rapid development of my country's economy and the acceleration of urban construction, the urban ground has gradually been covered by buildings and concrete pavement, and the area of ​​permeable vegetation is becoming less and less. The impermeable surface has brought many negative effects to the ecological cycle of the city. Influence. Due to the lack of water permeability on the ground, rainwater cannot penetrate into the ground, resulting in the lack of exchange of heat and water in the city, which makes it difficult to regulate the temperature and humidity of the city normally, resulting in the urban "heat island phenomenon". At the same time, since rainwater cannot penetrate into the ground in a short period of time, a large amount of rainwater can only be discharged int...

Claims

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Application Information

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IPC IPC(8): C04B24/38
Inventor 陈庆曾军堂庞玉琴
Owner 厦门市西联恒业建筑工程有限公司
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