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Pervious concrete additive and pervious concrete

A technology of permeable concrete and admixture, applied in the field of permeable concrete admixture and permeable concrete, can solve the problems of small permeability coefficient, short service life, low strength of permeable concrete, etc., and achieves enhanced cohesive force, improved workability, and increased strength and the effect of permeability coefficient

Inactive Publication Date: 2018-02-13
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if pure cement paste is used to bond aggregates, the resulting pervious concrete usually has low strength, low water permeability coefficient and short service life.

Method used

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  • Pervious concrete additive and pervious concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The modified nano-silica is prepared by the following method: Step 1, the silane coupling agent is formulated into an aqueous solution with a mass concentration of 1%; Step 2, the nano-silica with a particle size of 20nm is added to the prepared Silane coupling agent aqueous solution, and stirred for 10min. Wherein, the mass ratio of nano silicon dioxide and silane coupling agent aqueous solution is 1:1; step 3, drying the slurry obtained in step 2 to constant weight at 60° C., and ball milling for 5 minutes.

[0027] Preparation of permeable concrete admixture (in parts by weight): 25 parts of redispersible latex powder, 15 parts of hydroxypropyl methylcellulose, 35 parts of water reducing agent and the above-mentioned modified nano silicon dioxide obtained by weight Take 20 parts and mix them evenly to get the permeable concrete admixture.

[0028] Preparation of permeable concrete (in parts by weight): First, add 280 parts of cement, 1200 parts of stones with a part...

Embodiment 2

[0030] The modified nano-silica is prepared by the following method: Step 1, the silane coupling agent is formulated into an aqueous solution with a mass concentration of 2%; Step 2, adding nano-silica with a particle size of 30nm to the prepared Silane coupling agent aqueous solution, and stirred for 10min. Wherein, the mass ratio of nano silicon dioxide and silane coupling agent aqueous solution is 1:1; step 3, drying the slurry obtained in step 2 to constant weight at 60° C., and ball milling for 10 min.

[0031] Preparation of permeable concrete admixture (in parts by weight): 30 parts of redispersible latex powder, 20 parts of hydroxypropyl methylcellulose, 60 parts of water reducing agent and 40 parts of modified nano silicon dioxide obtained above Mix evenly to obtain the permeable concrete admixture.

[0032] Preparation of permeable concrete (in parts by weight): First, add 470 parts of cement, 1600 parts of stones with a particle size of 5 to 15 mm and 10 parts of t...

Embodiment 3

[0034] Preparation of modified nano-silica: step 1, preparing the silane coupling agent into an aqueous solution with a mass concentration of 5%; step 2, adding silicon dioxide with a particle size of 10 nm to the silane coupling agent prepared in step 1 aqueous solution, and stirred for 10min. Wherein, the mass ratio of nano-silica to silane coupling agent aqueous solution is 1:1; step 3, drying the slurry obtained in step 2 to constant weight at 60° C., and ball milling for 15 minutes.

[0035] Preparation of permeable concrete admixture (in parts by weight): 40 parts of redispersible latex powder, 30 parts of hydroxypropyl methylcellulose, 60 parts of water reducing agent and 30 parts of modified nano silicon dioxide obtained above Mix evenly to obtain the permeable concrete admixture.

[0036] Preparation of permeable concrete (in parts by weight): First, add 330 parts of cement, 1300 parts of stones with a particle size of 5 to 15 mm and 10 parts of the above-mentioned p...

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Abstract

The invention discloses a pervious concrete additive and pervious concrete prepared from the pervious concrete additive. The pervious concrete additive is prepared from the following raw materials inparts by weight: 25 to 40 parts of re-dispersible latex powder, 15 to 30 parts of hydroxypropyl methylcellulose, 35 to 60 parts of water reducing agents and 20 to 50 parts of modified nanometer silicon dioxide. The pervious concrete additive has the advantages that the bonding force of cement slurry and aggregate can be enhanced; the work performance of the concrete can be effectively improved; the intensity and the pervious coefficient of the concrete can be effectively improved; the service life of the concrete can be prolonged.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a permeable concrete admixture and permeable concrete. Background technique [0002] With the rapid development of economy and society, the scale and intensity of urban construction continue to increase, making the urban surface environment gradually harden, which has a great negative impact on the ecological environment of the city. Traditional cement or asphalt floors will prevent rainwater from seeping into the ground, which will not only easily cause urban waterlogging and affect traffic, but also cause a large amount of rainwater loss, which is not conducive to the replenishment of groundwater. If things go on like this, it will cause the groundwater level to drop, affect the growth of vegetation, and aggravate the problems of drought and water shortage in the city. Moreover, the hardened pavement hinders the atmospheric evaporation cycle, resulting in lower air ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B20/02C04B28/04C04B38/00
Inventor 阚强杨健肖智
Owner CHINA MCC17 GRP
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