A kind of saline-alkali modifier for planting concrete and its application method

A technology of planting raw concrete and improving agent, applied in the field of greening, can solve the problems of lack of alkali removal, insufficient thoroughness, affecting the final effect of porous planting concrete, etc., to achieve the effect of suitable plant growth, better and lasting fertility, and beneficial to ecological restoration.

Active Publication Date: 2019-11-01
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The porous concrete prepared at the same time only covers the soil on the surface, and plants are planted in the soil. The lack of water in the pores, the lack of fertilizer effect and the incomplete alkali removal will affect the final effect of the porous planting concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] A method for preparing the above-mentioned salt-alkali modifier, the method specifically comprises the following steps:

[0022] Ingredients: Weigh 10% of ammonium bicarbonate, 65% of humus, 15% of methyl cellulose and 10% of sodium alginate according to the designed ingredients, and grind to 30-50 mesh;

[0023] Mixing: Add the powder prepared in step 1 into the forced mixer one by one, under the action of ultrasonic waves, the temperature is 1°C, the speed is 100 rpm, and the mixture is mixed for 10 minutes, and the mixture is evenly mixed to obtain the salt Alkaline improver.

[0024] Wherein, the weight-to-number ratio of each component of the humus is: 20 parts of mixed grass powder, 15 parts of sawdust, 25 parts of diatomaceous earth, and 15 parts of Bacillus subtilis;

[0025] Using cement 150kg / m 3 ,26-31.5mm aggregate 1450kg / m 3 , water 30kg / m 3 , Superplasticizer 3kg / m 3 , Prepare a porous concrete test block with a size of 150mm×150mm×150mm. Stir the sal...

example 2

[0027] A method for preparing the above-mentioned salt-alkali modifier, the method specifically comprises the following steps:

[0028] Ingredients: Weigh 5% of ammonium bicarbonate, 75% of humus, 12% of methyl cellulose and 8% of sodium alginate according to the designed ingredients, and grind to 30-50 mesh;

[0029] Mixing: Add the powder prepared in step 1 into the forced mixer one by one. Under the action of ultrasonic waves, the temperature is 2°C, the speed is 150 rpm, and the mixture is mixed for 15 minutes. Mix it evenly to obtain the salt Alkaline improver.

[0030] Wherein, the weight-to-number ratio of each component of the humus is: 25 parts of mixed grass powder, 20 parts of sawdust, 35 parts of diatomaceous earth, and 20 parts of Bacillus subtilis;

[0031] Using cement 200kg / m 3 ,26-31.5mm aggregate 1450kg / m 3 , water 40kg / m 3 , Superplasticizer 4kg / m 3 , Prepare porous concrete, pave it to the slope, after hardening, sprinkle water for maintenance, cover w...

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PUM

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Abstract

The invention relates to a saline soil restoration material for a vegetation concrete and an application method. The saline soil restoration material is prepared from the following components: ammonium bicarbonate, humus, an organic matter and sodium alga acid. The saline soil restoration material is filled through pores of a porous concrete, and is stirred with the sprayed vegetation concrete, so that carbonization, alkaline removal, water retention and decomposition are carried out on the prepared vegetation concrete through a carbonization effect, an alkaline removal effect, a water retention effect and a decomposition effect of the saline soil restoration material, calcium hydroxide generated on the surface of a cement concrete can be reacted with carbon dioxide and sulfate radical or reacted with acid salt, a slurry interface becomes more compact when calcium hydroxide is neutralized at the same time, a porous concrete structure subjected to alkaline removal treatment is obtained, the influence of an alkaline matter on plant growth is eliminated, and meanwhile, through the water retention effect and the decomposition effect, the vegetation concrete has more excellent water retention effect and more durable fertility.

Description

technical field [0001] The invention belongs to the field of greening, and in particular relates to a saline-alkali modifier for planting concrete and a usage method. Background technique [0002] At present, the commonly used porous concrete is prepared by mixing cement, admixture and large particle size aggregate (26~31.5mm). After hardening, 20~25% calcium hydroxide and high alkalinity calcium silicate hydrate gel will be generated. Such strong alkaline substances, which are attached to the surface of the aggregate, make the pores of porous concrete a typical alkaline environment. In the early stage of plant growth, the root system of the plant can grow. In the later stage, with the development of time, the surface of the cement hardened body The accumulation of alkaline substances will greatly affect the growth of plants in porous planting concrete. At the same time, the prepared porous concrete only covers the soil on the surface, and plants are planted in the soil. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38
CPCC04B40/0042C04B22/10C04B18/24C04B18/26C04B14/08C04B2103/0001C04B24/383C04B24/38
Inventor 卞立波宋少民李飞王林袁冬海王琴路宏波周文娟李地红张向前
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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