Vegetable ecological concrete for cold regions and preparation method thereof

Abstract

The invention relates to vegetation ecological concrete for a cold region and a preparation method of the vegetation ecological concrete. The vegetation ecological concrete is prepared from the following raw materials in parts by weight: 300-450 parts of a cementing material, 50-80 parts of an alkali activator, 15-20 parts of a nutrient medium, 150-200 parts of sand, 1400-1600 parts of stones, 2-3 parts of a water-retaining agent, 40-60 parts of a cross-linking agent, 20-30 parts of a toughening agent, 3.5-5 parts of a water reducing agent and 80-100 parts of water. The cross-linking agent is a mixture of multi-arm polyethylene glycol amine and polyether epoxy silicone oil in a mass ratio of 1: (2-3), and the toughening agent is epoxy silane coupling agent modified organic silicon rubber. The cross-linking agent improves the strength of the concrete, the toughening agent improves the toughness of the concrete, the toughness of the concrete is enhanced while the strength of the concrete is improved, toughness-strength balance is achieved, pressure generated by ice crystal expansion can be resisted, energy can be absorbed and dissipated through toughness deformation, and the freeze-thaw resistance of the ecological concrete is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ecological concrete, and in particular relates to plantable ecological concrete for cold regions and a preparation method thereof. Background Art

[0002] Mineral resources are the foundation of social and economic development. my country has rich mineral resources, including 155 kinds, distributed in more than 200,000 places. At present, frequent mining and unreasonable mining have caused serious damage to the soil structure. The lack of surface vegetation protection has led to soil erosion and reduced fertility, affecting plant nutrient absorption.

[0003] Ecological concrete, referred to as vegetation concrete, also known as "vegetation concrete", "vegetation concrete", "greening concrete", "ecological concrete", "ecological anti-filtration vegetation concrete", etc., refers to concrete and its products that can adapt to the growth of green plants and have certain protective functions. It has been widely used in vegetation restoration on mine slopes. In engineering applications, it is sprayed on the slope surface using spraying equipment to achieve an organic combination of shallow protection and ecological restoration.

[0004] As disclosed in patent CN112876183B, a plantable lightweight porous concrete and a preparation method thereof, the present invention provides a plantable lightweight porous concrete comprising the following components in the following weight proportions: 260-300 parts of slag silicate cement; 90-100 parts of water; 30-40 parts of river sand; 700-800 parts of sludge ceramsite; 50-75 parts of fly ash; 10-15 parts of silica fume; 20-25 parts of acrylic emulsion; and 5.5-8 parts of polycarboxylic acid water reducer. Patent CN104944892B discloses an ecological concrete for slope greening and a preparation method thereof, the ecological concrete comprising components: 1200-1300 parts of coarse sand, 200-250 parts of pottery sand, 70-100 parts of cement, 25-50 parts of sodium carboxymethyl cellulose, 20-30 parts of sodium silicate, 3-5 parts of superphosphate, 2-3 parts of vermiculite, 2-3 parts of perlite, 5-10 parts of peat soil, and 160-200 parts of water. Patent CN110407544B discloses an ecological porous concrete and a preparation method and application thereof, comprising the following components by weight: 1-30 parts of low alkalinity cementitious material, 1-10 parts of water, 0.1-5 parts of high molecular polymer, 0.1-3 parts of water reducer, and 65-90 parts of gravel.

[0005] The above is the ecological concrete slope protection technology, which has a wide range of applications and can cover slopes of different natures such as gentle slopes, steep slopes, and vertical slopes. It can solve the shallow protection and ecological greening problems of mining slopes once and for all. However, for cold and high-cold mining areas in the north where there is economic construction, such as mining areas where photovoltaic power stations are built, if the winter lasts for a long time, everything will be tested by freeze-thaw cycles. The above ecological concrete has a large number of pores that provide space for the entry and storage of water. The freezing and melting of water in the pores will cause huge cyclic internal stress inside the concrete, and then cracks will occur. As the number of freeze-thaw cycles increases, the cracks will continue to expand, extend, and connect with each other. This not only weakens the strength and integrity of the ecological concrete, but also causes peeling and falling of blocks on its surface, resulting in deviations in the installation position of the equipment, affecting the accuracy and calibration of the photovoltaic array, thereby reducing the efficiency of photoelectric conversion and reducing the output of electricity, which is not conducive to the diversified development of the mining area.

[0006] Therefore, the development of an ecological concrete with excellent freeze-thaw resistance is of great significance to the ecological restoration and economic development of cold and alpine mining areas. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a plantable ecological concrete for cold regions and a preparation method thereof. The present invention adopts a cross-linking agent formed by mixing hydrophilic multi-arm polyethylene glycol amine and polyether epoxy silicone oil. Chemical bonds are generated at the weak interface between aggregate and cementitious material in concrete through the reaction between amino groups and epoxy groups, forming a three-dimensional network cross-linking structure that can resist ice expansion stress, thereby effectively preventing the separation of aggregate and cementitious material and reducing the damage of ice expansion to the internal structure of concrete; epoxy silane coupling agent modified silicone rubber is used as a toughening agent. The epoxy group can enable it to adhere well to the surfaces of various materials in concrete. While reacting with the multi-arm polyethylene glycol amine in the cross-linking agent to construct an interpenetrating network structure, it can also absorb and disperse stress in each freeze-thaw cycle, so that the concrete is not damaged under the action of repeated freeze-thaw stress. Cross-linking agents mainly focus on improving the strength of concrete, while toughening agents mainly focus on improving the toughness of concrete. The combination of the two can improve the strength of concrete while enhancing its toughness, achieving a good toughness-strength balance. In this way, during the freeze-thaw cycle, the concrete can both resist the pressure generated by the expansion of ice crystals and absorb and dissipate energy through tough deformation, thereby effectively improving the freeze-thaw resistance of ecological concrete.

[0008] In order to achieve the above purpose, the following technical solutions are adopted:

[0009] A plantable ecological concrete for cold regions comprises the following raw materials in parts by weight: 300-450 parts of cementitious materials, 50-80 parts of alkali activator, 15-20 parts of nutrient matrix, 150-200 parts of sand, 1400-1600 parts of gravel, 2-3 parts of water retaining agent, 40-60 parts of cross-linking agent, 20-30 parts of toughening agent, 3.5-5 parts of water reducing agent, and 80-100 parts of water; the cross-linking agent is a mixture of multi-arm polyethylene glycol amine and polyether epoxy silicone oil in a mass ratio of 1:2-3, and the toughening agent is epoxy silane coupling agent modified silicone rubber.

[0010] The multi-arm polyethylene glycol amine has a weight average molecular weight of 3000-5000 g / mol and is selected from one or a combination of two or more of four-arm polyethylene glycol amine, six-arm polyethylene glycol amine and eight-arm polyethylene glycol amine, preferably six-arm polyethylene glycol amine.

[0011] The epoxy value of the polyether epoxy silicone oil is 12-25 mmol / 100g. The polyether epoxy silicone oil is a linear polydimethylsiloxane molecule with multiple side chain reactive polyether epoxy groups inserted therein, and is mostly used as a fabric finishing agent, and has hydrophilicity, high temperature resistance and good reactivity.

[0012] The epoxy silane coupling agent modified silicone rubber is prepared by a method comprising the following steps:

[0013] The epoxy silane coupling agent is added to the hydrolysis solution for hydrolysis, and the organic silicone rubber is added for modification reaction. After the reaction is completed, the organic silicone rubber is filtered, washed and dried to obtain the epoxy silane coupling agent modified organic silicone rubber.

[0014] The hydrolyzate is prepared by mixing ethanol and water into an alcohol-water solution, and then adding acetic acid to adjust the pH to 4.5-5.5, wherein the mass fraction of ethanol in the alcohol-water solution is 90-95wt%. The epoxy silane coupling agent accounts for 3-5wt% of the hydrolyzate. The epoxy silane coupling agent is 3-5wt% of the silicone rubber. The hydrolysis reaction temperature is 40-60°C and the time is 0.5-1h. The modification reaction temperature is 40-60°C and the time is 1-3h. The washing is washing with water 1-3 times, and the drying is drying at 60-100°C to constant weight.

[0015] The epoxysilane coupling agent is selected from 3-(2,3-epoxypropyloxy)propyltrimethoxysilane, 3-(2,3-epoxypropyloxy)propyltriethoxysilane, 3-(2,3-epoxypropyloxy)propylmethyldimethoxysilane, 3-(2,3-epoxypropyloxy)propylmethyldiethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethylmethyldimethoxysilane and 2-(3,4-epoxycyclohexyl)ethylmethyldiethoxysilane, or a combination of two or more thereof.

[0016] The average particle size of the organic silicone rubber is 5-15 μm, and is selected from one or a combination of two or more of Japan Shin-Etsu KMP-594, KMP-597, and KMP-598.

[0017] Cross-linking agents mainly focus on improving the strength of concrete, while toughening agents mainly focus on improving the toughness and crack resistance of concrete. The two are used in combination to improve the strength of concrete while enhancing its toughness, achieving a good toughness-strength balance. Mismatches between the two are not conducive to freeze-thaw resistance. For example, too much cross-linking agent will form too many cross-linking points inside the concrete, hindering the normal growth and distribution of cement hydration products, making the internal structure of the concrete uneven, increasing porosity, and lowering the compressive strength. On the contrary, too much toughening agent cannot form a sufficient cross-linking network structure to effectively limit the growth and expansion of ice crystals, resulting in a significant decrease in freeze-thaw resistance.

[0018] The cementitious material is prepared by mixing cement, fly ash and mineral powder in a mass ratio of 0.6-0.8:0.2-0.3:0.2-0.3.

[0019] The cement is silicate cement with a strength of 42.5-52.5.

[0020] The fly ash is selected from primary fly ash, secondary fly ash, or a combination of two or more thereof.

[0021] The mineral powder is selected from one of S105 grade mineral powder, S95 grade mineral powder, S75 grade mineral powder, or a combination of two or more thereof.

[0022] The alkaline activator is selected from one or a combination of two or more of sodium sulfate, calcium sulfate and sodium carbonate.

[0023] The nutrient matrix is ​​selected from one or a combination of two or more of vermiculite, perlite, peat, and organic fertilizer. Preferably, the bulk density is 50-80 kg / m 3 , perlite with an average particle size of 0.5-3mm.

[0024] The sand fineness modulus is 2.3-3.

[0025] The stones are 10-20 mm continuously graded stones.

[0026] The water retaining agent is selected from one or a combination of two or more of carboxymethyl cellulose, hydroxyethyl cellulose and polyvinyl alcohol.

[0027] The water reducing agent has a water reducing rate of 20-25%, and is selected from one or a combination of two or more of a naphthalene-based water reducing agent and a polycarboxylic acid-based water reducing agent.

[0028] The present invention also provides a method for preparing the above-mentioned plantable ecological concrete for cold regions, comprising the following steps:

[0029] Mix gravel, polyether epoxy silicone oil and water evenly, add cementitious material, multi-arm polyethylene glycol amine, alkali activator, nutrient matrix, sand, water retaining agent, toughening agent and water reducing agent and mix evenly to obtain plantable ecological concrete for cold regions.

[0030] The invention discloses an application of plantable ecological concrete for cold regions, wherein the plantable ecological concrete for cold regions is sprayed or laid on a slope that needs protection and greening.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The concrete of the present invention contains a crosslinking agent which is a mixture of hydrophilic multi-arm polyethylene glycol amine and polyether epoxy silicone oil. Chemical bonds are generated at the weak interface between aggregate and cementitious material in the concrete through the reaction between amino groups and epoxy groups, forming a three-dimensional network crosslinking structure which can resist ice expansion stress, thereby effectively preventing the separation of aggregate and cementitious material and reducing the damage of ice expansion to the internal structure of concrete. The epoxy silane coupling agent modified organic silicone rubber is used as a toughening agent. The epoxy group can make it adhere well to the surface of various materials in the concrete, react with the multi-arm polyethylene glycol amine in the crosslinking agent to construct an interpenetrating network structure, and absorb and disperse stress in each freeze-thaw cycle, so that the concrete is not damaged under the action of repeated freeze-thaw stress. Cross-linking agents mainly focus on improving the strength of concrete, while toughening agents mainly focus on improving the toughness and crack resistance of concrete. The combination of the two can improve the strength of concrete while enhancing its toughness, achieving a good toughness-strength balance. In this way, during the freeze-thaw cycle, the concrete can both resist the pressure generated by the expansion of ice crystals and absorb and dissipate energy through tough deformation, thereby effectively improving the freeze-thaw resistance of ecological concrete. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with specific embodiments, but is not limited to the contents of the specification. Unless otherwise specified, the "parts" described in the embodiments of the present invention are all parts by weight. The reagents used are all commercially available reagents in the art.

[0034] The weight average molecular weight of six-arm polyethylene glycol amine was 3000 g / mol and 5000 g / mol, both of which were purchased from Kaixin Biotechnology.

[0035] The silicone rubber KMP-598 was purchased from Shin-Etsu Co., Ltd., Japan, and the average particle size was 13 μm.

[0036] Polyether epoxy silicone oil KL-80M and KL-130M were purchased from Changzhou Runqian Biotechnology Co., Ltd.;

[0037] The weight average molecular weight of KL-80M is 9000-14000 g / mol, and the epoxy value is 23 mmol / 100 g.

[0038] The weight average molecular weight of KL-130M is 9000-14000 g / mol, and the epoxy value is 12 mmol / 100 g.

[0039] Perlite bulk density 78Kg / m 3 , average particle size 2.3 mm, purchased from Chengde Stovperlite Co., Ltd.

[0040] Quartz sand was purchased from Zhongsha New Materials (Zhaoqing City) Co., Ltd.: 60wt% of quartz sand with a fineness modulus of 2.3 and 40wt% of quartz sand with a fineness modulus of 3.

[0041] 10-20 mm continuously graded stones were purchased from Shandong Baotian Stone Industry Co., Ltd.

[0042] The weight-average molecular weight of hydroxyethyl cellulose was 122,000 and it was purchased from Shanghai Zhenzhun Biotechnology Co., Ltd.

[0043] SSF-1000 series naphthalene-based high-efficiency water-reducing agent has a water-reducing rate of 21.8% and was purchased from Hubei Shanshufeng Building Materials Technology Co., Ltd.

[0044] Example 1

[0045] 1) adding 5 g of 3-(2,3-epoxypropoxy)propyltrimethoxysilane to 100 g of ethanol-water solution (ethanol mass fraction is 95 wt%) with a pH of 4.5 adjusted with acetic acid for hydrolysis, adding 100 g of silicone rubber KMP-598 for modification reaction, filtering after the reaction, washing with water for 3 times, and drying at 100° C. to constant weight to obtain the epoxysilane coupling agent modified silicone rubber;

[0046] 2) 1400g of stone (10-20mm continuous grading), 45g of KL-130M polyether epoxy silicone oil, and 100g of water are mixed evenly, and 450g of a cementitious material prepared by mixing silicate cement with a strength of 42.5, first-class fly ash, and S95-grade mineral powder in a mass ratio of 0.8:0.3:0.2, 15g of a six-arm polyethylene glycol amine with a weight average molecular weight of 3000g / mol, 80g of calcium sulfate, 20g of perlite, 200g of quartz sand, 2.5g of a water retaining agent hydroxyethyl cellulose, 20g of an epoxy silane coupling agent modified silicone rubber toughening agent, and 4g of a SSF-1000 series naphthalene-based high-efficiency water reducing agent are added and mixed evenly to obtain a plantable ecological concrete for cold regions.

[0047] Example 2

[0048] The rest is the same as Example 1, except that in step 2), the amount of KL-130M polyether epoxy silicone oil is 40 g, and the amount of multi-arm polyethylene glycol amine is 20 g.

[0049] Example 3

[0050] The rest is the same as Example 1, except that in step 2), the amount of KL-130M polyether epoxy silicone oil is 30 g, and the amount of multi-arm polyethylene glycol amine is 10 g.

[0051] Example 4

[0052] The rest is the same as Example 1, except that in step 2), KL-80M of equal mass is used instead of KL-130M.

[0053] Example 5

[0054] The rest is the same as Example 1, except that in step 2), an equal mass of six-arm polyethylene glycol amine with a weight average molecular weight of 5000 g / mol is used to replace the six-arm polyethylene glycol amine with a weight average molecular weight of 3000 g / mol.

[0055] Example 6

[0056] The rest is the same as Example 1, except that in step 2), the amount of epoxy silane coupling agent modified silicone rubber toughening agent is 30g.

[0057] Example 7

[0058] The rest is the same as Example 1, except that 2) 1600g of gravel, 45g of KL-130M polyether epoxy silicone oil, and 100g of water are mixed evenly, 450g of a cementitious material prepared by mixing silicate cement with a strength of 42.5, first-grade fly ash, and S95-grade mineral powder in a mass ratio of 0.8:0.3:0.2, 15g of a six-arm polyethylene glycol amine with a weight average molecular weight of 3000g / mol, 80g of calcium sulfate, 20g of perlite, 200g of quartz sand, 2.5g of a water retaining agent hydroxyethyl cellulose, 30g of an epoxy silane coupling agent modified silicone rubber toughening agent, and 4g of an SSF-1000 series naphthalene-based high-efficiency water reducing agent are added and mixed evenly to obtain a plantable ecological concrete for cold regions.

[0059] Comparative Example 1

[0060] The rest is the same as Example 1, except that in step 1), 3-aminopropyltrimethoxysilane is used in place of 3-(2,3-epoxypropoxy)propyltrimethoxysilane in an equal amount.

[0061] Comparative Example 2

[0062] The rest is the same as Example 1, except that in step 2), the amount of KL-130M polyether epoxy silicone oil used is 52.5 g, and the amount of multi-arm polyethylene glycol amine used is 17.5 g.

[0063] Comparative Example 3

[0064] The rest is the same as Example 1, except that in step 2), the amount of epoxy silane coupling agent modified silicone rubber toughening agent is 40g.

[0065] Comparative Example 4

[0066] The rest is the same as Example 1, except that there is no step 1), that is, the organic silicone rubber is not modified:

[0067] 1400g of gravel (10-20mm continuous grading), 45g of KL-130M polyether epoxy silicone oil, and 100g of water are mixed evenly, and 450g of a cementitious material prepared by mixing silicate cement with a strength of 42.5, first-grade fly ash, and S95-grade mineral powder in a mass ratio of 0.8:0.3:0.2, 15g of six-arm polyethylene glycol amine with a weight average molecular weight of 3000g / mol, 80g of calcium sulfate, 20g of perlite, 200g of quartz sand, 2.5g of water-retaining agent hydroxyethyl cellulose, 20g of silicone rubber KMP-598 toughening agent, and 4g of SSF-1000 series naphthalene-based high-efficiency water-reducing agent are added and mixed evenly to obtain plantable ecological concrete for cold regions.

[0068] The following performance tests were performed on the ecological concrete prepared in the above embodiments and comparative examples:

[0069] 1. Compressive strength: refer to the standard GB / T 50081-2002 Test method for mechanical properties of ordinary concrete, the specimen size is 150mm×150mm×150mm, and the loading speed is 0.3MPa / s.

[0070] 2. Porosity: The porosity shall be determined in accordance with the standard GB / T 775-2010 Technical Specification for Permeable Concrete Pavement.

[0071] 3. Frost resistance test: Refer to the slow freezing method in the standard GB / T 50082-2009 Test method for long-term performance and durability of ordinary concrete, the conditions are -25℃ / 4h+25℃ / 4h, stay at -25℃ for 2h, which is one cycle, repeat 75 cycles and retest the compressive strength.

[0072] Table 1 Performance test results

[0073] project Porosity % Compressive strength MPa Compressive strength retention rate % Example 1 20.8 27.6 95.6 Example 2 21.0 27.1 94.7 Example 3 21.7 23.5 90.4 Example 4 20.4 27.9 94.3 Example 5 20.5 26.7 95.0 Example 6 20.3 25.9 95.9 Example 7 24.5 21.8 88.5 Comparative Example 1 20.7 27.3 90.6 Comparative Example 2 26.2 18.2 81.2 Comparative Example 3 18.6 18.6 92.1 Comparative Example 4 20.7 25.0 80.8

[0074] It can be seen from Table 1 that the ecological concrete prepared by the present invention has high strength and high compressive strength retention rate, can resist freeze-thaw damage in the cold north and high-cold mining areas, and is suitable for paving on the slopes of mining areas with photovoltaic power stations that have certain strength requirements.

[0075] The above detailed description is a specific description of one feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the scope of the technical solution of the present invention.

Claims

1. A plantable ecological concrete for cold regions, characterized in that: The invention comprises the following raw materials in parts by weight: 300-450 parts of gelling material, 50-80 parts of alkali activator, 15-20 parts of nutrient matrix, 150-200 parts of sand, 1400-1600 parts of gravel, 2-3 parts of water retaining agent, 40-60 parts of cross-linking agent, 20-30 parts of toughening agent, 3.5-5 parts of water reducing agent and 80-100 parts of water; the cross-linking agent is a mixture of multi-arm polyethylene glycol amine and polyether epoxy silicone oil in a mass ratio of 1:2-3, and the toughening agent is epoxy silane coupling agent modified silicone rubber.

2. The plantable ecological concrete for cold regions according to claim 1 is characterized in that: The multi-arm polyethylene glycol amine has a weight average molecular weight of 3000-5000 g / mol and is selected from one or a combination of two or more of four-arm polyethylene glycol amine, six-arm polyethylene glycol amine and eight-arm polyethylene glycol amine, preferably six-arm polyethylene glycol amine; the epoxy value of the polyether epoxy silicone oil is 12-25 mmol / 100g.

3. The plantable ecological concrete for cold regions according to claim 1 is characterized in that: The epoxy silane coupling agent modified silicone rubber is prepared by a method comprising the following steps: The epoxy silane coupling agent is added to the hydrolysis solution for hydrolysis, and the organic silicone rubber is added for modification reaction. After the reaction is completed, the organic silicone rubber is filtered, washed and dried to obtain the epoxy silane coupling agent modified organic silicone rubber.

4. The plantable ecological concrete for cold regions according to claim 3 is characterized in that: The hydrolyzate is prepared by mixing ethanol and water into an alcohol-water solution, and then adding acetic acid to adjust the pH to 4.5-5.5, wherein the mass fraction of ethanol in the alcohol-water solution is 90-95wt%; the epoxy silane coupling agent accounts for 3-5wt% of the hydrolyzate; the epoxy silane coupling agent is 3-5wt% of the silicone rubber.

5. The plantable ecological concrete for cold regions according to claim 1 is characterized in that: The epoxysilane coupling agent is selected from 3-(2,3-epoxypropyloxy)propyltrimethoxysilane, 3-(2,3-epoxypropyloxy)propyltriethoxysilane, 3-(2,3-epoxypropyloxy)propylmethyldimethoxysilane, 3-(2,3-epoxypropyloxy)propylmethyldiethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane, 2-(3,4-epoxycyclohexyl)ethylmethyldimethoxysilane and 2-(3,4-epoxycyclohexyl)ethylmethyldiethoxysilane, or a combination of two or more thereof.

6. The plantable ecological concrete for cold regions according to claim 1 is characterized in that: The average particle size of the organic silicone rubber is 5-15 μm, and is selected from one or a combination of two or more of Japan Shin-Etsu KMP-594, KMP-597, and KMP-598.

7. The plantable ecological concrete for cold regions according to claim 1 is characterized in that: The cementitious material is prepared by mixing cement, fly ash and mineral powder in a mass ratio of 0.6-0.8:0.2-0.3:0.2-0.3; The cement is silicate cement with a strength of 42.5-52.5; The fly ash is selected from one of primary fly ash and secondary fly ash, or a combination of two or more thereof; The mineral powder is selected from one of S105 grade mineral powder, S95 grade mineral powder, S75 grade mineral powder, or a combination of two or more thereof.

8. The plantable ecological concrete for cold regions according to claim 1 is characterized in that: The alkaline activator is selected from one or a combination of sodium sulfate, calcium sulfate, and sodium carbonate; the nutrient matrix is ​​selected from one or a combination of two or more of vermiculite, perlite, peat, and organic fertilizer; preferably, the bulk density is 50-80 kg / m 3 , the perlite has an average particle size of 0.5-3mm; the sand fineness modulus is 2.3-3; the gravel is 10-20mm continuously graded gravel.

9. The method for preparing the plantable ecological concrete for cold regions according to any one of claims 1 to 8, characterized in that: The steps include: Mix gravel, polyether epoxy silicone oil and water evenly, add cementitious material, multi-arm polyethylene glycol amine, alkali activator, nutrient matrix, sand, water retaining agent, toughening agent and water reducing agent and mix evenly to obtain plantable ecological concrete for cold regions.

10. The application of the plantable ecological concrete for cold regions according to any one of claims 1 to 8, characterized in that: The cold zone plantable ecological concrete is sprayed or laid on the slopes that need protection and greening.