Method for protecting river bank side slope through porous ecological concrete with in-situ deodorization function

Abstract

The invention provides a method for protecting a river bank side slope through porous ecological concrete with an in-situ deodorization function. The method comprises the steps that prefabricated porous ecological concrete blocks are provided; comprising a bio-based porous concrete carrier and a mixed bacteria solution loaded on the bio-based porous concrete carrier, the bio-based porous concrete carrier comprises cement paste with coarse aggregate and saccharomyces cerevisiae liquid doped with cetyltrimethylammonium bromide; the particle size of the coarse aggregate is 10-20 mm; the concentration of the hexadecyl trimethyl ammonium bromide in the saccharomyces cerevisiae liquid is 0.2%-0.8%; the mixed bacterial liquid comprises a bacillus subtilis bacterial agent and a lactobacillus casei bacterial agent in a mixing ratio of (1: 0.3)-(1: 2); the prefabricated concrete sash beams are fixed on the river bank side slope through anchor rods, cement mortar, reinforcing steel bars and concrete; the prefabricated porous ecological concrete blocks are arranged in the sash in the concrete sash beam, and the porous ecological concrete blocks are fixed in the concrete sash beam through cement mortar.

Description

Technical Field

[0001] The present application relates to the technical field of slope protection, and in particular to a method for protecting riverbank slopes with porous ecological concrete having an in-situ deodorization function. Background Art

[0002] As the intensity of development and utilization of mountains and rivers in the natural environment gradually increases, the lack of timely process control and preventive management and construction in riverside slope areas such as river banks and dams has brought potential threats to the ecological environment of rivers and slopes. In addition, in urban industrial areas and residential areas, rural areas and downstream areas of rivers, due to imperfect sewage and wastewater treatment, accumulation of organic pollutants and other reasons, the dissolved oxygen level in the river water has decreased, organic matter has decomposed and produced malodorous gases such as hydrogen sulfide, ammonia and odor. It is imperative to protect the natural water cycle and reduce river pollution.

[0003] In the related art, there are problems in slope protection such as single slope protection function and insufficient stability of slope protection. Summary of the invention

[0004] In view of this, the purpose of this application is to propose a method for protecting river bank slopes with porous ecological concrete having in-situ deodorization function.

[0005] Based on the above purpose, the present application provides a method for protecting riverbank slopes with porous ecological concrete having an in-situ deodorization function, comprising:

[0006] A prefabricated porous ecological concrete block is provided; the prefabricated porous ecological concrete block comprises a bio-based porous concrete carrier and a mixed bacterial solution loaded on the bio-based porous concrete carrier; wherein the bio-based porous concrete carrier comprises a cement paste with coarse aggregate and a saccharomyces cerevisiae bacterial solution doped with hexadecyltrimethylammonium bromide; the particle size of the coarse aggregate is 10 mm to 20 mm; the concentration of the hexadecyltrimethylammonium bromide in the saccharomyces cerevisiae bacterial solution is 0.2% to 0.8%; the mixed bacterial solution comprises a Bacillus subtilis bacterial agent and a Lactobacillus casei bacterial agent in a mixing ratio of (1:0.3) to (1:2);

[0007] Prefabricated concrete frame beams are fixed on the river bank slope by anchor rods, cement mortar, steel bars and concrete;

[0008] The prefabricated porous ecological concrete blocks are placed in the frames in the concrete frame beams, and the porous ecological concrete is fixed in the concrete frame beams by cement mortar.

[0009] In some embodiments, the method further comprises preparing the prefabricated porous eco-concrete block by the following method:

[0010] preparing the bio-based porous concrete carrier;

[0011] preparing the mixed bacterial solution;

[0012] The bio-based porous concrete carrier is immersed in the mixed bacterial solution.

[0013] In some embodiments, the preparation of the bio-based porous concrete carrier comprises:

[0014] Mix cement, microsilica powder for concrete, a water reducer and water, and stir to obtain a gel material; mix the coarse aggregate with the gel material and stir to obtain the cement slurry with the coarse aggregate;

[0015] Putting the saccharomyces cerevisiae liquid doped with hexadecyltrimethylammonium bromide into a foaming machine for foaming; the saccharomyces cerevisiae liquid is the saccharomyces cerevisiae liquid that has been fermented;

[0016] The foamed product is added into the cement slurry with coarse aggregate, stirred and then formed in a mold.

[0017] In some embodiments, the preparation of the mixed bacterial solution includes:

[0018] Bacillus subtilis is cultured in MRS medium for 10 to 25 hours to obtain a Bacillus subtilis inoculum; Lactobacillus casei is cultured in MRS medium for 15 to 30 hours to obtain a Lactobacillus casei inoculum;

[0019] The Bacillus subtilis inoculant and the Lactobacillus casei inoculant are mixed in a mixing ratio of (1:0.3)-(1:2) to prepare a mixed bacterial solution.

[0020] In some embodiments, the mass ratio of water to cement is 0.2-0.4; the microsilica powder specially used for concrete accounts for 5%-10% of the mass of the cement; the water reducer accounts for 0.1%-0.3% of the mass of the cement; and the coarse aggregate is pebbles.

[0021] In some embodiments, the soaking treatment lasts for 20 to 90 minutes.

[0022] In some of the embodiments, in a direction away from the ground, the prefabricated porous eco-concrete block is flush with the surface of the concrete lattice beam.

[0023] In some of the embodiments, the connection between the prefabricated porous eco-concrete block and the concrete lattice beam is filled with mortar.

[0024] In some of the embodiments, the concrete lattice beam is embedded in the slope surface of the river bank slope by 19-21 cm.

[0025] In some of the embodiments, the water-cement ratio of the cement mortar is 0.45-0.55; the cement-sand ratio is (0.9:1) to (1.1:1).

[0026] As can be seen from the above, the method for protecting riverbank slopes with porous ecological concrete having an in-situ deodorization function provided by the present application comprises providing a prefabricated porous ecological concrete block; the prefabricated porous ecological concrete block comprises a bio-based porous concrete carrier and a mixed bacterial solution loaded on the bio-based porous concrete carrier; wherein the bio-based porous concrete carrier comprises a cement slurry having a coarse aggregate and a saccharomyces cerevisiae bacterial solution doped with hexadecyltrimethylammonium bromide; the particle size of the coarse aggregate is 10 mm to 20 mm; the concentration of the hexadecyltrimethylammonium bromide in the saccharomyces cerevisiae bacterial solution is 0.2% to 1.0%. 0.8%; the mixed bacterial liquid includes Bacillus subtilis and Lactobacillus casei in a mixing ratio of (1:0.3)-(1:2); the prefabricated concrete lattice beam is fixed on the river bank slope by anchor rods, cement mortar, steel bars and concrete; the prefabricated porous ecological concrete blocks are placed in the frames in the concrete lattice beams, and the porous ecological concrete is fixed in the concrete lattice beams by cement mortar, which can combine deodorizing microorganisms with bio-based porous concrete, simultaneously realize slope ecological protection and in-situ decomposition of malodorous gases, and effectively control soil erosion on the river bank slope and runoff odor pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic flow chart of a method for protecting riverbank slopes with porous ecological concrete having an in-situ deodorization function according to an embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the structure formed by the porous ecological concrete riverbank slope protection method of an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0031] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] At present, common slope protection forms mainly include traditional engineering slope protection such as stone slope protection, concrete slope protection and shotcrete slope protection, ecological slope protection forms such as plant slope protection and vegetated concrete slope protection, and slope protection forms that combine engineering and ecological slope protection. Among them, porous concrete slope protection is an ecological slope protection technology with "breathing function". It is mainly composed of porous concrete materials, porous concrete pore filling materials, surface covering materials and plants and animals. Its high porosity provides plants, animals and microorganisms with good living space and habitats, and can exchange energy between water and land. It has the advantages of strong integrity, good anti-scouring performance, and low requirements for riverbank soil and riverbank slope. It has received widespread attention in the field of river regulation engineering. However, porous concrete technology still has certain limitations, such as low porosity of porous concrete, concrete medium is not conducive to the growth of plants, animals and microorganisms, etc. It is necessary to supplement the growth matrix in the porous concrete preparation process and filling materials to enhance its durability and ecological restoration effect. In addition, the biological treatment of black and smelly water bodies in rivers is a process that uses microorganisms to degrade or convert organic pollutants in smelly gases into harmless or low-harmful substances. Compared with other physical and chemical methods, it has the advantages of low investment, low operating costs, simple equipment, high treatment efficiency, and no secondary pollution. It is suitable for the purification of low-concentration odorous gases and has become an important development direction of odor control technology.

[0033] In a related technology, by planting plants in the planting holes and using them to absorb and remove pollutants, green plants can also build natural landscapes and ecological environments, thereby achieving continuous water purification and forming a strong, stable, effective and beautiful green ecological retaining wall. However, in order to remove pollutants, it is necessary to manually harvest the plants after they grow to a certain stage, which is prone to secondary pollution. In another related technology, ecological porous concrete is used to achieve comprehensive utilization of industrial waste, but the stability is not good enough and it cannot have both river bank protection and water purification functions.

[0034] Based on this, the embodiments of the present application provide a method for protecting riverbank slopes with porous ecological concrete with in-situ deodorization function. By combining deodorizing microorganisms with bio-based porous concrete, slope ecological protection and in-situ decomposition of malodorous gases are simultaneously achieved, thereby effectively controlling soil erosion on riverbank slopes and runoff odor pollution.

[0035] like Figure 1 As shown, the embodiment of the present application provides a method for protecting riverbank slopes with porous ecological concrete having an in-situ deodorization function, which may include:

[0036] Step S100, providing a prefabricated porous ecological concrete block; the prefabricated porous ecological concrete block comprises a bio-based porous concrete carrier and a mixed bacterial solution loaded on the bio-based porous concrete carrier; wherein the bio-based porous concrete carrier comprises a cement slurry with coarse aggregate and a saccharomyces cerevisiae bacterial solution doped with hexadecyltrimethylammonium bromide; the particle size of the coarse aggregate is 10 mm to 20 mm; the concentration of hexadecyltrimethylammonium bromide in the saccharomyces cerevisiae bacterial solution is 0.2% to 0.8%; the mixed bacterial solution comprises a Bacillus subtilis inoculant and a Lactobacillus casei inoculant in a mixing ratio of (1:0.3) to (1:2);

[0037] Step S200, fixing the prefabricated concrete frame beam on the river bank slope by means of anchor rods, cement mortar, steel bars and concrete;

[0038] Step S300, placing the prefabricated porous ecological concrete block in the concrete frame beam, and fixing the porous ecological concrete in the concrete frame beam by cement mortar, such as Figure 2 shown.

[0039] The method for protecting riverbank slopes with porous ecological concrete with in-situ deodorization function provided in the embodiment of the present application is to prepare bio-based porous ecological concrete prefabricated blocks, fix the deodorizing microorganisms in the porous structure of the porous concrete carrier, and assemble and stack them on the inclined slopes on both sides of the river bank. This can to a certain extent solve the problems of single slope protection function and insufficient slope stability in the prior art of slope protection.

[0040] In some embodiments, in step S100, the prefabricated porous ecological concrete block can be obtained by directly mixing the cement slurry raw material used to make the bio-based porous concrete carrier with the mixed bacterial liquid. This method has the advantages of simplifying the preparation process and the preparation process.

[0041] In some embodiments, in step S100, the prefabricated porous eco-concrete block can be prepared by the following method:

[0042] preparing the bio-based porous concrete carrier;

[0043] preparing the mixed bacterial solution;

[0044] The bio-based porous concrete carrier is immersed in the mixed bacterial solution.

[0045] Compared with the prefabricated porous ecological concrete blocks prepared by directly mixing the cement slurry raw materials used to make the bio-based porous concrete carrier with the mixed bacterial liquid, the prefabricated porous ecological concrete blocks prepared by this method can increase the contact area between each microorganism in the mixed bacterial liquid and the water body, improve the reliability of the proportion of microorganisms in the mixed bacterial liquid, and have the advantages of being conducive to the continuous growth of microorganisms and having good stability.

[0046] In some embodiments, preparing the bio-based porous concrete carrier may include:

[0047] Mix cement, microsilica powder for concrete, polycarboxylic acid high-performance water-reducing agent and water, and stir to obtain a gel material; mix and stir the coarse aggregate with the gel material to obtain the cement slurry with the coarse aggregate;

[0048] Putting the saccharomyces cerevisiae liquid doped with hexadecyltrimethylammonium bromide into a foaming machine for foaming;

[0049] The foamed product is added into the cement slurry with coarse aggregate, stirred and then formed in a mold.

[0050] In some embodiments, in the step of preparing the cement slurry with aggregate, the mass ratio of water to the cement (i.e., water-cement ratio) can be 0.2-0.4. The water-cement ratio in this range can make the bio-based porous concrete carrier have good concrete strength and durability.

[0051] In some embodiments, the microsilica fume for concrete accounts for 5%-10% of the mass of the cement (that is, the amount of microsilica fume for concrete is 5%-10% of the amount of cement). Generally, the minimum SiO2 content in the microsilica fume for concrete is 90%-95%. The use of microsilica fume for concrete with this mass fraction can reduce the bleeding and segregation of the bio-based porous concrete carrier.

[0052] In some embodiments, the water reducer may account for 0.1%-0.3% of the mass of the cement (that is, the amount of the polycarboxylic acid high-performance water reducer is 0.1%-0.3% of the amount of cement). The water reducer may be a polycarboxylic acid high-performance water reducer. By selecting such a water reducer with such a mass fraction, the amount of cement may be appropriately reduced, thereby reducing costs, while maintaining the strength of the concrete.

[0053] In some of these embodiments, the coarse aggregate may be pebbles.

[0054] In some embodiments, the saccharomyces cerevisiae liquid can be a saccharomyces cerevisiae liquid that has been fermented. Biological foam can be obtained by doping hexadecyltrimethylammonium bromide into the saccharomyces cerevisiae liquid and foaming it in a foaming machine. By doping hexadecyltrimethylammonium bromide with a volume concentration of 0.2% to 0.8% in the saccharomyces cerevisiae liquid and foaming it as a foaming agent, the yeast liquid can be evenly mixed in the cement slurry, and has a strong binding force and compatibility with the mixed liquid of the deodorizing microorganisms (i.e., Bacillus subtilis agent and Lactobacillus casei agent) added subsequently.

[0055] In some embodiments, the yeast culture liquid can be obtained by the following method: prepare YPD culture medium for yeast, divide the prepared YPD culture medium into two conical bottles and sterilize them in a high-pressure steam sterilizer, then take them out and place them on a sterile operating table to cool to room temperature, inoculate yeast mother liquid, and place them in a constant temperature shaking incubator for shaking culture for 24 hours to obtain yeast culture liquid. Yeast can also play a certain deodorizing role in the subsequent porous ecological concrete blocks.

[0056] In some embodiments, preparing the mixed bacterial solution may include:

[0057] Provide an MRS culture medium. The MRS culture medium of the embodiments of the present application may be an existing MRS culture medium, and the embodiments of the present application do not involve improvements to the existing MRS culture medium. In some of the embodiments, the configured MRS culture medium may be dispensed into conical flasks and sterilized in a high pressure steam autoclave, and then taken out and placed on a sterile operating table to cool to room temperature.

[0058] Inoculate the Bacillus subtilis mother liquid in the MRS medium and culture for 10 to 25 hours to obtain the Bacillus subtilis inoculum; culture Lactobacillus casei in the MRS medium for 15 to 30 hours to obtain the Lactobacillus casei inoculum. Generally, the Bacillus subtilis mother liquid or the Lactobacillus casei mother liquid can be inoculated into the MRS medium and placed in a constant temperature shaking incubator for shaking culture. Among them, good ventilation needs to be maintained during the culture of Bacillus subtilis.

[0059] The Bacillus subtilis agent and the Lactobacillus casei agent are mixed in a mixing ratio of (1:0.3)-(1:2) to prepare a mixed bacterial solution. By selecting the mixed bacterial solution with this mixing ratio, the synergistic degradation effect of the Bacillus subtilis agent and the Lactobacillus casei agent can be effectively exerted, the protease and lipase produced by Bacillus subtilis decompose organic matter, and Lactobacillus casei produces substances such as lactic acid, changes the pH value of the environment, inhibits the growth of microorganisms that produce malodorous gases such as sulfur bacteria and ammonifying bacteria to a certain extent, and can also jointly maintain a stable bacterial community structure to a certain extent, realize the continuous and effective decomposition and inhibition of odorous substances, and thus have a good in-situ deodorization effect.

[0060] In some embodiments, the soaking treatment may last for 20 to 90 minutes. Through the soaking treatment of this duration, as much mixed bacterial liquid as possible can be adsorbed onto the bio-based porous concrete carrier, and too long an adsorption time can be avoided to cause too many bacterial species and poor growth in the later stage.

[0061] In some embodiments, the method of fixing the prefabricated concrete lattice beam on the river bank slope by anchor rods, cement mortar, steel bars and concrete may include:

[0062] The anchor hole position is accurately measured and laid out on the river bank slope, and the hole is drilled to obtain the anchor hole. The anchor rod body whose end is used for welding to the frame beam reinforcement is placed in the drilled hole. Usually, the drilling can be dry drilling. The drilled hole is cleaned and inspected after drilling. The rod body of the anchor rod can be a Φ32 threaded steel bar. After the anchor rod body is placed in the hole, the length of the anchor rod part exposed outside the hole can be measured with a steel ruler, and the length of the anchor rod in the hole can be calculated (the error is controlled within the range of ±50mm) to ensure that the anchoring length is sufficient and improve the anchoring effect.

[0063] The anchor hole is grouted to better fix the anchor. Usually, the grouting pressure may be no less than 2.5 MPa, and the grouting material (such as cement mortar) may be cement mortar with a water-cement ratio of 0.5 and a cement-sand ratio of 1:1.

[0064] The outer frame of the prefabricated concrete lattice beam is assembled at the prefabricated position and embedded in the slope. Among them, the inner frame of the concrete lattice beam can be laid in a diamond-shaped frame in a 45° oblique direction and intersected vertically and horizontally, and assembled according to the reserved position.

[0065] In some embodiments, the frame can be embedded in the slope 20cm. Usually, a pit with a depth of about 25cm can be dug first, and then the bottom surface is leveled with 5cm cement mortar, and then the steel bars are made and installed, and the tail of the anchor rod is welded to the frame steel bar into a whole.

[0066] Concrete is poured on the concrete frame beam. When pouring, a 2 cm wide expansion joint is left at the contact point of adjacent frames. In some embodiments, C25 concrete can be used for pouring. When pouring, vibration can be performed at the densely reinforced areas around the anchor holes to improve the effect after pouring. Asphalt-soaked wooden boards can be used for filling at the expansion joints.

[0067] The technical solution of the present invention is further described below in conjunction with specific implementation methods.

[0068] The experimental methods in the following examples are all conventional methods unless otherwise specified.

[0069] Unless otherwise specified, the test materials used in the following examples were purchased from conventional biochemical reagent stores and conventional building material stores.

[0070] Example 1

[0071] Test method: Step 1, preparation of bio-based porous concrete carrier

[0072] (1) 10 kg of cement, 0.7 kg of concrete-specific microsilica powder, 0.02 kg of polycarboxylic acid high-performance water reducer and 2.5 kg of city tap water were mixed and put into a cement slurry mixer and stirred for 30 seconds to obtain a cementitious material;

[0073] (2) mixing high-quality goose egg coarse aggregate with a particle size of 10-20 mm with the cementitious material in (1) and manually stirring for 90 seconds to obtain a coarse aggregate cement slurry;

[0074] (3) taking the cultured yeast saccharomyces cerevisiae liquid and adding hexadecyltrimethylammonium bromide, and foaming with a foaming machine to obtain foam; wherein the concentration of the hexadecyltrimethylammonium bromide in the yeast saccharomyces cerevisiae liquid is 0.5%;

[0075] (4) Add the foam prepared in (3) to the coarse aggregate cement slurry prepared in (2) and mix well. Mold in a 300 mm × 300 mm × 300 mm mold for 24 hours, demould, and cure for 28 days for use.

[0076] Step 2: Prepare Bacillus subtilis and Lactobacillus casei inoculants and fix them on a bio-based porous concrete carrier

[0077] (1) MRS medium is prepared for Bacillus subtilis and Lactobacillus casei;

[0078] (2) The culture medium prepared in (1) is divided into two conical flasks and sterilized in a high-pressure steam sterilizer. The flasks are then taken out and placed on a sterile operating table to cool to room temperature. The flasks are inoculated with Bacillus subtilis mother liquor and Lactobacillus casei mother liquor, respectively, and placed in a constant temperature shaking incubator for shaking culture. The Bacillus subtilis mother liquor is cultured for 15 hours, and the Lactobacillus casei mother liquor is cultured for 18 hours to obtain two microbial agents.

[0079] (3) Bacillus subtilis and Lactobacillus casei were mixed in a ratio of 1:1 to prepare a mixed bacterial solution, and the bio-based porous concrete carrier was immersed in the microbial bacterial solution for 90 minutes to fix the deodorizing microorganisms on the bio-based porous concrete carrier, thereby obtaining a prefabricated porous ecological concrete block.

[0080] Step 3: Fixing and assembling concrete frame beams

[0081] (1) Accurately measure and lay out the anchor hole position on the slope surface. The drilling is required to be cleaned and inspected after dry drilling. The anchor rod body is made of Φ32 threaded steel bars. The anchor rod end should be welded to the frame beam steel bar. Put the anchor rod body into the hole, measure the length of the steel rod exposed outside the hole with a steel ruler, calculate the anchor rod length in the hole (the error is controlled within the range of ±50mm), and ensure the anchoring length.

[0082] (2) Use secondary high-pressure splitting grouting to grout the anchor holes. The grouting pressure is not less than 2.5 MPa. The grouting material is cement mortar with a water-cement ratio of 0.5 and a cement-sand ratio of 1:1.

[0083] (3) The outer frame and inner frame templates of the concrete frame beam are 2m*2m in size and are positioned and marked according to the design and actual site conditions. The inner frame is laid in a diamond-shaped frame at a 45° angle and intersected vertically and horizontally, and assembled according to the reserved positions. The frame is embedded 20cm into the slope and excavated manually. The foundation is first leveled with 5cm cement mortar, and then the steel bars are manufactured and installed. The tail of the anchor rod is welded to the frame steel bar to form a whole.

[0084] (4) Concrete is poured on the installed frame beam using C25 concrete. During pouring, the densely reinforced areas around the anchor holes should be vibrated carefully to ensure quality. The frame is constructed in pieces, and a 2 cm wide expansion joint is left at the contact between two adjacent frames. It is filled with asphalt-soaked wooden boards to form the concrete frame beam. The gravity of the precast concrete frame beam is used to suppress the slope and play a protective role.

[0085] Step 4: Fix the porous eco-concrete blocks.

[0086] (1) The porous eco-concrete prefabricated block is placed in the diamond-shaped frame formed on the inner side of the concrete frame beam and compacted. The diamond-shaped frame is tightly connected to the porous eco-concrete block on all sides, and the surfaces are at the same height.

[0087] (2) Use a mixer to centrally mix the mortar and embed the mortar into the gaps between the porous ecological concrete blocks and the frame. The mortar should maintain appropriate workability and fluidity and be used immediately after mixing. During masonry, the mortar should be full and dense. The mortar should be constructed by sitting mortar and compacting. The joints should be staggered, the slope should be flat, the joints should be tight, and the mortar should be firm and beautiful.

[0088] Example 2

[0089] Test method: Step 1, preparation of bio-based porous concrete carrier

[0090] (1) 10 kg of cement, 0.7 kg of concrete-specific microsilica powder, 0.02 kg of polycarboxylic acid high-performance water reducer and 2.5 kg of city tap water were mixed and put into a cement slurry mixer and stirred for 30 seconds to obtain a cementitious material;

[0091] (2) mixing high-quality goose egg coarse aggregate with a particle size of 10-20 mm with the cementitious material in (1) and manually stirring for 90 seconds to obtain a coarse aggregate cement slurry;

[0092] (3) taking the cultured yeast saccharomyces cerevisiae liquid and adding hexadecyltrimethylammonium bromide, and foaming with a foaming machine to obtain foam; wherein the concentration of the hexadecyltrimethylammonium bromide in the yeast saccharomyces cerevisiae liquid is 0.2%;

[0093] (4) Add the foam prepared in (3) to the coarse aggregate cement slurry prepared in (2) and mix well. Mold in a 300 mm × 300 mm × 300 mm mold for 24 hours, demould, and cure for 28 days for use.

[0094] Step 2: Prepare Bacillus subtilis and Lactobacillus casei inoculants and fix them on a bio-based porous concrete carrier

[0095] (1) MRS medium is prepared for Bacillus subtilis and Lactobacillus casei;

[0096] (2) The culture medium prepared in (1) is divided into two conical flasks and sterilized in a high-pressure steam sterilizer. The flasks are then taken out and placed on a sterile operating table to cool to room temperature. The flasks are inoculated with Bacillus subtilis mother liquor and Lactobacillus casei mother liquor, respectively, and placed in a constant temperature shaking incubator for shaking culture. The Bacillus subtilis mother liquor is cultured for 15 hours, and the Lactobacillus casei mother liquor is cultured for 18 hours to obtain two microbial agents.

[0097] (3) Bacillus subtilis and Lactobacillus casei were mixed in a ratio of 1:0.3 to prepare a mixed bacterial solution, and the bio-based porous concrete carrier was immersed in the microbial bacterial solution for 90 minutes to fix the deodorizing microorganisms on the bio-based porous concrete carrier, thereby obtaining a prefabricated porous ecological concrete block.

[0098] Step 3: Fixing and assembling concrete frame beams

[0099] (1) Accurately measure and lay out the anchor hole position on the slope surface. The drilling is required to be cleaned and inspected after dry drilling. The anchor rod body is made of Φ32 threaded steel bars. The anchor rod end should be welded to the frame beam steel bar. Put the anchor rod body into the hole, measure the length of the steel rod exposed outside the hole with a steel ruler, calculate the anchor rod length in the hole (the error is controlled within the range of ±50mm), and ensure the anchoring length.

[0100] (2) Use secondary high-pressure splitting grouting to grout the anchor holes. The grouting pressure is not less than 2.5 MPa. The grouting material is cement mortar with a water-cement ratio of 0.5 and a cement-sand ratio of 1:1.

[0101] (3) The outer frame and inner frame templates of the concrete frame beam are 2m*2m in size and are positioned and marked according to the design and actual site conditions. The inner frame is laid in a diamond-shaped frame at a 45° angle and intersected vertically and horizontally, and assembled according to the reserved positions. The frame is embedded 20cm into the slope and excavated manually. The foundation is first leveled with 5cm cement mortar, and then the steel bars are manufactured and installed. The tail of the anchor rod is welded to the frame steel bar to form a whole.

[0102] (4) Concrete is poured on the installed frame beam using C25 concrete. During pouring, the densely reinforced areas around the anchor holes should be vibrated carefully to ensure quality. The frame is constructed in pieces, and a 2 cm wide expansion joint is left at the contact between two adjacent frames. It is filled with asphalt-soaked wooden boards to form the concrete frame beam. The gravity of the precast concrete frame beam is used to suppress the slope and play a protective role.

[0103] Step 4: Fix the porous eco-concrete blocks.

[0104] (1) The porous eco-concrete prefabricated block is placed in the diamond-shaped frame formed on the inner side of the concrete frame beam and compacted. The diamond-shaped frame is tightly connected to the porous eco-concrete block on all sides, and the surfaces are at the same height.

[0105] (2) Use a mixer to centrally mix the mortar and embed the mortar into the gaps between the porous ecological concrete blocks and the frame. The mortar should maintain appropriate workability and fluidity and be used immediately after mixing. During masonry, the mortar should be full and dense. The mortar should be constructed by sitting mortar and compacting. The joints should be staggered, the slope should be flat, the joints should be tight, and the mortar should be firm and beautiful.

[0106] Example 3

[0107] Test method: Step 1, preparation of bio-based porous concrete carrier

[0108] (1) 10 kg of cement, 0.7 kg of concrete-specific microsilica powder, 0.02 kg of polycarboxylic acid high-performance water reducer and 2.5 kg of city tap water were mixed and put into a cement slurry mixer and stirred for 30 seconds to obtain a cementitious material;

[0109] (2) mixing high-quality goose egg coarse aggregate with a particle size of 10-20 mm with the cementitious material in (1) and manually stirring for 90 seconds to obtain a coarse aggregate cement slurry;

[0110] (3) taking the cultured yeast saccharomyces cerevisiae liquid and adding hexadecyltrimethylammonium bromide, and foaming with a foaming machine to obtain foam; wherein the concentration of the hexadecyltrimethylammonium bromide in the yeast saccharomyces cerevisiae liquid is 0.8%;

[0111] (4) Add the foam prepared in (3) to the coarse aggregate cement slurry prepared in (2) and mix well. Mold in a 300 mm × 300 mm × 300 mm mold for 24 hours, demould, and cure for 28 days for use.

[0112] Step 2: Prepare Bacillus subtilis and Lactobacillus casei inoculants and fix them on a bio-based porous concrete carrier

[0113] (1) MRS medium is prepared for Bacillus subtilis and Lactobacillus casei;

[0114] (2) The culture medium prepared in (1) is divided into two conical flasks and sterilized in a high-pressure steam sterilizer. The flasks are then taken out and placed on a sterile operating table to cool to room temperature. The flasks are inoculated with Bacillus subtilis mother liquor and Lactobacillus casei mother liquor, respectively, and placed in a constant temperature shaking incubator for shaking culture. The Bacillus subtilis mother liquor is cultured for 15 hours, and the Lactobacillus casei mother liquor is cultured for 18 hours to obtain two microbial agents.

[0115] (3) Bacillus subtilis and Lactobacillus casei were mixed in a ratio of 1:2 to prepare a mixed bacterial solution, and the bio-based porous concrete carrier was immersed in the microbial bacterial solution for 90 minutes to fix the deodorizing microorganisms on the bio-based porous concrete carrier, thereby obtaining a prefabricated porous ecological concrete block.

[0116] Step 3: Fixing and assembling concrete frame beams

[0117] (1) Accurately measure and lay out the anchor hole position on the slope surface. The drilling is required to be cleaned and inspected after dry drilling. The anchor rod body is made of Φ32 threaded steel bars. The anchor rod end should be welded to the frame beam steel bar. Put the anchor rod body into the hole, measure the length of the steel rod exposed outside the hole with a steel ruler, calculate the anchor rod length in the hole (the error is controlled within the range of ±50mm), and ensure the anchoring length.

[0118] (2) Use secondary high-pressure splitting grouting to grout the anchor holes. The grouting pressure is not less than 2.5 MPa. The grouting material is cement mortar with a water-cement ratio of 0.5 and a cement-sand ratio of 1:1.

[0119] (3) The outer frame and inner frame templates of the concrete frame beam are 2m*2m in size and are positioned and marked according to the design and actual site conditions. The inner frame is laid in a diamond-shaped frame at a 45° angle and intersected vertically and horizontally, and assembled according to the reserved positions. The frame is embedded 20cm into the slope and excavated manually. The foundation is first leveled with 5cm cement mortar, and then the steel bars are manufactured and installed. The tail of the anchor rod is welded to the frame steel bar to form a whole.

[0120] (4) Concrete is poured on the installed frame beam using C25 concrete. During pouring, the densely reinforced areas around the anchor holes should be vibrated carefully to ensure quality. The frame is constructed in pieces, and a 2 cm wide expansion joint is left at the contact between two adjacent frames. It is filled with asphalt-soaked wooden boards to form the concrete frame beam. The gravity of the precast concrete frame beam is used to suppress the slope and play a protective role.

[0121] Step 4: Fix the porous eco-concrete blocks.

[0122] (1) The porous eco-concrete prefabricated block is placed in the diamond-shaped frame formed on the inner side of the concrete frame beam and compacted. The diamond-shaped frame is tightly connected to the porous eco-concrete block on all sides, and the surfaces are at the same height.

[0123] (2) Use a mixer to centrally mix the mortar and embed the mortar into the gaps between the porous ecological concrete blocks and the frame. The mortar should maintain appropriate workability and fluidity and be used immediately after mixing. During masonry, the mortar should be full and dense. The mortar should be constructed by sitting mortar and compacting. The joints should be staggered, the slope should be flat, the joints should be tight, and the mortar should be firm and beautiful.

[0124] Example 4

[0125] Test method: Step 1, preparation of bio-based porous concrete carrier

[0126] (1) 10 kg of cement, 0.7 kg of concrete-specific microsilica powder, 0.02 kg of polycarboxylic acid high-performance water reducer and 2.5 kg of city tap water were mixed and put into a cement slurry mixer and stirred for 30 seconds to obtain a cementitious material;

[0127] (2) mixing high-quality goose egg coarse aggregate with a particle size of 10-20 mm with the cementitious material in (1) and manually stirring for 90 seconds to obtain a coarse aggregate cement slurry;

[0128] (3) taking the cultured yeast saccharomyces cerevisiae liquid and adding hexadecyltrimethylammonium bromide, and foaming with a foaming machine to obtain foam; wherein the concentration of the hexadecyltrimethylammonium bromide in the yeast saccharomyces cerevisiae liquid is 0.2%;

[0129] (4) Add the foam prepared in (3) to the coarse aggregate cement slurry prepared in (2) and mix well. Mold in a 300 mm × 300 mm × 300 mm mold for 24 hours, demould, and cure for 28 days for use.

[0130] Step 2: Prepare Bacillus subtilis and Lactobacillus casei inoculants and fix them on a bio-based porous concrete carrier

[0131] (1) MRS medium is prepared for Bacillus subtilis and Lactobacillus casei;

[0132] (2) The culture medium prepared in (1) is divided into two conical flasks and sterilized in a high-pressure steam sterilizer. The flasks are then taken out and placed on a sterile operating table to cool to room temperature. The flasks are inoculated with Bacillus subtilis mother liquor and Lactobacillus casei mother liquor, respectively, and placed in a constant temperature shaking incubator for shaking culture. The Bacillus subtilis mother liquor is cultured for 15 hours, and the Lactobacillus casei mother liquor is cultured for 18 hours to obtain two microbial agents.

[0133] (3) Bacillus subtilis and Lactobacillus casei were mixed in a ratio of 1:0.3 to prepare a mixed bacterial solution, and the bio-based porous concrete carrier was immersed in the microbial bacterial solution for 90 minutes to fix the deodorizing microorganisms on the bio-based porous concrete carrier, thereby obtaining a prefabricated porous ecological concrete block.

[0134] Step 3: Fixing and assembling concrete frame beams

[0135] (1) Accurately measure and lay out the anchor hole position on the slope surface. The drilling is required to be cleaned and inspected after dry drilling. The anchor rod body is made of Φ32 threaded steel bars. The anchor rod end should be welded to the frame beam steel bar. Put the anchor rod body into the hole, measure the length of the steel rod exposed outside the hole with a steel ruler, calculate the anchor rod length in the hole (the error is controlled within the range of ±50mm), and ensure the anchoring length.

[0136] (2) Use secondary high-pressure splitting grouting to grout the anchor holes. The grouting pressure is not less than 2.5 MPa. The grouting material is cement mortar with a water-cement ratio of 0.5 and a cement-sand ratio of 1:1.

[0137] (3) The outer frame and inner frame templates of the concrete frame beam are 2m*2m in size and are positioned and marked according to the design and actual site conditions. The inner frame is laid in a diamond-shaped frame at a 45° angle and intersected vertically and horizontally, and assembled according to the reserved positions. The frame is embedded 20cm into the slope and excavated manually. The foundation is first leveled with 5cm cement mortar, and then the steel bars are manufactured and installed. The tail of the anchor rod is welded to the frame steel bar to form a whole.

[0138] (4) Concrete is poured on the installed frame beam using C25 concrete. During pouring, the densely reinforced areas around the anchor holes should be vibrated carefully to ensure quality. The frame is constructed in pieces, and a 2 cm wide expansion joint is left at the contact between two adjacent frames. It is filled with asphalt-soaked wooden boards to form the concrete frame beam. The gravity of the precast concrete frame beam is used to suppress the slope and play a protective role.

[0139] Step 4: Fix the porous eco-concrete blocks.

[0140] (1) The porous eco-concrete prefabricated block is placed in the diamond-shaped frame formed on the inner side of the concrete frame beam and compacted. The diamond-shaped frame is tightly connected to the porous eco-concrete block on all sides, and the surfaces are at the same height.

[0141] (2) Use a mixer to centrally mix the mortar and embed the mortar into the gaps between the porous ecological concrete blocks and the frame. The mortar should maintain appropriate workability and fluidity and be used immediately after mixing. During masonry, the mortar should be full and dense. The mortar should be constructed by sitting mortar and compacting. The joints should be staggered, the slope should be flat, the joints should be tight, and the mortar should be firm and beautiful.

[0142] Comparative Example 1

[0143] Test method: Step 1, preparation of bio-based porous concrete carrier

[0144] (1) 10 kg of cement, 0.7 kg of concrete-specific microsilica powder, 0.02 kg of polycarboxylic acid high-performance water reducer and 2.5 kg of city tap water were mixed and put into a cement slurry mixer and stirred for 30 seconds to obtain a cementitious material;

[0145] (2) mixing high-quality goose egg coarse aggregate with a particle size of 10-20 mm with the cementitious material in (1) and manually stirring for 90 seconds to obtain a coarse aggregate cement slurry;

[0146] (3) taking the cultured yeast saccharomyces cerevisiae liquid and adding hexadecyltrimethylammonium bromide, and foaming with a foaming machine to obtain foam; wherein the concentration of the hexadecyltrimethylammonium bromide in the yeast saccharomyces cerevisiae liquid is 0.5%;

[0147] (4) Add the foam prepared in (3) to the coarse aggregate cement slurry prepared in (2) and mix well. Mold in a 300 mm × 300 mm × 300 mm mold for 24 hours, demould, and cure for 28 days for use.

[0148] Step 2: Prepare Bacillus subtilis and Lactobacillus casei inoculants and fix them on a bio-based porous concrete carrier

[0149] (1) MRS medium is prepared for Bacillus subtilis and Lactobacillus casei;

[0150] (2) The culture medium prepared in (1) is divided into two conical flasks and sterilized in a high-pressure steam sterilizer. The flasks are then taken out and placed on a sterile operating table to cool to room temperature. The flasks are inoculated with Bacillus subtilis mother liquor and Lactobacillus casei mother liquor, respectively, and placed in a constant temperature shaking incubator for shaking culture. The Bacillus subtilis mother liquor is cultured for 15 hours, and the Lactobacillus casei mother liquor is cultured for 18 hours to obtain two microbial agents.

[0151] (3) Bacillus subtilis and Lactobacillus casei were mixed in a ratio of 1:2.2 to prepare a mixed bacterial solution, and the bio-based porous concrete carrier was immersed in the microbial bacterial solution for 90 minutes to fix the deodorizing microorganisms on the bio-based porous concrete carrier, thereby obtaining a prefabricated porous ecological concrete block.

[0152] Step 3: Fixing and assembling concrete frame beams

[0153] (1) Accurately measure and lay out the anchor hole position on the slope surface. The drilling is required to be cleaned and inspected after dry drilling. The anchor rod body is made of Φ32 threaded steel bars. The anchor rod end should be welded to the frame beam steel bar. Put the anchor rod body into the hole, measure the length of the steel rod exposed outside the hole with a steel ruler, calculate the anchor rod length in the hole (the error is controlled within the range of ±50mm), and ensure the anchoring length.

[0154] (2) Use secondary high-pressure splitting grouting to grout the anchor holes. The grouting pressure is not less than 2.5 MPa. The grouting material is cement mortar with a water-cement ratio of 0.5 and a cement-sand ratio of 1:1.

[0155] (3) The outer frame and inner frame templates of the concrete frame beam are 2m*2m in size and are positioned and marked according to the design and actual site conditions. The inner frame is laid in a diamond-shaped frame at a 45° angle and intersected vertically and horizontally, and assembled according to the reserved positions. The frame is embedded 20cm into the slope and excavated manually. The foundation is first leveled with 5cm cement mortar, and then the steel bars are manufactured and installed. The tail of the anchor rod is welded to the frame steel bar to form a whole.

[0156] (4) Concrete is poured on the installed frame beam using C25 concrete. During pouring, the densely reinforced areas around the anchor holes should be vibrated carefully to ensure quality. The frame is constructed in pieces, and a 2 cm wide expansion joint is left at the contact between two adjacent frames. It is filled with asphalt-soaked wooden boards to form the concrete frame beam. The gravity of the precast concrete frame beam is used to suppress the slope and play a protective role.

[0157] Step 4: Fix the porous eco-concrete blocks.

[0158] (1) The porous eco-concrete prefabricated block is placed in the diamond-shaped frame formed on the inner side of the concrete frame beam and compacted. The diamond-shaped frame is tightly connected to the porous eco-concrete block on all sides, and the surfaces are at the same height.

[0159] (2) Use a mixer to centrally mix the mortar and embed the mortar into the gaps between the porous ecological concrete blocks and the frame. The mortar should maintain appropriate workability and fluidity and be used immediately after mixing. During masonry, the mortar should be full and dense. The mortar should be constructed by sitting mortar and compacting. The joints should be staggered, the slope should be flat, the joints should be tight, and the mortar should be firm and beautiful.

[0160] Test Case

[0161] The porous ecological concrete blocks prepared in Examples 1-4 and Comparative Example 1 were placed in a water tank with a volume of 1m×0.6m×0.6m, and the same volume of hydrogen sulfide with a concentration of 60mg / m 3 、Ammonia concentration is 150mg / m 3 The concentrations of hydrogen sulfide and ammonia in the water were detected by methylene blue colorimetry and sodium reagent colorimetry respectively, and the detection was performed every 3 days for 30 days. The removal rates of hydrogen sulfide in Examples 1-4 and Comparative Example 1 were 64.3%, 59.7%, 58.8%, 53.5% and 50.7%, respectively, and the removal rates of ammonia were 72.0%, 68.2%, 66.7%, 67.3% and 62.8%, respectively.

[0162] It can be seen that the porous ecological concrete blocks prepared in Examples 1 to 4 have high porosity and good stability, and have good hydrogen sulfide and ammonia removal capabilities. Therefore, the present application sets the concentration of hexadecyltrimethylammonium bromide in the brewer's yeast liquid to be 0.2% to 0.8%; the mixed bacterial liquid includes a Bacillus subtilis agent and a Lactobacillus casei agent in a mixing ratio of (1:0.3)-(1:2); it has a good river bank slope protection effect, and by replacing the prefabricated porous ecological concrete blocks in the later stage, a continuous deodorization effect can be achieved.

[0163] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0164] While the disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0165] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function, characterized in that: include: A prefabricated porous ecological concrete block is provided; the prefabricated porous ecological concrete block comprises a bio-based porous concrete carrier and a mixed bacterial solution loaded on the bio-based porous concrete carrier; wherein the bio-based porous concrete carrier comprises a cement paste with coarse aggregate and a saccharomyces cerevisiae bacterial solution doped with hexadecyltrimethylammonium bromide; the particle size of the coarse aggregate is 10 mm to 20 mm; the concentration of the hexadecyltrimethylammonium bromide in the saccharomyces cerevisiae bacterial solution is 0.2% to 0.8%; the mixed bacterial solution comprises a Bacillus subtilis bacterial agent and a Lactobacillus casei bacterial agent in a mixing ratio of (1:0.3) to (1:2); Prefabricated concrete frame beams are fixed on the river bank slope by anchor rods, cement mortar, steel bars and concrete; The prefabricated porous ecological concrete blocks are placed in the frames in the concrete frame beams, and the porous ecological concrete is fixed in the concrete frame beams by cement mortar.

2. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 1, characterized in that: The method further comprises preparing the prefabricated porous eco-concrete block by: preparing the bio-based porous concrete carrier; preparing the mixed bacterial solution; The bio-based porous concrete carrier is immersed in the mixed bacterial solution.

3. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 2, characterized in that: The preparation of the bio-based porous concrete carrier comprises: Mix cement, microsilica powder for concrete, a water reducing agent and water, and stir to obtain a gel material; mix the coarse aggregate with the gel material and stir to obtain the cement slurry with the coarse aggregate; Putting the saccharomyces cerevisiae liquid doped with hexadecyltrimethylammonium bromide into a foaming machine for foaming; the saccharomyces cerevisiae liquid is the saccharomyces cerevisiae liquid that has been fermented; The foamed product is added into the cement slurry with coarse aggregate, stirred and then formed in a mold.

4. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 2, characterized in that: The preparation of the mixed bacterial solution comprises: Bacillus subtilis is cultured in MRS medium for 10 to 25 hours to obtain a Bacillus subtilis inoculum; Lactobacillus casei is cultured in MRS medium for 15 to 30 hours to obtain a Lactobacillus casei inoculum; The Bacillus subtilis inoculant and the Lactobacillus casei inoculant are mixed in a mixing ratio of (1:0.3)-(1:2) to prepare a mixed bacterial solution.

5. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 3, characterized in that: The mass ratio of water to cement is 0.2-0.4; the microsilica powder specially used for concrete accounts for 5%-10% of the mass of cement; the water reducing agent accounts for 0.1%-0.3% of the mass of cement; and the coarse aggregate is pebbles.

6. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 2, characterized in that: The duration of the immersion treatment is 20 to 90 minutes.

7. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 1, characterized in that: In a direction away from the ground, the prefabricated porous ecological concrete block is flush with the surface of the concrete lattice beam.

8. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 1, characterized in that: The connection between the prefabricated porous ecological concrete block and the concrete lattice beam is filled with mortar.

9. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 1, characterized in that: The concrete lattice beam is embedded in the slope surface of the river bank slope by 19-21 cm.

10. The method for protecting riverbank slopes with porous ecological concrete having in-situ deodorization function according to claim 1, characterized in that: The water-cement ratio of the cement mortar is 0.45-0.55; the cement-sand ratio is (0.9:1) to (1.1:1).

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