CN111116148A - Preparation method of high-strength plant-growing concrete - Google Patents
Preparation method of high-strength plant-growing concrete Download PDFInfo
- Publication number
- CN111116148A CN111116148A CN202010083069.0A CN202010083069A CN111116148A CN 111116148 A CN111116148 A CN 111116148A CN 202010083069 A CN202010083069 A CN 202010083069A CN 111116148 A CN111116148 A CN 111116148A
- Authority
- CN
- China
- Prior art keywords
- parts
- calcium carbonate
- heavy calcium
- concrete
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a preparation method of high-strength plant-growing concrete, belonging to the technical field of building materials. The high-strength plant concrete is prepared by adding the modified polypropylene fiber and the basalt fiber, the polypropylene fiber can disperse the shrinkage energy of the concrete, prevent the expansion of original microcracks in the concrete and delay the appearance of new cracks, so that the continuity inside the concrete material is enhanced, and the brittleness and the strength of the plant concrete are improved to a great extent, therefore, the reasonable doping of the polypropylene fiber obviously improves the performance of the concrete, and the short-cut basalt fiber is doped into the plant concrete, so that the brittleness of the plant concrete can be effectively reduced, the bearing capacity of the plant concrete is improved, and the crack resistance and the impact resistance of the plant concrete are improved.
Description
Technical Field
The invention relates to a preparation method of high-strength plant-growing concrete, belonging to the technical field of building materials.
Background
The most serious part of water and soil loss is the road slope, tunnel portal hillside, river channel slope and other parts. However, the slope part is difficult to protect, and the traditional protection measures mainly comprise a vegetation slope protection technology, a concrete pouring technology and a grid method slope protection technology. Vegetation slope protection technology is that simple plants green plants on abrupt slopes such as road side slope, utilizes plant roots to carry out solid soil bank protection, but the relatively poor and plant roots of plant roots side slope position stability is shallow, and when meetting continuous overcast and rainy weather, the side slope just easily leads to natural disasters' such as landslide, mud-rock flow after being soaked by the rainwater. Concrete pouring technology is developed to improve the stability of the side slope. The concrete pouring technology is that a layer of cement concrete is directly poured on the slope surfaces such as a road slope and the like so as to achieve the purposes of fixing the slope and preventing water and soil loss. However, cast concrete has many drawbacks: the pouring of concrete isolates the exchange of substances and energy between the slope and the outside, and the original natural ecological environment of the slope is seriously damaged. The concrete grid slope protection is an improvement technology for solving the problem of natural environment damage caused by concrete pouring slope protection, and the slope protection technology has a certain greening effect, but the greening effect can only reach 8-20% due to the fact that the soil in the frame is poor in anti-excavation capacity. In view of the limitations of the traditional slope protection mode, the plant-growing concrete is developed and applied. The vegetation concrete bank protection is that porous concrete is pour on domatic, then utilizes porous structure to carry out the growth of plant, and the plant roots runs through concrete intercommunication hole and reaches domatic soil to the effect of realizing stabilizing domatic and afforestation domatic. However, the plant-growing concrete is a porous large-particle-size aggregate structure formed by binding points in a mode that a cementing material wraps an aggregate. The contact area between concrete aggregates is small, the internal stress is uneven under the action of an external load, the deformation and the damage are easy to occur, and the problems such as high alkalinity and low strength of concrete, difficulty in plant topdressing and the like are also faced in the process of popularization of plant growing concrete.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems that the common plant-growing concrete has low strength and is easy to deform and damage due to nonuniform internal stress, the preparation method of the high-strength plant-growing concrete is provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
(1) placing the broken stone, the silica fume and the straw powder into a stirrer, and stirring at the normal temperature at the rotating speed of 200-250 r/min for 30-40 min to obtain a mixture A for later use;
(2) adding the modified portland cement, the modified polypropylene short fibers, the basalt fibers, the mixture A, boric acid and the polycarboxylic acid high-efficiency water reducing agent into tap water, placing the mixture in a stirrer, stirring the mixture for 2-4 min at the normal temperature at the rotating speed of 260-300 r/min, and standing the mixture for 20-24 h at the normal temperature to obtain the high-strength plant-growing concrete.
The modified portland cement, the broken stone, the modified polypropylene short fiber, the basalt fiber, the silica fume, the straw powder, the boric acid, the polycarboxylic acid high-efficiency water reducing agent and the tap water are respectively prepared from the following components in parts by weight: 180-210 parts of portland cement, 1200-1400 parts of broken stone, 24-28 parts of modified polypropylene short fiber, 12-14 parts of basalt fiber, 12-14 parts of silica fume, 6-7 parts of straw powder, 3.6-4.2 parts of boric acid, 1.8-2.1 parts of polycarboxylic acid high-efficiency water reducing agent and 60-70 parts of tap water.
The modified polypropylene short fiber prepared in the step (2) comprises the following specific preparation steps:
(1) placing the polypropylene fiber, the activated heavy calcium carbonate powder and the polyethylene glycol into a stirrer, and stirring at the normal temperature at the rotating speed of 800-1000 r/min for 40-60 min to obtain a mixture B;
(2) adding the mixture B into a double-screw extruder, and extruding and granulating at the rotating speed of 120-160 r/min at the temperature of 180-200 ℃ to obtain blended granules;
(3) and (3) placing the blended granules into a melt spinning machine, spinning at a winding speed of 10-15 m/min, cooling at normal temperature, and shearing to obtain the modified polypropylene short fiber.
The weight parts of the polypropylene fiber, the activated heavy calcium carbonate powder and the polyethylene glycol are 60-80 parts of the polypropylene fiber, 15-20 parts of the activated heavy calcium carbonate powder and 6-8 parts of the polyethylene glycol.
The feeding speed of the mixture in the step (2) is 5 g/min.
The spinning conditions in the step (3) are that the temperature of the filler part is 180 ℃, the temperature of a spinning nozzle is 185 ℃, and the average length of the modified polypropylene short fibers is 2-4 cm.
The specific preparation steps of the activated heavy calcium carbonate powder in the step (1) are as follows:
(1) placing heavy calcium carbonate into a grinder, and grinding at the normal temperature at the rotating speed of 160-180 r/min for 1-2 h to obtain heavy calcium carbonate powder;
(2) adding heavy calcium carbonate powder into tap water, and stirring at the rotating speed of 200-240 r/min for 20-30 min at normal temperature to obtain a heavy calcium carbonate suspension;
(3) slowly adding stearic acid into the heavy calcium carbonate suspension, placing the suspension in a water bath at the temperature of 70-80 ℃, and stirring the suspension for 2-4 hours at the rotating speed of 250-300 r/min to obtain a heavy calcium carbonate mixed solution;
(4) and placing the heavy calcium carbonate mixed solution in a vacuum pump, carrying out suction filtration for 30-40 min at normal temperature, taking a filter cake, placing the filter cake in an oven at 100-110 ℃ for drying for 1-2 h, cooling at normal temperature, and grinding to obtain activated heavy calcium carbonate powder.
The heavy calcium carbonate, the stearic acid and the tap water are 40-50 parts by weight of heavy calcium carbonate, 4-5 parts by weight of stearic acid and 240-300 parts by weight of tap water.
The average particle size of the heavy calcium carbonate powder in the step (1) is 0.2-0.4 mm.
The stearic acid in the step (3) is added for 10-15 min.
Compared with other methods, the method has the beneficial technical effects that:
(1) the invention prepares the high-strength vegetation concrete by adding the modified polypropylene fiber and the basalt fiber, the polypropylene fiber has the advantages of higher melting point, light weight, low price and the like, the polypropylene fiber can be organically combined with the concrete, the polypropylene fiber with high tensile strength and low elastic modulus is reasonably doped in the concrete, the polypropylene fiber can disperse the shrinkage energy of the concrete, prevent the expansion of original microcracks in the concrete and delay the appearance of new cracks, thus the continuity in the concrete material is enhanced, the brittleness and the strength of the vegetation concrete are improved to a great extent, the performance of the concrete is obviously improved by reasonably doping the polypropylene fiber, the basalt fiber has good temperature resistance, excellent chemical stability, good acid resistance, alkali resistance and corrosion resistance, high tensile strength and large elastic modulus, the short basalt fibers are doped into the plant concrete, so that the brittleness of the plant concrete can be effectively reduced, the bearing capacity of the plant concrete is improved, the anti-cracking performance and the impact resistance of the plant concrete are improved, meanwhile, because the basalt fibers are thin, the specific surface area is large, and the number of the fibers in a unit volume is large, a uniform three-dimensional disorientation grid system is easily formed in the plant concrete, the uniform disorientation grid system is also beneficial to improving the absorption of kinetic energy when the concrete is impacted, and the impact mechanical property of the uniformly distributed basalt fibers on the concrete has a certain improvement effect;
(2) the high-strength plant concrete is prepared by adding the silica fume, the silica fume belongs to an inert substance, does not react with water in the cement hydration process, but can react with a cement hydration product to generate a product with gelling property and fill harmful pores in the plant concrete, so the silica fume can improve the internal structure of the plant concrete, improve the strength and durability of the concrete to a certain extent, reduce the consumption of the cement, reduce the production cost and save the environmental resources.
The specific implementation method comprises the steps of weighing 40-50 parts by weight of heavy calcium carbonate, 4-5 parts by weight of stearic acid and 240-300 parts by weight of tap water, respectively, placing the heavy calcium carbonate in a grinder, grinding the heavy calcium carbonate for 1-2 hours at a rotating speed of 160-180 r/min at normal temperature to obtain heavy calcium carbonate powder with an average particle size of 0.2-0.4 mm, adding the heavy calcium carbonate powder into tap water, stirring the mixture for 20-30 minutes at a rotating speed of 200-240 r/min at normal temperature to obtain heavy calcium carbonate suspension, slowly adding the stearic acid into the heavy calcium carbonate suspension, adding the stearic acid for 10-15 minutes, placing the mixture in a water bath condition of 70-80 ℃, stirring the mixture for 2-4 hours at a rotating speed of 250-300 r/min to obtain heavy calcium carbonate mixed solution, placing the heavy calcium carbonate mixed solution in a vacuum pump, carrying out suction filtration for 30-40 minutes at normal temperature, taking filter cakes, placing the filter cakes in an, grinding to obtain activated heavy calcium carbonate powder;
respectively weighing 60-80 parts by weight of polypropylene fiber, 15-20 parts by weight of activated heavy calcium carbonate powder and 6-8 parts by weight of polyethylene glycol, placing the polypropylene fiber, the activated heavy calcium carbonate powder and the polyethylene glycol in a high-speed stirrer, stirring at the normal temperature at the rotating speed of 800-1000 r/min for 40-60 min to obtain a mixture, adding the mixture into a double-screw extruder at the feeding speed of 5g/min, extruding and granulating at the rotating speed of 120-160 r/min at the temperature of 180-200 ℃ to obtain blended granules, placing the blended granules in a melt spinning machine, spinning at the winding speed of 10-15 m/min at the temperature of a filler part of 180 ℃ and the temperature of a spinning nozzle of 185 ℃, cooling at the normal temperature, and shearing to obtain modified polypropylene short fibers with the average length of 2-4 cm;
and respectively weighing 180-210 parts of portland cement, 1200-1400 parts of broken stone, 24-28 parts of modified polypropylene short fiber, 12-14 parts of basalt fiber, 12-14 parts of silica fume, 6-7 parts of straw powder, 3.6-4.2 parts of boric acid, 1.8-2.1 parts of polycarboxylic acid high-efficiency water reducer and 60-70 parts of tap water according to parts by weight, placing the broken stone, the silica fume and the straw powder in a stirrer, stirring at the normal temperature at the rotating speed of 200-250 r/min for 30-40 min to obtain a mixture, adding the portland cement, the modified polypropylene short fiber, the basalt fiber, the mixture, the boric acid and the polycarboxylic acid high-efficiency water reducer into the tap water, placing the mixture in the stirrer, stirring at the normal temperature at the rotating speed of 260-300 r/min for 2-4 min, and standing at the normal temperature for 20-24 h to obtain the high-strength plant-growing.
Example 1
Weighing 40 parts of heavy calcium carbonate, 4 parts of stearic acid and 240 parts of tap water respectively, placing the heavy calcium carbonate into a grinder, grinding for 1h at the normal temperature at the rotating speed of 160r/min to obtain heavy calcium carbonate powder with the average particle size of 0.2mm, adding the heavy calcium carbonate powder into the tap water, stirring for 20min at the normal temperature at the rotating speed of 200r/min to obtain heavy calcium carbonate suspension, slowly adding the stearic acid into the heavy calcium carbonate suspension, adding the stearic acid for 10min, placing the mixture into a water bath condition of 70 ℃, stirring for 2h at the rotating speed of 250r/min to obtain heavy calcium carbonate mixed solution, placing the heavy calcium carbonate mixed solution into a vacuum pump, performing suction filtration for 30min at the normal temperature, taking a filter cake, placing the filter cake into an oven at 100 ℃ for drying for 1h, cooling at the normal temperature, and grinding to obtain activated heavy;
respectively weighing 60 parts of polypropylene fiber, 15 parts of activated heavy calcium carbonate powder and 6 parts of polyethylene glycol according to parts by weight, placing the polypropylene fiber, the activated heavy calcium carbonate powder and the polyethylene glycol in a high-speed stirrer, stirring at the normal temperature at the rotating speed of 800r/min for 40min to obtain a mixture, adding the mixture into a double-screw extruder at the feeding speed of 5g/min, extruding and granulating at the rotating speed of 120r/min at the temperature of 180 ℃ to obtain blended granules, placing the blended granules in a melt spinning machine, spinning at the filling part temperature of 180 ℃ and the spinning nozzle temperature of 185 ℃ at the winding speed of 10m/min, cooling at the normal temperature, and shearing to obtain modified polypropylene short fibers with the average length of 2 cm;
and respectively weighing 180 parts by weight of portland cement, 1200 parts by weight of broken stone, 24 parts by weight of modified polypropylene short fiber, 12 parts by weight of basalt fiber, 12 parts by weight of silica fume, 6 parts by weight of straw powder, 3.6 parts by weight of boric acid, 1.8 parts by weight of polycarboxylic acid high-efficiency water reducing agent and 60 parts by weight of tap water, placing the broken stone, the silica fume and the straw powder in a stirrer, stirring at the normal temperature at the rotating speed of 200r/min for 30min to obtain a mixture, adding the portland cement, the modified polypropylene short fiber, the basalt fiber, the mixture, the boric acid and the polycarboxylic acid high-efficiency water reducing agent into the tap water, placing the mixture in a stirrer, stirring at the normal temperature at the rotating speed of 260r/min for 2min, and standing at.
Example 2
Respectively weighing 45 parts of heavy calcium carbonate, 4.5 parts of stearic acid and 270 parts of tap water according to parts by weight, placing the heavy calcium carbonate in a grinder, grinding at the normal temperature at the rotating speed of 170r/min for 1.5h to obtain heavy calcium carbonate powder with the average particle size of 0.3mm, adding the heavy calcium carbonate powder into the tap water, stirring at the normal temperature at the rotating speed of 220r/min for 25min to obtain heavy calcium carbonate suspension, slowly adding the stearic acid into the heavy calcium carbonate suspension for 12.5min, placing in a water bath condition at the temperature of 75 ℃, stirring at the rotating speed of 275r/min for 3h to obtain heavy calcium carbonate mixed solution, placing the heavy calcium carbonate mixed solution in a vacuum pump, carrying out suction filtration at the normal temperature for 35min, taking a filter cake, placing in an oven at the temperature of 105 ℃ for drying for 1.5h, cooling at the normal temperature, and grinding to obtain;
respectively weighing 70 parts of polypropylene fiber, 17.5 parts of activated heavy calcium carbonate powder and 7 parts of polyethylene glycol according to parts by weight, placing the polypropylene fiber, the activated heavy calcium carbonate powder and the polyethylene glycol in a high-speed stirrer, stirring at the normal temperature at the rotating speed of 900r/min for 50min to obtain a mixture, adding the mixture into a double-screw extruder at the feeding speed of 5g/min, extruding and granulating at the rotating speed of 140r/min at the temperature of 190 ℃ to obtain blended granules, placing the blended granules in a melt spinning machine, spinning at the winding speed of 12.5m/min at the conditions of the filler part temperature of 180 ℃ and the spinning nozzle temperature of 185 ℃, cooling at normal temperature, and shearing to obtain modified polypropylene short fibers with the average length of 3 cm;
and respectively weighing 195 parts of portland cement, 1300 parts of crushed stone, 26 parts of modified polypropylene short fiber, 13 parts of basalt fiber, 13 parts of silica fume, 6.5 parts of straw powder, 3.9 parts of boric acid, 1.9 parts of polycarboxylic acid high-efficiency water reducing agent and 65 parts of tap water according to parts by weight, placing the crushed stone, the silica fume and the straw powder in a stirrer, stirring at the normal temperature at the rotating speed of 225r/min for 35min to obtain a mixture, adding the portland cement, the modified polypropylene short fiber, the basalt fiber, the mixture, the boric acid and the polycarboxylic acid high-efficiency water reducing agent into the tap water, placing in a stirrer, stirring at the normal temperature at the rotating speed of 280r/min for 3min, and standing at the normal temperature for 22h to obtain the high-strength plant concrete.
Example 3
Respectively weighing 50 parts by weight of heavy calcium carbonate, 5 parts by weight of stearic acid and 300 parts by weight of tap water, placing the heavy calcium carbonate in a grinder, grinding for 2 hours at the normal temperature at the rotating speed of 180r/min to obtain heavy calcium carbonate powder with the average particle size of 0.4mm, adding the heavy calcium carbonate powder into the tap water, stirring for 30 minutes at the normal temperature at the rotating speed of 240r/min to obtain heavy calcium carbonate suspension, slowly adding the stearic acid into the heavy calcium carbonate suspension for 15 minutes, placing in a water bath condition of 70-80 ℃, stirring for 4 hours at the rotating speed of 300r/min to obtain heavy calcium carbonate mixed solution, placing the heavy calcium carbonate mixed solution in a vacuum pump, performing suction filtration for 40 minutes at the normal temperature, taking a filter cake, placing in an oven at 110 ℃ for drying for 2 hours, cooling at the normal temperature, and grinding to obtain activated heavy calcium carbonate powder;
respectively weighing 80 parts of polypropylene fiber, 20 parts of activated heavy calcium carbonate powder and 8 parts of polyethylene glycol according to parts by weight, placing the polypropylene fiber, the activated heavy calcium carbonate powder and the polyethylene glycol in a high-speed stirrer, stirring at the normal temperature at the rotating speed of 1000r/min for 60min to obtain a mixture, adding the mixture into a double-screw extruder at the feeding speed of 5g/min, extruding and granulating at the rotating speed of 160r/min at the temperature of 200 ℃ to obtain blended granules, placing the blended granules in a melt spinning machine, spinning at the filling part temperature of 180 ℃ and the spinning nozzle temperature of 185 ℃ at the winding speed of 15m/min, cooling at the normal temperature, and shearing to obtain modified polypropylene short fibers with the average length of 4 cm;
and respectively weighing 210 parts of portland cement, 1400 parts of crushed stone, 28 parts of modified polypropylene short fiber, 14 parts of basalt fiber, 14 parts of silica fume, 7 parts of straw powder, 4.2 parts of boric acid, 2.1 parts of polycarboxylic acid high-efficiency water reducing agent and 70 parts of tap water according to parts by weight, placing the crushed stone, the silica fume and the straw powder in a stirrer, stirring at the normal temperature at the rotating speed of 250r/min for 40min to obtain a mixture, adding the portland cement, the modified polypropylene short fiber, the basalt fiber, the mixture, the boric acid and the polycarboxylic acid high-efficiency water reducing agent into the tap water, placing in a stirrer, stirring at the normal temperature at the rotating speed of 300r/min for 4min, and standing at the normal temperature for 24h to obtain the high-strength plant-growing.
Comparative example: plant growing concrete produced by Zhejiang company.
The plant-growing concrete prepared in the examples and the comparative examples is detected, and the concrete detection is as follows:
compressive strength: the method comprises the steps of manufacturing a green concrete test block with the size of 150mm multiplied by 150mm in a laboratory, placing the test block into a standard curing room after molding and demolding, curing for 28 days, and measuring the compressive strength according to the standard GB/T50081-2002 of the test method for the mechanical properties of common concrete, wherein the model of a test instrument is YES-2000 digital display compression tester.
Breaking strength: a concrete test piece with the size of 150mm multiplied by 550mm is manufactured in a laboratory, is taken out after being maintained in a standard curing room for 28 days, and is subjected to flexural strength test research according to the standard GB/T50081-2002 of the test method for the mechanical property of common concrete. The instrument adopted in the test is a YES-300 digital display pressure tester.
Porosity: placing the ecological concrete test piece in an oven to bake for 24h, and measuring the mass m of the test piece by using an electronic balance2Placing the test piece in water, and weighing the mass m of the test piece in the water by using a soaking balance1And calculating to obtain the porosity.
Water permeability coefficient: keeping the water pressure unchanged, uniformly and stably penetrating through the test piece, measuring the water quantity penetrating through the test piece in the time period, and calculating to obtain the water penetration coefficient.
The specific test results are shown in table 1.
Table 1 comparative table of property characterization
| Detecting items | Example 1 | Example 2 | Example 3 | Comparative example |
| Compressive strength/MPa | 5.28 | 5.12 | 5.34 | 1.68 |
| Flexural strength/MPa | 1.48 | 1.46 | 1.52 | 0.46 |
| Porosity/% | 32.02 | 32.10 | 31.86 | 18.64 |
| Coefficient of water permeability/cm/s | 2.62 | 2.86 | 2.82 | 1.84 |
As can be seen from Table 1, the green concrete prepared by the invention has good compressive and flexural strength, good porosity and water permeability.
Claims (10)
1. A preparation method of high-strength plant-growing concrete is characterized by comprising the following specific preparation steps:
(1) placing the broken stone, the silica fume and the straw powder into a stirrer, and stirring at the normal temperature at the rotating speed of 200-250 r/min for 30-40 min to obtain a mixture;
(2) adding portland cement, modified polypropylene short fibers, basalt fibers, a mixture, boric acid and a polycarboxylic acid high-efficiency water reducing agent into tap water, placing the mixture into a stirrer, stirring the mixture for 2-4 min at the normal temperature at the rotating speed of 260-300 r/min, and standing the mixture for 20-24 h at the normal temperature to obtain the high-strength plant-growing concrete.
2. The preparation method of high-strength plant-growing concrete according to claim 1, wherein the silicate cement, crushed stone, modified polypropylene short fiber, basalt fiber, silica fume, straw powder, boric acid, polycarboxylic acid high-efficiency water reducing agent and tap water are 180-210 parts by weight of silicate cement, 1200-1400 parts by weight of crushed stone, 24-28 parts by weight of modified polypropylene short fiber, 12-14 parts by weight of basalt fiber, 12-14 parts by weight of silica fume, 6-7 parts by weight of straw powder, 3.6-4.2 parts by weight of boric acid, 1.8-2.1 parts by weight of polycarboxylic acid high-efficiency water reducing agent and 60-70 parts by weight of tap water.
3. The method for preparing high-strength green-growing concrete according to claim 1, wherein the modified polypropylene short fiber prepared in the step (2) is prepared by the following steps:
(1) placing the polypropylene fiber, the activated heavy calcium carbonate powder and the polyethylene glycol in a high-speed stirrer, and stirring at the rotating speed of 800-1000 r/min for 40-60 min at normal temperature to obtain a mixture;
(2) adding the mixture into a double-screw extruder, and extruding and granulating at the rotating speed of 120-160 r/min at the temperature of 180-200 ℃ to obtain blended granules;
(3) and (3) placing the blended granules into a melt spinning machine, spinning at a winding speed of 10-15 m/min, cooling at normal temperature, and shearing to obtain the modified polypropylene short fiber.
4. The method for preparing high-strength plant-growing concrete according to claim 3, wherein the weight parts of the polypropylene fiber, the activated heavy calcium carbonate powder and the polyethylene glycol are 60-80 parts of the polypropylene fiber, 15-20 parts of the activated heavy calcium carbonate powder and 6-8 parts of the polyethylene glycol.
5. The method for preparing high-strength green-growing concrete according to claim 3, wherein the feeding rate of the mixture in the step (2) is 5 g/min.
6. The method for preparing high-strength green-growing concrete according to claim 3, wherein the spinning conditions in the step (3) are that the temperature of the filler part is 180 ℃, the temperature of a spinneret is 185 ℃, and the average length of the modified polypropylene short fibers is 2-4 cm.
7. The method for preparing high-strength green-growing concrete according to claim 3, wherein the activated heavy calcium carbonate powder in the step (1) is prepared by the following steps:
(1) placing heavy calcium carbonate into a grinder, and grinding at the normal temperature at the rotating speed of 160-180 r/min for 1-2 h to obtain heavy calcium carbonate powder;
(2) adding heavy calcium carbonate powder into tap water, and stirring at the rotating speed of 200-240 r/min for 20-30 min at normal temperature to obtain a heavy calcium carbonate suspension;
(3) slowly adding stearic acid into the heavy calcium carbonate suspension, placing the suspension in a water bath at the temperature of 70-80 ℃, and stirring the suspension for 2-4 hours at the rotating speed of 250-300 r/min to obtain a heavy calcium carbonate mixed solution;
(4) and placing the heavy calcium carbonate mixed solution in a vacuum pump, carrying out suction filtration for 30-40 min at normal temperature, taking a filter cake, placing the filter cake in an oven at 100-110 ℃ for drying for 1-2 h, cooling at normal temperature, and grinding to obtain activated heavy calcium carbonate powder.
8. The method for preparing high-strength green-planting concrete according to claim 7, wherein the weight parts of the heavy calcium carbonate, the stearic acid and the tap water are 40-50 parts of the heavy calcium carbonate, 4-5 parts of the stearic acid and 240-300 parts of the tap water.
9. The method for preparing high-strength green-growing concrete according to claim 7, wherein the average particle size of the heavy calcium carbonate powder in the step (1) is 0.2-0.4 mm.
10. The method for preparing high-strength green-growing concrete according to claim 7, wherein the stearic acid in the step (3) is added for 10-15 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010083069.0A CN111116148A (en) | 2020-02-07 | 2020-02-07 | Preparation method of high-strength plant-growing concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010083069.0A CN111116148A (en) | 2020-02-07 | 2020-02-07 | Preparation method of high-strength plant-growing concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111116148A true CN111116148A (en) | 2020-05-08 |
Family
ID=70491201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010083069.0A Withdrawn CN111116148A (en) | 2020-02-07 | 2020-02-07 | Preparation method of high-strength plant-growing concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111116148A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502712A (en) * | 2020-11-25 | 2021-03-16 | 西南科技大学 | Preparation method of calhuaji bare rock rivet root transition layer |
-
2020
- 2020-02-07 CN CN202010083069.0A patent/CN111116148A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502712A (en) * | 2020-11-25 | 2021-03-16 | 西南科技大学 | Preparation method of calhuaji bare rock rivet root transition layer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103214214B (en) | Preparation raw materials and preparation method of inorganic man-made rock | |
| WO2021189886A1 (en) | Unfired construction material using original state shielding soil and preparation method therefor | |
| CN109095859B (en) | Self-healing anti-cracking waterproof root-resistant concrete | |
| CN105272001B (en) | A kind of haydite concrete and preparation method thereof | |
| CN112679190B (en) | Reinforcing waterproof mortar for filling concrete bottom cavity | |
| CN114605125B (en) | Method for preparing water permeable brick by using construction waste | |
| CN112010613A (en) | Preparation method of modified corn straw fiber reinforced recycled concrete | |
| CN107586084A (en) | A kind of modified alkali-resistant glass fibre enhancing concrete and preparation method thereof | |
| CN111892346A (en) | Environment-friendly modified straw fiber regenerated fine aggregate cement-based composite material and preparation method thereof | |
| CN106892620A (en) | A kind of water-permeable brick and its production technology | |
| CN111116148A (en) | Preparation method of high-strength plant-growing concrete | |
| CN113004005A (en) | Cement-based grouting material prepared based on machine-made sand | |
| CN107572997A (en) | A kind of permanent seal cooling blast furnace granulated slag building block | |
| CN111233430A (en) | Method for modifying raw soil by using cementing material | |
| CN114368931A (en) | High-molecular dense anti-cracking material and preparation method thereof | |
| CN113620633A (en) | Treatment process method of anti-crack cement mortar reinforced chopped glass fibers | |
| CN116655327B (en) | High-strength waterproof concrete and preparation method thereof | |
| CN111423182B (en) | Method for preparing garden rockery by utilizing construction waste regeneration | |
| CN113860834B (en) | Liquid regulator for super-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and reinforced autoclaved aerated concrete, and preparation method and application thereof | |
| CN106810205B (en) | High-strength water permeable brick and preparation method thereof | |
| CN114714691A (en) | Novel ceramic integrated plate and processing technology thereof | |
| CN101386502B (en) | Method for preparing porous desert greening brick | |
| CN1057449A (en) | Dense water glass acid-proof concrete and preparation method | |
| CN111646730A (en) | Glass fiber polyester resin concrete for prefabricated pump station cylinder and preparation method thereof | |
| CN112267451A (en) | Coconut fiber epoxy resin composite fabric reinforced foundation manufacturing method and foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200508 |