CN111217585B - Method for rapidly leveling concrete core sample by using sulfur cement - Google Patents
Method for rapidly leveling concrete core sample by using sulfur cement Download PDFInfo
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- CN111217585B CN111217585B CN202010045575.0A CN202010045575A CN111217585B CN 111217585 B CN111217585 B CN 111217585B CN 202010045575 A CN202010045575 A CN 202010045575A CN 111217585 B CN111217585 B CN 111217585B
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 157
- 239000011593 sulfur Substances 0.000 title claims abstract description 150
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 150
- 239000004568 cement Substances 0.000 title claims abstract description 126
- 239000004567 concrete Substances 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- 238000011049 filling Methods 0.000 claims abstract description 28
- 238000000227 grinding Methods 0.000 claims abstract description 22
- 230000007797 corrosion Effects 0.000 claims abstract description 17
- 238000005260 corrosion Methods 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 17
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 17
- 239000011707 mineral Substances 0.000 claims abstract description 17
- 239000006247 magnetic powder Substances 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 66
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 46
- 239000003795 chemical substances by application Substances 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 36
- 239000000843 powder Substances 0.000 claims description 36
- 229910052742 iron Inorganic materials 0.000 claims description 23
- 238000012360 testing method Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 20
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 18
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 18
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 18
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 16
- 239000004927 clay Substances 0.000 claims description 15
- 239000012745 toughening agent Substances 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000002817 coal dust Substances 0.000 claims description 8
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 8
- 238000007790 scraping Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 229940080314 sodium bentonite Drugs 0.000 claims description 8
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 210000003298 dental enamel Anatomy 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 238000007730 finishing process Methods 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229940099259 vaseline Drugs 0.000 claims description 4
- 239000005864 Sulphur Substances 0.000 claims description 3
- 101100442582 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) spe-1 gene Proteins 0.000 claims 2
- 101100150045 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) spe-3 gene Proteins 0.000 claims 1
- 238000009472 formulation Methods 0.000 claims 1
- 238000009966 trimming Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 15
- 238000012545 processing Methods 0.000 description 11
- 230000008901 benefit Effects 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- C04B28/36—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 sulfur, sulfides or selenium
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
- C04B2111/00991—Uses not provided for elsewhere in C04B2111/00 for testing
-
- 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
- G01N2001/386—Other diluting or mixing processes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a method for rapidly leveling a concrete core sample by using sulfur cement, which comprises the following components in parts by weight: 61-65 parts of sulfur, 37-39 parts of corrosion-resistant filler, 6-9 parts of magnetic powder, 6-8 parts of flexibilizer, 4-4.5 parts of hyperdispersant and 2.5-3.5 parts of mineral admixture; the invention aims to provide a method for quickly filling up a concrete core sample by using sulfur cement, which solves the problems that in the prior art, the traditional double-sided grinding machine is required to grind up, and the technology of heating and heavy melting of the sulfur cement and filling up the concrete core sample are not effectively solved, so that the concrete core sample is basically treated by adopting the double-sided grinding machine or cement paste at present in China; the traditional concrete core sample leveling treatment has complex operation, long time, high cost, large error (mainly derived from technical capability and operation level of operators of the double-sided grinding machine) and high safety risk; the rapid concrete core sample filling technology by using the sulfur cement is one of effective ways for solving the problems, and has the characteristics of simple tool equipment, rapid and convenient operation, low cost, stable and reliable data result, wide application range, low safety risk and the like.
Description
Technical Field
The invention relates to the technical field of building material detection, in particular to a method for rapidly filling a concrete core sample with sulfur cement.
Background
In engineering quality monitoring, a concrete core sample is a sample drilled as required from a concrete member to detect concrete strength; the method for detecting the compressive strength of the concrete comprises a concrete cube test block detection method, an ultrasonic detection method, a rebound detection method, a core drilling detection method and the like, wherein the core drilling detection method is to drill a concrete core sample from structural concrete by using a special drilling machine to detect the strength of the concrete or observe the internal quality of the concrete, and the method has the characteristics of accuracy and intuitiveness compared with other methods and is a method commonly used in concrete quality identification and accident analysis.
However, the concrete core sample is affected by various factors in the sampling process, and the flatness and verticality of the end face of the obtained concrete core sample cannot completely meet the detection requirement, and mechanical leveling or leveling treatment is required. In the prior art, the operation of directly carrying out mechanical grinding on the end face has high requirements on the processing precision of grinding equipment, the technical capacity and the proficiency of test personnel, and the unstable test result is easy to cause.
Disclosure of Invention
The invention aims to provide a method for rapidly leveling a concrete core sample by using sulfur cement so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the preparation method of the sulfur cement comprises the following components in parts by weight: 61-65 parts of sulfur, 37-39 parts of corrosion-resistant filler, 6-9 parts of magnetic powder, 6-8 parts of flexibilizer, 4-4.5 parts of hyperdispersant and 2.5-3.5 parts of mineral admixture; the preparation is carried out according to the following steps,
firstly, heating sulfur in a heating device at 130 ℃, and adding corrosion-resistant filler in the heating process to heat the sulfur to a molten state, wherein the mixing ratio of the sulfur to the corrosion-resistant filler is 2:1; then naturally cooling and crushing the mixture to 600-800 meshes of sulfur ultrafine powder for standby;
secondly, the prepared sulfur ultrafine powder, the magnetic powder with the granularity of 100 meshes and the comprehensive toughening agent are mixed according to the following steps of
Uniformly mixing sulfur ultrafine powder, magnetic powder and comprehensive toughening agent=9+/-1:1+/-0.5:1+/-0.5 in parts by weight to obtain powder;
thirdly, placing the powder material in the second step into an enamel container for heating, continuously stirring the powder mixture, and adding a hyper-dispersant and a mineral admixture, wherein the powder is as follows: hyperdispersant: mineral admixture=3:2:1 until the sulfur in the powder mixture melts, so that the powder mixture forms slurry, and the slurry is sulfur cement, wherein the heating preparation temperature is 100-130 ℃.
A method for quickly filling up concrete core samples by using sulfur cement,
the operation flow and the key points are as follows:
preparing materials and tools, leveling floor tiles, coating a release agent, heating and melting sulfur cement, repairing and leveling concrete core samples, finishing the concrete core samples, checking two sides of the core samples in parallel, and testing compressive strength;
material, tool preparation
Preparing Ji Liuhuang clay, floor tiles, isolating agents, small shovels, heating devices, level bars, square bars, stainless steel basin, knives and concrete core samples on site;
the floor tile leveling treatment technology is a precondition for concrete core sample treatment
Selecting a leveling and stabilizing field with the thickness of 30cm to 30cm, roughly leveling by using a leveling ruler, then placing a ground tile, respectively performing primary leveling on the leveling ruler along the diagonal direction of the ground tile, adjusting by using a steel plug piece in the leveling process to ensure the leveling tube of the leveling ruler in each direction of the ground tile to be centered, finally fixing the position of the ground tile after leveling by using glass cement, and performing core sample leveling after the glass cement is solidified;
release agent
A small amount of isolating agent is taken and uniformly coated on the surface of the fixed floor tile, so that the coated area is ensured to be not smaller than the end surface area of the core sample;
the sulfur cement heating and remelting technology is a key point for concrete core sample treatment
Placing 80-120 g of sulfur cement into an iron basin, heating the iron basin, rapidly stirring the sulfur cement by an iron spoon when the sulfur cement begins to melt, grinding the sulfur cement agglomerated in the process by the iron spoon, lifting the sulfur cement placed on the heating device while stirring, controlling the heating temperature of the sulfur cement to be about 110 ℃, avoiding the deterioration of the sulfur cement caused by the overhigh temperature, and stopping heating until the sulfur cement is completely melted in the iron basin;
the concrete core sample filling technology is the key of concrete core sample treatment
Pouring the heated and melted sulfur cement on the surface of the floor tile coated with a small amount of isolating agent, ensuring that the level is measured accurately and flatly, ensuring that the area is slightly larger than the area of a concrete core sample, then accurately and quickly placing the cut concrete core sample on the melted sulfur cement, lightly pressing, controlling the perpendicularity of the core sample by using a square, waiting for 5-8 s, scraping the redundant sulfur cement along the periphery of the core sample by using a knife, taking down a core sample test piece, finishing one end face flatening of the core sample, and carrying out the other end face flatening by using the same method;
concrete core sample finishing
Taking a concrete core sample after filling, carefully scraping off redundant sulfur cement along the periphery of the core sample by using a knife, and performing fine shaping to ensure that the area of the sulfur cement is consistent with the areas of two end surfaces of the core sample, and the line shape is required to be attractive; in the finishing process, the surface of the core sample is found to have deeper depressions, the contact surface of the core sample and the sulfur cement is found to have holes, a small shovel is used for shoveling and leveling the sulfur cement, the deeper depressions of the surface of the core sample are firstly roughly leveled by the sulfur cement, and then the core sample is treated according to a concrete core sample leveling and finishing method;
parallel inspection of two sides of core sample
Measuring each concrete core sample after finishing four times by using a vernier caliper at two positions which are mutually perpendicular to each other along the height direction of a core sample test piece, and accurately measuring to 0.02mm, so as to ensure that the four measured values are extremely less than or equal to 1mm, and simultaneously, requiring the end surfaces of the two core samples to be tightly contacted and light-tight, and carrying out the filling treatment again on the concrete core samples which do not meet the conditions;
compressive Strength test
And (3) taking a concrete core sample which meets the requirements through inspection, placing the concrete core sample on the central position of a lower pressing plate of a press, and putting down an upper pressing plate of the press to ensure that the upper pressing plate and the lower pressing plate of the press are in full contact with two end faces of the core sample, so that the concrete core sample is tightly seamless, and the compression strength test can be performed on the core sample according to the standard requirements.
Preferably, the temperature of the sulfur cement is 110 ℃, and as the sulfur cement is in a melting state when the temperature reaches about 110 ℃, harmful gas can be volatilized when the temperature is too high, the sulfur cement is deteriorated, and the core sample leveling quality is affected, so that the control requirement on the heating and re-melting temperature of the sulfur cement is higher, and the core sample on-site leveling effect is combined through repeated experiments; when the sulfur cement begins to melt, the iron ladle is used for rapidly stirring the sulfur cement, the iron ladle is used for grinding the sulfur cement agglomerated in the process, and the sulfur cement placed on the electromagnetic oven is lifted up while stirring, so that the sulfur cement is prevented from deteriorating due to overhigh temperature, the heating can be stopped until the sulfur cement is completely melted in the iron basin, part of cement and fine sand can be added in the process to increase the adhesiveness and the compressive strength of the sulfur cement, and part of used sulfur cement can be added for recycling, so that the cost is saved; the rapid concrete core sample filling technology directly utilizes sulfur cement to heat at about 110 ℃ on site, and rapidly solidifies on the surface of the concrete core sample to obtain the effect of the surface level of the concrete core sample, and has the advantages of good appearance quality, uniform and consistent color, high working speed, firm and compact bonding force, no cavity, horizontal core sample end face, tight and light-proof two end faces and the like, the surface of the concrete core sample is not used for any protection, and the concrete core sample can be directly subjected to strength compression resistance after being filled; the method has the characteristics of quick and convenient operation, accurate data, small error and capability of truly reflecting the entity intensity. Compared with the traditional double-sided grinding machine for processing the core sample, the method for rapidly filling the concrete core sample with the sulfur cement has the advantages of simple tool equipment, rapid and convenient operation, high core sample processing quality, low cost, capability of replacing the double-sided grinding machine for processing the core sample, good economic and social environmental benefits and the like.
Preferably, 63 parts of sulfur, 38 parts of corrosion-resistant filler, 8 parts of magnetic powder, 7 parts of toughening agent, 4 parts of hyperdispersant and 2.5 parts of mineral admixture.
Preferably, the isolating agent is formed by stirring and mixing dry materials and water, wherein the dry materials are 0.5-1.5 parts of carboxymethyl cellulose, 10-15 parts of sodium bentonite, 50-60 parts of low-carbon coal slime, 15-20 parts of aluminum magnesium fire clay and 10-15 parts of coal dust in parts by weight, the water is 9-11 times of the total weight of the dry materials, and the isolating agent is prepared according to the following steps,
the parameter of the carboxymethyl cellulose is sodium chloride which is less than or equal to 20 parts, the dry alkali amount is less than or equal to 10 parts, and the PH is between 6 and 8; the parameters of the low-carbon coal slime are that C is more than or equal to 55 parts and water is less than or equal to 5 parts; the parameter of the aluminum-magnesium refractory clay is that the granularity is between 0 and 1mm, and the refractoriness is more than or equal to 170 ℃;
placing hot water with the weight of 10-12 times of that of the carboxymethyl cellulose in a barrel, pouring the weighed carboxymethyl cellulose into the barrel at a constant speed, stirring by adopting a stirring rod, and placing for 5-10 min after uniform stirring;
placing water with the total weight of 1.5 times of the dry materials into a stirring tank, starting a stirring device, sequentially adding weighed aluminum-magnesium refractory clay and coal dust, uniformly stirring, adding weighed sodium bentonite until no lump exists in the stirring tank, adding low-carbon coal slime, and continuously stirring until uniformity is achieved;
pouring the barrel material into a stirring tank, and stirring for at least 20 min; adding water which is 7.5-9.5 times of the total weight of the dry materials into the stirring tank, and stirring uniformly to obtain the release agent.
Preferably, the release agent is vaseline.
Preferably, the heating device is an electromagnetic oven.
Advantageous effects
1. The technology is used for filling the concrete core sample, has low cost, simple tool equipment, quick and convenient operation, does not need a double-sided grinding machine or a core sample filling instrument, shortens the processing time of the core sample, avoids the processing difficulty of the core sample which is not horizontal and parallel, reduces the potential safety hazard of the core sample processing, reduces the cost of the core sample processing and improves the accuracy of the compressive strength of the concrete core sample. The sulfur cement can be reused for three times, the usage amount is not large, and the core sample leveling cost is saved.
2. The rapid concrete core sample filling technology directly utilizes sulfur cement to heat at about 110 ℃ on site, and rapidly solidifies on the surface of the concrete core sample to obtain the effect of the surface level of the concrete core sample, and has the advantages of good appearance quality, uniform and consistent color, high working speed, firm and compact bonding force, no cavity, horizontal core sample end face, tight and opaque two end faces, and the like. Compared with the traditional double-sided grinding machine for processing the core sample, the method for rapidly filling the concrete core sample with the sulfur cement has the advantages of simple tool equipment, rapid and convenient operation, high core sample processing quality, low cost, capability of replacing the double-sided grinding machine for processing the core sample, good economic and social environmental benefits and the like.
In conclusion, the technology adopts the sulfur cement to level the concrete core sample, can replace a double-sided grinding machine to treat the concrete core sample, saves cost, is simple, quick and convenient to operate, saves time, does not need a double-sided grinding machine and a core sample level-supplementing instrument compared with the traditional design, can replace the double-sided grinding machine to treat the effect of parallel two sides of the concrete core sample, and has higher practical value and popularization significance.
Detailed Description
Example 1
The sulfur cement comprises the following components in parts by weight: 61 parts of sulfur, 37 parts of corrosion-resistant filler, 6 parts of magnetic powder, 6 parts of toughening agent, 4 parts of hyperdispersant and 2.5 parts of mineral admixture; the preparation is carried out according to the following steps,
firstly, heating sulfur in a constant-temperature oil bath at 130 ℃, and adding corrosion-resistant filler in the heating process to heat the sulfur to a molten state, wherein the mixing ratio of the sulfur to the corrosion-resistant filler is 2:1; then naturally cooling and crushing the mixture to 600-mesh sulfur ultrafine powder for standby;
secondly, uniformly mixing the prepared sulfur ultrafine powder, the magnetic powder with the granularity of 100 meshes and the comprehensive toughening agent into powder according to the weight part ratio of the sulfur ultrafine powder to the magnetic powder, wherein the comprehensive toughening agent is=9+/-1:1+/-0.5:1+/-0.5;
thirdly, placing the powder material in the second step into an enamel container for heating, continuously stirring the powder mixture, and adding a hyper-dispersant and a mineral admixture, wherein the powder is as follows: hyperdispersant: mineral admixture=3:2:1 until the sulfur in the powder mixture melts, so that the powder mixture forms slurry, and the slurry is sulfur cement, wherein the heating preparation temperature is 100-130 ℃.
A method for rapidly filling up concrete core samples by using sulfur cement is characterized in that: the operation flow and the key points are as follows:
preparing materials and tools, leveling floor tiles, coating a release agent, heating and melting sulfur cement, repairing and leveling concrete core samples, finishing the concrete core samples, checking two sides of the core samples in parallel, and testing compressive strength;
material, tool preparation
Preparing Ji Liuhuang clay, floor tiles, isolating agents, small shovels, heating devices, level bars, square bars, stainless steel basin, knives and concrete core samples on site;
the floor tile leveling treatment technology is a precondition for concrete core sample treatment
Selecting a leveling and stabilizing field with the thickness of 30cm to 30cm, roughly leveling by using a leveling ruler, then placing a ground tile, respectively performing primary leveling on the leveling ruler along the diagonal direction of the ground tile, adjusting by using a steel plug piece in the leveling process to ensure the leveling tube of the leveling ruler in each direction of the ground tile to be centered, finally fixing the position of the ground tile after leveling by using glass cement, and performing core sample leveling after the glass cement is solidified;
release agent
A small amount of isolating agent is taken and uniformly coated on the surface of the fixed floor tile, so that the coated area is ensured to be not smaller than the end surface area of the core sample;
the sulfur cement heating and remelting technology is a key point for concrete core sample treatment
Putting 80g of sulfur cement into an iron basin, heating the iron basin, rapidly stirring the sulfur cement by an iron spoon when the sulfur cement begins to melt, crushing the sulfur cement agglomerated in the process by the iron spoon, lifting the sulfur cement put on the heating device while stirring, controlling the heating temperature of the sulfur cement to be about 110 ℃, avoiding the deterioration of the sulfur cement caused by the overhigh temperature, and stopping heating until the sulfur cement is completely melted in the iron basin;
the concrete core sample filling technology is the key of concrete core sample treatment
Pouring the heated and melted sulfur cement on the surface of the floor tile coated with a small amount of isolating agent, ensuring that the level is measured accurately and flatly, ensuring that the area is slightly larger than the area of a concrete core sample, then accurately and quickly placing the cut concrete core sample on the melted sulfur cement, lightly pressing, controlling the perpendicularity of the core sample by using a square, waiting for 5s, scraping off the redundant sulfur cement along the periphery of the core sample by using a knife, taking down a core sample test piece, finishing one end face flatening of the core sample, and carrying out the other end face flatening by using the same method;
concrete core sample finishing
Taking a concrete core sample after filling, carefully scraping off redundant sulfur cement along the periphery of the core sample by using a knife, and performing fine shaping to ensure that the area of the sulfur cement is consistent with the areas of two end surfaces of the core sample, and the line shape is required to be attractive; in the finishing process, the surface of the core sample is found to have deeper depressions, the contact surface of the core sample and the sulfur cement is found to have holes, a small shovel is used for shoveling and leveling the sulfur cement, the deeper depressions of the surface of the core sample are firstly roughly leveled by the sulfur cement, and then the core sample is treated according to a concrete core sample leveling and finishing method;
parallel inspection of two sides of core sample
Measuring each concrete core sample after finishing four times by using a vernier caliper at two positions which are mutually perpendicular to each other along the height direction of a core sample test piece, and accurately measuring to 0.02mm, so as to ensure that the four measured values are extremely less than or equal to 1mm, and simultaneously, requiring the end surfaces of the two core samples to be tightly contacted and light-tight, and carrying out the filling treatment again on the concrete core samples which do not meet the conditions;
compressive Strength test
And (3) taking a concrete core sample which meets the requirements through inspection, placing the concrete core sample on the central position of a lower pressing plate of a press, and putting down an upper pressing plate of the press to ensure that the upper pressing plate and the lower pressing plate of the press are in full contact with two end faces of the core sample, so that the concrete core sample is tightly seamless, and the compression strength test can be performed on the core sample according to the standard requirements.
63 parts of sulfur, 38 parts of corrosion-resistant filler, 8 parts of magnetic powder, 7 parts of toughening agent, 4 parts of hyperdispersant and 2.5 parts of mineral admixture.
The isolating agent is formed by stirring and mixing dry materials and water, wherein the dry materials are 0.5 part by weight of carboxymethyl cellulose, 10-15 parts by weight of sodium bentonite, 50-60 parts by weight of low-carbon coal slime, 15 parts by weight of aluminum-magnesium refractory slime and 10 parts by weight of coal dust, the water is 9-11 times of the total weight of the dry materials, the isolating agent is prepared according to the following steps,
the parameter of the carboxymethyl cellulose is 10 parts of sodium chloride, 8 parts of dry alkali and pH of the carboxymethyl cellulose is between 6; the parameter C of the low-carbon coal slime is 55 parts and the moisture is 3 parts; the parameter of the aluminum-magnesium refractory clay is that the granularity is 0.5mm, and the refractoriness is 170 ℃;
placing hot water with the weight of 10 times of that of the carboxymethyl cellulose into a barrel, pouring the weighed carboxymethyl cellulose into the barrel at a constant speed, stirring by adopting a stirring rod, and standing for 5min after the stirring is uniform;
placing water with the total weight of 1.5 times of the dry materials into a stirring tank, starting a stirring device, sequentially adding weighed aluminum-magnesium refractory clay and coal dust, uniformly stirring, adding weighed sodium bentonite until no lump exists in the stirring tank, adding low-carbon coal slime, and continuously stirring until uniformity is achieved;
pouring the barrel material into a stirring tank, and stirring for at least 20 min; adding water which is 7.5-9.5 times of the total weight of the dry materials into the stirring tank, and stirring uniformly to obtain the release agent.
The isolating agent is vaseline.
The heating device is an electromagnetic oven.
Example 2
The sulfur cement comprises the following components in parts by weight: 65 parts of sulfur, 39 parts of corrosion-resistant filler, 9 parts of magnetic powder, 8 parts of toughening agent, 4.5 parts of hyperdispersant and 3.5 parts of mineral admixture; the preparation is carried out according to the following steps,
firstly, heating sulfur in a constant-temperature oil bath at 130 ℃, and adding corrosion-resistant filler in the heating process to heat the sulfur to a molten state, wherein the mixing ratio of the sulfur to the corrosion-resistant filler is 2:1; then naturally cooling and crushing the mixture to 600-800 meshes of sulfur ultrafine powder for standby;
secondly, uniformly mixing the prepared sulfur ultrafine powder, the magnetic powder with the granularity of 100 meshes and the comprehensive toughening agent into powder according to the weight part ratio of the sulfur ultrafine powder to the magnetic powder, wherein the comprehensive toughening agent is=9+/-1:1+/-0.5:1+/-0.5;
thirdly, placing the powder material in the second step into an enamel container for heating, continuously stirring the powder mixture, and adding a hyper-dispersant and a mineral admixture, wherein the powder is as follows: hyperdispersant: mineral admixture=3:2:1 until the sulfur in the powder mixture melts, so that the powder mixture forms slurry, and the slurry is sulfur cement, wherein the heating preparation temperature is 100-130 ℃.
A method for rapidly filling up concrete core samples by using sulfur cement is characterized in that: the operation flow and the key points are as follows:
preparing materials and tools, leveling floor tiles, coating a release agent, heating and melting sulfur cement, repairing and leveling concrete core samples, finishing the concrete core samples, checking two sides of the core samples in parallel, and testing compressive strength;
material, tool preparation
Preparing Ji Liuhuang clay, floor tiles, isolating agents, small shovels, heating devices, level bars, square bars, stainless steel basin, knives and concrete core samples on site;
the floor tile leveling treatment technology is a precondition for concrete core sample treatment
Selecting a leveling and stabilizing field with the thickness of 30cm to 30cm, roughly leveling by using a leveling ruler, then placing a ground tile, respectively performing primary leveling on the leveling ruler along the diagonal direction of the ground tile, adjusting by using a steel plug piece in the leveling process to ensure the leveling tube of the leveling ruler in each direction of the ground tile to be centered, finally fixing the position of the ground tile after leveling by using glass cement, and performing core sample leveling after the glass cement is solidified;
release agent
A small amount of isolating agent is taken and uniformly coated on the surface of the fixed floor tile, so that the coated area is ensured to be not smaller than the end surface area of the core sample;
the sulfur cement heating and remelting technology is a key point for concrete core sample treatment
Placing 80-120 g of sulfur cement into an iron basin, heating the iron basin, rapidly stirring the sulfur cement by an iron spoon when the sulfur cement begins to melt, grinding the sulfur cement agglomerated in the process by the iron spoon, lifting the sulfur cement placed on the heating device while stirring, controlling the heating temperature of the sulfur cement to be about 110 ℃, avoiding the deterioration of the sulfur cement caused by the overhigh temperature, and stopping heating until the sulfur cement is completely melted in the iron basin;
the concrete core sample filling technology is the key of concrete core sample treatment
Pouring the heated and melted sulfur cement on the surface of the floor tile coated with a small amount of isolating agent, ensuring that the level is measured accurately and flatly, ensuring that the area is slightly larger than the area of a concrete core sample, then accurately and quickly placing the cut concrete core sample on the melted sulfur cement, lightly pressing, controlling the perpendicularity of the core sample by using a square, waiting for 5-8 s, scraping the redundant sulfur cement along the periphery of the core sample by using a knife, taking down a core sample test piece, finishing one end face flatening of the core sample, and carrying out the other end face flatening by using the same method;
concrete core sample finishing
Taking a concrete core sample after filling, carefully scraping off redundant sulfur cement along the periphery of the core sample by using a knife, and performing fine shaping to ensure that the area of the sulfur cement is consistent with the areas of two end surfaces of the core sample, and the line shape is required to be attractive; in the finishing process, the surface of the core sample is found to have deeper depressions, the contact surface of the core sample and the sulfur cement is found to have holes, a small shovel is used for shoveling and leveling the sulfur cement, the deeper depressions of the surface of the core sample are firstly roughly leveled by the sulfur cement, and then the core sample is treated according to a concrete core sample leveling and finishing method;
parallel inspection of two sides of core sample
Measuring each concrete core sample after finishing four times by using a vernier caliper at two positions which are mutually perpendicular to each other along the height direction of a core sample test piece, and accurately measuring to 0.02mm, so as to ensure that the four measured values are extremely less than or equal to 1mm, and simultaneously, requiring the end surfaces of the two core samples to be tightly contacted and light-tight, and carrying out the filling treatment again on the concrete core samples which do not meet the conditions;
compressive Strength test
And (3) taking a concrete core sample which meets the requirements through inspection, placing the concrete core sample on the central position of a lower pressing plate of a press, and putting down an upper pressing plate of the press to ensure that the upper pressing plate and the lower pressing plate of the press are in full contact with two end faces of the core sample, so that the concrete core sample is tightly seamless, and the compression strength test can be performed on the core sample according to the standard requirements.
63 parts of sulfur, 38 parts of corrosion-resistant filler, 8 parts of magnetic powder, 7 parts of toughening agent, 4 parts of hyperdispersant and 2.5 parts of mineral admixture.
The isolating agent is formed by stirring and mixing dry materials and water, wherein the dry materials are 1.5 parts of carboxymethyl cellulose, 15 parts of sodium bentonite, 60 parts of low-carbon coal slime, 20 parts of aluminum-magnesium fire clay and 15 parts of coal dust in parts by weight, the water is 11 times of the total weight of the dry materials, the isolating agent is prepared according to the following steps,
the parameter of the carboxymethyl cellulose is 20 parts of sodium chloride, 10 parts of dry alkali and pH of the carboxymethyl cellulose is between 8; the parameter C of the low-carbon coal slime is 70 parts and the moisture is 5 parts; the parameters of the aluminum-magnesium refractory clay are that the granularity is between 1mm and the refractoriness is 200 ℃;
placing hot water with the weight of 12 times of that of the carboxymethyl cellulose into a barrel, pouring the weighed carboxymethyl cellulose into the barrel at a constant speed, stirring by adopting a stirring rod, and standing for 10min after the stirring is uniform;
placing water with the total weight of 1.5 times of the dry materials into a stirring tank, starting a stirring device, sequentially adding weighed aluminum-magnesium refractory clay and coal dust, uniformly stirring, adding weighed sodium bentonite until no lump exists in the stirring tank, adding low-carbon coal slime, and continuously stirring until uniformity is achieved;
pouring the barrel material in the steps into a stirring tank, and stirring for 30min; adding water with the weight 9.5 times of the total weight of the dry materials into the stirring tank, and stirring uniformly to obtain the release agent.
The isolating agent is vaseline.
The heating device is an electromagnetic oven.
Benefit analysis
1. Economic benefit
The construction method is successfully tested by the unit of I through Kunming in Shang Cheng # land block project, and compared with the traditional method for treating concrete core samples by a double-sided grinding machine, the construction method adopts sulfur cement, a heating device, a release agent and other auxiliary tools. And carrying out economic benefit analysis on the two methods according to the leveling treatment of the concrete core sample:
1) Traditional double-sided grinding machine
Labor cost: negligible (project technician treatment)
Material cost: negligible (Water fee and electric charge)
The cost of the instrument and the equipment is as follows: double-sided grinding machine=11000 yuan/table (with two grinding heads)
Maintenance cost: negligible in all
And (5) summation: 11000 yuan
2) Construction method for quickly leveling concrete core sample by using sulfur cement
Labor cost: negligible (project technician treatment)
Material cost: sulphur cement=300 yuan/bag (5 kg, can mend 50 concrete core samples with 100mm diameter, each cost 6 yuan)
Tool fee: other tool charge = 200 yuan (heating means about 150 yuan, isolating agent about 16 yuan, square about 15 yuan, other 19 yuan)
And (5) summation: 500 yuan
Compared with the traditional double-sided grinding machine, the construction method for quickly filling up the concrete core sample by using the sulfur cement can save the cost by 10500 yuan.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A method for rapidly filling up concrete core samples by using sulfur cement is characterized in that: the operation flow and the key points are as follows: preparing materials and tools, leveling floor tiles, coating a release agent, heating and melting sulfur cement, filling a concrete core sample, trimming the concrete core sample, checking two sides of the core sample in parallel, and testing compressive strength;
s1: material, tool preparation
Preparing Ji Liuhuang clay, floor tiles, isolating agents, small shovels, heating devices, level bars, square bars, stainless steel basin, knives and concrete core samples on site;
s2: floor tile leveling treatment
Selecting a leveling and stabilizing field with the thickness of 30cm to 30cm, roughly leveling by using a leveling ruler, then placing a ground tile, respectively performing primary leveling on the leveling ruler along the diagonal direction of the ground tile, adjusting by using a steel plug piece in the leveling process to ensure the leveling tube of the leveling ruler in each direction of the ground tile to be centered, finally fixing the position of the ground tile after leveling by using glass cement, and performing core sample leveling after the glass cement is solidified;
s3: release agent
A small amount of isolating agent is taken and uniformly coated on the surface of the fixed floor tile, so that the coated area is ensured to be not smaller than the end surface area of the core sample;
s4: heating and remelting sulfur cement
Putting 80-120 g of sulfur cement into an iron basin, heating the iron basin, rapidly stirring the sulfur cement by an iron spoon when the sulfur cement begins to melt, grinding the sulfur cement agglomerated in the process by the iron spoon, and lifting the sulfur cement placed on the heating device while stirring until the sulfur cement is completely melted in the iron basin, so that the heating can be stopped;
s5: concrete core sample filling
Pouring the heated and melted sulfur cement on the surface of the floor tile coated with a small amount of isolating agent, ensuring that the level is measured accurately and flatly, ensuring that the area is slightly larger than the area of a concrete core sample, then accurately and quickly placing the cut concrete core sample on the melted sulfur cement, lightly pressing, controlling the perpendicularity of the core sample by using a square, waiting for 5-8 s, scraping the redundant sulfur cement along the periphery of the core sample by using a knife, taking down a core sample test piece, finishing one end face flatening of the core sample, and carrying out the other end face flatening by using the same method;
s6: concrete core sample finishing
Taking a concrete core sample after filling, carefully scraping off redundant sulfur cement along the periphery of the core sample by using a knife, and performing fine shaping to ensure that the area of the sulfur cement is consistent with the areas of two end surfaces of the core sample, and the line shape is required to be attractive; in the finishing process, the surface of the core sample is found to have deeper depressions, the contact surface of the core sample and the sulfur cement is found to have holes, a small shovel is used for shoveling and leveling the sulfur cement, the deeper depressions of the surface of the core sample are firstly roughly leveled by the sulfur cement, and then the core sample is treated according to a concrete core sample leveling and finishing method;
s7: parallel inspection of two sides of core sample
Measuring each concrete core sample after finishing four times by using a vernier caliper at two positions which are mutually perpendicular to each other along the height direction of a core sample test piece, and accurately measuring to 0.02mm, so as to ensure that the four measured values are extremely less than or equal to 1mm, and simultaneously, requiring the end surfaces of the two core samples to be tightly contacted and light-tight, and carrying out the filling treatment again on the concrete core samples which do not meet the conditions;
s8: compressive Strength test
The concrete core sample which meets the requirement through inspection is taken and placed on the center position of a lower pressing plate of a press, an upper pressing plate of the press is put down, the upper pressing plate and the lower pressing plate of the press are enabled to be in full contact with two end faces of the core sample, and the compression strength test can be carried out on the core sample according to the standard requirement;
the sulfur cement in the step S1 comprises the following components in parts by weight: 61-65 parts of sulfur, 37-39 parts of corrosion-resistant filler, 6-9 parts of magnetic powder, 6-8 parts of flexibilizer, 4-4.5 parts of hyperdispersant and 2.5-3.5 parts of mineral admixture, and is prepared according to the following steps:
sp1: heating sulfur in a constant temperature oil bath at 130 ℃, and adding corrosion-resistant filler in the heating process to heat the sulfur to a molten state, wherein the mixing ratio of the sulfur to the corrosion-resistant filler is 2:1; then naturally cooling and crushing the mixture to 600-800 meshes of sulfur ultrafine powder for standby;
sp2: uniformly mixing the prepared sulfur ultrafine powder, the magnetic powder with the granularity of 100 meshes and the toughening agent into powder according to the weight part ratio of the sulfur ultrafine powder to the toughening agent=9+/-1:1+/-0.5:1+/-0.5;
sp3: placing Sp2 powder into an enamel container for heating, continuously stirring the powder, and adding a hyper-dispersant and a mineral admixture, wherein the powder is prepared by the following steps of: hyperdispersant: mineral admixture = 3:2:1 until the sulphur in the powder mixture melts, causing the powder mixture to form a slurry, the slurry being sulphur cement, wherein the heating formulation temperature is 100 ℃ -130 ℃.
2. The method for rapid leveling of a concrete core sample with sulfur cement according to claim 1, wherein: 63 parts of sulfur, 38 parts of corrosion-resistant filler, 8 parts of magnetic powder, 7 parts of toughening agent, 4 parts of hyperdispersant and 2.5 parts of mineral admixture.
3. The method for rapid leveling of a concrete core sample with sulfur cement according to claim 1, wherein: the isolating agent is formed by stirring and mixing dry materials and water, wherein the dry materials comprise, by weight, 0.5-1.5 parts of carboxymethyl cellulose, 10-15 parts of sodium bentonite, 50-60 parts of low-carbon coal slime, 15-20 parts of aluminum magnesium fire clay and 10-15 parts of coal dust, the water is 9-11 times of the total weight of the dry materials, the parameter of the carboxymethyl cellulose is less than or equal to 20 parts of sodium chloride, the dry alkali amount is less than or equal to 10 parts, and the PH is between 6 and 8; the parameters of the low-carbon coal slime are that C is more than or equal to 55 parts and water is less than or equal to 5 parts; the parameter of the aluminum-magnesium refractory clay is that the granularity is between 0 and 1mm, and the refractoriness is more than or equal to 170 ℃;
the preparation is carried out according to the following steps,
spe1: placing hot water with the weight of 10-12 times of that of the carboxymethyl cellulose into a barrel, pouring the weighed carboxymethyl cellulose into the barrel at a constant speed, stirring by adopting a stirring rod, and standing for 5-10 min after the stirring rod is uniformly used;
spe2: placing water with the total weight of 1.5 times of the dry materials into a stirring tank, starting a stirring device, sequentially adding weighed aluminum-magnesium refractory clay and coal dust, uniformly stirring, adding weighed sodium bentonite until no lump exists in the stirring tank, adding low-carbon coal slime, and continuously stirring until uniformity is achieved;
spe3: pouring the Spe1 and Spe2 step barrels into a stirring tank, and stirring for at least 20 min; adding water which is 7.5-9.5 times of the total weight of the dry materials into the stirring tank, and stirring uniformly to obtain the release agent.
4. The method for rapid leveling of a concrete core sample with sulfur cement according to claim 1, wherein: the isolating agent is vaseline.
5. The method for rapid leveling of a concrete core sample with sulfur cement according to claim 1, wherein: the heating device is an electromagnetic oven.
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