CN112919877A - Method for preparing light energy-saving building wall material by adopting high-content steel slag - Google Patents

Method for preparing light energy-saving building wall material by adopting high-content steel slag Download PDF

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Publication number
CN112919877A
CN112919877A CN202110355427.3A CN202110355427A CN112919877A CN 112919877 A CN112919877 A CN 112919877A CN 202110355427 A CN202110355427 A CN 202110355427A CN 112919877 A CN112919877 A CN 112919877A
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China
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steel slag
light energy
wall material
building wall
parts
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雷国元
王宗森
魏中华
郭卫东
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Anhui Masteel KWah New Building Materials Co ltd
Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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Anhui Masteel KWah New Building Materials Co ltd
Wuhan University of Science and Engineering WUSE
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    • 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
    • C04B28/14—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 calcium sulfate cements
    • C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
    • C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • C04B18/142—Steelmaking slags, converter slags
    • 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
    • C04B2111/40—Porous or lightweight materials
    • 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
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • 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
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a method for preparing a light energy-saving building wall material by adopting high-content steel slag, which solves the problems of low utilization rate, low additional value and low consumption of the existing steel slag. 40-50 parts of steel slag, 10-20 parts of clinker, 0-20 parts of blast furnace slag, 40-50 parts of fly ash and 5 parts of desulfurized gypsum powder; mixing, adding 0.02-0.05% of grinding-aid early strength agent, and finely grinding; adding 0-2% of reinforcing fiber into the mixture after fine grinding; mixing with the foamed slurry, and adding a water reducing agent; after being stirred uniformly, the mixture is poured into a mould; and curing the test piece for 1d under the constant humidity condition at 30 ℃, demolding, curing for 3-6 d under the constant humidity condition at 35-65 ℃, and then naturally curing to 28d to prepare the qualified light energy-saving wall material. The utilization rate of the solid waste can reach 90 percent, and the utilization rate of the steel slag can reach more than 42.5 percent.

Description

Method for preparing light energy-saving building wall material by adopting high-content steel slag
Technical Field
The invention relates to a method for coupling comprehensive utilization of metallurgical solid wastes with preparation of energy-saving building wall materials, in particular to a method for preparing light energy-saving building wall materials by adopting high-content steel slag.
Background
The steel slag is waste slag generated in the steel making process, and the yield is 12-15% of the yield of the crude steel. The annual output of steel slag in China in 2019 is nearly 1.5 hundred million tons, and the comprehensive utilization rate of the steel slag is less than 40 percent at present. The discharge amount of the steel slag is continuously increased, and the accumulated stockpiling exceeds 10 hundred million tons. The stockpiling not only occupies land, but also seriously pollutes the environment, and is a key target for national environmental protection supervision. The steel slag can be used as a cement mixture, but the doping amount of f-CaO is limited; when the aggregate is used as concrete aggregate, the volume stability of the concrete is influenced; the asphalt concrete is used for road asphalt concrete, although the effect is good, the dosage is limited due to the transportation radius. Therefore, the development and utilization technology of high steel slag mixing amount, high added value and large product sale radius is always a difficult problem. The fabricated building needs a large amount of light wall materials, and the ratio of the residential area to the wall material area is 1: (3-3.5), the preparation of the lightweight wall material by using the high-content steel slag is one of important ways for solving the problem of comprehensive utilization of the steel slag. The steel slag is used for preparing wall materials and is researched more.
The patent CN103274717A takes cement, steel slag, micro silicon powder and nano ceramic powder as raw materials to prepare the composite foaming insulation board, and the steel slag addition rate is lower than 15%; patent CN 111943615a utilizes: preparing a heat-insulating wall material by using cement, lime, fly ash, steel slag powder, recycled aggregate, expanded and vitrified micro bubbles and the like as raw materials, wherein the steel slag doping rate is lower than 13%, lime is used for providing alkali-activated fly ash activity, and f-CaO in the steel slag powder is not fully utilized; the light heat-insulating wall material prepared by the patent CN 110698091A adopts a high-temperature sintering method, and the steel slag addition rate is lower than 20%; in the patent CN 106220109A, the steel slag ceramsite, the steel slag composite material, the fly ash, the light filling particles and the like are used for preparing the thermal insulation wall material, the use amount of the fly ash is very low, and the problem of eliminating the f-CaO hazard in the steel slag powder by using the fly ash is not involved. In patent CN 105272089A, steel slag, a composite exciting agent, slag micropowder, fly ash and the like are used for preparing an aerated partition board, and the harm of f-CaO in the steel slag micropowder is eliminated by using active excitation and the fly ash, but the steel slag addition rate is lower than 30% by adopting a steam curing method.
In the literature 'application research of metallurgical slag in concrete hollow partition wall boards', the utilization rate of steel slag powder is only 8%. In the literature 'preparation research of alkali-activated steel slag micropowder autoclaved aerated concrete', 6% of water glass is added to activate the activity of the steel slag under a strong alkaline condition, and under the curing condition of 60 ℃, the 28d compressive strength is 4.0MPa, the using amount of an activator is large, the cost is high, and the curing temperature is high. In the experimental study of the novel lightweight steel slag aerated concrete, the steel slag mixing amount is 30%, 6% of water glass is added to carry out strong alkaline excitation, and the 28d compressive strength is 3.43MPa when the density is 800 under the curing condition of 60 ℃.
The Chinese patent application No. 201811095726.2, published as 2018, 12 and 11, discloses a lightweight wall material made of steel slag. The patent formula comprises the following raw materials in percentage by weight: 1-5% of steel slag, 1-5% of cement, 2-4% of fine sand, 5-13% of fly ash, 15-20% of aluminum-rich waste, 8-10% of biomass material and 5-7% of foaming agent. However, the steel slag adding amount is less than 5%, and the significance for preparing the light wall material by using the steel slag is not great.
Therefore, the problem of preparing the light-weight, high-strength and energy-saving wall material under the conditions of high steel slag mixing amount, high solid waste utilization rate, temperature and excitation and maintenance is not solved all the time.
Disclosure of Invention
1. Problems to be solved
Aiming at the problem that the utilization rate of steel slag in the existing wall material is not high, the invention aims to provide a light-weight high-strength energy-saving wall material prepared under the conditions of high steel slag mixing amount, high solid waste utilization rate, mild excitation condition and maintenance condition.
2. Technical scheme
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a method for preparing a light energy-saving building wall material by adopting high-content steel slag comprises the following steps: mixing 40-50 parts of steel slag, 40-50 parts of fly ash, 5-20 parts of clinker, 0-20 parts of blast furnace slag and 5 parts of desulfurized gypsum to obtain an inorganic solid raw material; adding a grinding-aid early strength agent with the mass of 0.02-0.05% of the mass of the inorganic solid raw material, and finely grinding; after fine grinding, adding reinforcing fibers accounting for 0-2% of the mass of the inorganic solid raw material; mixing with the foamed slurry, and adding a water reducing agent; after being uniformly stirred, the mixture is poured into a mould to form a pouring material; and curing the test piece for 1d under the constant humidity condition at 30 ℃, demolding, curing for 3-6 d under the constant humidity condition at 35-65 ℃, and then naturally curing to 28d to prepare the qualified light energy-saving wall material.
Further, the raw materials used in the above preparation method include inorganic solid raw materials and organic raw materials, wherein the inorganic solid raw materials include the following:
40-50 parts of steel slag,
40-50 parts of fly ash,
5-20 parts of clinker aggregate,
0 to 20 parts of blast furnace slag,
5 parts of desulfurized gypsum;
the organic raw materials include the following:
the grinding-assisting early strength agent is 0.02-0.05% of the inorganic solid raw material;
the reinforced fiber is 0-2% of the inorganic solid raw material;
the foaming slurry is 0.02-0.05% of the inorganic solid raw material, wherein the foaming slurry is an aqueous solution of an FP-180 type animal protein foaming agent with the mass percentage concentration of 4-6%;
the concrete water reducing agent is 0.6-1.0% of the inorganic solid raw material.
Further, after the steel slag, the cement clinker and the blast furnace slag are crushed to 0.5-1 mm, the crushed materials are mixed with the fly ash and the desulfurized gypsum for fine grinding.
Further, the specific surface area of the mixture after fine grinding is more than or equal to 500kg/m2。
Further, CaSO in the desulfurized gypsum4·2H2The content of O is more than or equal to 80 percent.
Further, the grinding aid early strength agent comprises (a) 60-75% of ester compounds by the total weight of the modified grinding aid early strength agent, (b) 5-15% of polyacrylic acid by the total weight of the modified grinding aid early strength agent, and (c) 15-35% of triethanolamine and acrylic acid monomers by the total weight of the modified grinding aid early strength agent, wherein the weight of the triethanolamine monomers is 10-30% of the total weight of the modified grinding aid early strength agent, the weight of the acrylic acid monomers is 0-5% of the total weight of the modified grinding aid early strength agent, and the ester compounds are triethanolamine and acrylic acid esterification products. The formed triethanolamine-acrylic polymer, acrylic acid condensate, triethanolamine monomer and acrylic acid monomer have the grinding-aiding effect and have the synergistic effect; the triethanolamine-acrylic acid polymer and the triethanolamine monomer have early strength, and the acrylic acid condensate has water reducing effect, which are favorable for improving the strength of the hydrated product. Therefore, the grinding aid has the functions of grinding aid and early strength, and the components have synergistic effect.
Further, the preparation method of the grinding-aid early strength agent comprises the following steps: adding water into triethanolamine and acrylic acid, uniformly mixing, heating while stirring, reacting for 3-4 hours at 60-80 ℃, and cooling the solution to room temperature to obtain the grinding-aid early strength agent, wherein the triethanolamine, the acrylic acid and the water are in parts by weight:
35-55 parts of triethanolamine;
40-50 parts of acrylic acid;
50-120 parts of water.
Further, in the preparation method of the grinding-aid early strength agent, when the raw materials are placed in a round-bottom flask for reaction, the raw materials are stirred uniformly by a magnetic stirrer for stirring, a condensation reflux device is added, the heating is stopped after the reaction is carried out for 3-4 hours, the stirring is continued, the stirring speed is 350 r/min-550 r/min, and the grinding-aid early strength agent is obtained after the solution is cooled to the room temperature.
Furthermore, the reinforcing fiber is plant fiber or glass fiber with the length of 4-6 mm, and is used when being mixed with the finely ground mixture, and the using amount of the reinforcing fiber is 0-2% of that of the inorganic solid raw material.
Further, the foaming slurry is an aqueous solution of an FP-180 type animal protein foaming agent with the mass percentage concentration of 4-6%, and the average bubble particle size after foaming by a foaming device is 1-2 mm.
Further, the foaming slurry is 0.02-0.05% of the inorganic solid raw material, and the water reducing agent is 0.6-1.0% of the inorganic solid raw material.
Furthermore, in the process of forming the pouring material, after 1-2 cm of protective layers are respectively reserved on the upper surface and the lower surface in the thickness direction of the plate, reinforcing fiber mesh cloth is uniformly distributed in the thickness direction.
Specifically, the method for preparing the light energy-saving building wall material by adopting the high-content steel slag comprises the following steps:
1) block and granular crushing: crushing the steel slag, the cement clinker and the blast furnace slag to 0.5-1 mm, and then grinding;
2) mixing and finely grinding inorganic solid raw materials: mixing the crushed steel slag, cement clinker, blast furnace slag, fly ash and desulfurized gypsum powder according to a set proportion, then feeding the mixture into a pulverizer for grinding, uniformly spraying a grinding-aid early strength agent with the mass fraction of 0.02-0.05% of inorganic solid raw materials during grinding, and grinding the materials until the specific surface area is more than or equal to 500kg/m2；
3) Adding of reinforcing fibers: adding the ground material into reinforcing fibers with the length of 4-6 mm;
4) preparing foaming slurry: ventilating and foaming in the water solution of the foaming agent by using a foaming machine, wherein the average bubble particle size is 1-2 mm after foaming by a foaming device;
5) preparing a pouring material: according to the requirement of 120 plates in GB/T23450-2009, the dry density of the product after 28 days is (800 +/-10) kg/m3Designing, controlling the proportion of the finely ground mixture to the foaming slurry, adding a water reducing agent, and stirring and mixing uniformly;
6) casting a blank body: uniformly pouring the castable into a wall material mold, and if reinforcing fiber mesh cloth is added during pouring, respectively reserving 1-2 cm protective layers above and below the wall material mold in the thickness direction, and then uniformly distributing the castable in the thickness direction according to the number of the mesh cloth;
7) demolding and maintaining: after pouring, curing the test piece for 1d under the condition of constant humidity at the temperature of 30 ℃, and then demolding to ensure that the blank body obtains strength; curing for 3-6 days at the constant humidity of 35-65 ℃ to obtain f-CaO and SiO2、Al2O3Fully reacting; and then, transferring to natural maintenance for 28 days to prepare the qualified light energy-saving wall material.
The light energy-saving building wall material obtained by the preparation method meets the specified requirements in the technical standard of JGT 169-2005 building partition wall light batten and the national standard of GBT 23450-2009 building partition wall heat-insulating batten in the standard industry.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention creates the optimal particle size distribution by grinding aid, thereby improving the mechanical excitation effect; the activity of the steel slag is stimulated through dissolution and release of f-CaO; by SiO in fly ash2、Al2O3The reaction with f-CaO eliminates the negative effect of f-CaO and improves the strength; f-CaO and SiO are accelerated by increasing the early curing temperature (constant humidity condition of 40-65℃)2、Al2O3The reaction serves to suppress the negative effect of the carbonization reaction on the strength. The relevant chemical reactions after self-contact with water are as follows:
CaO+H2O→Ca(OH)2，
mCa(OH)2+SiO2+nH2O→mCaO·SiO2·(n+m)H2O，
3Ca(OH)2+Al2O3+3CaSO4·2H2O+26H2O→3CaO·Al2O3·3CaSO4·32H2O。
the invention does not use high-dose alkaline activator, but utilizes Ca (OH) released by CaO in the steel slag2As a chemical activator, the light-weight high-strength energy-saving wall material is prepared under mild excitation conditions and curing conditions, the quality reaches the national standard, the utilization rate of solid waste is more than 90 percent, and the addition rate of steel slag is more than 42.5 percent;
(2) according to the invention, the triethanolamine is modified by using the acrylic acid to serve as the steel slag early strength grinding aid, and as the steel slag is different from a cement material and the content of clinker in the steel slag is far smaller than that of cement, the existing research finds that the more ester substances in the early strength grinding aid are, the best early strength grinding aid effect is achieved; the grinding-aid early strength agent is provided for grinding steel slag, and the inventor finds for the first time that the utilization rate of the steel slag is higher by matching the synergistic effect of polyacrylic acid, alcohol amine and acrylic acid monomers under the condition that the more ester compounds are better and the ester compounds account for 60-75% of the weight of the steel slag in grinding; the specific analysis is as follows:
ester compounds formed by reaction in the grinding-aid early strength agent change the original bond length and bond type of alcohol amine compounds, so that more polar molecules can be adsorbed on the surfaces of particles by monomolecular or polymolecular layers, the surface energy of the particles is reduced, and the tendency of agglomeration of the particles due to mutual attraction is weakened; the ester compound adsorbed on the surface of the particles forms a layer of film on the surface of the particles, so that the flowability of the particles is improved, the crushing force of the particles in the grinding process is more uniform, the particle size distribution of the particles is more concentrated, the phenomena of over-coarse and over-grinding of the particles are prevented, the content of the particles with the key effect on the strength of 3-32 mu m is increased, and the grinding energy consumption can be saved; in addition, the ester compounds adsorbed on the surfaces of the particles can enable original cracks to continue to develop and enable large particles to be broken, so that a grinding aid effect is achieved; meanwhile, the more polar groups of the molecules, the stronger the polarity of the groups, the better the early strength effect of the medicament, the ester bond of the polar groups introduced into the generated esterified substance, the structure and the property of the alcamines are changed, and the C in the cementing material can be promoted simultaneously3A、C3S hydration promotes the generation of C-A-H, accelerates the growth of C-S-H gel and C-A-S-H gel, increases the yield of AFt, improves the gridding degree of a system, and accelerates the hydration reaction speed; unsaturated hydrocarbon bonds in the esterified compounds change the balance structure of molecules of the alcohol amine compounds, so that an unshared pair of electrons on N atoms in the molecules of the alcohol amine compounds can more easily form covalent bonds with metal cations to generate more stable chelates, the chelates can form a plurality of soluble regions in a solution, the diffusion rate of hydration products is improved, and the particle surface C at the initial stage of hydration is caused to be3The hydrate layer of A is destroyed, and C is further increased3The dissolution rate of A is increased, thereby accelerating the dissolution of A and CaSO4After reaction, AFt is rapidly generated. Ca in the system2+、Al3+The concentration is reduced, which in turn promotes C3S、C2S hydration reaction is carried out to generate more C-S-HThe system is more compact due to the gel, so that the hydration reaction speed is accelerated;
the generated esterified substance also has an emulsifying effect, is doped into a steel slag composite cementing material system, is adsorbed on the surface of material particles to form a layer of charged hydrophilic film, so that the surface tension of slurry is reduced, the infiltration and permeation of water molecules on the particles are enhanced, the particles are more fully contacted with the water molecules, the volume expansion of a solid phase body caused by hydration is enhanced, a coking layer of the particles is continuously peeled off, the hydrolysis of the particles is promoted, and the hydration reaction is accelerated;
in addition, the alcamines monomer also has stronger early strength function; the formed polycarboxylic acid also has good water reducing effect, and the strength of a sample after the steel slag is hydrated can be obviously improved. Therefore, under the synergistic effect of the above-mentioned several factors, the early-strengthening effect can be strengthened. The technology realizes the preparation of the grinding aid and early strength agent suitable for the utilization of the steel slag under the conditions of simple process and no pursuit of high yield of esterification products;
(3) in the steel slag, Si-O covalent bonds and Ca-O ionic bonds mainly exist, the Ca-O ionic bonds are preferentially broken in the grinding process, and after the Ca-O bonds are broken, Ca on two sides of the broken bonds is generated due to the generation of electron density difference2+And O2-The active points are formed, so that the cross sections have the tendency of mutual attraction or are polymerized into new large particles; the ester compound provides external ions and molecules, and the ions and molecules are adsorbed on the cross section to meet unsaturated electrovalence bonds, so that the aggregation tendency of particles is weakened, and the cross section is prevented from polymerizing again; after the agglomeration is eliminated, the mechanical work can better act on single particles, thereby improving the grinding efficiency; in addition, the formed acrylic acid condensation compound, the alcohol amine monomer and the acrylic acid monomer also have good grinding-aid effect and have synergistic effect with each other; therefore, although the temperature is lower and no catalyst is added, the yield of the ester compound formed by the reaction is slightly lower, and the overall grinding aid effect is still better.
Drawings
FIG. 1 is a flow chart of the present invention for preparing lightweight energy-saving building wall material with high steel slag content.
Detailed Description
The invention is further described with reference to specific examples.
In the examples, the raw materials used included inorganic solid raw materials and organic raw materials, wherein the inorganic solid raw materials included the following:
40-50 parts of steel slag,
40-50 parts of fly ash,
5-20 parts of clinker aggregate,
0 to 20 parts of blast furnace slag,
5 parts of desulfurized gypsum;
the organic raw materials include the following:
the grinding-assisting early strength agent is 0.02-0.05% of the inorganic solid raw material;
the reinforced fiber is 0-2% of the inorganic solid raw material;
the foaming slurry is 0.02-0.05% of the inorganic solid raw material, wherein the foaming slurry is an aqueous solution of an FP-180 type animal protein foaming agent with the mass percentage concentration of 4-6%;
the concrete water reducing agent is 0.6-1.0% of the inorganic solid raw material.
The preparation method of the grinding-aid early strength agent in the embodiment comprises the following raw materials in parts by weight:
50 parts of triethanolamine;
50 parts of acrylic acid;
100 parts of water;
the method comprises the following steps:
(1) weighing the raw materials according to the proportion, and putting the raw materials into a round-bottom flask to be uniformly mixed;
(2) putting the round-bottom flask into a magnetic stirrer, wherein the rotating speed is 500r/min, the temperature is 70 ℃, adding a condensation reflux device, and reacting for 3 hours;
(3) stopping heating, continuing stirring, and cooling the solution to room temperature to obtain the grinding-aid early strength agent for later use.
The content of various substances of the obtained grinding aid early strength agent is measured by adopting a liquid chromatography, and the organic matter of the grinding aid early strength agent is calculated to be 71.3 percent of ester compound, 13.4 percent of polyacrylic acid, 12.8 percent of alcohol amine monomer and 2.5 percent of acrylic acid monomer.
Table 1 formulations of the examples of the invention
Figure BDA0003003547430000071
Example 1
As shown in fig. 1, the inorganic solid raw material of this embodiment includes 44 parts of steel slag, 8 parts of clinker, 0 part of blast furnace slag, 43 parts of fly ash, and 5 parts of desulfurized gypsum powder; the spraying amount of the grinding-aid early strength agent is 0.03 percent of that of the solid material during grinding, and the specific surface area of the ground material is 520kg/m2(ii) a Adding glass fiber with the length of 4-6 mm into the powder grinding, wherein the mass of the glass fiber is 0.5% of that of the powder grinding material; the average diameter of bubbles in the foaming slurry is 1mm, the requirement of 120 plates in GB/T23450-2009 is met, and the dry density of the product after 28 days is (800 +/-10) kg/m3Designing, adding the amount of foaming slurry and the amount of water reducing agent shown in the table 1; pouring; and curing the test piece at 30 ℃ for 1d, demoulding, curing at 60 ℃ for 4d, and naturally curing to 28d to prepare the qualified light energy-saving wall material. The dry density of the product is 806kg/m3And the 28d compressive strength is 6.1MPa, the heat conductivity coefficient is 0.156 w/m.K, and the requirements of the light batten for the building partition wall in the technical standard of JGT 169-.
Example 2
As shown in fig. 1, the inorganic solid raw material of this embodiment includes 43 parts of steel slag, 10 parts of clinker, 0 part of blast furnace slag, 42 parts of fly ash, and 5 parts of desulfurized gypsum powder; the spraying amount of the grinding-aid early strength agent is 0.03 percent of that of the solid material during grinding, and the specific surface area of the ground material is 502kg/m2(ii) a The average diameter of bubbles in the foaming slurry is 1mm, the requirement of 120 plates in GB/T23450-2009 is met, and the dry density of the product after 28 days is (800 +/-10) kg/m3Designing, adding the amount of foaming slurry and the amount of water reducing agent shown in the table 1; pouring, and adding three layers of glass fiber mesh cloth; and curing the test piece at 30 ℃ for 1d, demoulding, curing at 55 ℃ for 5d, and naturally curing to 28d to prepare the qualified light energy-saving wall material. The dry density of the product is 810kg/m328d compressive strength of6.5MPa and the heat conductivity coefficient of 0.157 w/m.K, and meets the specified requirements in the technical standard of JGT 169 and 2005 heat-insulating strip plate for the partition wall of the building of the national standard of GBT 23450 and 2009.
Example 3
As shown in fig. 1, the inorganic solid raw material of this embodiment includes 40 parts of steel slag, 10 parts of clinker, 10 parts of blast furnace slag, 35 parts of fly ash, and 5 parts of desulfurized gypsum powder; the spraying amount of the grinding-aid early strength agent is 0.03 percent of that of the solid material during grinding, and the specific surface area of the ground material is 518kg/m2(ii) a The average diameter of bubbles in the foaming slurry is 1mm, the requirement of 120 plates in GB/T23450-2009 is met, and the dry density of the product after 28 days is (800 +/-10) kg/m3Designing, adding the amount of foaming slurry and the amount of water reducing agent shown in the table 1; pouring, and adding three layers of glass fiber mesh cloth; and curing the test piece at 30 ℃ for 1d, demoulding, curing at 50 ℃ for 6d, and naturally curing to 28d to prepare the qualified light energy-saving wall material. The dry density of the product is 795kg/m3And 28d, the compressive strength is 7.1MPa, the heat conductivity coefficient is 0.155 w/m.K, and the requirements of the light batten for the partition wall of the building of JGT 169-.
Example 4
As shown in fig. 1, the inorganic solid raw material of this embodiment includes 50 parts of steel slag, 5 parts of clinker, 0 part of blast furnace slag, 40 parts of fly ash, and 5 parts of desulfurized gypsum powder; the spraying amount of the grinding-aid early strength agent is 0.03 percent of that of the solid material during grinding, and the specific surface area of the ground material is 520kg/m2(ii) a Adding glass fiber with the length of 4-6 mm into the powder grinding, wherein the mass of the glass fiber is 2% of that of the powder grinding material; the average diameter of bubbles in the foaming slurry is 1mm, the requirement of 120 plates in GB/T23450-2009 is met, and the dry density of the product after 28 days is (800 +/-10) kg/m3Designing, adding the amount of foaming slurry and the amount of water reducing agent shown in the table 1; pouring; and curing the test piece at 30 ℃ for 1d, demoulding, curing at 60 ℃ for 4d, and naturally curing to 28d to prepare the qualified light energy-saving wall material. The dry density of the product is 830kg/m3The 28d compressive strength is 5.8MPa, the heat conductivity coefficient is 0.16 w/m.K, and the heat conductivity coefficient accords with the technical standard of the standard industryThe light batten for the JGT 169 and 2005 building partition wall and the heat preservation batten for the national standard GBT 23450 and 2009 building partition wall.
The above description is a more detailed description of the present invention with reference to specific preferred embodiments, and it is not intended to limit the present invention to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications, additions, substitutions, and the like can be made without departing from the spirit of the invention.

Claims (10)

1. A method for preparing a light energy-saving building wall material by adopting high-content steel slag is characterized by comprising the following steps of: the method comprises the following steps: mixing 40-50 parts of steel slag, 40-50 parts of fly ash, 5-20 parts of clinker, 0-20 parts of blast furnace slag and 5 parts of desulfurized gypsum to obtain an inorganic solid raw material; adding a grinding-aid early strength agent with the mass of 0.02-0.05% of the mass of the inorganic solid raw material, and finely grinding; after fine grinding, adding reinforcing fibers accounting for 0-2% of the mass of the inorganic solid raw material; mixing with the foamed slurry, and adding a water reducing agent; after being uniformly stirred, the mixture is poured into a mould to form a pouring material; and curing the test piece for 1d under the constant humidity condition at 30 ℃, demolding, curing for 3-6 d under the constant humidity condition at 35-65 ℃, and then naturally curing to 28d to prepare the qualified light energy-saving wall material.
2. The method for preparing the light energy-saving building wall material by adopting the high-content steel slag as claimed in claim 1, is characterized in that: after the steel slag, the cement clinker and the blast furnace slag are crushed to 0.5-1 mm, the crushed materials are mixed with the fly ash and the desulfurized gypsum and are finely ground.
3. The method for preparing the light energy-saving building wall material by adopting the high-content steel slag as claimed in claim 1, is characterized in that: the specific surface area of the mixture after fine grinding is more than or equal to 500kg/m2。
4. The method for preparing the light energy-saving building wall material by adopting the high-content steel slag as claimed in claim 1, is characterized in that: CaSO in the desulfurized gypsum4·2H2The content of O is more than or equal to 80 percent.
5. The method for preparing the light energy-saving building wall material by adopting the high-content steel slag as claimed in claim 1, is characterized in that: the early strength grinding aid comprises (a) 60-75% of ester compounds by the total weight of the modified early strength grinding aid, (b) 5-15% of polyacrylic acid by the total weight of the modified early strength grinding aid, and (c) 10-35% of triethanolamine and acrylic acid monomers by the total weight of the modified early strength grinding aid.
6. The method for preparing the light energy-saving building wall material by adopting the high-content steel slag as claimed in claim 1, is characterized in that: the reinforcing fiber is plant fiber or glass fiber with the length of 4-6 mm, and is used when being mixed with the finely ground mixture, and the using amount of the reinforcing fiber is 0-2% of that of the inorganic solid raw material.
7. The method for preparing the light energy-saving building wall material by adopting the high-content steel slag as claimed in claim 1, is characterized in that: the foaming slurry is an aqueous solution of an FP-180 type animal protein foaming agent with the mass percentage concentration of 4-6%, and the average bubble particle size is 1-2 mm after foaming by a foaming device.
8. The method for preparing the light energy-saving building wall material by adopting the high-content steel slag as claimed in claim 1, is characterized in that: the foaming slurry is 0.02-0.05% of the inorganic solid raw material, and the water reducing agent is 0.6-1.0% of the inorganic solid raw material.
9. The method for preparing the light energy-saving building wall material by adopting the high-content steel slag as claimed in claim 1, is characterized in that: in the casting material forming process, after 1-2 cm of protective layers are respectively reserved on the upper surface and the lower surface in the thickness direction of the plate, reinforcing fiber mesh cloth is uniformly distributed in the thickness direction.
10. A light energy-saving building wall material is characterized in that: the light energy-saving building wall material is prepared by the method for preparing the light energy-saving building wall material by using the steel slag with high content according to any one of claims 1 to 9.
CN202110355427.3A 2021-04-01 2021-04-01 Method for preparing light energy-saving building wall material by adopting high-content steel slag Pending CN112919877A (en)

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CN115716727A (en) * 2022-11-01 2023-02-28 广东华欣环保科技有限公司 Light wall material and preparation method thereof
CN116462440A (en) * 2023-06-20 2023-07-21 石家庄铁道大学 Low-shrinkage industrial solid waste excitant and preparation method and application thereof

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Publication number Priority date Publication date Assignee Title
CN115716727A (en) * 2022-11-01 2023-02-28 广东华欣环保科技有限公司 Light wall material and preparation method thereof
CN115716727B (en) * 2022-11-01 2024-01-09 广东华欣环保科技有限公司 Light wall material and preparation method thereof
CN116462440A (en) * 2023-06-20 2023-07-21 石家庄铁道大学 Low-shrinkage industrial solid waste excitant and preparation method and application thereof
CN116462440B (en) * 2023-06-20 2023-09-01 石家庄铁道大学 Low-shrinkage industrial solid waste excitant and preparation method and application thereof

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