CN117253569A - Batching calculation method of all-solid waste cementing material - Google Patents
Batching calculation method of all-solid waste cementing material Download PDFInfo
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- 239000002910 solid waste Substances 0.000 title claims abstract description 73
- 239000000463 material Substances 0.000 title claims abstract description 70
- 238000004364 calculation method Methods 0.000 title claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 136
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 68
- 239000010440 gypsum Substances 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 10
- 239000004615 ingredient Substances 0.000 claims description 20
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 13
- 239000000843 powder Substances 0.000 claims description 11
- 239000010881 fly ash Substances 0.000 claims description 9
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000010606 normalization Methods 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000004836 empirical method Methods 0.000 abstract description 3
- 230000036571 hydration Effects 0.000 description 24
- 238000006703 hydration reaction Methods 0.000 description 24
- 239000000203 mixture Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 239000011575 calcium Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 230000018199 S phase Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 238000009614 chemical analysis method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 101150096839 Fcmr gene Proteins 0.000 description 1
- 206010017472 Fumbling Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16C—COMPUTATIONAL CHEMISTRY; CHEMOINFORMATICS; COMPUTATIONAL MATERIALS SCIENCE
- G16C60/00—Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention relates to the technical field of comprehensive utilization of solid wastes and building materials, and particularly discloses a batching calculation method of a full solid waste cementing material. According to the batching calculation method of the full solid waste cementing material, only S, ca and Al in raw steel slag, slag and desulfurized gypsum are detected in mass content respectively, as long as the formula (1) to formula (3) are met, detection results are directly brought into the formula (4) to formula (6) respectively, the pre-doping amount of the steel slag, slag and desulfurized gypsum can be obtained, and the optimal mass ratio of each raw material is obtained through normalization treatment. The invention has the advantages of simple, convenient, quick and accurate operation, reduced test workload, shortened or even avoided waiting time for test piece strength results, greatly improved design efficiency of the batching ratio and saved time cost. Meanwhile, the artificial error caused by an empirical method is effectively reduced, the production precision of the solid waste-based cementing material is improved, and the method is suitable for the requirements of mass production and markets.
Description
Technical Field
The invention relates to the technical field of comprehensive utilization of solid wastes and building materials, and particularly discloses a batching calculation method of a full solid waste cementing material.
Background
The raw materials of the all-solid waste cementing material mainly comprise solid wastes such as steel slag, desulfurized gypsum and the like, and are widely applied to the building material industry at present. The comprehensive utilization of the solid waste materials can effectively reduce the emission of carbon dioxide and other harmful gases in the cement production process, and meets the requirements of national policies and development targets; in most engineering construction, the full solid waste cementing material can completely replace the traditional cement, and the indexes such as durability and the like are even better than those of the traditional cement.
The all-solid waste cementing material does not contain clinker, has great difference with the traditional cement in the aspects of raw material composition and hydration mechanism, and cannot completely take care of the design method of the traditional cement for the design of ingredients of the all-solid waste cementing material. The existing batching method needs to be determined through fumbling by a large number of manual tests on the basis of application experience of traditional cement. According to the method, a large number of tests are needed, the cementing material obtained through the tests is required to be maintained to a specified age, the proper proportioning ratio can be determined after the performance is tested, time and labor are wasted, the success rate is low, and the obtained result is only the relatively optimal proportioning ratio. Most importantly, when the solid waste raw materials are changed, the steps of testing, curing, testing and the like are needed to be carried out again, so that the relatively optimal batching ratio can be determined, and the working efficiency is extremely low. With the use of more and more all solid waste cementing materials, development of a formulation design method specific to all solid waste cementing materials is needed.
Disclosure of Invention
Aiming at the problems, the invention provides a batching calculation method of the all-solid-waste cementing material, which takes the balance relation of the S phase, the Ca phase and the Al phase before and after hydration as a core key point, analyzes and researches hydration products of the all-solid-waste cementing material 56d with excellent comprehensive performance, reversely deduces the optimal mixing amount of each raw material component by combining the chemical substance composition condition of raw materials, establishes a calculation model of the batching ratio of the all-solid-waste cementing material, effectively overcomes the defects in the traditional raw material proportioning design method, and improves the comprehensive performance of the all-solid-waste cementing material.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the batching calculation method of the all-solid waste cementing material comprises the following steps:
step 1, toSO 3 CaO and Al 2 O 3 Measuring, namely respectively detecting the mass contents of S, ca and Al in steel slag, slag and desulfurized gypsum, wherein the steel slag, the slag and the desulfurized gypsum are active SO 3 The mass contents of (a) are respectively denoted as a 1 ，a 2 And a 3 The method comprises the steps of carrying out a first treatment on the surface of the The mass contents of active CaO in the steel slag, the slag and the desulfurized gypsum are respectively marked as b 1 ，b 2 And b 3 The method comprises the steps of carrying out a first treatment on the surface of the Active Al in the steel slag, the slag and the desulfurized gypsum 2 O 3 The mass contents of (c) are respectively denoted as c 1 ，c 2 And c 3 ；
If a is 1 ，a 2 ，a 3 ，b 1 ，b 2 ，b 3 ，c 1 ，c 2 And c 3 If the relation of (2) satisfies the formula (1) to (3), entering the step (2);
≥0（1）；
≥0（2）；
≥0（3）；
step 2, the a is carried out 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 Carrying out the following steps in the formulas (4) to (6), and solving to obtain the pre-doping amounts of the steel slag, the slag and the desulfurized gypsum respectively;
x·a 1 +y·a 2 +z·a 3 =0.079（4）；
x·b 1 +y·b 2 +z·b 3 =0.362（5）；
x·c 1 +y·c 2 +z·c 3 =0.178（6）；
wherein x represents the pre-doping amount of the steel slag; y represents the pre-doping amount of the slag; z represents the pre-doping amount of the desulfurized gypsum;
and step 3, normalizing the pre-doping amount to obtain the actual mass ratio of the steel slag, the slag and the desulfurized gypsum.
Compared with the prior art, the method for calculating the ingredients of the all-solid waste cementing material only needs to detect the mass contents of S, ca and Al in the raw steel slag, the slag and the desulfurized gypsum respectively (the detection results are respectively in SO) 3 CaO and Al 2 O 3 And (3) directly bringing the detection results into the formulas (4) to (6) as long as the formulas (1) to (3) are satisfied, solving to obtain the pre-doping amount of the steel slag, the slag and the desulfurized gypsum, and carrying out normalization treatment to obtain the actual mass ratio of each raw material. The batching calculation method of the all-solid-waste cementing material provided by the invention is simple, convenient, quick and accurate in operation, reduces the test workload, shortens and even avoids the time of waiting for the test piece strength result, greatly improves the batching ratio design efficiency, and saves the time cost. Meanwhile, the artificial error caused by an empirical method is effectively reduced, the production precision of the solid waste-based cementing material is improved, and the method is suitable for the requirements of mass production and markets.
Through se:Sub>A large number of experiments, the inventor analyzes hydration products of the all-solid waste cementing material with excellent performance by taking steel slag, slag and desulfurized gypsum as raw materials, and discovers that the hydration products of 56d are mainly AFt, C-A-S-H and CH. Wherein AFt represents ettringite, and the molecular formula is Ca 6 Al 2 S 3 O 18 ·32H 2 The mol content of O accounts for 15% -35% of the three hydration products; C-A-S-H represents hydrated calcium aluminosilicate, and the molecular formulse:Sub>A is Cse:Sub>A 4 Al 6 Si 10 O 32 ·15H 2 The molar content of O accounts for 50% -70% of the three hydration products; CH represents calcium hydroxide, and the molecular formula is Ca (OH) 2 The molar content of the three hydration products is 5% -15%. Since AFt, C-A-S-H and CH in the hydration product are derived from SO in the feedstock 3 CaO and Al 2 O 3 Thus, SO in the feed 3 CaO and Al 2 O 3 The mass of (C) should be not lower than the SO required for forming AFt, C-A-S-H and CH 3 CaO and Al 2 O 3 The invention takes the limit value, namely: s in AFt comes entirely from S phase in the feedstock(embodied as SO in chemical analysis) 3 ) Cse:Sub>A in AFt, C-A-S-H and CH is derived entirely from Cse:Sub>A phase in raw material (expressed as CaO in chemical analysis), and Al in AFt and C-A-S-H is derived entirely from Al phase in raw material (expressed as Al in chemical analysis) 2 O 3 ). From the relationship before and after hydration of the S phase, ca phase, and Al phase, sulfur balance equation (7), calcium balance equation (8), and aluminum balance equation (9) can be listed.
x·a 1 +y·a 2 +z·a 3 =ω 1 （7）
x·b 1 +y·b 2 +z·b 3 =ω 2 +ω 3 +ω 4 （8）
x·c 1 +y·c 2 +z·c 3 =ω 5 +ω 6 （9）
Wherein omega is 1 Representing the mass content of S in AFt accounting for three hydration products; omega 2 Representing the mass content of Ca in three hydration products in AFt; omega 3 Representing the mass content of Cse:Sub>A in the C-A-S-H in three hydration products; omega 4 Representing the mass content of Ca in CH accounting for three hydration products; omega 5 Representing the mass content of Al in AFt accounting for three hydration products; omega 6 The mass content of Al in the C-A-S-H in the three hydration products is shown.
In the present invention, when AFt is 30%, C-A-S-H is 60%, and CH is 10% in terms of molar content, the average molecular mass of the three hydration products is 1254X 0.3+1384X 0.6+74X 0.1=1214. Calculated omega 1 7.9%, omega 2 +ω 3 +ω 4 36.2%, omega 5 +ω 6 17.8%.
The invention provides a method for calculating ingredients of all-solid waste cementing materials, which is based on the chemical composition conditions of raw steel slag, slag or desulfurized gypsum and the proportion of different elements in hydration products of all-solid waste cementing materials 56d with excellent performance, and obtains each active phase SO capable of participating in the reaction through a chemical analysis means 3 CaO and Al 2 O 3 And calculating the composition conditions of the total solid waste cementing material according to the balance relation of the S phase, the Ca phase and the Al phase before and after hydration to obtain a batching ratio design model of the total solid waste cementing material. Example resultsThe 3d compressive strength of the all-solid-waste cementing material obtained by the burdening calculation method of the all-solid-waste cementing material can reach more than 18.0MPa, the 28d compressive strength can reach more than 40.8MPa, and the 56d compressive strength can reach more than 45.1MPa.
The chemical composition of the raw materials is limited because the chemical composition of the slag, slag or desulfurized gypsum, which are poor in quality, cannot meet the requirements of the formulas (4) to (6). Only whena 1 、a 2 、a 3 、b 1 、b 2 、b 3 、c 1 、c 2 Andc 3 the relation of (2) satisfies the formulas (1) to (3), and is applicable to the distribution ratio design model of the invention.
Preferably, the raw materials of the all-solid waste cementing material further comprise tailing micro powder, regenerated micro powder or fly ash, wherein the mass of the tailing micro powder, the regenerated micro powder or the fly ash accounts for less than 10% of the raw materials, and more preferably 0% -5%.
The raw materials of the all-solid-waste cementing material can comprise other solid-waste materials besides steel slag, slag and desulfurized gypsum, but the mass ratio of other solid-waste materials is controlled below 10%, so that the total mass of the steel slag, slag and desulfurized gypsum can be ensured to be more than 90% of the raw materials, and the all-solid-waste cementing material is still suitable for a batching ratio design model of the all-solid-waste cementing material, and the quality of the all-solid-waste cementing material can be ensured.
Preferably, the method for calculating the ingredients of the all-solid-waste cementing material further comprises a verification test:
and 4, grinding the steel slag, the slag and the desulfurized gypsum respectively, and adopting the actual mass proportion for proportioning, carrying out a mortar strength test, and testing the compressive strength.
Further preferably, after the grinding, the specific surface areas of the steel slag, the slag and the desulfurized gypsum are all more than or equal to 450kg/m 2 More preferably 450 to 550kg/m 2 。
The invention grinds the solid waste materials further, and can activate the steel slag and the slagAnd desulfurized gypsum to further increase active SO 3 CaO and Al 2 O 3 Is contained in the composition.
Further preferably, the specific surface area of the tailing micro powder, the regenerated micro powder or the fly ash is more than or equal to 450kg/m 2 More preferably 450 to 550kg/m 2 。
For example, the invention performs a sand strength test according to the method of national standard GB/T17671-2021.
Further preferably, the actual mass ratio is considered to be satisfactory if the 3d compressive strength of the bonded sand is 8.0MPa or more, the 28d compressive strength is 30.0MPa or more, and the 56d compressive strength is 42.5MPa or more.
In the requirements of the existing standard of the full solid waste cementing material, the 3d compressive strength is more than or equal to 8.0MPa, the 28d compressive strength is more than or equal to 30.0MPa, and the 56d compressive strength is more than or equal to 42.5MPa. Therefore, in the invention, the 3d qualified compressive strength is 8.0MPa, the 28d qualified compressive strength is 30.0MPa, and the 56d qualified compressive strength is 42.5MPa.
Drawings
FIG. 1 is a flow chart of a method for calculating ingredients of the all-solid waste cementing material;
fig. 2 is an SEM image of the hydration 56d of the all solid waste cementitious material of the present invention, with steel slag, slag and desulfurized gypsum as raw materials.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the invention provides a method for calculating ingredients of a full solid waste cementing material, which comprises the following steps:
step 1, using SO 3 CaO and Al 2 O 3 Measuring, namely respectively detecting the mass contents of S, ca and Al in the steel slag, the slag and the desulfurized gypsum; active SO in the steel slag, the slag and the desulfurized gypsum 3 The mass contents of (a) are respectively denoted as a 1 ，a 2 And a 3 The method comprises the steps of carrying out a first treatment on the surface of the The steel slag, the slag and the deslaggingThe mass content of active CaO in the sulfur gypsum is respectively denoted as b 1 ，b 2 And b 3 The method comprises the steps of carrying out a first treatment on the surface of the Active Al in the steel slag, the slag and the desulfurized gypsum 2 O 3 The mass contents of (c) are respectively denoted as c 1 ，c 2 And c 3 ；
If a is 1 ，a 2 ，a 3 ，b 1 ，b 2 ，b 3 ，c 1 ，c 2 And c 3 If the relation of (2) satisfies the formula (1) to (3), entering the step (2);
≥0（1）；
≥0（2）；
≥0（3）；
step 2, the a is carried out 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 Carrying out the following steps in the formulas (4) to (6), and solving to obtain the pre-doping amounts of the steel slag, the slag and the desulfurized gypsum respectively;
x·a 1 +y·a 2 +z·a 3 =0.079（4）；
x·b 1 +y·b 2 +z·b 3 =0.362（5）；
x·c 1 +y·c 2 +z·c 3 =0.178（6）；
wherein x represents the pre-doping amount of the steel slag; y represents the pre-doping amount of the slag; z represents the pre-doping amount of the desulfurized gypsum;
and step 3, normalizing the pre-doping amount to obtain the actual mass ratio of the steel slag, the slag and the desulfurized gypsum.
Through se:Sub>A large number of experiments, 56d hydration products (shown in figure 2) of the full solid waste cementing material with excellent performance, which takes steel slag, slag and desulfurized gypsum as raw materials, are analyzed, wherein the AFt accounts for 15% -35% and the C-A-S-H accounts for 50% -70% in the 56d hydration products according to the molar contents of the three hydration products; CH accounts for 5% -15%. When AFt is 30%, C-A-S-H is 60%, and CH is 10%, the comprehensive performance is optimal.
According to the invention, through reverse thinking, the hydration products of the all-solid waste cementing material with excellent compressive strength and other comprehensive properties are analyzed and researched, and the equation relation is determined by combining the chemical substance composition conditions of the raw materials and taking a limit value; and reversely deducing the optimal blending amount of each raw material, and establishing a calculation model of the proportion of the all-solid-waste cementing material. The method for calculating the ingredients of the all-solid-waste cementing material provided by the invention can determine the accuracy of the ingredients ratio by only carrying out one verification test after calculating the optimal ingredients ratio aiming at different steel slag, slag and desulfurized gypsum raw materials, overcomes the defects in the traditional ingredients ratio design method, and ensures the quality of the all-solid-waste cementing material.
In order to better illustrate the present invention, the following examples are provided for further illustration.
Example 1
The embodiment provides a batching calculation method of a full solid waste cementing material, wherein raw materials of the full solid waste cementing material are steel slag, slag and desulfurized gypsum, and the method comprises the following steps:
s1, by chemical analysis method, using SO 3 CaO and Al 2 O 3 And (5) respectively detecting the mass contents of S, ca and Al elements in the steel slag, the slag and the desulfurized gypsum. Wherein, the activity SO in the steel slag 3 Mass content a of (2) 1 Mass content b of active CaO in steel slag =2.3% 1 =43.9% active Al in steel slag 2 O 3 Mass content c of (2) 1 =3.5%; reactive SO in slag 3 Mass content a of (2) 2 Mass content b of active CaO in slag =3.2% 2 Active Al in slag=41.4 2 O 3 Mass content c of (2) 2 =32.0%; active SO in desulfurized gypsum 3 Mass content a of (2) 3 Mass content b of active CaO in desulfurized gypsum =38.5% 3 =48.2%, and active Al in desulphurized gypsum 2 O 3 Mass content c of (2) 3 =8.9%。
Through inspection, the a 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 The relation of (2) satisfies the formulas (1) to (3).
S2, the a is carried out 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 And (3) carrying out the following steps in the formula (10) to the formula (12), solving to obtain the pre-doping amount x=0.192 of the steel slag, the pre-doping amount y=0.493 of the slag and the pre-doping amount z=0.153 of the desulfurized gypsum.
0.023x+0.032y+0.385z=0.079（10）
0.439x+0.414y+0.482z=0.362（11）
0.035x+0.320y+0.089z=0.178（12）
S3, normalizing the X, y and z to obtain the actual mass ratio X=of the steel slagX 100% = 22.9%, actual mass ratio y= =>X 100% = 58.8%, actual mass ratio z= =%>×100%=18.3%。
S4, grinding the steel slag, the slag and the desulfurized gypsum to the specific surface area of 450kg/m respectively 2 The actual mass ratio is adopted for proportioning, and the mortar strength test is carried out according to the method of national standard GB/T17671-2021, so as to test the compressive strength.
The 3d compressive strength of the all-solid waste cementing material obtained by adopting the burdening calculation method of the embodiment is 19.2MPa, the 28d compressive strength is 41.7MPa, and the 56d compressive strength is 46.1MPa.
Example 2
The embodiment provides a batching calculation method of a full solid waste cementing material, wherein raw materials of the full solid waste cementing material are steel slag, slag and desulfurized gypsum, and the method comprises the following steps:
s1, by chemical analysis method, using SO 3 CaO and Al 2 O 3 Meter for respectively detecting steel slag, slag and desulfurizationS, ca and Al elements in gypsum. Wherein, the activity SO in the steel slag 3 Mass content a of (2) 1 Mass content b of active CaO in steel slag =4.2% 1 =32.1% active Al in steel slag 2 O 3 Mass content c of (2) 1 =3.4%; reactive SO in slag 3 Mass content a of (2) 2 Mass content b of active CaO in slag =1.2 2 Active Al in slag =42.7 = 2 O 3 Mass content c of (2) 2 =32.9%; active SO in desulfurized gypsum 3 Mass content a of (2) 3 Mass content b of active CaO in desulfurized gypsum =35.7% 3 =46.4% and active Al in desulfurized gypsum 2 O 3 Mass content c of (2) 3 =3.7%。
Through inspection, the a 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 The relation of (2) satisfies the formulas (1) to (3).
S2, the a is carried out 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 And (3) carrying out the following steps in the formula (13) to the formula (15), solving to obtain the pre-doping amount x=0.201 of the steel slag, the pre-doping amount y=0.500 of the slag and the pre-doping amount z=0.180 of the desulfurized gypsum.
0.042x+0.012y+0.357z=0.079（13）
0.321x+0.427y+0.464z=0.362（14）
0.034x+0.329y+0.037z=0.178（15）
S3, normalizing the X, y and z to obtain the actual mass ratio X=of the steel slagX 100% = 22.8%, actual mass ratio y= =>X 100% = 57.8%, actual mass ratio z= =%>×100%=20.4%。
S4, grinding the steel slag, the slag and the desulfurized gypsum respectively to the specific surface area of 470kg/m 2 The actual mass is adoptedAnd (3) proportioning, and performing a mortar strength test according to the method of the national standard GB/T17671-2021 to test the compressive strength.
The 3d compressive strength of the all-solid waste cementing material obtained by adopting the burdening calculation method of the embodiment is 20.8MPa, the 28d compressive strength is 44.6MPa, and the 56d compressive strength is 49.3MPa.
Example 3
The embodiment provides a method for calculating ingredients of a full solid waste cementing material, wherein raw materials of the full solid waste cementing material are steel slag, desulfurized gypsum and fly ash, and the method comprises the following steps:
s1, by chemical analysis method, using SO 3 CaO and Al 2 O 3 And (5) respectively detecting the mass contents of S, ca and Al elements in the steel slag, the slag and the desulfurized gypsum. Wherein, the activity SO in the steel slag 3 Mass content a of (2) 1 Mass content b of active CaO in steel slag =3.2% 1 Active Al in steel slag =34.2 = 2 O 3 Mass content c of (2) 1 =5.5%; reactive SO in slag 3 Mass content a of (2) 2 Mass content b of active CaO in slag =2.5% 2 Active Al in slag =4.1 = 2 O 3 Mass content c of (2) 2 =31.9%; active SO in desulfurized gypsum 3 Mass content a of (2) 3 Mass content b of active CaO in desulfurized gypsum =38.8% 3 =47.1%, and active Al in desulfurized gypsum 2 O 3 Mass content c of (2) 3 =5.0%。
Through inspection, the a 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 The relation of (2) satisfies the formulas (1) to (3).
S2, the a is carried out 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 And (3) carrying out the following steps in the formula (16) to the formula (18), solving to obtain the pre-doping amount x=0.266 of the steel slag, the pre-doping amount y=0.489 of the slag and the pre-doping amount z=0.150 of the desulfurized gypsum.
0.032x+0.025y+0.388z=0.079（16）
0.342x+0.041y+0.471z=0.362（17）
0.055x+0.319y+0.050z=0.178（18）
S3, setting the actual mass ratio m of the fly ash to be 4%, and carrying out normalization treatment on X, y, z and m to obtain the actual mass ratio X=of the steel slagX 96% = 28.2%, actual mass ratio Y of slag=X 96% = 51.9%, actual mass ratio z= =%>×96%=15.9%。
S4, grinding the steel slag, the desulfurized gypsum and the fly ash to the specific surface area of 450kg/m respectively 2 The actual mass ratio is adopted for proportioning, and the mortar strength test is carried out according to the method of national standard GB/T17671-2021, so as to test the compressive strength.
The 3d compressive strength of the all-solid waste cementing material obtained by adopting the burdening calculation method of the embodiment is 18.4MPa, the 28d compressive strength is 41.4MPa, and the 56d compressive strength is 45.7MPa.
Example 4
The embodiment provides a method for calculating ingredients of a full solid waste cementing material, wherein raw materials of the full solid waste cementing material are steel slag, desulfurized gypsum and regenerated micro powder, and the method comprises the following steps:
s1, by chemical analysis method, using SO 3 CaO and Al 2 O 3 And (5) respectively detecting the mass contents of S, ca and Al elements in the steel slag, the slag and the desulfurized gypsum. Wherein, the activity SO in the steel slag 3 Mass content a of (2) 1 Mass content b of active CaO in steel slag =1.9% 1 =30.8% active Al in steel slag 2 O 3 Mass content c of (2) 1 =3.2%; reactive SO in slag 3 Mass content a of (2) 2 Mass content b of active CaO in slag =1.7% 2 Active Al in slag=41.4 2 O 3 Mass content c of (2) 2 =31.5%; active SO in desulfurized gypsum 3 Mass content a of (2) 3 Mass content b of active CaO in desulfurized gypsum =37.1% 3 =48.2%，And active Al in desulfurized gypsum 2 O 3 Mass content c of (2) 3 =13.6%。
Through inspection, the a 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 The relation of (2) satisfies the formulas (1) to (3).
S2, the a is carried out 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 And (3) carrying out the following steps in the formula (19) to the formula (21), solving to obtain the pre-doping amount x=0.279 of the steel slag, the pre-doping amount y=0.460 of the slag and the pre-doping amount z=0.178 of the desulfurized gypsum.
0.019x+0.017y+0.371z=0.079（19）
0.308x+0.414y+0.482z=0.362（20）
0.032x+0.315y+0.136z=0.178（21）
S3, setting the actual mass ratio n of the regenerated micro powder to 7%, and carrying out normalization treatment on X, y, z and n to obtain the actual mass ratio X=of the steel slagX 93% = 28.3%, actual mass ratio Y of slag=X 93% = 46.7%, actual mass ratio z= =%>×93%=18.0%。
S4, grinding the steel slag, the desulfurized gypsum and the regenerated micro powder respectively to the specific surface area of 450kg/m 2 The actual mass ratio is adopted for proportioning, and the mortar strength test is carried out according to the method of national standard GB/T17671-2021, so as to test the compressive strength.
The 3d compressive strength of the all-solid waste cementing material obtained by adopting the burdening calculation method of the embodiment is 18.0MPa, the 28d compressive strength is 40.8MPa, and the 56d compressive strength is 45.1MPa.
Comparative example 1
The method is characterized in that the full-solid waste cementing material (raw materials are 32% steel slag, 46% slag and 22% desulfurized gypsum) of a certain company in Tangshan is used for preparing the sand according to the method of national standard GB/T17671-2021, and the 3d compressive strength is 17.4MPa,28d compressive strength is 39.8MPa and 56d compressive strength is 43.8MPa.
As can be seen from the test results of the embodiments 1-4 and the comparative examples, the method for calculating the ingredients of the all-solid-waste cementing material provided by the invention can be used for rapidly and accurately calculating the optimal ingredient ratio according to different raw materials, shortens and even eliminates the time for waiting for the strength result of a test piece, effectively reduces errors caused by an empirical method, improves the production precision of the all-solid-waste cementing material, and is suitable for the requirements of mass production and market.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The batching calculation method of the all-solid waste cementing material is characterized by comprising the following steps of:
step 1, using SO 3 CaO and Al 2 O 3 Measuring, namely respectively detecting the mass contents of S, ca and Al in the steel slag, the slag and the desulfurized gypsum; active SO in the steel slag, the slag and the desulfurized gypsum 3 The mass contents of (a) are respectively denoted as a 1 ，a 2 And a 3 The method comprises the steps of carrying out a first treatment on the surface of the The mass contents of active CaO in the steel slag, the slag and the desulfurized gypsum are respectively marked as b 1 ，b 2 And b 3 The method comprises the steps of carrying out a first treatment on the surface of the Active Al in the steel slag, the slag and the desulfurized gypsum 2 O 3 The mass contents of (c) are respectively denoted as c 1 ，c 2 And c 3 ；
If a is 1 ，a 2 ，a 3 ，b 1 ，b 2 ，b 3 ，c 1 ，c 2 And c 3 If the relation of (2) satisfies the formula (1) to (3), entering the step (2);
≥0（1）；
≥0（2）；
≥0（3）；
step 2, the a is carried out 1 ~a 3 、b 1 ~b 3 C 1 ~c 3 Carrying out the following steps in the formulas (4) to (6), and solving to obtain the pre-doping amounts of the steel slag, the slag and the desulfurized gypsum respectively;
x·a 1 +y·a 2 +z·a 3 =0.079（4）；
x·b 1 +y·b 2 +z·b 3 =0.362（5）；
x·c 1 +y·c 2 +z·c 3 =0.178（6）；
wherein x represents the pre-doping amount of the steel slag; y represents the pre-doping amount of the slag; z represents the pre-doping amount of the desulfurized gypsum;
and step 3, normalizing the pre-doping amount to obtain the actual mass ratio of the steel slag, the slag and the desulfurized gypsum.
2. The method for calculating the ingredients of the all-solid-waste cementing material according to claim 1, wherein the raw materials of the all-solid-waste cementing material further comprise tailing micropowder, regenerated micropowder or fly ash, and the mass of the tailing micropowder, the regenerated micropowder or the fly ash is less than 10% of the raw materials.
3. The method for calculating the ingredients of the all-solid-waste cementing material according to claim 1, wherein the method for calculating the ingredients of the all-solid-waste cementing material further comprises a verification test:
and 4, grinding the steel slag, the slag and the desulfurized gypsum respectively, and adopting the actual mass proportion for proportioning, carrying out a mortar strength test, and testing the compressive strength.
4. The method for calculating ingredients of all-solid-waste cementing material according to claim 3, wherein after the grinding, the specific surface areas of the steel slag, the slag and the desulfurized gypsum are all more than or equal to 450kg/m 2 。
5. The method for calculating the ingredients of the all-solid-waste cementing material according to claim 3, wherein the actual mass ratio is considered to be satisfactory if the 3d compressive strength of the cemented sand is 8.0MPa or more, the 28d compressive strength is 30.0MPa or more, and the 56d compressive strength is 42.5MPa or more.
6. The method for calculating ingredients of all-solid-waste cementing material according to claim 2, wherein the specific surface area of the tailing micro powder, the regenerated micro powder or the fly ash is more than or equal to 450kg/m 2 。
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