CN110763540A - Method for detecting activity index of waste ceramic polishing slurry - Google Patents
Method for detecting activity index of waste ceramic polishing slurry Download PDFInfo
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- CN110763540A CN110763540A CN201910959448.9A CN201910959448A CN110763540A CN 110763540 A CN110763540 A CN 110763540A CN 201910959448 A CN201910959448 A CN 201910959448A CN 110763540 A CN110763540 A CN 110763540A
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- 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
- G01N1/36—Embedding or analogous mounting of samples
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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
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- 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
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- 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
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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
- 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
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- 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
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- 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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- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a method for detecting an activity index of waste ceramic polishing sludge slurry, which comprises the following steps: preparing a tested mortar test piece and a contrast mortar test piece; the preparation raw materials of the tested mortar test piece contain waste ceramic polishing slurry and first cement, the preparation raw materials of the comparative mortar test piece contain second cement, the sum of the solid weight of the waste ceramic polishing slurry and the weight of the first cement is equal to the weight of the second cement, and the water-cement ratio and the sand-cement ratio are respectively equal; maintaining the tested mortar test piece and the comparative mortar test piece, wherein the maintaining comprises the steps of removing a mold of the prepared and molded test piece, and then sequentially maintaining a heating stage, a constant temperature stage and a cooling stage; detecting the compressive strength of the tested mortar test piece and the comparative mortar test piece after the curing treatment to respectively obtain a first compressive strength value and a second compressive strength value; and calculating the ratio of the first compressive strength value to the second compressive strength value to obtain the activity index.
Description
Technical Field
The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a method for detecting an activity index of waste ceramic polishing sludge slurry.
Background
China is a big country for producing and consuming building ceramics. According to literature statistics, the ceramic polishing waste is produced by 1000 ten thousand tons every year in China. The solid waste with large amount has great harm to the environment and people, so the method has important significance for the research of recycling the ceramic waste. At present, ceramic waste is used for producing porous ceramic, and is added into a formula, but the treatment method has the disadvantages of high energy consumption, high cost, small yield and limited treatment capacity, and is not suitable for popularization and reference. The Wandongmei and Penggu utilize ceramic waste to develop solid concrete materials, but the method needs more high-strength adhesives and has more complex forming and is not suitable for wide application. In foreign countries, more than 40% of the ceramic waste can be recycled, and the rest can be prepared into ceramic waste powder to be supplied to other usable factories. The most important method of enterprises in China is landfill, a large amount of accumulated ceramic waste occupies the land, and seriously pollutes water, air and soil environments which human beings rely on for survival, so that the contradiction with ecological environment is more and more sharp, and a more reasonable and effective treatment method is urgently sought.
The study of the Shizheng and the like shows that: the addition of 5-10% of waste ceramic polishing sludge can improve the working performance of concrete, improve the compressive strength of concrete at each age and obviously improve the durability of concrete. However, when the amount of the ceramic polishing sludge exceeds 20%, the mechanical property and durability of the concrete are greatly reduced. The doctor's paper of doctor gazan gazang of the university of southern China, "study on characteristics and comprehensive utilization of ceramic polishing sludge" (2008) discloses that the polishing sludge has certain volcanic ash activity, the cement mortar strength activity index of the polishing sludge can reach 84% under normal temperature conditions, and the polishing sludge has the potential of being used as an auxiliary cementing material.
When the waste ceramic polishing slurry is used for an auxiliary cementing material, the activity index of the waste ceramic polishing slurry needs to be tested, the waste ceramic polishing slurry is more favorable for exciting the activity of the waste ceramic polishing slurry in a high-temperature environment, and the activity indexes of fly ash and slag powder for concrete are maintained in a normal-temperature environment, so the method for testing the activity indexes of the fly ash and the slag powder is not suitable for the waste ceramic polishing slurry, and at present, no method for detecting the activity index of the waste ceramic polishing slurry for concrete exists.
Disclosure of Invention
The invention aims to provide a method for detecting an activity index of waste ceramic polishing slurry, and aims to solve the technical problem that the existing activity index detection method cannot objectively reflect the activity index of the waste ceramic polishing slurry.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for detecting an activity index of waste ceramic polishing sludge slurry, which comprises the following steps:
preparing a tested mortar test piece and a contrast mortar test piece; the preparation raw materials of the checked mortar test piece contain waste ceramic polishing silt slurry and first cement, the preparation raw materials of the comparison mortar test piece contain second cement, the sum of the solid weight of the waste ceramic polishing silt slurry and the weight of the first cement is equal to the weight of the second cement, and the water-cement ratio and the sand-cement ratio in the preparation raw materials of the checked mortar test piece are respectively equal to the water-cement ratio and the sand-cement ratio in the preparation raw materials of the comparison mortar test piece;
maintaining the tested mortar test piece and the comparative mortar test piece; the maintenance treatment comprises the steps of removing a mold of a prepared and molded test piece, and then sequentially maintaining a heating stage, a constant temperature stage and a cooling stage;
detecting the compressive strength of the tested mortar test piece and the comparative mortar test piece after the maintenance treatment to respectively obtain a first compressive strength value and a second compressive strength value; and calculating the ratio of the first compressive strength value to the second compressive strength value to obtain the activity index of the waste ceramic polishing slurry.
The method for detecting the activity index of the waste ceramic polishing silt slurry provided by the invention has the advantages that the raw material water-to-gel ratio and the sand-to-gel ratio are the same when the tested mortar test piece and the comparison mortar test piece are prepared, meanwhile, the sum of the weight of the solid of the waste ceramic polishing silt slurry in the preparation raw materials of the tested mortar test piece and the weight of the first cement is equal to the weight of the second cement in the preparation raw materials of the comparison mortar test piece (i.e. the waste ceramic polishing silt slurry is converted into the solid to replace the cement), so that the tested mortar test piece and the comparison mortar test piece can be better compared, but also can better stimulate the activity of the waste ceramic polishing sludge slurry through the same maintenance treatment of temperature rise, constant temperature and temperature drop, the activity index obtained by detection can better evaluate the waste ceramic polishing slurry, and lays a foundation for the wide use of the waste ceramic polishing slurry. In a word, the detection method objectively evaluates the activity index of the waste ceramic polishing slurry, and can provide a basis for the application of the waste ceramic polishing slurry as an auxiliary cementing material in concrete, so that the utilization rate of the waste ceramic polishing slurry is increased, the pollution of the waste ceramic polishing slurry to the environment is reduced, and better environmental and economic benefits are achieved.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The embodiment of the invention provides a method for detecting an activity index of waste ceramic polishing sludge slurry, which comprises the following steps:
s01: preparing a tested mortar test piece and a contrast mortar test piece; the preparation raw materials of the checked mortar test piece contain waste ceramic polishing silt slurry and first cement, the preparation raw materials of the comparison mortar test piece contain second cement, the sum of the solid weight of the waste ceramic polishing silt slurry and the weight of the first cement is equal to the weight of the second cement, and the water-cement ratio and the sand-cement ratio in the preparation raw materials of the checked mortar test piece are respectively equal to the water-cement ratio and the sand-cement ratio in the preparation raw materials of the comparison mortar test piece;
s02: maintaining the tested mortar test piece and the comparative mortar test piece; the maintenance treatment comprises the steps of removing a mold of a prepared and molded test piece, and then sequentially maintaining a heating stage, a constant temperature stage and a cooling stage;
s03: detecting the compressive strength of the tested mortar test piece and the comparative mortar test piece after the maintenance treatment to respectively obtain a first compressive strength value and a second compressive strength value; and calculating the ratio of the first compressive strength value to the second compressive strength value to obtain the activity index of the waste ceramic polishing slurry.
The method for detecting the activity index of the waste ceramic polishing silt slurry provided by the embodiment of the invention has the advantages that the raw material water-to-rubber ratio and the sand-to-rubber ratio are the same when the tested mortar test piece and the comparative mortar test piece are prepared, meanwhile, the sum of the weight of the solid of the waste ceramic polishing silt slurry in the preparation raw materials of the tested mortar test piece and the weight of the first cement is equal to the weight of the second cement in the preparation raw materials of the comparison mortar test piece (i.e. the waste ceramic polishing silt slurry is converted into the solid to replace the cement), so that the tested mortar test piece and the comparison mortar test piece can be better compared, but also can better stimulate the activity of the waste ceramic polishing sludge slurry through the same maintenance treatment of temperature rise, constant temperature and temperature drop, the activity index obtained by detection can better evaluate the waste ceramic polishing slurry, and lays a foundation for the wide use of the waste ceramic polishing slurry. In a word, the detection method objectively evaluates the activity index of the waste ceramic polishing slurry, and can provide a basis for the application of the waste ceramic polishing slurry as an auxiliary cementing material in concrete, so that the utilization rate of the waste ceramic polishing slurry is increased, the pollution of the waste ceramic polishing slurry to the environment is reduced, and better environmental and economic benefits are achieved.
The activity index is the ratio of the compressive strength of the tested mortar test piece and the compressive strength of the standard mortar test piece (namely the comparative mortar test piece) which are cured to the same specified age under the same condition. In the embodiment of the invention, the compressive strength of the tested mortar test piece and the comparative mortar test piece after maintenance treatment is detected to respectively obtain a first compressive strength value and a second compressive strength value; and calculating the ratio of the first compressive strength value to the second compressive strength value multiplied by 100 percent to obtain the activity index of the waste ceramic polishing slurry.
The embodiment of the invention provides a method for detecting an activity index of waste ceramic polishing slurry for concrete, which is characterized in that when the activity index of the waste ceramic slurry is detected, a thermal curing mode (namely curing in a heating stage, a constant temperature stage and a cooling stage is carried out in sequence) is adopted, so that the activity index of the waste ceramic slurry can be reasonably evaluated, the establishment of relevant specifications of the waste ceramic slurry and the popularization and application of the waste ceramic slurry are facilitated, and a foundation is laid for the establishment of application technical specifications of the waste ceramic slurry.
The water-cement ratio refers to the ratio of the water consumption of concrete to the consumption of cementing materials (such as cement and other setting materials); the sand-cement ratio refers to the ratio of the sand usage of concrete to the cement usage (such as cement and other setting materials). In one embodiment, the water-to-glue ratio of the raw materials for preparing the tested mortar test piece is 0.3, the sand-to-glue ratio is 3, and the water-to-glue ratio of the raw materials for preparing the comparative mortar test piece is 0.3, and the sand-to-glue ratio is 3. The sand-cement ratio is 3, meets the parameters of manufacturing a sand-cement test strip for detecting the compressive strength of cement according to the national standard, and the water-cement ratio is set to be 0.3, is closer to the actual water-cement ratio of concrete, and can objectively evaluate the activity index of the waste ceramic polishing silt slurry.
In one embodiment, the tested mortar test piece has a mortar fluidity of 200 + -10 mm in the raw material, and the comparative mortar test piece has a mortar fluidity of 200 + -10 mm in the raw material. And adjusting the mixing amount of the water reducing agent to enable the fluidity of the mortar to reach 200 +/-10 mm, forming by using a compaction table to complete the manufacture of the tested mortar test piece and the comparative mortar test piece, and maintaining.
In one embodiment, the concentration of solids in the spent ceramic polishing slurry is 40-50%. When the concentration of the waste ceramic polishing silt slurry is 40-50%, the performance is stable, and when the tested mortar is manufactured, the use amount of the waste ceramic polishing silt slurry is calculated according to the mass of the cement solid which replaces 10%.
In one embodiment, the ratio of the weight of the solids in the waste ceramic polishing slurry to the weight of the first cement is 1:9, i.e., the waste ceramic polishing slurry used for the tested mortar test piece is converted into solids to replace 10% of the cement. Along with the increase of the dosage of the waste ceramic sludge slurry material, the compressive strength of the mortar test piece is gradually reduced; the waste ceramic sludge slurry is converted into solid which replaces 10 percent of cement in concrete, the strength can reach the cement without the waste ceramic sludge slurry, if the waste ceramic sludge slurry replaces the cement, the strength of the concrete can be reduced, so that the replacement of 10 percent of cement is the most objective evaluation of the activity index of the waste ceramic sludge slurry.
In one embodiment, the temperature rise speed of the temperature rise stage is less than or equal to 15 ℃/h, the temperature drop speed of the temperature drop stage is less than or equal to 15 ℃/h, and the temperature range of the constant temperature stage is 85 ℃ +/-5 ℃. Further, the time of the constant temperature stage is 48 h. The temperature rise stage is used for gradually rising the temperature of the test piece from room temperature to 85 ℃, and the temperature reduction stage is used for cooling the test piece from 85 ℃ to room temperature, so that the compression strength test is conveniently carried out; high temperature curing (constant temperature stage) can accelerate hydration reaction. In one embodiment, the environmental temperature for testing the compressive strength of the tested mortar test piece and the comparative mortar test piece after the curing treatment is 20-25 ℃.
In one embodiment, in the step of curing, the molded test piece is cured in a standard curing room for 24 hours before being demoulded. The standard curing room is a room for storing the concrete test piece, wherein the temperature is 20 +/-2 ℃, and the humidity is more than 95%.
The invention is described in further detail with reference to a part of the test results, which are described in detail below with reference to specific examples.
Example 1
A method for detecting the activity index of waste ceramic polishing slurry for concrete comprises the following steps:
(1) preparing a contrast mortar test piece and a checked mortar test piece:
the raw materials of the contrast mortar test piece comprise the following materials in parts by weight:
450 parts of cement;
1350 parts of standard sand;
1.2 parts of a water reducing agent;
135 parts of water;
the contrast mortar test piece is prepared according to a cement mortar strength test method (GB/T17671-1999 cement mortar strength test method), the fluidity of the tested mortar reaches 200 +/-10 mm, and the manufacture of the contrast mortar test piece is completed by molding with a compaction table.
The raw materials of the checked mortar test piece comprise the following materials in parts:
405 parts of cement;
1350 parts of standard sand;
1.3 parts of a water reducing agent;
90 parts of waste ceramic polishing slurry with the concentration of 50 percent;
90 parts of water;
the test mortar test piece is prepared according to a cement mortar strength test method (GB/T17671-1999 cement mortar strength test method), the fluidity of the test mortar reaches 200 +/-10 mm, and the test mortar test piece is manufactured by molding with a compaction table.
(2) Maintaining the contrast mortar test piece and the checked mortar test piece:
the test piece maintenance mode is that the molded contrast mortar test piece and the tested mortar test piece are placed in a standard curing room and cured for 24 hours, then the mold is removed, the test piece is moved into a steam curing box for high-temperature curing after the mold is removed, the high-temperature curing process is divided into three stages of temperature rise, constant temperature and temperature reduction, the temperature rise speed is not more than 15 ℃/h, and the temperature reduction speed is not more than 15 ℃/h. The constant temperature is controlled to be 85 +/-5 ℃, and the constant temperature maintenance is carried out for 48 hours.
(3) And when the temperature of the test strip is reduced to room temperature (20-25 ℃), respectively measuring the compressive strength of the contrast mortar test piece and the tested sample mortar test piece, wherein the compressive strength of the contrast mortar test piece is 52.6MPa, the compressive strength of the tested mortar test piece is 46.3MPa, and the activity index of the waste ceramic sludge is 88 percent by calculation.
Comparative example 1
The procedure was as in example 1 except that the maintenance methods of the comparative mortar test piece and the tested mortar test piece were different. In this comparative example, the maintenance mode of contrast mortar test piece and examined mortar test piece does: and (3) placing the formed contrast mortar test piece and the detected mortar test piece into a standard curing chamber, curing for 24h, then removing the mold, placing the test piece after the mold is removed into the standard curing chamber, curing for 27d, then respectively determining the compressive strength of the contrast mortar test piece and the detected mortar test piece, wherein the compressive strength of the contrast mortar test piece is 52.9MPa, the compressive strength of the detected mortar test piece is 42.3MPa, and the activity index of the waste ceramic sludge is 80% by calculation.
Comparative example 2
A method for detecting the activity index of waste ceramic polishing slurry for concrete comprises the following steps:
(1) a comparative C60 test piece and a test piece subject to C60 were prepared, respectively.
The raw materials of the comparative C60 test piece comprise the following materials in parts by weight:
395 parts of cement;
693 parts of river sand;
1140 portions of crushed stones with the diameter of 5-20 mm;
12 parts of a water reducing agent;
142 parts of water;
and (3) putting the cement and the river sand with the weight into a stirrer, stirring for 1-2 minutes, putting the water and the water reducing agent with the weight into the stirrer, stirring for 1-2 minutes, putting the crushed stone with the weight into the stirrer, stirring for 1-2 parts, obtaining the comparative C60 concrete, testing the slump of the concrete to be 180mm, and preparing the 100 x 100 compression-resistant test block.
The raw materials of the tested C60 test piece comprise the following materials in parts by weight:
355.5 parts of cement;
79 parts of waste ceramic polishing slurry with the concentration of 50 percent;
693 parts of river sand;
1140 portions of crushed stones with the diameter of 5-20 mm;
13 parts of a water reducing agent;
102.5 parts of water;
and putting the cement and river sand with the weight into a stirrer to be stirred for 1-2 minutes, putting the waste ceramic polishing sludge slurry, water and a water reducing agent with the weight into the stirrer to be stirred for 1-2 minutes, putting the crushed stone with the weight into the stirrer to be stirred for 1-2 parts to obtain the tested C60 concrete, wherein the test slump is 185mm, and manufacturing a 100 x 100 compression-resistant test block.
(2) And (3) curing the comparative C60 test piece and the tested C60 test piece: the C60 test piece maintenance mode is that the molded comparative C60 test piece and the tested C60 test piece are placed in a standard maintenance chamber for maintenance for 24 hours and then are demoulded, the test piece after demould is moved into a steam-curing box for high-temperature maintenance, the high-temperature maintenance process is divided into three stages of temperature rise, constant temperature and temperature reduction, the temperature rise speed is not more than 15 ℃/h, and the temperature reduction speed is not more than 15 ℃/h. The constant temperature is controlled to be 85 +/-5 ℃, and the constant temperature maintenance is carried out for 48 hours.
(3) When the temperature of the test strip is reduced to room temperature (20-25 ℃), respectively measuring the compressive strength of a comparative C60 test piece and a tested sample C60 test piece, wherein the compressive strength of the comparative C60 test piece is 70.6MPa, the compressive strength of the tested C60 test piece is 66.4MPa, and the activity index of the waste ceramic sludge is 94.1 percent by calculation.
Comparative example 3
The curing method was the same as that of comparative example 2 except that the comparative C60 test piece and the test C60 test piece were cured in different manners. In the comparative example, the maintenance mode of the C60 test piece is that the formed comparative C60 test piece and the formed test piece for detecting C60 are placed in a standard curing chamber and cured for 24 hours, then the mold is removed, the test piece is placed in the standard curing chamber and cured for 27 days after the mold is removed, then the compressive strength of the comparative C60 test piece and the test piece for detecting C60 are respectively measured, the compressive strength of the comparative C60 test piece is 71.8MPa, the compressive strength of the test piece for detecting C60 is 68.2MPa, and the activity index of the waste ceramic sludge is 95% through calculation.
Analysis of results
Example 1 the waste ceramic sludge slurry is converted into solid components to replace 10% of cement, the mortar test piece is thermally cured, and the activity index of the waste ceramic sludge slurry passing the mortar test piece is 88%; comparative example 1 the waste ceramic sludge slurry was converted into solid components to replace 10% of cement, the mortar test piece was maintained in a standard manner, and the activity index of the waste ceramic sludge slurry tested was 80%.
Comparative example 2 the waste ceramic sludge slurry is converted into solid components to replace 10% of cement in C60 concrete, the test piece is cured by heat, and the activity index of the tested waste ceramic sludge slurry is 94.1%; comparative example 3 the waste ceramic sludge slurry was converted into solid components to replace 10% of cement in C60 concrete, the test piece was maintained in a standard manner, and the activity index of the waste ceramic sludge slurry tested was 95%.
The activity indexes of the waste ceramic sludge detected in the example 1 are closer to those of the practical comparative examples 2 and 3; and the deviation of the activity index of the waste ceramic slurry detected in example 1 and comparative example 1 is large. The comparison shows that: the embodiment of the invention is more suitable for detecting the activity index of the waste ceramic polishing slurry, and can objectively evaluate the activity index of the waste ceramic polishing slurry for concrete.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for detecting the activity index of waste ceramic polishing slurry is characterized by comprising the following steps:
preparing a tested mortar test piece and a contrast mortar test piece; the preparation raw materials of the checked mortar test piece contain waste ceramic polishing silt slurry and first cement, the preparation raw materials of the comparison mortar test piece contain second cement, the sum of the solid weight of the waste ceramic polishing silt slurry and the weight of the first cement is equal to the weight of the second cement, and the water-cement ratio and the sand-cement ratio in the preparation raw materials of the checked mortar test piece are respectively equal to the water-cement ratio and the sand-cement ratio in the preparation raw materials of the comparison mortar test piece;
maintaining the tested mortar test piece and the comparative mortar test piece; the maintenance treatment comprises the steps of removing a mold of a prepared and molded test piece, and then sequentially maintaining a heating stage, a constant temperature stage and a cooling stage;
detecting the compressive strength of the tested mortar test piece and the comparative mortar test piece after the maintenance treatment to respectively obtain a first compressive strength value and a second compressive strength value; and calculating the ratio of the first compressive strength value to the second compressive strength value to obtain the activity index of the waste ceramic polishing slurry.
2. The method for detecting the activity index of the waste ceramic polishing slurry according to claim 1, wherein the water-to-gel ratio of the raw materials for preparing the tested mortar sample is 0.3 and the sand-to-gel ratio is 3, and the water-to-gel ratio of the raw materials for preparing the comparative mortar sample is 0.3 and the sand-to-gel ratio is 3.
3. The method for detecting an activity index of the waste ceramic polishing slurry according to claim 1, wherein the flow rate of the mortar in the raw material for preparing the tested mortar specimen is 200 ± 10mm, and the flow rate of the mortar in the raw material for preparing the comparative mortar specimen is 200 ± 10 mm.
4. The method for detecting an activity index of the waste ceramic polishing slurry as set forth in claim 1, wherein the solid concentration of the waste ceramic polishing slurry is 40-50%.
5. The method for detecting an activity index of the waste ceramic polishing slurry according to claim 1, wherein a ratio of a weight of solids in the waste ceramic polishing slurry to a weight of the first cement is 1: 9.
6. The method for detecting the activity index of the waste ceramic polishing slurry according to claim 1, wherein the temperature rise rate in the temperature rise stage is not more than 15 ℃/h, the temperature drop rate in the temperature drop stage is not more than 15 ℃/h, and the temperature range in the constant temperature stage is 85 ℃ ± 5 ℃.
7. The method for detecting an activity index of the waste ceramic polishing slurry according to claim 6, wherein the constant temperature stage is performed for 48 hours.
8. The method for detecting the activity index of the waste ceramic polishing slurry according to claim 1, wherein the ambient temperature for detecting the compressive strength of the tested mortar specimen and the comparative mortar specimen after the curing treatment is 20 ℃ to 25 ℃.
9. The method for detecting an activity index of waste ceramic polishing slurry according to claim 1, wherein in the step of maintenance treatment, the molded test piece is maintained in a standard maintenance room for 24 hours before being demoulded.
10. The method for detecting an activity index of the waste ceramic polishing slurry according to any one of claims 1 to 9, wherein the waste ceramic polishing slurry is a waste ceramic polishing slurry for concrete.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142347A (en) * | 2020-10-22 | 2020-12-29 | 青岛即墨中联水泥有限公司 | Manufacturing process of cement-based sample for detection |
| CN114660277A (en) * | 2022-04-07 | 2022-06-24 | 葛洲坝石门特种水泥有限公司 | Detection method for rapidly predicting 28-day strength of cement |
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| CN114660277B (en) * | 2022-04-07 | 2023-08-18 | 葛洲坝石门特种水泥有限公司 | Detection method for rapidly predicting 28-day strength of cement |
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