CN113780734A - Method for determining using amount of cladding material in coral aggregate modification treatment and modification method - Google Patents
Method for determining using amount of cladding material in coral aggregate modification treatment and modification method Download PDFInfo
- Publication number
- CN113780734A CN113780734A CN202110903963.2A CN202110903963A CN113780734A CN 113780734 A CN113780734 A CN 113780734A CN 202110903963 A CN202110903963 A CN 202110903963A CN 113780734 A CN113780734 A CN 113780734A
- Authority
- CN
- China
- Prior art keywords
- coral
- coating material
- aggregate
- coral aggregate
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 235000014653 Carica parviflora Nutrition 0.000 title claims abstract description 120
- 241000243321 Cnidaria Species 0.000 title claims abstract description 120
- 239000000463 material Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000012986 modification Methods 0.000 title claims abstract description 24
- 230000004048 modification Effects 0.000 title claims abstract description 24
- 238000002715 modification method Methods 0.000 title claims abstract description 19
- 238000005253 cladding Methods 0.000 title description 2
- 239000011248 coating agent Substances 0.000 claims abstract description 113
- 238000000576 coating method Methods 0.000 claims abstract description 113
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000004568 cement Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 9
- 238000004364 calculation method Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000004035 construction material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 8
- 239000004576 sand Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000007385 chemical modification Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910021487 silica fume Inorganic materials 0.000 description 2
- 239000004034 viscosity adjusting agent Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/08—Construction
Abstract
The invention belongs to the technical field of civil construction materials, and particularly relates to a method for determining the using amount of a coating material in coral aggregate modification treatment and a modification method. The method has high goodness of fit with actual test results through strict theoretical calculation, can accurately process the coral aggregates according to different surface coating design thicknesses, realizes uniform coating of different aggregates, has no redundant slurry, can not be connected into a cluster, does not need to spread in a large area, fully ensures the coating treatment effect, and can not cause waste of coating materials. The method avoids the problems that in the coral aggregate modification method in the prior art, the using amount of the coating material is often difficult to determine, if the coating material is too much, the coral aggregate is required to be paved and maintained because of the existence of fine components, the coral aggregate is connected with the coating material, the site resources are occupied, and the waste of the coating material is caused to a great extent; if the coating material is too little, the resistance is high during stirring, and the coating is not uniform.
Description
Technical Field
The invention belongs to the technical field of civil construction materials, and particularly relates to a method for determining the using amount of a coating material in coral aggregate modification treatment and a modification method.
Background
With the continuous promotion of the ocean development strategy, the construction amount of the infrastructure of the offshore islands or coastal areas is greatly increased, as an important component of the concrete raw material, the common river sand and gravel resources are extremely deficient on the offshore islands, and the transportation of the gravel raw material from the continents can greatly increase the construction cost and prolong the construction period. On the premise of not damaging the local ecological environment, the coral aggregate concrete is prepared by using the waste coral reef sand on the island reef as a raw material, so that the natural sandstone resources can be saved, the transportation cost is reduced, the construction period is shortened, the construction requirements of deep sea development and development engineering in areas far away from a coastline can be effectively met, and the artificial island constructed in the ocean has important practical significance and high application value.
The natural coral aggregate has the characteristics of large porosity, strong water absorption, low strength and high content of harmful ions, and the direct application of the natural coral aggregate in concrete preparation causes the problems of poor workability, low strength, inconsistent strength development in the early and later stages, poor durability and the like, thereby seriously restricting the application of the natural coral aggregate in offshore and island engineering construction.
At present, a plurality of workers have studied aiming at the modification mode of the coral aggregate, the main treatment method comprises mechanical and chemical modification, and the mechanical modification is to improve the particle type, the surface roughness and the like of the low-quality aggregate through mechanical action; the chemical modification is to adopt inorganic or organic materials to soak and dry the low-quality aggregate, and utilize the filling and film-forming effects of the slurry to reduce the water absorption of the low-quality aggregate and improve the strength of the aggregate.
However, the above method has certain disadvantages, for example, mechanical modification cannot precisely control the modification effect, energy consumption is high and a large amount of waste powder is generated; the chemical modification is still in the experimental research stage at present, the conventional inorganic material can not enter the inside of coral sand pores, the fluidity and the film-forming property of the polymer material are good, but the compatibility with the cement concrete material is not good, and the modification effect is limited; the surface is coated and modified, the dosage of a coating material is difficult to determine, the dosage is generally large, if the coating material is too much, the aggregates are connected together due to the existence of fine components, paving maintenance is needed, and a large-area maintenance site is needed; if the coating material is too little, the problems of large resistance during stirring, uneven coating and poor modification effect can occur.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems that the using amount of the coating material in the coral aggregate modification process in the prior art is often obtained through repeated tests and is difficult to accurately determine, the defects that excessive using amount affects maintenance, the too small using amount affects performance and the like are overcome, and therefore, the method for determining the using amount of the coating material in the coral aggregate modification process and the modification method are provided.
Therefore, the invention provides the following technical scheme:
the invention provides a method for determining the using amount of a coating material in coral aggregate modification treatment, which comprises the following steps:
aggregate screening: screening the coral aggregates to be treated according to particle sizes to obtain N parts of coral aggregates with different particle size ranges;
acquiring parameters: acquiring performance parameters of the coating material and the coral aggregates in each particle size range;
calculating the dosage: the amount of the coating material was calculated according to the following formula,
in the formula, mSlurry i-the mass of the coating material needed by the ith coral aggregate is g;
ρc-i th coral aggregate bulk density in g/cm3；
ρpDensity of the coating material in g/cm3；
Ri-median particle size in cm of the ith coral aggregate;
mi-the particle size of the ith coral aggregate in g;
di-a preset coating thickness of the ith coral aggregate in cm;
Mpulp and its production process-the mass of coating material in g required for the coral aggregates over the particle size interval.
Optionally, N is an integer between 2 and 6.
Optionally, the parameters obtained in the parameter obtaining step include the density of the coating material, and the mass, average particle size and bulk density of the coral aggregate in each particle size range.
Optionally, the preset coating thickness d of the ith coral aggregateiIs 0.05-0.2 cm.
Optionally, the coating material is prepared from the following components in percentage by mass: 46-50% of cement; 10-15% of mineral admixture; 2-5% of active powder; 30.5 to 36.3 percent of water; 0.2 to 0.6 percent of water reducing agent; 0.001-0.004% of viscosity regulator; 0 to 3.2 percent of expanding agent; 0 to 0.12 percent of air entraining agent; 0 to 0.0007 percent of defoaming agent.
Wherein the mineral admixture is at least one of fly ash and slag;
the active powder is at least one of silica fume and ground slag;
the water reducing agent is at least one of polycarboxylic acid high-efficiency water reducing agents;
the viscosity modifier is at least one of cellulose ether thickeners;
the expanding agent is at least one of calcium sulphoaluminate expanding agents or magnesium oxide expanding agents;
the defoaming agent is at least one of polyether defoaming agent or organic silicon defoaming agent;
the air entraining agent is at least one of rosin air entraining agents.
The invention provides a modification method of coral aggregates, which comprises the following steps:
s1, obtaining the using amount of the coating material according to the method;
s2, weighing the components of the required raw materials respectively according to the dosage of the obtained coating material, wherein the raw materials comprise a liquid component and a solid component;
and S3, adding the coral aggregate to be treated into the required liquid component, stirring for the first time, adding the required solid component, stirring for the second time, and maintaining to obtain the modified coral aggregate.
Optionally, the time for the primary stirring is 1-4 min;
the time of the secondary stirring is 2-6 min.
Optionally, room temperature curing is performed. The maintenance does not need to pave, and the maintenance can be piled up under room temperature, saves the place.
Optionally, the curing time is 8-24 h.
Optionally, the mass ratio of the liquid component to the solid component in the coating material is 0.43-0.58.
In the invention, the theoretical basis of the method for determining the using amount of the coating material in the coral aggregate modification treatment is as follows:
assuming that the coral aggregate is spherical (as shown in FIG. 1), and the thickness of the exterior coating slurry is d, the calculated mass is McMass M of coating material required by coral aggregatep：
Volume formula V of single spherical coralcComprises the following steps:
mass m of single coralcComprises the following steps:
volume V of coating material on surface of single coralpComprises the following steps:
mass m of coating material on surface of single coralpComprises the following steps:
mass McMass M of coating material required by coral aggregatepComprises the following steps:
wherein:
mpthe mass of the coating material on the surface of the single coral aggregate is g;
mc-mass of individual coral aggregates in g;
Vcvolume of individual coral aggregates in cm3；
VpVolume of slurry wrapped on surface of single coral aggregate in cm3；
Mc-total mass of coral aggregates in g;
Mpmass McThe coral aggregate needs the quality of the coating material, and the unit is g;
r is the section radius of the coral aggregate, and the unit is cm;
d-thickness of the coating in cm
ρcBulk density of coral skeleton in g/cm3；
ρpDensity of the coating material in g/cm3。
Further considering the particle composition of the coral aggregates, the obtained coating material has the following mass calculation formula:
in the formula, mSlurry iThe mass of the coating material required by the ith coral aggregate is g;
ρcthe ith fractionThe coral skeleton has loose density in g/cm3；
ρpDensity of the coating material in g/cm3；
The median particle size of Ri-ith coral aggregate is in cm;
mi-particle size of ith coral aggregate in g;
di-a preset coating thickness of the ith coral aggregate in cm;
Mpulp and its production process-the mass of coating material in g required for the coral aggregates over the particle size interval.
The technical scheme of the invention has the following advantages:
1. the method for determining the using amount of the coating material in the coral aggregate modification treatment provided by the invention has the advantages that the method has high matching degree with an actual test result through strict theoretical calculation, can accurately treat the coral aggregate according to different surface coating design thicknesses, realizes uniform coating of different aggregates, has no redundant slurry, can not be connected into a cluster, does not need to spread a large area, comprehensively ensures the coating treatment effect, and can not cause waste of the coating material. The method avoids the problems that in the coral aggregate modification method in the prior art, the using amount of the coating material is often difficult to determine, if the coating material is too much, the coral aggregate is required to be paved and maintained because of the existence of fine components, the coral aggregate is connected with the coating material, the site resources are occupied, and the waste of the coating material is caused to a great extent; if the coating material is too little, the resistance is high during stirring, and the coating is not uniform.
2. The coating material adopted in the invention is a cement-based coating material, and the coating material with good filling property and compatibility to the coral aggregate is obtained by adjusting each active component in the cement-based material and adjusting and controlling the additive, particularly by adding the mineral admixture and the active component.
3. The invention provides a coral aggregate modification method, which comprises the steps of firstly adding a liquid part in a coating material to enable the treatment of the coral aggregate to be similar to a saturated surface dry state, uniformly stirring, then adding a powder cementing material, so that powder can be uniformly adhered to the surface of the coral aggregate, adopting the technology, accurately calculating slurry with different coating thicknesses, adding water and powder firstly, ensuring that particles are not cemented together after coating, being convenient for maintenance, directly using the mixture in the preparation of mortar and concrete after stacking for 8-24h, and having quick method and good effect. The method avoids the problems that the traditional treatment method prepares a liquid coating material firstly and then adds the aggregate, and because of the existence of coral fine aggregate components, the particle size is small, the water absorption rate is high, the surface bonding is not firm due to over-thin slurry, and the uniform coating is difficult to realize due to over-thick slurry. The strength of the modified coral aggregate obtained by this method (reduction in crushing index value by 30 or more) realizes interface modification of a low-quality coral aggregate, increases the bulk density (prevention of floating and delamination), and reduces the water absorption (reduction in water absorption by 20 or more in 24 hours).
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a coating structure of coral aggregates;
wherein, 1, coral aggregate; 2. a surface coating material; r, the section radius of the coral aggregate, and the unit is cm; d. the thickness of the coating layer is preset and is in cm.
FIG. 2 is a picture of the coated coral aggregates of example 1 of the present invention.
FIG. 3 is a photograph of the coated coral aggregate of comparative example 3 of the present invention.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
Example 1
The embodiment provides a coral aggregate modification method, which comprises the following specific steps:
coating material dosage determination
1. Sieving, namely sieving 100kg of coral aggregate into 25kg with the particle size of 4.75-9 mm; 50kg with the grain diameter of 9.5-16 mm; 25kg with the particle size of 16-19 mm;
2. determining the values of all parameters in a calculation formula: the density of the slurry material used for treating the coral aggregate was tested, in this example, the cement-based mixed material with a water-to-cement ratio of 0.47 was used as the coating material, and the density ρ was obtained by the testpIs 2000kg/m3(ii) a The loose bulk density of all intervals of the coral aggregate is tested to be 973kg/m in sequence3；965kg/m3；954kg/m3(ii) a The thickness of the coating layer is 1 mm;
3. and respectively calculating the coating materials required by the coral aggregates at all levels according to the grading average particle size, and obtaining the total consumption of the coating materials to be 55.8 kg.
Modification treatment
1. Taking 100kg of coral aggregate, and taking 55.8kg of coating material according to a proportion, wherein the coating material comprises 17.8kg of water, 27.9kg of cement, 5.56kg of fly ash, 2.78kg of slag, 1.5kg of silica fume, 0.1kg of water reducing agent, 0.03kg of viscosity modifier, 0.1kg of expanding agent, 0.05kg of air entraining agent and 0.003kg of defoaming agent.
2. Adding coral aggregate into a stirrer, adding weighed water, stirring for 120s to obtain an intermediate, slowly adding the powder while stirring, continuously stirring for 3min, discharging, stacking, and maintaining at room temperature for 16h to obtain the modified coral aggregate.
Example 2
The embodiment provides a coral aggregate modification method, which comprises the following specific steps:
the first step is as follows: sieving was carried out as in example 1.
The second step is that: the proportion of the coating material is the same as that of the coating material in the embodiment 1, and the thickness of the coating layer is selected to be 2 mm;
the third step: and respectively calculating the coating materials required by the sieved parts of each stage according to the grading average particle size, and obtaining the total dosage of the coating materials to be 111.6 kg.
The fourth step: 100kg of coral sand is taken, and 111.6kg of coating material is taken according to the proportion.
The fifth step: adding coral sand into a stirrer, adding weighed water, stirring for 120s to obtain an intermediate, slowly adding the powder while stirring, continuously stirring for 3min, discharging, stacking, and maintaining at room temperature for 16h to obtain the modified coral aggregate.
Comparative example 1
The comparative example provides a modification method of coral aggregates, which comprises the following specific steps:
the coral sand is treated by using cement paste with water-cement ratio of 0.47 as coating material, the thickness of the coating layer is 1mm, the dosage of the coating material is 55.8kg, and the specific modification method is the same as that of example 1.
Comparative example 2
The comparative example provides a modification method of coral aggregates, which comprises the following specific steps:
the coral sand was treated with the cement-based coating material of example 1 with a target design coating thickness of 1mm, and the optimum amount (10%, 15%, 20%) was determined by a test method.
The modification method was the same as in example 1.
Comparative example 3
The comparative example provides a modification method of coral aggregates, which comprises the following specific steps:
the coating material obtained in the embodiment 1 is used in the amount and the ratio, and the difference lies in a modification method, and the specific modification method comprises the steps of firstly mixing the cement-based coating material, adding the coral aggregate after the mixing is finished, continuously stirring for 3min, discharging, stacking, and curing at room temperature for 16h to obtain the modified coral aggregate.
The modified coral aggregates obtained in examples 1 to 2 and comparative examples 1 to 3 of the present invention were tested, and the test items included the thickness of the coating layer, loose bulk density, crush value and water absorption, and the specific test methods and standards were as follows:
1. coating thickness test
The treated aggregate is cut and observed under an optical microscope or a scanning electron microscope to obtain the thickness of the surface coating, and the average value of 10 aggregates is taken as the thickness value of the coating.
2. Loose bulk density test
The test is carried out according to the method in GB/T14685 construction pebbles and broken stones.
3. Crush value test
The test is carried out according to the method in GB/T14685 construction pebbles and broken stones.
4. Water absorption test
The test is carried out by referring to the quality of the sand and the stone for the JGJ 52 common concrete and the method in the standard of the test method.
The test results are given in the following table:
TABLE 1
As can be seen from the data in the table, the loose bulk density of the modified coral aggregate prepared by the method is obviously improved, and the crushing value is greatly reduced, which shows that the strength improvement effect of the treatment method on the porous coral aggregate is obvious; the aggregate water absorption is obviously reduced, and the workability of the offshore concrete can be effectively improved.
Compared with the comparative example 1, the embodiment 1 shows that the coating material selected by the invention can be effectively combined with the coral aggregate, the coating effect on the coral aggregate is good, and each performance index is superior to that of a single cement paste coating material.
Compared with the comparative example 2, the method has the advantages that the use amount of the coating material can be accurately obtained by adopting the calculation method, the steps are simple, convenient and quick, and the performance of the coral aggregate treated by the method is obviously improved; if the calculation method is not adopted, the acquisition of the using amount of the coating material is time-consuming and labor-consuming, the period is influenced, the appropriate using amount of the coating material is difficult to obtain, slurry is too little to realize the surface coating of all the coral aggregates (10 percent), or the slurry is too much (15 percent and 20 percent), so that the coagulated coral aggregates are cemented together.
Compared with the comparative example 3, the embodiment 2 can see that although the same amount of coating materials are adopted, the coral aggregate is coated by the treatment procedure of the method, the powder can completely coat the surface of the coral aggregate, the picture is darker in color, and the complete coating is shown (see the picture 2); in contrast, uniform coating was clearly not achieved in the comparative example (panel 3).
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A method for determining the using amount of a coating material in coral aggregate modification treatment is characterized by comprising the following steps:
aggregate screening: screening the coral aggregates to be treated according to particle sizes to obtain N parts of coral aggregates with different particle size ranges;
acquiring parameters: acquiring performance parameters of the coating material and the coral aggregates in each particle size range;
calculating the dosage: the amount of the coating material was calculated according to the following formula,
in the formula, mSlurry i-the mass of the coating material needed by the ith coral aggregate is g;
ρc-i th coral aggregate bulk density in g/cm3；
ρpDensity of the coating material in g/cm3；
Ri-median particle size in cm of the ith coral aggregate;
mi-the particle size of the ith coral aggregate in g;
di-a preset coating thickness of the ith coral aggregate in cm;
Mpulp and its production process-the mass of coating material in g required for the coral aggregates over the particle size interval.
2. The method for determining the amount of a coating material to be used in the coral aggregate modification treatment according to claim 1, wherein N is an integer of 2 to 6.
3. The method for determining the amount of a coating material to be used in a coral aggregate modification treatment as set forth in claim 1 or 2, wherein the parameters obtained in said parameter obtaining step include the density of the coating material, the mass, the average particle diameter and the bulk density of the coral aggregate in each particle diameter range.
4. The method for determining the amount of coating material used in the coral aggregate modification treatment according to any one of claims 1 to 3, wherein the predetermined coating thickness d of the i-th coral aggregate is set toiIs 0.05-0.2 cm.
5. The method for determining the using amount of the coating material in the coral aggregate modification treatment, as claimed in claim 4, wherein the coating material is composed of the following components in percentage by mass: 46-50% of cement; 10-15% of mineral admixture; 2-5% of active powder; 30.5 to 36.3 percent of water; 0.2 to 0.6 percent of water reducing agent; 0.001-0.004% of viscosity regulator; 0 to 3.2 percent of expanding agent; 0 to 0.12 percent of air entraining agent; 0 to 0.0007 percent of defoaming agent.
6. A modification method of coral aggregates is characterized by comprising the following steps:
s1, obtaining the dosage of the coating material according to the method of any one of claims 1 to 5;
s2, weighing the components of the required raw materials respectively according to the dosage of the obtained coating material, wherein the raw materials comprise a liquid component and a solid component;
and S3, adding the coral aggregate to be treated into the required liquid component, stirring for the first time, adding the required solid component, stirring for the second time, and maintaining to obtain the modified coral aggregate.
7. The method for modifying coral aggregates according to claim 6, wherein the time of the primary stirring is 1 to 4 min;
the time of the secondary stirring is 2-6 min.
8. The method for modifying coral aggregate according to claim 6 or 7, wherein said curing is carried out at room temperature.
9. The method for modifying coral aggregate according to claim 8, wherein the curing step is carried out for a period of time of 8 to 24 hours.
10. The method for modifying coral aggregates according to any one of claims 6 to 9, wherein the mass ratio of the liquid component to the solid component in the coating material is from 0.43 to 0.58.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110903963.2A CN113780734A (en) | 2021-08-06 | 2021-08-06 | Method for determining using amount of cladding material in coral aggregate modification treatment and modification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110903963.2A CN113780734A (en) | 2021-08-06 | 2021-08-06 | Method for determining using amount of cladding material in coral aggregate modification treatment and modification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113780734A true CN113780734A (en) | 2021-12-10 |
Family
ID=78837108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110903963.2A Pending CN113780734A (en) | 2021-08-06 | 2021-08-06 | Method for determining using amount of cladding material in coral aggregate modification treatment and modification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113780734A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115286315A (en) * | 2022-07-22 | 2022-11-04 | 山东科技大学 | Preparation method of cement paste reinforced and toughened coral aggregate seawater sea sand concrete |
| CN115353313A (en) * | 2022-07-22 | 2022-11-18 | 山东科技大学 | Preparation method of pre-wrapped toughened coral aggregate and seawater sea sand coral aggregate concrete |
| CN116003024A (en) * | 2022-11-25 | 2023-04-25 | 新汶矿业集团地质勘探有限责任公司 | High-strength separation layer grouting material and mixing device thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318795A (en) * | 2008-07-10 | 2008-12-10 | 华南理工大学 | Method for preparing vegetation form cellular concrete |
| CN106814013A (en) * | 2017-01-19 | 2017-06-09 | 国家纳米科学中心 | A kind of method based on the heterogeneous nano particle diameter of spectrum turbidity in site measurement and its coating thickness |
| CN108303056A (en) * | 2017-12-08 | 2018-07-20 | 华南理工大学 | The test method of aggregate surface slurry maximum package layer thickness in pervious concrete |
| CN108455889A (en) * | 2018-02-09 | 2018-08-28 | 济南大学 | The coral aggregate reinforcing slurries of chlorion can be cured in a kind of phosphor aluminate cement base |
| CN110272221A (en) * | 2019-05-27 | 2019-09-24 | 深圳大学 | A kind of preparation method of modified coral sand concrete |
| CN111116136A (en) * | 2019-12-30 | 2020-05-08 | 宁波大学 | Pervious concrete mix proportion design method based on optimal volume slurry-to-bone ratio |
| CN111829474A (en) * | 2020-07-02 | 2020-10-27 | 中南林业科技大学 | Method for testing thickness of ecological porous concrete aggregate slurry coating layer |
| CN111978056A (en) * | 2020-08-27 | 2020-11-24 | 中国建筑材料科学研究总院有限公司 | Modified material of low-quality aggregate and treatment method |
| CN113200697A (en) * | 2021-05-14 | 2021-08-03 | 安徽建筑大学 | Preparation method of chemical micro-corrosion coral aggregate and geopolymer-based ultrahigh-strength coral concrete |
-
2021
- 2021-08-06 CN CN202110903963.2A patent/CN113780734A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318795A (en) * | 2008-07-10 | 2008-12-10 | 华南理工大学 | Method for preparing vegetation form cellular concrete |
| CN106814013A (en) * | 2017-01-19 | 2017-06-09 | 国家纳米科学中心 | A kind of method based on the heterogeneous nano particle diameter of spectrum turbidity in site measurement and its coating thickness |
| CN108303056A (en) * | 2017-12-08 | 2018-07-20 | 华南理工大学 | The test method of aggregate surface slurry maximum package layer thickness in pervious concrete |
| CN108455889A (en) * | 2018-02-09 | 2018-08-28 | 济南大学 | The coral aggregate reinforcing slurries of chlorion can be cured in a kind of phosphor aluminate cement base |
| CN110272221A (en) * | 2019-05-27 | 2019-09-24 | 深圳大学 | A kind of preparation method of modified coral sand concrete |
| CN111116136A (en) * | 2019-12-30 | 2020-05-08 | 宁波大学 | Pervious concrete mix proportion design method based on optimal volume slurry-to-bone ratio |
| CN111829474A (en) * | 2020-07-02 | 2020-10-27 | 中南林业科技大学 | Method for testing thickness of ecological porous concrete aggregate slurry coating layer |
| CN111978056A (en) * | 2020-08-27 | 2020-11-24 | 中国建筑材料科学研究总院有限公司 | Modified material of low-quality aggregate and treatment method |
| CN113200697A (en) * | 2021-05-14 | 2021-08-03 | 安徽建筑大学 | Preparation method of chemical micro-corrosion coral aggregate and geopolymer-based ultrahigh-strength coral concrete |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115286315A (en) * | 2022-07-22 | 2022-11-04 | 山东科技大学 | Preparation method of cement paste reinforced and toughened coral aggregate seawater sea sand concrete |
| CN115353313A (en) * | 2022-07-22 | 2022-11-18 | 山东科技大学 | Preparation method of pre-wrapped toughened coral aggregate and seawater sea sand coral aggregate concrete |
| CN116003024A (en) * | 2022-11-25 | 2023-04-25 | 新汶矿业集团地质勘探有限责任公司 | High-strength separation layer grouting material and mixing device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113780734A (en) | Method for determining using amount of cladding material in coral aggregate modification treatment and modification method | |
| CN103803918A (en) | Porcelain powder waste mixed cement-based tiny-expansion crack repairing mortar and using method thereof | |
| CN101767960A (en) | Recycled concrete coarse aggregate modified processing method | |
| CN112299805A (en) | Sand-free desulfurized gypsum self-leveling mortar and preparation method thereof | |
| CN112592143B (en) | Clay-slag-based harbor seismic strengthening mineral grouting material and preparation method thereof | |
| CN108821698A (en) | A kind of pervious concrete preformed bricks and preparation method thereof | |
| CN107382216A (en) | Fill high-strength concrete of iron tailings and building waste and preparation method thereof | |
| CN107572841A (en) | A kind of low-carbon binder materials and the method for preparing concrete | |
| CN111253127A (en) | C30 carbon fiber broken brick recycled concrete and preparation method thereof | |
| CN106396523A (en) | Using method of geopolymer based self-levelling ground material | |
| CN110563400B (en) | Crack self-repairing partition plate with mixed recycled coarse and fine aggregates and preparation method thereof | |
| CN108101432A (en) | A kind of structure gradient type cement base permeable pavement brick and preparation method thereof | |
| CN110395954A (en) | A kind of electrolytic manganese residues lightweight aggregate hollow block and preparation method thereof | |
| CN105130314B (en) | Modification cement slurry for fast repairing concrete | |
| CN113955983A (en) | Preparation method of high-content Changjiang river dredging superfine sand concrete | |
| CN110451876B (en) | Self-repairing concrete with construction waste bricks as carriers and preparation method thereof | |
| CN115159936B (en) | Plastering mortar and preparation method and application thereof | |
| CN110845188A (en) | Sand-free macroporous concrete and preparation method thereof | |
| CN114349455B (en) | Titanium gypsum composite roadbed material raw material, preparation method thereof and titanium gypsum composite roadbed material | |
| CN113248166B (en) | Asphalt pavement milling material particle reinforced stabilizer, preparation method thereof and reinforced stabilization method | |
| CN108863138A (en) | A kind of composite grinding aids and preparation method thereof improving cement cohesiveness | |
| CN112209701B (en) | Preparation method of all-solid-waste high-water-permeability sintered water permeable brick | |
| CN110606767B (en) | Lightweight aggregate concrete and preparation process thereof | |
| CN106380163A (en) | Desert sand self-leveling mortar, and preparation method and construction method thereof | |
| CN110423052B (en) | Hardened structure and hardened construction method of saline soil ground |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |