CN116023063A - Concrete segregation-resistant agent composition, concrete segregation-resistant agent suitable for mixer truck and preparation method of concrete segregation-resistant agent - Google Patents
Concrete segregation-resistant agent composition, concrete segregation-resistant agent suitable for mixer truck and preparation method of concrete segregation-resistant agent Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims abstract description 102
- 238000005204 segregation Methods 0.000 title claims abstract description 75
- 239000000203 mixture Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 43
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 230000008719 thickening Effects 0.000 claims abstract description 12
- 230000003381 solubilizing effect Effects 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000004806 packaging method and process Methods 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 13
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000292 calcium oxide Substances 0.000 claims description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 12
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 12
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 8
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 8
- 239000011707 mineral Substances 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000391 magnesium silicate Substances 0.000 claims description 6
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 6
- 235000019792 magnesium silicate Nutrition 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229920002907 Guar gum Polymers 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- 239000000665 guar gum Substances 0.000 claims description 2
- 235000010417 guar gum Nutrition 0.000 claims description 2
- 229960002154 guar gum Drugs 0.000 claims description 2
- 150000008130 triterpenoid saponins Chemical class 0.000 claims description 2
- 239000000230 xanthan gum Substances 0.000 claims description 2
- 229920001285 xanthan gum Polymers 0.000 claims description 2
- 235000010493 xanthan gum Nutrition 0.000 claims description 2
- 229940082509 xanthan gum Drugs 0.000 claims description 2
- 229910021487 silica fume Inorganic materials 0.000 claims 1
- 230000000740 bleeding effect Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 238000012360 testing method Methods 0.000 description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 description 9
- 229920002451 polyvinyl alcohol Polymers 0.000 description 9
- 238000010276 construction Methods 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011863 silicon-based powder Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000004566 building material Substances 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
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention provides a concrete segregation-resistant agent composition, a concrete segregation-resistant agent suitable for a mixer truck and a preparation method thereof. The concrete segregation-resistant agent composition comprises the following raw materials in parts by mass: 30-50 parts of thickening water-retaining component, 30-50 parts of dispersing component, 2-5 parts of air entraining component and 15-25 parts of dampproof solubilizing component. A concrete segregation reducing agent suitable for use in a mixer truck comprises the concrete segregation reducing agent composition. The preparation method comprises the following steps: adding the dispersed components into a mixing container, adding the thickening water-retaining component and the air entraining component in a stirring state, and carrying out first mixing; adding a moisture-proof solubilizing component, and carrying out second mixing; and (5) sub-packaging the obtained mixed components in an inner layer package, and finally sleeving the inner layer package with an outer layer package. The concrete segregation reducing agent composition can effectively solve segregation and bleeding problems when the concrete is used, and the concrete segregation reducing agent composition suitable for a mixer truck has the advantages of flexibility, convenience, rapidness and high efficiency, and the preparation method is simple and safe and is convenient for industrialized popularization and use.
Description
Technical Field
The invention belongs to the technical field of building material additives, and particularly relates to a concrete segregation-resistant agent composition, a concrete segregation-resistant agent suitable for a mixer truck and a preparation method thereof.
Background
At present, the foundation construction of China continuously and rapidly develops, and the concrete demand as a main material of the foundation construction is high. The sand source of one of the main materials of the concrete is tense, the quality is difficult to guarantee, and in addition, the control capacity of operators is insufficient, segregation and bleeding phenomena occur frequently after the concrete is transported to a construction site, so that the normal use is affected. Conventional solutions for such situations at the present stage in the art are: 1. returning to the stirring station, adding sand ash for adjustment, and then transporting to a construction site for use, wherein the method is time-consuming and labor-consuming; 2. waiting for a plurality of hours on site, waiting for the proper hydration slump of the concrete part, and then using the concrete part to seriously idle work; 3. cellulose, naphthalene powder or anti-segregation agent is added from the opening of the mixer to wash into the tank with water to reduce bleeding, the method cannot be quickly and uniformly mixed, and water is required to be added again, so that the strength of the concrete is reduced. Meanwhile, the existing anti-segregation agent has the problems of inconvenient use, poor compatibility and the like.
Therefore, the anti-segregation agent for the mixer truck has good compatibility, can rapidly solve the problems of concrete segregation, bleeding and the like in a construction site, can ensure that the workability, the fluidity, the cohesiveness, the wrapping property, the homogeneity, the compactness and the like of the concrete reach the optimal state, and has no influence on the strength and the durability.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide a concrete segregation-resistant agent composition, a concrete segregation-resistant agent suitable for a mixer truck and a preparation method thereof, so as to solve the problems.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the concrete segregation-resistant agent composition comprises the following raw materials in parts by mass: 30-50 parts of thickening water-retaining component, 30-50 parts of dispersing component, 2-5 parts of air entraining component and 15-25 parts of dampproof solubilizing component.
Optionally, the thickening and water-retaining component comprises one or more of anionic polyacrylamide, hydroxypropyl methyl cellulose ether, xanthan gum, and guar gum.
The thickening and water-retaining component can effectively absorb water and thicken, and increase cohesiveness of concrete.
Optionally, the dispersing component comprises one or more of mineral powder, hydrated magnesium silicate and micro silicon powder.
The dispersing component makes the macromolecular thickening water-retaining component quickly dissolve in the dissolving process without converging groups, and can make the slurry have suspension and reduce sedimentation. The preferable range of the invention plays a role in preventing knots, and excessive dosage can increase the dosage of concrete unilateral so as to be inconvenient to carry along with vehicles.
Optionally, the bleed air component comprises sodium alpha-alkenyl sulfonate and/or triterpenoid saponin.
The effective small bubbles can escape after the concrete is isolated, and the appropriate amount of reintroduced small bubbles is beneficial to the long-term durability development of the concrete, preferably 2-5% of the small bubbles is used, and excessive use of the small bubbles can cause the air content of the concrete to be too high, so that the strength of the concrete is reduced.
Optionally, the moisture resistant solubilizing component comprises nano calcium oxide.
The nano calcium oxide reacts to become calcium hydroxide through rapid water absorption, and emits a large amount of heat to help the dissolution of components in the system, but excessive use of the nano calcium oxide can increase the unilateral use amount of the concrete, so that the concrete is inconvenient to carry along with vehicles.
A concrete segregation reducing agent suitable for use in a mixer truck comprises the concrete segregation reducing agent composition.
Optionally, the concrete segregation reducing agent suitable for the mixer truck further comprises an outer layer package and an inner layer package;
wherein the outer package is a waterproof bag;
preferably, the inner package is a water-soluble pouch;
preferably, a plurality of independent water-soluble bags are arranged in the waterproof bag.
Optionally, the weight of the water-soluble bag is 0.4-0.8 parts based on the metering standard of the concrete segregation-preventing agent composition.
The nano calcium oxide rapidly absorbs water to react to emit a large amount of heat, so that the water-soluble bag can be rapidly and fully dissolved, and the effective components of the anti-segregation agent are released. The water-soluble bag material provided by the invention is preferably polyethylene PVA, is a water-soluble high-molecular polymer, and is favorable for improving the concrete state after being dissolved.
The product provided by the invention comprises two layers of packages, wherein the outer layer of the package is a waterproof bag, the inner layer of the package is a water-soluble bag, a plurality of independent water-soluble bags filled with the anti-segregation agent composition can be arranged in the waterproof bag according to the use scene, for example, each bag is externally packed with 1kg, 2 500g or 5 200g of water-soluble bags can be arranged in the waterproof bag, the external package is disassembled when in use, the water-soluble bags filled with the anti-segregation agent composition are directly put into the waterproof bags according to the segregation condition and the estimated input quantity of concrete, and the concrete can be restored to the normal state by rapidly stirring for 2-5 minutes without additional water, so that the effects of saving trouble and time and labor in industrial use are achieved. According to experimental verification, the recommended dosage of the concrete segregation-resistant agent provided by the invention is 50-100g of concrete per square.
The preparation method of the concrete segregation-resistant agent suitable for the mixer truck comprises the following steps: adding the dispersion components into a mixing container, adding the thickening water-retaining component and the air entraining component in a stirring state, and carrying out first mixing; then adding a moisture-proof solubilizing component for secondary mixing; and (3) sub-packaging the obtained mixed components in an inner layer package, and finally sleeving the inner layer package with an outer layer package.
Optionally, the first mixing comprises stirring for 5-10min;
preferably, the second mixing comprises stirring for 10min and above until the raw materials are uniformly mixed.
In the preparation process, if the nano calcium oxide is directly contacted with hydroxypropyl methyl cellulose ether or alpha-alkenyl sodium sulfonate, the possibility of agglomeration can be generated for a long time, and according to the preferable feeding sequence, the nano calcium oxide is uniformly stirred, and the nano calcium oxide is strictly forbidden to be directly contacted with the hydroxypropyl methyl cellulose ether or the alpha-alkenyl sodium sulfonate, so that the agglomeration is avoided, and the prepared composition has better performance.
The invention has the beneficial effects that:
the concrete segregation-resistant agent composition provided by the invention has the advantages of simple components, readily available raw materials, low cost and excellent performance, wherein the thickening and water-retaining component can effectively absorb water and thicken, and the cohesiveness of the concrete is increased; the dispersing component enables the macromolecular thickening water-retaining component to be rapidly dissolved in the dissolving process, is not easy to agglomerate, and can suspend the slurry so as to reduce sedimentation, thereby playing a role in preventing caking; the air entraining component has the effect that effective small bubbles can escape after the concrete is isolated, and the appropriate amount of small bubbles are reintroduced to be beneficial to the long-term durability development of the concrete; the moisture resistant solubilizing component aids in the efficient dissolution of other components within the system.
The concrete segregation reducing agent composition is suitable for a mixer truck, on the premise of ensuring that the problems of concrete segregation, bleeding and the like can be effectively solved, the concrete segregation reducing agent composition is more abundant in use scene, more convenient and faster in use mode and more scientific in use amount by virtue of the double-layer package, and particularly has the special design of adding a plurality of inner water-soluble packages into the outer water-proof layer aiming at the special working condition of the mixer truck, so that quick, safe and accurate feeding is realized, and segregation can be removed only by stirring for 2-5 minutes under the condition of not adding other auxiliary agents, so that the concrete can recover to a good state for normal use, and the concrete segregation reducing agent composition has important practical application significance in industrial application.
The preparation method of the invention effectively prevents the agglomeration phenomenon by strictly controlling the addition sequence of the raw materials, has simple and controllable preparation process and low-cost and easily obtained raw materials, and the prepared product has excellent performance and good industrial application prospect.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The preparation method provided by the invention is used for preparing the concrete segregation-resistant agent suitable for the mixer truck, and comprises the following specific steps:
s1: firstly, 17 parts of micro silicon powder, 15 parts of mineral powder and 15 parts of hydrated magnesium silicate are put into a powder mixing kettle to be stirred for 5 minutes;
s2: adding 30 parts of hydroxypropyl methyl cellulose ether (HPMC) and 3 parts of alpha-sodium alkenyl sulfonate into the S1 mixed system under the stirring condition, and continuously stirring for 10 minutes;
s3: adding 20 parts of nano calcium oxide into the product obtained in the step S2, and continuously stirring for more than 10 minutes until the mixture is uniformly mixed to obtain a concrete segregation-resistant agent composition;
s4: and (3) filling the composition obtained in the step (S3) into 0.6 part of polyvinyl alcohol (PVA) water-soluble bags, and filling the bags into waterproof bags to obtain the concrete segregation-resistant agent suitable for the mixer truck.
Example 2
The preparation method provided by the invention is used for preparing the concrete segregation-resistant agent suitable for the mixer truck, and comprises the following specific steps:
s1: firstly, 16 parts of micro silicon powder, 15 parts of mineral powder and 10 parts of hydrated magnesium silicate are put into a powder mixing kettle to be stirred for 4 minutes;
s2: 30 parts of hydroxypropyl methyl cellulose ether (HPMC) and 1 part of alpha-sodium alkenyl sulfonate are added into the S1 mixed system under the stirring condition, and stirring is continued for 10 minutes;
s3: adding 15 parts of nano calcium oxide into the product obtained in the step S2, and continuously stirring for more than 10 minutes until the mixture is uniformly mixed to obtain a concrete segregation-resistant agent composition;
s4: and (3) filling the composition obtained in the step (S3) into 0.6 part of polyvinyl alcohol (PVA) water-soluble bags, and filling the bags into waterproof bags to obtain the concrete segregation-resistant agent suitable for the mixer truck.
Example 3
The preparation method provided by the invention is used for preparing the concrete segregation-resistant agent suitable for the mixer truck, and comprises the following specific steps:
s1: firstly, 15 parts of micro silicon powder, 15 parts of mineral powder and 10 parts of hydrated magnesium silicate are put into a powder mixing kettle to be stirred for 3 minutes;
s2: adding 20 parts of hydroxypropyl methyl cellulose ether (HPMC), 15 parts of anionic polyacrylamide and 5 parts of triton into the S1 mixed system under the stirring condition, and continuously stirring for 10 minutes;
s3: adding 20 parts of nano calcium oxide into the product obtained in the step S2, and continuously stirring for more than 10 minutes until the mixture is uniformly mixed to obtain a concrete segregation-resistant agent composition;
s4: and (3) filling the composition obtained in the step (S3) into 0.6 part of polyvinyl alcohol (PVA) water-soluble bags, and filling the bags into waterproof bags to obtain the concrete segregation-resistant agent suitable for the mixer truck.
Example 4
The preparation method provided by the invention is used for preparing the concrete segregation-resistant agent suitable for the mixer truck, and comprises the following specific steps:
s1: firstly, 10 parts of micro silicon powder, 15 parts of mineral powder and 17 parts of hydrated magnesium silicate are put into a powder mixing kettle to be stirred for 5 minutes;
s2: adding 40 parts of hydroxypropyl methyl cellulose ether (HPMC) and 3 parts of alpha-sodium alkenyl sulfonate into the S1 mixed system under the stirring condition, and continuously stirring for 10 minutes;
s3: adding 15 parts of nano calcium oxide into the product obtained in the step S2, and continuously stirring for more than 10 minutes until the mixture is uniformly mixed to obtain a concrete segregation-resistant agent composition;
s4: and (3) filling the composition obtained in the step (S3) into 0.6 part of polyvinyl alcohol (PVA) water-soluble bags, and filling the bags into waterproof bags to obtain the concrete segregation-resistant agent suitable for the mixer truck.
Comparative example 1
Commercial concrete segregation-preventing agent A, recommended amount: 0.5 to 1.5 percent of the mass of the concrete.
Comparative example 2
Commercial concrete segregation-preventing agent B, recommended amount: 0.5-1.5KG per 10 square concrete.
Performance test:
for the concrete segregation reducing agents provided in examples 1-4 and comparative examples 1-2, two kinds of concrete with different mix ratios were used for performance test, and the concrete test method is as follows:
1. c30 mixing ratio 1m 3 The concrete comprises the following components: 175kg of water, 336kg of cement, 84kg of fly ash, 812kg of river sand, 993kg of crushed stone and 4.2kg of polycarboxylic acid water reducer;
the cement adopts intermediate P.O42.5 cement, the fine aggregate is river sand with fineness modulus of 3.1, and the mud content is 0.8%; the coarse aggregate is continuous graded broken stone with the grain diameter of 5-31.5 mm; the fly ash is F.II grade; the test water meets the specification of JGJ 63-2006 "Standard for Water for concrete", and is tested according to GB/T50080-2016 "Standard for Performance test of common concrete mixtures", the test results are shown in Table 1 below:
TABLE 1 results of anti-segregation property test of examples 1-4 and comparative examples 1-2 for C30 mix concrete
2. C50 mixing ratio 1m 3 The concrete comprises the following components: 160kg of water, 422kg of cement, 52kg of fly ash, 52kg of mineral powder, 671kg of river sand, 1073kg of crushed stone (5-20 mm), and 5.04kg of polycarboxylic acid water reducer;
the cement adopts intermediate P.O42.5 cement, the fine aggregate is river sand with fineness modulus of 3.1, and the mud content is 0.8%; the coarse aggregate is continuous graded broken stone with the grain diameter of 5-20 mm; the mineral powder is S95 grade; the fly ash is of grade F.I; the test water accords with the regulation of JGJ 63-2006 water Standard for concrete;
the test was carried out according to GB/T50080-2016 Standard for Performance test of common concrete mixtures, the test results are shown in Table 2 below:
TABLE 2 results of anti-segregation property test of examples 1-4 and comparative examples 1-2 for C50 mix concrete
As can be seen from the experimental data in Table 1, the C30 concrete was tested using different stirring times in example 1, and the experimental results showed a difference in segregation resistance, wherein the test result of the re-stirring time of 60s was significantly worse than the test result of the re-stirring time of 120 s. It is speculated from this that the water-soluble package bag can be completely dissolved at 120s and above, and the anti-segregation agent performance can be fully released;
as shown in Table 2, the dissolution time of the water-soluble bag is prolonged to 180s in the C50 concrete experiment, and the results of the experiment achieve the aim of effectively improving the concrete construction state, ensure the concrete construction property and strength, properly improve the air content and are beneficial to the long-term durability of the concrete engineering.
As can be seen from tables 1 and 2, the segregation reducing agents for concrete according to examples 1 to 4 of the present invention effectively solve segregation phenomenon of concrete. The concrete state after being improved by using the segregation reducing agent provided by the invention is obviously better than the concrete after being improved by using the commercially available segregation reducing agent. On the premise of better anti-segregation technical effect, the dosage of the anti-segregation agent provided by the invention is obviously reduced compared with that of the conventional commercial anti-segregation agent, and the industrial use cost is greatly saved.
Meanwhile, through test verification, the concrete segregation-resistant agent provided by the invention can be put into different parts and different dosages for use according to use requirements after being packaged by the water-soluble bag, and is more flexible and convenient.
Note that the technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be regarded as the scope of the description. The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. The concrete segregation-resistant agent composition is characterized by comprising the following raw materials in parts by mass: 30-50 parts of thickening water-retaining component, 30-50 parts of dispersing component, 2-5 parts of air entraining component and 15-25 parts of dampproof solubilizing component.
2. The concrete segregation-resistant agent composition of claim 1, wherein the thickening and water-retaining component comprises one or more of anionic polyacrylamide, hydroxypropyl methylcellulose ether, xanthan gum, guar gum.
3. The concrete segregation-resistant composition of claim 1, wherein the dispersing component comprises one or more of mineral powder, hydrated magnesium silicate, and microsilica.
4. The concrete segregation-resistant agent composition of claim 1, wherein the bleed air component comprises sodium alpha-alkenyl sulfonate and/or triterpenoid saponin.
5. The concrete segregation-resistant agent composition of claim 1, wherein the moisture-resistant solubilizing component comprises nano calcium oxide.
6. A concrete segregation reducing agent suitable for use in a mixer truck comprising the concrete segregation reducing agent composition of any one of claims 1 to 5.
7. The concrete segregation reducing agent for a mixer truck of claim 6, further comprising an outer wrap and an inner wrap;
wherein the outer package is a waterproof bag;
preferably, the inner package is a water-soluble pouch;
preferably, a plurality of independent water-soluble bags are arranged in the waterproof bag.
8. The concrete segregation reducing agent for a mixer truck according to claim 7, wherein the weight of the water-soluble pouch is 0.4 to 0.8 parts based on the weight of the concrete segregation reducing agent composition.
9. A method of preparing a concrete segregation reducing agent suitable for use in a mixer truck as defined in any one of claims 6 to 8, comprising: adding the dispersion components into a mixing container, adding the thickening water-retaining component and the air entraining component in a stirring state, and carrying out first mixing; then adding a moisture-proof solubilizing component for secondary mixing; and (3) sub-packaging the obtained mixed components in an inner layer package, and finally sleeving the inner layer package with an outer layer package.
10. The method of preparing according to claim 9, wherein the first mixing comprises stirring for 5-10min;
preferably, the second mixing comprises stirring for 10min and above until the raw materials are uniformly mixed.
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| CN118062398A (en) * | 2024-04-22 | 2024-05-24 | 山东浩宇建材科技有限公司 | Polycarboxylic acid high-performance water reducer temperature control storage equipment and application method thereof |
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| CN110590223A (en) * | 2019-10-24 | 2019-12-20 | 山东鲁碧建材有限公司 | Concrete segregation resisting agent and concrete |
| CN112110670A (en) * | 2020-09-23 | 2020-12-22 | 四川鼎德商品混凝土有限公司 | Preparation method of segregation-resisting agent for concrete and product thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118062398A (en) * | 2024-04-22 | 2024-05-24 | 山东浩宇建材科技有限公司 | Polycarboxylic acid high-performance water reducer temperature control storage equipment and application method thereof |
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