CN112028583A

CN112028583A - Anti-permeability wear-resistant concrete and preparation method thereof

Info

Publication number: CN112028583A
Application number: CN202010903599.5A
Authority: CN
Inventors: 计晓隆; 刘志华; 贾进丰
Original assignee: Zhejiang Topang Concrete Co ltd
Current assignee: Zhejiang Topang Concrete Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2020-12-04

Abstract

The application relates to the field of building materials, and discloses anti-permeability wear-resistant concrete and a preparation method thereof, wherein the concrete comprises the following raw materials in parts by weight: 200-350 parts of recycled concrete; 50-75 parts of slag powder; 50-75 parts of fly ash; 600-650 parts of crushed stone; 5-6 parts of straw; 4-5 parts disodium lauryl sulfosuccinate; 2-3 parts of glycidyl acrylate; 0.2-0.4 part of emulsifier. The application has the following advantages and effects: in the presence of an emulsifier, disodium lauryl sulfosuccinate and glycidyl acrylate are mixed to obtain polymer particles with smaller particle size, the stability of the particles is enhanced, the microstructure of concrete is improved, the water cement ratio can be properly reduced due to the surface activity, the concrete is more compact, and the impermeability is improved; hydrogen bonds are easily formed between carboxyl groups of disodium lauryl sulfosuccinate and glycidyl acrylate, and the obtained polymer phase can fill partial capillary pores and other gaps in concrete after the concrete is hardened, so that the impermeability and wear resistance of the concrete are improved.

Description

Anti-permeability wear-resistant concrete and preparation method thereof

Technical Field

The application relates to the technical field of building materials, in particular to anti-permeability wear-resistant concrete and a preparation method thereof.

Background

Concrete is one of the most important civil engineering materials at present. It is an artificial stone material made up by using cementing material, granular aggregate (also called aggregate), water and additive and admixture which are added according to a certain proportion through the processes of uniformly stirring, compacting, forming, curing and hardening.

At present, in order to achieve the purpose of environmental protection, recycled concrete is generally used for preparing new concrete, and with the severer use environment of modern buildings, the demand of concrete with impermeability and wear resistance is increasing, and the impermeability and wear resistance of the current concrete cannot meet the demand, so the improvement is still needed.

Disclosure of Invention

In view of the deficiencies of the prior art, a first object of the present application is to provide an impervious wear-resistant concrete.

A second object of the present application is to provide a method for preparing impervious wear-resistant concrete.

In order to achieve the purpose, the application provides the following technical scheme:

the anti-permeability wear-resistant concrete comprises the following raw materials in parts by weight:

200-350 parts of recycled concrete;

50-75 parts of slag powder;

50-75 parts of fly ash;

600-650 parts of crushed stone;

5-6 parts of straw;

4-5 parts disodium lauryl sulfosuccinate;

2-3 parts of glycidyl acrylate;

0.2-0.4 part of emulsifier.

By adopting the technical scheme, the slag powder and the limestone are added to enhance the structural strength of the concrete; in the presence of an emulsifier, disodium lauryl sulfosuccinate and glycidyl acrylate are mixed to obtain polymer particles with smaller particle size, the stability of the particles is enhanced, the microstructure of concrete is improved, the water cement ratio can be properly reduced through the surface activity of the polymer particles, the concrete is more compact, and the impermeability is improved; on the other hand, disodium lauryl sulfosuccinate and glycidyl acrylate both contain polar carboxyl groups, hydrogen bonds are easily formed between carboxylic acids, the obtained polymer phase can fill partial capillary pores and other gaps in the concrete after the concrete is hardened, and the polymer phase has low elastic modulus, can absorb a large amount of work of external force on the concrete, and improves the overall performance of the concrete, namely the impermeability and the wear resistance.

The present application may be further configured in a preferred example to: the raw materials also comprise 4 to 5 parts of m-anilinomethyl sulfide, 2 to 3 parts of 5-ureidohydantoin and 0.1 to 0.2 part of 4-dimethylaminopyridine according to parts by weight.

By adopting the technical scheme, the m-anilinomethyl sulfide has better permeability, under the catalytic action of 4-dimethylaminopyridine, the m-anilinomethyl sulfide and 5-ureido hydantoin containing ureido capable of playing a role in intermolecular hydrogen bonding react to generate a synergistic effect, and a product obtained by mixing the m-anilinomethyl sulfide and the 5-ureido hydantoin can further permeate partial capillary holes and other gaps in concrete and can further enhance the interface strength, so that the impermeability and the wear resistance of the concrete are stably improved.

The present application may be further configured in a preferred example to: the raw materials also comprise 0.8 to 1 portion of trimethyl hexane diisocyanate according to the weight portion.

By adopting the technical scheme, the trimethylhexane diisocyanate is added, so that on one hand, the dehydration and solidification of the polymer are promoted, and the polymer is enabled to stably fill partial capillary pores and other gaps in the concrete; on the other hand, the interface joint degree is assisted to be enhanced, and the interface strength is improved, so that the impermeability and the wear resistance of the concrete are improved; meanwhile, trimethylhexane diisocyanate is a flexible high-performance polymer, and can assist in improving the overall performance of the concrete.

The present application may be further configured in a preferred example to: the crushed stone is granite with 5-31.5mm continuous gradation.

By adopting the technical scheme, 5-31.5mm continuous graded granite is mixed in concrete, which is beneficial to further improving the wear resistance of the concrete.

The present application may be further configured in a preferred example to: the raw materials also comprise 10-15 parts of molybdenum disulfide by weight.

By adopting the technical scheme, the addition amount of granite can be obviously reduced after molybdenum disulfide is added, and the molybdenum disulfide replaces part of granite, so that the reduction of the inter-component distance is facilitated; molybdenum disulfide chemical stability is good, have the lamellar structure of low shear strength between the layer, can produce the synergism with granite, can reach better wear-resisting effect again when reducing the volume of mixing of wear-resisting aggregate granite, can further improve the wear resistance of concrete and supplementary promotion impermeability.

The present application may be further configured in a preferred example to: the emulsifier is sodium stearate.

By adopting the technical scheme, sodium stearate is used as an emulsifier for mixing disodium lauryl sulfosuccinate and epoxypropyl acrylate, and the particle size of the formed polymer particles is smaller, so that the microstructure of concrete is improved, the concrete is more compact, and the impermeability is improved.

In order to achieve the second object, the present application provides the following technical solutions:

a preparation method of anti-permeability wear-resistant concrete comprises the following steps:

s1, mixing raw materials; mixing the recycled concrete, the slag powder, the fly ash and the crushed stones, adding and stirring the straw which is cut into 20mm small sections while stirring, adding 220 parts of 100-one water and stirring for 5-8 min; then adding the uniformly mixed disodium lauryl alcohol sulfosuccinate, epoxypropyl acrylate and emulsifier, and stirring for 30-50min to obtain a concrete raw material;

s2, compacting and forming; pouring the concrete raw material of S1 into a mould, vertically inserting an insertion vibrator into the lower layer of un-initially-set concrete by 50-100mm vibration for 80-100S;

s3, steam curing concrete; pouring the concrete raw material of S1 into a mould, and pre-curing at 30-40 ℃ for 1-1.5 h; cutting the pre-cured product, and then performing steam curing at the temperature of 180 ℃ and 200 ℃ under the pressure of 10-12MPa for 7-8h to obtain a finished product.

The present application may be further configured in a preferred example to: in the step S1, molybdenum disulfide and crushed stone are added simultaneously; stirring disodium lauryl sulfosuccinate, epoxypropyl acrylate and an emulsifier for 30-50min, then adding trimethyl hexane diisocyanate, stirring for 10-15min, then adding m-anilinomethyl sulfide and 5-ureidohydantoin, heating to 40-50 ℃, dropwise adding 4-dimethylaminopyridine, and stirring for reacting for 1-1.5h to obtain the concrete raw material.

To sum up, the application comprises the following beneficial technical effects:

1. in the presence of an emulsifier, disodium lauryl sulfosuccinate and glycidyl acrylate are mixed to obtain polymer particles with smaller particle size, the stability of the particles is enhanced, the microstructure of concrete is improved, the water cement ratio can be properly reduced due to the surface activity, the concrete is more compact, and the impermeability is improved; hydrogen bonds are easily formed between carboxyl groups of disodium lauryl sulfosuccinate and glycidyl acrylate, and the obtained polymer phase can fill partial capillary pores and other gaps in the concrete after the concrete is hardened, so that the impermeability and the wear resistance of the concrete are improved;

2. the m-anilinomethyl sulfide has good permeability, under the catalytic action of 4-dimethylaminopyridine, the m-anilinomethyl sulfide and 5-ureido hydantoin containing ureido capable of playing a role in intermolecular hydrogen bonding react to generate a synergistic effect, and a product obtained by mixing the m-anilinomethyl sulfide and the 5-ureido hydantoin can further permeate partial capillary pores and other gaps in concrete and can further enhance the interface strength at the same time, so that the impermeability and the wear resistance of the concrete are stably improved;

3. the trimethylhexane diisocyanate is used as a flexible high-performance polymer, and can improve the wear resistance of concrete, promote the dehydration curing of the polymer, assist in enhancing the interface bonding degree, improve the interface strength and improve the impermeability and wear resistance of the concrete by adding the trimethylhexane diisocyanate.

Detailed Description

The present application is described in further detail below.

In the application, the recycled concrete is purchased from Hill Yingbang building materials science and technology Limited; the slag powder is S95 slag powder of Sanyue building materials Co; fly ash is purchased from Yuhuan county, Japan fly ash Co., Ltd; disodium lauryl sulfosuccinate was purchased from southeast Tony, Bangbang Biotech, Inc.; 5-ureidohydantoins were purchased from Ritian Shuihui chemical Co., Ltd, Hubei province.

The raw materials used in the following embodiments may be those conventionally commercially available unless otherwise specified.

Examples

Example 1

The application discloses anti-permeability wear-resistant concrete and a preparation method thereof, wherein the preparation method comprises the following steps:

s1, mixing raw materials; mixing the recycled concrete, the slag powder, the fly ash and the broken stones, adding and stirring the straw which is cut into small sections of 20mm while stirring, adding 100 parts of water and stirring for 5 min; then adding the uniformly mixed disodium lauryl alcohol sulfosuccinate, epoxypropyl acrylate and emulsifier, and stirring for 30min to obtain a concrete raw material;

s2, compacting and forming; pouring the concrete raw material of S1 into a mould, vertically inserting the concrete raw material into a lower layer of un-initially-solidified concrete by using an insertion vibrator, and vibrating for 80S for 50 mm;

s3, steam curing concrete; pouring the concrete raw material of S1 into a mould, and pre-curing at 30 ℃ for 1 h; cutting the precured product, and then steaming at 180 ℃ under 10MPa for 7h to obtain the finished product.

The contents of the components are shown in table 1 below.

Example 2

s1, mixing raw materials; mixing the recycled concrete, the slag powder, the fly ash and the broken stones, adding and stirring the straw which is cut into small sections of 20mm while stirring, adding 220 parts of water and stirring for 8 min; then adding the uniformly mixed disodium lauryl alcohol sulfosuccinate, epoxypropyl acrylate and emulsifier, and stirring for 50min to obtain a concrete raw material;

s2, compacting and forming; pouring the concrete raw material of S1 into a mould, vertically inserting the concrete raw material into a lower layer of un-initially-solidified concrete by using an insertion vibrator, and vibrating for 100S by 100 mm;

s3, steam curing concrete; pouring the concrete raw material of S1 into a mould, and pre-curing at 40 ℃ for 1.5 h; cutting the precured product, and then steaming at 200 ℃ under 12MPa for 8h to obtain the finished product.

The contents of the components are shown in table 1 below.

Example 3

s1, mixing raw materials; mixing the recycled concrete, the slag powder, the fly ash and the broken stones, adding and stirring the straw which is cut into small sections of 20mm while stirring, adding 180 parts of water and stirring for 7 min; then adding the uniformly mixed disodium lauryl alcohol sulfosuccinate, epoxypropyl acrylate and emulsifier, and stirring for 40min to obtain a concrete raw material;

s2, compacting and forming; pouring the concrete raw material of S1 into a mould, vertically inserting the concrete raw material into the lower layer of un-initially-solidified concrete by using an insertion vibrator, and vibrating for 90S by 80 mm;

s3, steam curing concrete; pouring the concrete raw material of S1 into a mould, and pre-curing at 35 ℃ for 1.5 h; cutting the precured product, and then steaming at 190 ℃ under the pressure of 11MPa for 7h to obtain the finished product.

The contents of the components are shown in table 1 below.

Example 4

s1, mixing raw materials; mixing the recycled concrete, slag powder, fly ash, molybdenum dioxide and broken stone, adding and stirring the straw which is cut into small sections of 20mm while stirring, adding 100 parts of water and stirring for 5 min; then adding the uniformly mixed disodium lauryl alcohol sulfosuccinate, epoxypropyl acrylate and emulsifier, and stirring for 30 min; adding trimethylhexane diisocyanate, stirring for 10min, then adding m-anilinomethyl sulfide and 5-ureido hydantoin, heating to 40 ℃, dropwise adding 4-dimethylaminopyridine, and stirring for reacting for 1h to obtain a concrete raw material;

The contents of the components are shown in the following table 2.

Example 5

s1, mixing raw materials; mixing the recycled concrete, slag powder, fly ash, molybdenum dioxide and broken stone, adding and stirring the straw which is cut into small sections of 20mm while stirring, adding 220 parts of water and stirring for 8 min; then adding the uniformly mixed disodium lauryl alcohol sulfosuccinate, epoxypropyl acrylate and emulsifier, and stirring for 50 min; adding trimethylhexane diisocyanate, stirring for 15min, then adding m-anilinomethyl sulfide and 5-ureido hydantoin, heating to 50 ℃, dropwise adding 4-dimethylaminopyridine, and stirring for reacting for 1.5h to obtain a concrete raw material;

The contents of the components are shown in the following table 2.

Example 6

s1, mixing raw materials; mixing the recycled concrete, slag powder, fly ash, molybdenum dioxide and broken stone, adding and stirring the straw which is cut into small sections of 20mm while stirring, adding 180 parts of water and stirring for 7 min; then adding the uniformly mixed disodium lauryl alcohol sulfosuccinate, epoxypropyl acrylate and emulsifier, and stirring for 40 min; adding trimethylhexane diisocyanate, stirring for 13min, then adding m-anilinomethyl sulfide and 5-ureido hydantoin, heating to 45 ℃, dropwise adding 4-dimethylaminopyridine, and stirring for reacting for 1.5h to obtain a concrete raw material;

The contents of the components are shown in the following table 2.

Example 7

The difference from example 4 is that 5-ureidohydantoin was replaced with N-acetylsulfonamidoyl chloride and the amounts of the components are shown in Table 2 below.

Example 8

The difference from example 4 is that 4-dimethylaminopyridine was replaced with maleimide, and the contents of the respective components are shown in Table 2 below.

Example 9

The difference from example 4 is that without the addition of m-anilinomethylsulfide and 5-ureidohydantoin, the amounts of the components are shown in Table 2 below.

Example 10

The difference from example 4 is that trimethylhexane diisocyanate is replaced with p-hydroxybenzene sulfonic acid, and the contents of the components are shown in table 2 below.

Example 11

The difference from example 4 is that molybdenum disulfide is not added, and the content of each component is shown in table 2 below.

Comparative example

Comparative example 1

The difference from example 1 is that the concrete raw materials include recycled concrete, slag powder, fly ash, crushed stone and straw, and the contents of each component are shown in table 1 below.

Comparative example 2

The difference from example 1 is that disodium lauryl sulfosuccinate was replaced with sodium ditridecyl sulfosuccinate, and the contents of the components are shown in Table 1 below.

Comparative example 3

The difference from example 1 is that glycidyl acrylate was replaced with acrylate and the contents of the respective components are shown in table 1 below.

Comparative example 4

The difference from example 1 is that the emulsifier sodium stearate was replaced by sodium dodecylbenzenesulfonate, and the contents of the components are shown in table 1 below.

TABLE 1 component content tables of examples 1 to 3 and comparative examples 1 to 4

TABLE 2 ingredient content tables for examples 4-11

Performance test

The concrete was molded into concrete test pieces of 50mm by 50 mm.

1. Judging whether the prepared concrete is qualified or not by referring to GB175-2007 product standards; the test results are shown in table 3 below.

2. The electric flux of a concrete sample with the age of 28d is measured by adopting an ASTM C1202 test method, the permeability of the concrete is evaluated according to the total electric quantity flowing through the concrete sample within 6h, and the smaller the electric flux is, the better the impermeability is; the test results are shown in table 4 below.

3. The abrasion resistance test is carried out according to GB/T16925-1997 abrasion resistance test method (ball bearing type) for concrete machine products, the tester is an NS2 ball bearing type abrasion resistance tester produced by affiliated factories of the university of Tongji, the side surface of a concrete sample of 28d age is selected as a test surface of the abrasion resistance test, and the larger the abrasion resistance is, the smaller the abrasion loss is, and the stronger the abrasion resistance is; the test results are shown in table 4 below.

TABLE 3 concrete Strength test results of examples 1 to 6

And judging that the concrete is qualified according to the data.

TABLE 4 results of testing anti-permeability and abrasion resistance of each example and comparative example

	Electric flux/C	Degree of wear resistance
			Example 1	411	4.4
Example 2	401	4.8
			Example 3	405	4.6
Example 4	395	5.2
			Example 5	389	5.5
Example 6	392	5.3
			Example 7	464	3.0
Example 8	420	3.7
			Example 9	510	2.1
Example 10	451	3.6
			Example 11	487	2.8
Comparative example 1	859	1.0
			Comparative example 2	462	3.1
Comparative example 3	458	3.5
			Comparative example 4	452	3.6

In summary, the following conclusions can be drawn:

1. as can be seen from example 1 and comparative example 1 in combination with table 3, the concrete produced by the present application has better impermeability and wear resistance.

2. As can be seen from example 1 and comparative examples 2 and 4 in combination with table 3, the use of disodium lauryl sulfosuccinate in the present application is more effective than sodium ditridecyl sulfosuccinate and sodium stearate is more effective than sodium dodecylbenzenesulfonate, probably because the long carbon chain polymer is not conducive to the formation of fine particles with small particle size, and does not improve the microstructure of the concrete to improve the impermeability and wear resistance.

3. As can be seen from example 1 and comparative examples 1, 2, 3 and 4 in combination with table 3, the addition of disodium lauryl sulfosuccinate and glycidyl acrylate has a synergistic effect, which may be caused by that the disodium lauryl sulfosuccinate and glycidyl acrylate are mixed to obtain polymer particles with a small particle size under the action of sodium stearate, and hydrogen bonds are easily formed between carboxyl groups of the disodium lauryl sulfosuccinate and the glycidyl acrylate, so that a part of capillary pores and other voids in the concrete are filled after the concrete is hardened, thereby improving the impermeability and wear resistance of the concrete.

4. As can be seen from example 4 and examples 7 and 9 in combination with Table 3, the reaction of m-anilinomethylsulfide and 5-ureidohydantoin produces a synergistic effect which enhances the barrier and wear properties of the concrete.

5. As can be seen from examples 4 and 8 in combination with Table 3, 4-dimethylaminopyridine is more effective in catalyzing the reaction of m-anilinomethyl sulfide and 5-ureidohydantoin.

6. As can be seen from examples 4 and 10 in combination with table 3, the addition of trimethylhexane diisocyanate improves the impermeability and abrasion resistance of the concrete.

7. As can be seen from examples 4 and 11 in combination with table 3, the addition of molybdenum disulphide improves the wear resistance of the concrete and assists in improving the impermeability.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications to the present embodiment as necessary without inventive contribution after reading the present specification, but all are protected by patent law within the scope of the claims of the present application.

Claims

1. An impervious wear-resistant concrete, which is characterized in that: the concrete comprises the following raw materials in parts by weight:

200-350 parts of recycled concrete;

50-75 parts of slag powder;

50-75 parts of fly ash;

600-650 parts of crushed stone;

5-6 parts of straw;

4-5 parts disodium lauryl sulfosuccinate;

2-3 parts of glycidyl acrylate;

0.2-0.4 part of emulsifier.

2. The impervious wear-resistant concrete according to claim 1, wherein: the raw materials also comprise 4 to 5 parts of m-anilinomethyl sulfide, 2 to 3 parts of 5-ureidohydantoin and 0.1 to 0.2 part of 4-dimethylaminopyridine according to parts by weight.

3. The impervious wear-resistant concrete according to claim 2, wherein: the raw materials also comprise 0.8 to 1 portion of trimethyl hexane diisocyanate according to the weight portion.

4. The impervious wear-resistant concrete according to claim 1, wherein: the crushed stone is granite with 5-31.5mm continuous gradation.

5. The impervious wear-resistant concrete according to claim 4, wherein: the raw materials also comprise 10-15 parts of molybdenum disulfide by weight.

6. The impervious wear-resistant concrete according to claim 1, wherein: the emulsifier is sodium stearate.

7. A method of producing an impervious wear resistant concrete according to any one of claims 1 to 6 comprising the steps of:

8. The method for preparing impervious wear-resistant concrete according to claim 7, wherein the concrete is prepared by the following steps: in the step S1, molybdenum disulfide and crushed stone are added simultaneously; stirring disodium lauryl sulfosuccinate, epoxypropyl acrylate and an emulsifier for 30-50min, then adding trimethyl hexane diisocyanate, stirring for 10-15min, then adding m-anilinomethyl sulfide and 5-ureidohydantoin, heating to 40-50 ℃, dropwise adding 4-dimethylaminopyridine, and stirring for reacting for 1-1.5h to obtain the concrete raw material.