LU500650B1

LU500650B1 - Method for preparing building block with acid and alkali resistance

Info

Publication number: LU500650B1
Application number: LU500650A
Authority: LU
Inventors: Hongzhen Kang; Qingjuan Meng
Original assignee: Univ Tangshan
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2023-03-14

Abstract

The present disclosure discloses a method for preparing a block with acid and alkali resistance, mixing ceramsite, river sand, quicklime, and desulfurized gypsum to obtain mixed aggregate; Add powdered sodium silicate, sodium dodecylbenzene sulfonate and portland cement and foaming agent to mix well; after adding water and surface-modified fullerene suspension, mix well and mature, to obtain the mixed slurry; the mixed slurry into a mold, molding, pre-cultivating, demoulding, and cutting; freezing the cut blank; completely immersing in the acid and alkali resistant treatment solution at room temperature, taking it out, then dry and autoclave for curing and cooling for use. In the present disclosure, the hydrophilic fullerene derivative is added during the preparation process of the block and combined with the freezing treatment and the acid and alkali resistance treatment to finally achieve the super acid and alkali resistance effect.

Description

METHOD FOR PREPARING BUILDING BLOCK WITH ACID AND ALKALI ~~ -U500650

RESISTANCE

TECHNICAL FIELD

[01] The present disclosure relates to the technical field of building materials, in particular to a method for preparing a building block with acid and alkali resistance.

BACKGROUND ART

[02] Block is artificial blank used in masonry. It is novel wall material. Most shapes are right-angled hexahedrons, and there are also various special-shaped blocks. One or more of the length, width, or height of the primary specifications of the block series exceeds 365mm, 240mm or 115mm, respectively, but the block height is generally not more than 6 times the length or width, and the length is not more than 3 times the height.

[03] Due to the low density and high porosity of the block itself, the acid and alkali resistance of general blocks are very poor. In order to expand the application range of the block, the present disclosure provides a preparation method for a block with acid and alkali resistance.

SUMMARY

[04] In view of the technical problems existing in the background art, the present disclosure proposes a method for preparing a building block with acid and alkali resistance.

[05] The technical scheme of the present disclosure is as follows:

[06] A method for preparing a building block with super acid and alkali resistance, wherein it comprises the following steps:

[07] A. Mixing and grinding ceramsite, river sand, quicklime, and desulfurized gypsum, sieve to obtain mixed aggregate;

[08] B. Adding powdered sodium silicate and sodium dodecylbenzene sulfonate to the mixed aggregate for ball milling, and adding portland cement and foaming agent to stir;

[09] C. After adding water and the surface-modified fullerene suspension, stirring and mature to obtain a mixed slurry;

[10] D. Pouring the mixed slurry into a mold, molding, pre-cultivating, demoulding and cutting;

[11] E. Freezing the cut blanks at a temperature below -30°C for 8-12h;

[12] F. After placing the frozen blank at room temperature for 24 hours, completely immersing in acid and alkali resistant treatment solution for 3-5 minutes, taking out , drying and autoclaving at 100-120°C for curing and cooling.

[13] Preferably, the particle size of the mixed aggregate is 325 mesh.

[14] Preferably, the mixed slurry is composed of the following components by weight percentage:

[15] Ceramsite 5-8% 1

[16] River sand 12-15% LU500650

[17] Quicklime 8-15%

[18] Desulfurization gypsum 2-5%

[19] Powdered sodium silicate 3-8%

[20] Sodium dodecylbenzene sulfonate 2-5%

[21] Foaming agent 3-8%

[22] Portland cement 15-22%

[23] Surface modified fullerene suspension 2-5%

[24] Water for the rest.

[25] Preferably, the method for preparing a surface-modified fullerene suspension is made by the following steps: dissolving the surfactant in ethanol, adding the hydrophilic fullerene derivative, and sequentially performing mechanical stirring, ball milling, and ultrasonic reaction treatment to obtain.

[26] Preferably, the fullerene body of the hydrophilic fullerene derivative contains a carbon cage of 50 to 120 carbon atoms, the hydrophilic fullerene derivative contains 1 to 6 flexible ether oxygen chains, and the addition site of the methylene group on the fullerene is one of [5, 6] and [6, 6]; the structural formula is: © fullerence

[27]

[28] Wherein R 1 and R 2 are selected from a group consisting of phenyl, carbonyl, alkyl, aryl, substituted aryl and a mixture thereof;

[29] Wherein n is any number from 1 to 3.

[30] Preferably, the acid and alkali resistance treatment solution is composed of the following components by weight percentage: natural latex 10-15%, ethylene glycol 15-25%, antimony trioxide 0.1-0.15%, ethyl orthosilicate 0.2-0.5%, polynaphthalene formaldehyde sulfonate sodium salt 0.3-0.5%, ethyl acetate 15-25% and water for the rest.

[31] The advantages of the present disclosure are: In the present disclosure, the hydrophilic fullerene derivative is added during the preparation process of the block and combined with the freezing treatment and the acid and alkali resistance treatment to finally achieve the super acid and alkali resistance effect.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[32] Example 1

[33] A method for preparing a building block with acid and alkali resistance, wherein 2 it comprises the following steps: LU500650

[34] A. Mixing and grinding ceramsite, river sand, quicklime, and desulfurized gypsum, sieve to obtain mixed aggregate;

[35] B. Adding powdered sodium silicate and sodium dodecylbenzene sulfonate to the mixed aggregate for ball milling, and adding portland cement and foaming agent to stir;

[36] C. After adding water and the surface-modified fullerene suspension, stirring and mature to obtain a mixed slurry;

[37] D. Pouring the mixed slurry into a mold, molding, pre-cultivating, demoulding and cutting;

[38] E. Freezing the cut blanks at a temperature below -35°C for 10h;

[39] F. After placing the frozen blank at room temperature for 24 hours, completely immersing in acid and alkali resistant treatment solution for 3.5 minutes, taking out , drying and autoclaving at 105 °C for curing and cooling

[40] The particle size of the mixed aggregate is 325 mesh.

[41] The mixed slurry is composed of the following components by weight percentage:

[42] Ceramsite7%

[43] River sand 13%

[44] Quicklime 12%

[45] Desulfurization gypsum 3%

[46] Powdered sodium silicate 5%

[47] Sodium dodecylbenzene sulfonate 3.5%

[48] Foaming agent 5.5%

[49] Portland cement 18%

[50] Surface modified fullerene suspension 2.8%

[51] Water for the rest. [S2] The method for preparing a surface-modified fullerene suspension is made by the following steps: add 800 parts by mass of ethanol, 12 parts of polyethylene glycol, 18 parts of sodium dodecyl sulfate and 3 parts of hydrophilic fullerene derivatives, and sequentially performing mechanical stirring, ball milling, and ultrasonic reaction treatment to obtain. [S3] The fullerene body of the hydrophilic fullerene derivative contains a carbon cage of 50 to 120 carbon atoms, the hydrophilic fullerene derivative contains 1 to 6 flexible ether oxygen chains, and the addition site of the methylene group on the fullerene is one of [5, 6] and [6, 6]; the structural formula is: 3

[54] [S5] Wherein R 1 and R 2 are selected from a group consisting of phenyl, carbonyl, alkyl, aryl, substituted aryl and a mixture thereof; [S6] Wherein n is any number from 1 to 3. [S7] The acid and alkali resistance treatment solution is composed of the following components by weight percentage: natural latex 12%, ethylene glycol 18%, antimony trioxide 0.12%, ethyl orthosilicate 0.3%, polynaphthalene formaldehyde sulfonate sodium salt 0.35%, ethyl acetate 20% and water for the rest. [S8] Example 2

[59] A method for preparing a building block with acid and alkali resistance, wherein it comprises the following steps:

[60] A. Mixing and grinding ceramsite, river sand, quicklime, and desulfurized gypsum, sieve to obtain mixed aggregate;

[61] B. Adding powdered sodium silicate and sodium dodecylbenzene sulfonate to the mixed aggregate for ball milling, and adding portland cement and foaming agent to stir;

[62] C. After adding water and the surface-modified fullerene suspension, stirring and mature to obtain a mixed slurry;

[63] D. Pouring the mixed slurry into a mold, molding, pre-cultivating, demoulding and cutting;

[64] E. Freezing the cut blanks at a temperature below -32°C for 12h;

[65] F. After placing the frozen blank at room temperature for 24 hours, completely immersing in acid and alkali resistant treatment solution for 3 minutes, taking out, drying and autoclaving at 120°C for curing and cooling for.

[66] The particle size of the mixed aggregate is 325 mesh.

[67] The mixed slurry is composed of the following components by weight percentage:

[68] Ceramsite 5%

[69] River sand 15%

[70] Quicklime 8%

[71] Desulfurization gypsum 5%

[72] Powdered sodium silicate 3%

[73] Sodium dodecylbenzene sulfonate 5%

[74] Foaming agent 3% 4

[75] Portland cement 22% LU500650

[76] Surface modified fullerene suspension 2%

[77] Water for the rest.

[78] The method for preparing a surface-modified fullerene suspension is made by the following steps: add 800 parts by mass of ethanol, 12 parts of polyethylene glycol, 25 parts of sodium dodecyl sulfate and 5 parts of hydrophilic fullerene derivatives, and sequentially performing mechanical stirring, ball milling, and ultrasonic reaction treatment to obtain.

[79] The fullerene body of the hydrophilic fullerene derivative contains a carbon cage of 50 to 120 carbon atoms, the hydrophilic fullerene derivative contains 1 to 6 flexible ether oxygen chains, and the addition site of the methylene group on the fullerene is one of [5, 6] and [6, 6]; the structural formula is:

À pa oY nRito PE 3

[80]

[81] Wherein R 1 and R 2 are selected from a group consisting of phenyl, carbonyl, alkyl, aryl, substituted aryl and a mixture thereof;

[82] Wherein n is any number from 1 to 3.

[83] The acid and alkali resistance treatment solution is composed of the following components by weight percentage: natural latex 15%, ethylene glycol 15%, antimony trioxide 0.15%, ethyl orthosilicate 0.2%, polynaphthalene formaldehyde sulfonate sodium salt 0.5%, ethyl acetate 15% and water for the rest.

[84] Example 3

[85] A method for preparing a building block with acid and alkali resistance, wherein it comprises the following steps:

[86] A. Mixing and grinding ceramsite, river sand, quicklime, and desulfurized gypsum, sieve to obtain mixed aggregate;

[87] B. Adding powdered sodium silicate and sodium dodecylbenzene sulfonate to the mixed aggregate for ball milling, and adding portland cement and foaming agent to stir;

[88] C. After adding water and the surface-modified fullerene suspension, stirring and mature to obtain a mixed slurry;

[89] D. Pouring the mixed slurry into a mold, molding, pre-cultivating, demoulding and cutting;

[90] E. Freezing the cut blanks at a temperature below -38°C for 8h;

[91] F. After placing the frozen blank at room temperature for 24 hours, completely immersing in acid and alkali resistant treatment solution for 5 minutes, taking out , LUS00650 drying and autoclaving at 100°C for curing and cooling for use.

[92] The particle size of the mixed aggregate is 325 mesh.

[93] The mixed slurry is composed of the following components by weight percentage:

[94] Ceramsite 8%

[95] River sand 12%

[96] Quicklime 15%

[97] Desulfurization gypsum 2%

[98] Powdered sodium silicate 8%

[99] Sodium dodecylbenzene sulfonate 2%

[100] Foaming agent 8%

[101] Portland cement 15%

[102] Surface modified fullerene suspension 5%

[103] Water for the rest.

[104] The method for preparing a surface-modified fullerene suspension is made by the following steps: add 800 parts by mass of ethanol, 18 parts of polyethylene glycol, parts of sodium dodecyl sulfate and 6 parts of hydrophilic fullerene derivatives, and sequentially performing mechanical stirring, ball milling, and ultrasonic reaction treatment to obtain.

The fullerene body of the hydrophilic fullerene derivative contains a carbon cage of 50 to 120 carbon atoms, the hydrophilic fullerene derivative contains 1 to 6 flexible ether oxygen chains, and the addition site of the methylene group on the fullerene is one of [5, 6] and [6, 6]; the structural formula is: de a EN OR Re ay Te Wo ag 23 i fullerence

[105] Wherein R 1 and R 2 are selected from a group consisting of phenyl, carbonyl, alkyl, aryl, substituted aryl and a mixture thereof;

[106] Wherein n is any number from 1 to 3.

[107] The acid and alkali resistance treatment solution is composed of the following components by weight percentage: natural latex 10%, ethylene glycol 25%, antimony trioxide 0.1%, ethyl orthosilicate 0.5%, polynaphthalene formaldehyde sulfonate sodium salt 0.3%, ethyl acetate 25% and water for the rest.

[108] Comparative example 1 6

[109] The hydrophilic fullerene derivative in Example 1 was substituted with LU500650 fullerene C60 of equal mass, and the rest ratio and preparation method were unchanged.

[110] Comparative example 2

[111] The hydrophilic fullerene derivative in Example 1 was substituted with graphene oxide of equal mass, and the rest of the ratio and preparation method were unchanged.

[112] Comparative example 3

[113] The treatment step of the acid and alkali resistant treatment solution in Example 1 is removed, and the remaining proportions and preparation methods remain unchanged.

[114] Comparative example 4

[115] The antimony trioxide in the acid and alkali resistant treatment solution in

Example 1 was substituted with cerium oxide of equal quality, and the remaining proportions and preparation methods were unchanged.

[116] Comparative example 5

[117] The antimony trioxide in the acid and alkali resistant treatment solution in

Example 1 was substituted with zinc oxide of equal mass, and the remaining proportions and preparation methods were unchanged.

[118] In the following, the blocks prepared in Examples 1-3 and Comparative

Examples 1-5 were tested for acid and alkali resistance, and the following test results were obtained. The specific test results are shown in Table 1.

[119] Detection method: The blocks prepared in Examples 1-3 and Comparative

Examples 1-5 of the present disclosure were cut into cubes of 100mm>100mmx 100mm, respectively, and immersed in acid and alkali liquids for performance testing.

[120] Table 1: Test results of acid and alkali resistance of the blocks prepared in

Examples 1-3 and Comparative Examples 1-5;

Resistant to 20% | Resistant to 30% sodium hydrochloric acid solution | hydroxide solution (70 °C , (70°C, 96h) 96h)

[121] Remark:

[122] The non-corrosion phenomenon means that the block has no obvious change in the liquid, and it is taken out and dried at room temperature until the water content is 10%, and the weighing mass loss is less than 1%.

[123] Obvious corrosion means that the volume of the block in the liquid is obviously smaller, and the block is taken out and dried at room temperature to a water content of 7

10%, and the weighing mass loss is < 5%. LU500650

[124] Severe corrosion means that the volume of the block in the liquid is obviously reduced, and it is taken out and dried at room temperature to a water content of 10%, and the weighing mass loss is >5%.

[125] It can be known from the above test data that the block prepared by the method of the present disclosure has super acid and alkali resistance. 8

Claims

WHAT IS CLAIMED IS: LUS00650

1. A method for preparing a building block with acid and alkali resistance, wherein it comprises the following steps:

A. Mixing and grinding ceramsite, river sand, quicklime, and desulfurized gypsum, sieve to obtain mixed aggregate;

B. Adding powdered sodium silicate and sodium dodecylbenzene sulfonate to the mixed aggregate for ball milling, and adding portland cement and foaming agent to stir ;

C. After adding water and the surface-modified fullerene suspension, stirring and mature to obtain a mixed slurry;

D. Pouring the mixed slurry into a mold, molding, pre-cultivating, demoulding, and cutting;

E. Freezing the cut blanks at a temperature below -30°C for 8-12h;

F. After placing the frozen blank at room temperature for 24 hours, completely immersing in acid and alkali resistant treatment solution for 3-5 minutes, taking out , drying and autoclaving at 100-120°C for curing and cooling; the mixed slurry is composed of the following components by weight percentage: Ceramsite 5-8% River sand 12-15% Quicklime 8-15% Desulfurization gypsum 2-5% Powdered sodium silicate 3-8% Sodium dodecylbenzene sulfonate 2-5% Foaming agent 3-8% Portland cement 15-22% Surface modified fullerene suspension 2-5% Water for the rest; the main components of the acid and alkali resistance treatment solution are: natural latex, ethylene glycol, antimony trioxide, ethyl orthosilicate, sodium polynaphthalene formaldehyde sulfonate, ethyl acetate and water. the method for preparing a surface-modified fullerene suspension is made by the following steps: dissolving the surfactant in ethanol, adding the hydrophilic fullerene derivative, and sequentially performing mechanical stirring, ball milling, and ultrasonic reaction treatment to obtain.

2 The method according to claim 1, wherein the fullerene body of the hydrophilic fullerene derivative contains a carbon cage of 50 to 120 carbon atoms, the hydrophilic fullerene derivative contains 1 to 6 flexible ether oxygen chains, and the addition site of the methylene group on the fullerene is one of [5, 6] and [6, 6]; the structural formula is: 1

XN ni : ss Ere xx.

No NL a Me Qs Sn : La SE +, i fullerence Wherein R 1 and R 2 are selected from a group consisting of phenyl, carbonyl, alkyl, aryl, substituted aryl and a mixture thereof; Wherein n is any number from 1 to 3. 2