Lightweight aggregate concrete and preparation method thereof

Abstract

The invention relates to the field of building materials, and particularly discloses lightweight aggregate concrete and a preparation method thereof. The lightweight aggregate concrete is prepared from the following raw materials in parts by weight: cement, an admixture, machine-made sand, stone powder, surface modified ceramsite, fine stone, polytetrafluoroethylene fibers, water and a water reducing agent, the surface modified ceramsite is obtained by performing surface modification on ceramsite through fireproof resin and potassium perfluorobutanesulfonate; the preparation method comprises the following steps: mixing and stirring the cement, the admixture, the machine-made sand, the stone powder and the fine stone to obtain a solid mixture; adding the rest raw materials except the surface modified ceramsite and the polytetrafluoroethylene fiber into the solid mixture, and stirring to obtain concrete slurry; and adding the surface modified ceramsite and polytetrafluoroethylene fiber into the concrete slurry, and stirring to obtain the concrete. According to the lightweight aggregate concrete disclosed by the invention, the high-temperature resistance of the concrete is improved; according to the preparation method, the possibility that an organic film on the surface of the surface modified ceramsite is abraded is reduced.

Description

technical field

[0001] The application relates to the field of building materials, more specifically, it relates to a lightweight aggregate concrete and a preparation method thereof. Background technique

[0002] River sand is a kind of non-metallic ore with high impurity content, which is produced by repeated collision and friction of natural stone under the force of water for a long time. . But at present, mineral resources are lacking, so the purchase of river sand is restricted.

[0003] In order to maintain the normal production of concrete, the stone powder obtained by crushing the waste rock in the quarry is used to replace part of the river sand as the raw material for the preparation of concrete. In this way, the use of stone powder can not only maintain the normal production of concrete, but also meet the purpose of saving resources and reducing environmental pollution .

[0004] At present, the fire problem of building structures is becoming more and more promi...

Examples

preparation example 1

[0049] A preparation method of surface modified ceramsite, comprising the following steps:

[0050] Ceramsite surface treatment: Mix 5kg of silane coupling agent, 45g of water and 50kg of absolute ethanol to obtain mixed solution A, heat mixed solution A to 55°C and stir for 20 minutes, then let it stand for 0.5h; then add 55kg of clay pottery to mixed solution A granules, soaked for 30min to obtain pretreated ceramsite;

[0051] Coating preparation: Add 1 kg of potassium perfluorobutane sulfonate to 80 kg of polyurethane resin while stirring to obtain mixed solution B;

[0052] Preparation of surface-modified ceramsite: Add pretreated ceramsite and 40kg of T-31 modified amine to the mixed solution B sequentially while stirring, keep stirring for 10 minutes and then let it stand for 28 hours to obtain surface-modified ceramsite.

preparation example 2

[0054] A preparation method of surface modified ceramsite, comprising the following steps:

[0055] Surface treatment of ceramsite: Mix 8kg of silane coupling agent, 72g of water and 80kg of absolute ethanol to obtain mixed solution A, heat mixed solution A to 60°C and stir for 25 minutes, then let it stand for 1 hour; then add 75kg of shale pottery to mixed solution A Granules, soaked for 45min to obtain pretreated ceramsite;

[0056] Coating preparation: Add 2kg of potassium perfluorobutanesulfonate to 110kg of epoxy resin while stirring to obtain mixed solution B;

[0057] Preparation of surface-modified ceramsite: Add pretreated ceramsite and 50kg of T-31 modified amine to the mixed solution B sequentially while stirring, keep stirring for 15 minutes and then let stand for 36 hours to obtain surface-modified ceramsite.

preparation example 3

[0059] A preparation method of surface modified ceramsite, comprising the following steps:

[0060] Surface treatment of ceramsite: Mix 6kg of silane coupling agent, 54g of water and 60kg of absolute ethanol to obtain mixed solution A, heat the mixed solution A to 60°C and stir for 25min, then let it stand for 1h; then add 65kg of clay ceramsite to the mixed solution A , to obtain pretreated ceramsite after soaking for 40 minutes;

[0061] Coating preparation: Add 2 kg of potassium perfluorobutanesulfonate to 100 kg of acrylic resin while stirring to obtain a mixed solution B;

[0062] Preparation of surface-modified ceramsite: Add pretreated ceramsite and 45kg of T-31 modified amine to the mixed solution B sequentially while stirring, keep stirring for 15 minutes and then stand still for 32 hours to obtain surface-modified ceramsite.

technical field

[0001] The application relates to the field of building materials, more specifically, it relates to a lightweight aggregate concrete and a preparation method thereof. Background technique

[0002] River sand is a kind of non-metallic ore with high impurity content, which is produced by repeated collision and friction of natural stone under the force of water for a long time. . But at present, mineral resources are lacking, so the purchase of river sand is restricted.

[0003] In order to maintain the normal production of concrete, the stone powder obtained by crushing the waste rock in the quarry is used to replace part of the river sand as the raw material for the preparation of concrete. In this way, the use of stone powder can not only maintain the normal production of concrete, but also meet the purpose of saving resources and reducing environmental pollution .

[0004] At present, the fire problem of building structures is becoming more and more promi...

Examples

preparation example 1

[0049] A preparation method of surface modified ceramsite, comprising the following steps:

[0050] Ceramsite surface treatment: Mix 5kg of silane coupling agent, 45g of water and 50kg of absolute ethanol to obtain mixed solution A, heat mixed solution A to 55°C and stir for 20 minutes, then let it stand for 0.5h; then add 55kg of clay pottery to mixed solution A granules, soaked for 30min to obtain pretreated ceramsite;

[0051] Coating preparation: Add 1 kg of potassium perfluorobutane sulfonate to 80 kg of polyurethane resin while stirring to obtain mixed solution B;

[0052] Preparation of surface-modified ceramsite: Add pretreated ceramsite and 40kg of T-31 modified amine to the mixed solution B sequentially while stirring, keep stirring for 10 minutes and then let it stand for 28 hours to obtain surface-modified ceramsite.

preparation example 2

[0054] A preparation method of surface modified ceramsite, comprising the following steps:

[0055] Surface treatment of ceramsite: Mix 8kg of silane coupling agent, 72g of water and 80kg of absolute ethanol to obtain mixed solution A, heat mixed solution A to 60°C and stir for 25 minutes, then let it stand for 1 hour; then add 75kg of shale pottery to mixed solution A Granules, soaked for 45min to obtain pretreated ceramsite;

[0056] Coating preparation: Add 2kg of potassium perfluorobutanesulfonate to 110kg of epoxy resin while stirring to obtain mixed solution B;

[0057] Preparation of surface-modified ceramsite: Add pretreated ceramsite and 50kg of T-31 modified amine to the mixed solution B sequentially while stirring, keep stirring for 15 minutes and then let stand for 36 hours to obtain surface-modified ceramsite.

preparation example 3

[0059] A preparation method of surface modified ceramsite, comprising the following steps:

[0060] Surface treatment of ceramsite: Mix 6kg of silane coupling agent, 54g of water and 60kg of absolute ethanol to obtain mixed solution A, heat the mixed solution A to 60°C and stir for 25min, then let it stand for 1h; then add 65kg of clay ceramsite to the mixed solution A , to obtain pretreated ceramsite after soaking for 40 minutes;

[0061] Coating preparation: Add 2 kg of potassium perfluorobutanesulfonate to 100 kg of acrylic resin while stirring to obtain a mixed solution B;

[0062] Preparation of surface-modified ceramsite: Add pretreated ceramsite and 45kg of T-31 modified amine to the mixed solution B sequentially while stirring, keep stirring for 15 minutes and then stand still for 32 hours to obtain surface-modified ceramsite.

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