Concrete anti-cracking reinforcing addictive and preparation method thereof

Abstract

Provided are a concrete anti-cracking reinforcing addictive and a preparation method thereof. The concrete anti-cracking reinforcing addictive is prepared from anhydrous rho aluminium oxide, metal aluminum powder, modified short polyester fiber, anhydrous calcined kaolin and calcium oxide powder, the preparation method comprises the steps that the measured anhydrous calcined kaolin and the calciumoxide powder are mixed evenly, and placed into a packaging bag together with the modified short polyester fiber for mixed package, separate sealed package is carried out on the measured anhydrous rhoaluminium oxide, separate sealed package is carried out on the measured metal aluminium powder, and the three packages are placed into one wrappage to be packaged into a finished product; the use steps comprises the mixture of the anhydrous rho aluminium oxide, anhydrous calcined kaolin, calcium oxide powder and modified short polyester fiber is quickly evenly mixed, and added into concrete containing water after being stirred evenly, the metal aluminium powder is placed into a nonmetallic container, water is added, and after being stirred, the metal aluminium powder and the water are added together into the concrete for stirring.

Description

technical field

[0001] The invention relates to an additive for concrete anti-cracking enhancement and a preparation method thereof, belonging to the technical field of building materials. Background technique

[0002] Concrete is the most commonly used silicate building material. Cracks often appear in concrete due to its own performance during use, resulting in problems such as strength reduction, cracking and leakage of concrete pouring structures that seriously affect the quality of construction. The reason for the cracks in concrete, in addition to the material and water quality, is the key to the energy change of the grain structure produced by the crystallization process. Cement is clinker mainly composed of tricalcium silicate (3CaO SiO 2 ), dicalcium silicate (β-2CaO SiO 2 ), tricalcium aluminate (3CaO·Al 2 o 3 ) and tetracalcium aluminoferrite (4CaO·Al2O 3 · Fe2O2 3 ) composed of four minerals. The initial hydration process is an energy-absorbing process, for...

Examples

example 1

[0016] Take 200g of anhydrous calcined kaolin with a purity > 75% and a particle size ranging from 30 μm to 75 μm, 200 g of calcium oxide with a particle size between 5 μm and 15 μm, a short polymer with a length of 4-12 cm, a diameter of 15 μm, and a surface layer modified with alkyl aluminum. Ester fiber 300g, the three are mixed evenly and then packed. Take 400 g of anhydrous rho-alumina with a particle size of 99.2%, which is individually sealed and packaged for use.

[0017] Take 1m 3 Mixing of Portland cement in concrete. The mixture of anhydrous rho alumina, anhydrous calcined kaolin, calcium oxide powder, and modified short polyester fiber is quickly stirred evenly, and the stirring process is kept dry. After stirring evenly, add the mixture evenly into the stirring 1m 3 In the concrete, and keep stirring evenly. Add metal aluminum powder gradually to 2L of 50°C clear water, and stir while adding. After adding, add the mixture of metal aluminum powder and water eve...

example 2

[0019] Take 200g of anhydrous calcined kaolin with a purity > 75% and a particle size range between 40 μm and 60 μm, 250 g of calcium oxide with a particle size between 10 μm and 15 μm, and a short polymer with a length of 6-10 cm and a diameter of 10 μm. Ester fiber 300g, the three are mixed evenly and then packed. Take 400 g of anhydrous rho-alumina with a particle size of 99.2%, individually sealed and packaged for use.

[0020] Take 1m 3 Mixing of concrete with aluminosilicate cement. The mixture of anhydrous rho alumina, anhydrous calcined kaolin, calcium oxide powder, and modified short polyester fiber is quickly stirred evenly, and the stirring process is kept dry. After stirring evenly, add the mixture evenly into the stirring 1m 3 In the concrete, and keep stirring evenly. Add metal aluminum powder gradually to 2L of 60°C clear water, and stir while adding. After adding, add the mixture of metal aluminum powder and water evenly to the concrete being stirred, and ...

technical field

[0001] The invention relates to an additive for concrete anti-cracking enhancement and a preparation method thereof, belonging to the technical field of building materials. Background technique

[0002] Concrete is the most commonly used silicate building material. Cracks often appear in concrete due to its own performance during use, resulting in problems such as strength reduction, cracking and leakage of concrete pouring structures that seriously affect the quality of construction. The reason for the cracks in concrete, in addition to the material and water quality, is the key to the energy change of the grain structure produced by the crystallization process. Cement is clinker mainly composed of tricalcium silicate (3CaO SiO 2 ), dicalcium silicate (β-2CaO SiO 2 ), tricalcium aluminate (3CaO·Al 2 o 3 ) and tetracalcium aluminoferrite (4CaO·Al2O 3 · Fe2O2 3 ) composed of four minerals. The initial hydration process is an energy-absorbing process, for...

Examples

example 1

[0016] Take 200g of anhydrous calcined kaolin with a purity > 75% and a particle size ranging from 30 μm to 75 μm, 200 g of calcium oxide with a particle size between 5 μm and 15 μm, a short polymer with a length of 4-12 cm, a diameter of 15 μm, and a surface layer modified with alkyl aluminum. Ester fiber 300g, the three are mixed evenly and then packed. Take 400 g of anhydrous rho-alumina with a particle size of 99.2%, which is individually sealed and packaged for use.

[0017] Take 1m 3 Mixing of Portland cement in concrete. The mixture of anhydrous rho alumina, anhydrous calcined kaolin, calcium oxide powder, and modified short polyester fiber is quickly stirred evenly, and the stirring process is kept dry. After stirring evenly, add the mixture evenly into the stirring 1m 3 In the concrete, and keep stirring evenly. Add metal aluminum powder gradually to 2L of 50°C clear water, and stir while adding. After adding, add the mixture of metal aluminum powder and water eve...

example 2

[0019] Take 200g of anhydrous calcined kaolin with a purity > 75% and a particle size range between 40 μm and 60 μm, 250 g of calcium oxide with a particle size between 10 μm and 15 μm, and a short polymer with a length of 6-10 cm and a diameter of 10 μm. Ester fiber 300g, the three are mixed evenly and then packed. Take 400 g of anhydrous rho-alumina with a particle size of 99.2%, individually sealed and packaged for use.

[0020] Take 1m 3 Mixing of concrete with aluminosilicate cement. The mixture of anhydrous rho alumina, anhydrous calcined kaolin, calcium oxide powder, and modified short polyester fiber is quickly stirred evenly, and the stirring process is kept dry. After stirring evenly, add the mixture evenly into the stirring 1m 3 In the concrete, and keep stirring evenly. Add metal aluminum powder gradually to 2L of 60°C clear water, and stir while adding. After adding, add the mixture of metal aluminum powder and water evenly to the concrete being stirred, and ...