Method for preparing foam cement by utilizing fly ash ceramsite as lightweight aggregate

Abstract

The invention relates to a method for preparing foam cement by utilizing fly ash ceramsite as lightweight aggregate. The specific process is as follows: step a), adding sodium carboxymethyl cellulose into water and dissolving to obtain sodium carboxymethyl cellulose water solution; step b), adding polyvinyl alcohol solution into the solution, uniformly stirring, then sequentially adding fly ash ceramsite and mixture while stirring, uniformly stirring, finally adding hydrogen peroxide into slurry which is mixed uniformly, fast stirring, placing into a mold, hardening and molding, performing final setting, demolding and performing indoor moisturizing spray or covering a film for curing till a testing period so as to obtain fly ash ceramsite foam cement. According to the method, by adding sodium carboxymethyl cellulose, a weak area between aggregate and cement slurry is improved, the bonding strength is improved, the mechanical properties and the durability of foam cement are significantly improved and the floating problem of ceramsite is solved.

Description

technical field

[0001] The invention relates to the field of building materials, in particular to a method for preparing foamed cement by using fly ash ceramsite as lightweight aggregate. Background technique

[0002] Ceramsite has the characteristics of light bulk density, high strength, low thermal conductivity, fire resistance, impermeability, sound absorption, and good chemical stability. It can replace ordinary sand and gravel to prepare light aggregate foamed cement. At present, ceramsite is mainly made of clay through sintering, and most of the source of clay raw material comes from cultivated land, resulting in unreasonable utilization of cultivated land resources. Therefore, it is technically necessary to use other methods to make cement .

[0003] In view of the above-mentioned defects, the author of the present invention has finally obtained this creation through long-term research and practice. Contents of the invention

[0004] The object of the present inve...

Examples

Embodiment 1

[0026] Step a11, adding 0.5 g of sodium carboxymethyl cellulose to 110 mL of water, and standing still to fully dissolve the sodium carboxymethyl cellulose into the water to obtain an aqueous solution of sodium carboxymethyl cellulose;

[0027] Step b11, add 1.2g of 10% polyvinyl alcohol solution to the above solution, stir evenly, then, while stirring, add 100g of fly ash ceramsite and a mixture successively, the mixture includes 240g of cement, two Manganese oxide 0.2g, naphthalene-based water reducer 0.3g, stir evenly, finally, add 15mL hydrogen peroxide with a concentration of 30% to the uniformly mixed slurry, stir rapidly for 15s, put into the mold, harden and form, and finally set after 1 day, Remove the mold, spray water indoors or cover with a film to keep it moist for 28 days to the test age, and then get the fly ash ceramsite foamed cement.

[0028] Wherein, in the described step b12, the mass ratio of polyvinyl alcohol solution (10%) and carboxymethyl cellulose in ...

Embodiment 2

[0030] Step a21, adding 0.5 g of sodium carboxymethyl cellulose into 115 mL of water, and standing still to fully dissolve the sodium carboxymethyl cellulose into the water to obtain an aqueous solution of sodium carboxymethyl cellulose;

[0031] Step b21, add 1.3g of 10% polyvinyl alcohol solution to the above solution, stir evenly, then, while stirring, add 100g of fly ash ceramsite and mixture successively, the mixture includes 240g of cement, two Manganese oxide 0.2g, naphthalene-based water reducer 0.3g, stir evenly, finally, add 15mL hydrogen peroxide with a concentration of 30% to the uniformly mixed slurry, stir rapidly for 15s, put into the mold, harden and form, and finally set after 1 day, Remove the mold, spray water indoors or cover it with a film for 28 days to the test age, and then get the fly ash ceramsite foamed cement.

[0032] Wherein, the mass ratio of the 10% polyvinyl alcohol solution in the described step b21 to the sodium carboxymethyl cellulose in the...

Embodiment 3

[0034] In step a31, add 0.5 g of sodium carboxymethyl cellulose to 105 mL of water, and let the sodium carboxymethyl cellulose fully dissolve in the water to obtain an aqueous solution of sodium carboxymethyl cellulose;

[0035] Step b31, add 1.4g of 10% polyvinyl alcohol solution to the above solution, stir evenly, and then, while stirring, add 100g of shale ceramsite and mixture successively, the mixture includes 220g of cement, carbon dioxide Manganese 0.2g, naphthalene-based water reducer 0.3g, stir evenly, finally, add 15mL hydrogen peroxide with a concentration of 30% to the uniformly mixed slurry, stir rapidly for 15s, put into the mold, harden and form, final set after 1 day, remove Moisturizing and spraying water indoors or covering with film for curing for 28 days to the test age to obtain shale ceramsite foamed cement.

[0036] Wherein, the mass ratio of the 10% polyvinyl alcohol solution in the step b31 to the sodium carboxymethyl cellulose in the sodium carboxymet...

technical field

[0001] The invention relates to the field of building materials, in particular to a method for preparing foamed cement by using fly ash ceramsite as lightweight aggregate. Background technique

[0002] Ceramsite has the characteristics of light bulk density, high strength, low thermal conductivity, fire resistance, impermeability, sound absorption, and good chemical stability. It can replace ordinary sand and gravel to prepare light aggregate foamed cement. At present, ceramsite is mainly made of clay through sintering, and most of the source of clay raw material comes from cultivated land, resulting in unreasonable utilization of cultivated land resources. Therefore, it is technically necessary to use other methods to make cement .

[0003] In view of the above-mentioned defects, the author of the present invention has finally obtained this creation through long-term research and practice. Contents of the invention

[0004] The object of the present inve...

Examples

Embodiment 1

[0026] Step a11, adding 0.5 g of sodium carboxymethyl cellulose to 110 mL of water, and standing still to fully dissolve the sodium carboxymethyl cellulose into the water to obtain an aqueous solution of sodium carboxymethyl cellulose;

[0027] Step b11, add 1.2g of 10% polyvinyl alcohol solution to the above solution, stir evenly, then, while stirring, add 100g of fly ash ceramsite and a mixture successively, the mixture includes 240g of cement, two Manganese oxide 0.2g, naphthalene-based water reducer 0.3g, stir evenly, finally, add 15mL hydrogen peroxide with a concentration of 30% to the uniformly mixed slurry, stir rapidly for 15s, put into the mold, harden and form, and finally set after 1 day, Remove the mold, spray water indoors or cover with a film to keep it moist for 28 days to the test age, and then get the fly ash ceramsite foamed cement.

[0028] Wherein, in the described step b12, the mass ratio of polyvinyl alcohol solution (10%) and carboxymethyl cellulose in ...

Embodiment 2

[0030] Step a21, adding 0.5 g of sodium carboxymethyl cellulose into 115 mL of water, and standing still to fully dissolve the sodium carboxymethyl cellulose into the water to obtain an aqueous solution of sodium carboxymethyl cellulose;

[0031] Step b21, add 1.3g of 10% polyvinyl alcohol solution to the above solution, stir evenly, then, while stirring, add 100g of fly ash ceramsite and mixture successively, the mixture includes 240g of cement, two Manganese oxide 0.2g, naphthalene-based water reducer 0.3g, stir evenly, finally, add 15mL hydrogen peroxide with a concentration of 30% to the uniformly mixed slurry, stir rapidly for 15s, put into the mold, harden and form, and finally set after 1 day, Remove the mold, spray water indoors or cover it with a film for 28 days to the test age, and then get the fly ash ceramsite foamed cement.

[0032] Wherein, the mass ratio of the 10% polyvinyl alcohol solution in the described step b21 to the sodium carboxymethyl cellulose in the...

Embodiment 3

[0034] In step a31, add 0.5 g of sodium carboxymethyl cellulose to 105 mL of water, and let the sodium carboxymethyl cellulose fully dissolve in the water to obtain an aqueous solution of sodium carboxymethyl cellulose;

[0035] Step b31, add 1.4g of 10% polyvinyl alcohol solution to the above solution, stir evenly, and then, while stirring, add 100g of shale ceramsite and mixture successively, the mixture includes 220g of cement, carbon dioxide Manganese 0.2g, naphthalene-based water reducer 0.3g, stir evenly, finally, add 15mL hydrogen peroxide with a concentration of 30% to the uniformly mixed slurry, stir rapidly for 15s, put into the mold, harden and form, final set after 1 day, remove Moisturizing and spraying water indoors or covering with film for curing for 28 days to the test age to obtain shale ceramsite foamed cement.

[0036] Wherein, the mass ratio of the 10% polyvinyl alcohol solution in the step b31 to the sodium carboxymethyl cellulose in the sodium carboxymet...

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