Modification treatment method for coal ash for concrete

[0025] A modification treatment method of fly ash for concrete, comprising the following steps:

[0026] S1: Add fly ash to a ball mill, crush to 60 mesh, and sieve to obtain fly ash fine powder;

[0027] S2: Add the above-mentioned fly ash fine powder into a sodium phosphate solution with a mass concentration of 8% to soak, then wash the fly ash with water for 3 times, and dry the fly ash fine powder;

[0028] S3: Add the fly ash fine powder dried in step S2 into the mixer, heat to 60°C, add a mixed modifier with a weight of 3% of the fly ash and stir for 15 minutes at a stirring speed of 500r / min, The mixed modifier is composed of maleic rosin octylphenol polyoxyethylene ether diester carboxylate sodium and lauryl polyoxyethylene ether methyl silane with a mass ratio of 1:2, discharged and dried to complete Modification of fly ash.

[0030] A modification treatment method of fly ash for concrete, comprising the following steps:

[0031] S1: Add fly ash to a ball mill, crush to 40 mesh, and sieve to obtain fly ash fine powder;

[0032] S2: Add the above-mentioned fly ash fine powder into a sodium phosphate solution with a mass concentration of 10% to soak, then wash the fly ash with water for 4 times, and dry the fly ash fine powder;

[0033] S3: Add the fly ash fine powder dried in step S2 into the mixer, heat to 70°C, add a mixed modifier with a weight of 1.5% of the fly ash and stir for 10 minutes while stirring at a speed of 800r / min, The mixed modifying agent is composed of maleic rosin octylphenol polyoxyethylene ether diester carboxylate sodium and stearyl polyoxyethylene ether methyl silane with a mass ratio of 1:1, discharged, dried, and then Complete the modification of fly ash.

[0035] A modification treatment method of fly ash for concrete, comprising the following steps:

[0036] S1: Add fly ash to a ball mill, crush to 100 mesh, and sieve to obtain fly ash fine powder;

[0037] S2: Add the above-mentioned fly ash fine powder into a sodium phosphate solution with a mass concentration of 5% to soak, then wash the fly ash with water for 2 times, and dry the fly ash fine powder;

[0038] S3: Add the fly ash fine powder dried in step S2 into the mixer, heat to 60°C, add a mixed modifier with a weight of 3.0% of the fly ash and stir for 20 minutes while stirring at a speed of 1000r / min, The mixed modifying agent is composed of maleic rosin octylphenol polyoxyethylene ether diester carboxylate sodium and lauryl polyoxyethylene ether methylsilane with a mass ratio of 1:1, discharged and dried in the air. Complete the modification of fly ash.