Modified phosphogypsum and phosphogypsum rigid waterproof mortar and preparation method thereof
A rigid waterproof and phosphogypsum technology, which is used in the field of building waterproofing to achieve the effects of improving compatibility, good compatibility and moderate setting time.
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[0036] A third aspect of the present invention provides a method for preparing the phosphogypsum rigid waterproof mortar, the method comprising:
[0037] Mix cement, nano-magnesia, fly ash and fine sand to obtain mixed powder;
[0038] Mix the mixed powder with water, then add modified phosphogypsum, and stir to obtain the mixed material;
[0039] The mixed material is poured, vibrated and maintained to obtain the phosphogypsum rigid waterproof mortar.
[0040] As a preferred version, mixing is carried out by a mixer, the mixing time of the mixed powder is 50-80s; the mixing time of the mixed powder and water is 50-80s; the modified phosphogypsum is added, and the mixed material is obtained by stirring. Stirring time is 60-120s; curing time is 28d.
[0041] All raw materials used to prepare the phosphogypsum rigid waterproof mortar of the present invention can be obtained commercially.
Embodiment 1
[0045] This embodiment provides a phosphogypsum rigid waterproof mortar, the preparation method of which is as follows: in parts by mass, pour 200 parts of cement, 5 parts of nano-magnesia, 5 parts of fly ash and 350 parts of fine sand into the mixer , stirred for 50 to 80 seconds; then poured in 100 parts of water weighed and stirred for 50 to 80 seconds; finally poured the modified phosphogypsum with an amount of 1wt% of the amount of cement, stirred for 60 to 120 seconds, and then poured and vibrated , cured for 28 days under standard curing conditions to obtain phosphogypsum rigid waterproof mortar;
[0046] Wherein, the modified phosphogypsum is prepared according to the following method:
[0047] (1) mixing phosphogypsum with quicklime, aging for 24 hours to obtain the initial material, in parts by mass, relative to 100 parts of the phosphogypsum, 10 parts of the quicklime;
[0048] (2) Pour the initial material and water into a mixer and mix evenly, then adjust the pH ...
Embodiment 2
[0052]This embodiment provides a phosphogypsum rigid waterproof mortar, the preparation method of which is as follows: in parts by mass, pour 220 parts of cement, 5 parts of nano-magnesia, 10 parts of fly ash and 400 parts of fine sand into the mixer , stirred for 50 to 80 seconds; then poured 80 parts of weighed water and stirred for 50 to 80 seconds; finally poured the modified phosphogypsum with an amount of 3wt% of the amount of cement, stirred for 60 to 120 seconds, and then poured and vibrated , cured for 28 days under standard curing conditions to obtain phosphogypsum rigid waterproof mortar;
[0053] Wherein, the preparation method and parameters of the modified phosphogypsum in this embodiment and the dosage of each material are the same as those in Embodiment 1.
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Abstract
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