a gelling material
A technology of cementitious material and micropowder, which is applied in the field of solid waste recycling, can solve the problems of insufficient utilization of steel slag, casting residue slag and water-quenched slag, achieve large-scale resource utilization, and improve mechanical properties and stability. , reduce the effect of differentiation
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Embodiment 1
[0042] Through the mortar activity test, the proportion of the composite micropowder is determined.
[0043] Referring to GB / T17671-1999 cement mortar strength test method (ISO method), weigh 450g P.O 42.5 cement, 1350g standard sand, 225g water, and use JJ-5 cement mortar mixer to prepare cement reference samples; P.O 42.5 cement , the specific surface area is 310~330m 2 / kg, the density is 3.07g / cm 3 , the standard consistency water consumption is 125-129g, the initial setting time is 150-160min, and the final setting time is 300-330min.
[0044] Three kinds of solid wastes: steel slag, water-quenched slag, and casting residue are dried in an oven at 105°C to constant weight, cooled to room temperature, and crushed to a particle size of less than 0.3 mm by a jaw crusher; the above-mentioned three kinds of solid waste are respectively passed through The ball mill is ground for 60 minutes, and the discharged fine powder passes through 80-mesh, 100-mesh, and 200-mesh square-h...
Embodiment 2
[0053] The preparation method of the cementitious material of this example is as follows:
[0054] Weigh 1000 parts of composite micropowder, 40 parts of gypsum, 1 part of carboxylic acid-based water reducer, and 416 parts of water to prepare a cementitious material of a sulfate-activated system with a water-to-binder ratio of 0.4;
[0055] Use a JJ-5 mixer to fully stir to mix all components evenly;
[0056] Pour the freshly mixed slurry into a 40mm×40mm×160mm mold and place it in a standard curing box;
[0057] After the cementitious material is hardened and consolidated, the sample is transferred to the standard curing room after demolding;
[0058] The unconfined compressive strength of the specimens was measured after curing to the target age.
Embodiment 3
[0060] The preparation method of the cementitious material of this example is as follows:
[0061] Weigh 1000 parts of composite micropowder, 40 parts of sodium silicate, 1 part of carboxylic acid-based water-reducing agent, and 416 parts of water to prepare a gelling material of a silicate-activated system with a water-to-binder ratio of 0.4;
[0062] Use a JJ-5 mixer to fully stir to mix all components evenly;
[0063] Pour the freshly mixed slurry into a 40mm×40mm×160mm mold and place it in a standard curing box;
[0064] After the cementitious material is hardened and consolidated, the sample is transferred to the standard curing room after demolding;
[0065] The unconfined compressive strength of the specimens was measured after curing to the target age.
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Abstract
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