Steel slag-desulfurized gypsum based soil solidification agent applicable to arsenic contaminated soil
A technology of soil curing agent and desulfurized gypsum, which is applied in the field of soil in-situ curing agent, can solve the problems of high cement volume increase ratio, reduced toxicity of arsenic leaching, and no treatment method, so as to reduce costs, improve curing efficiency, reduce The effect of blending amount
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Embodiment 1
[0045] (1) Preparation of soil stabilizer:
[0046] Weigh 40% steel slag, 25% desulfurized gypsum, 25% slag, 7% clinker and 3% activator by mass percentage. Use a ball mill to grind the steel slag until the fineness is no more than 80 μm, and the sieve allowance is no more than 3.5%; add desulfurized gypsum, slag, cement clinker and activator to continue grinding until the fineness of the mixture is no more than 80 μm, and the sieve allowance is no more than 3.5%. More than 1.5%, that is to obtain soil stabilizer.
[0047] (2) Remediation of arsenic-contaminated soil:
[0048] Mix the soil curing agent and the arsenic-contaminated soil evenly, control its water content to 17%, and compact it by rolling to make the density reach more than 95%.
[0049] (3) Curing effect test:
[0050] Take the solidified samples that were cured for 14 days, 28 days, 56 days, and 90 days respectively to prepare the leachate according to the standard of "Solid Waste Leaching Toxicity Leaching ...
Embodiment 2
[0054] (1) Preparation of soil stabilizer:
[0055] Weigh 43% steel slag, 15% desulfurized gypsum, 30% slag, 9% clinker and 3% activator by mass percentage. Use a ball mill to grind the steel slag until the fineness is not more than 80 μm, and the sieve allowance is not more than 3.5%; add the desulfurized gypsum, slag, cement clinker and activator after grinding and continue grinding until the fineness of the mixture is not more than 80 μm, If the sieve residue is not more than 1.5%, the soil stabilizer is obtained.
[0056] (2) Remediation of arsenic-contaminated soil:
[0057] Mix the soil curing agent and the arsenic-contaminated soil evenly, control its water content to 17%, and compact it by rolling to make the density reach more than 95%.
[0058] (3) Curing effect test:
[0059] Take the solidified samples that were cured for 14 days, 28 days, 56 days, and 90 days respectively to prepare the leachate according to the standard of "Solid Waste Leaching Toxicity Leachi...
Embodiment 3
[0063] (1) Preparation of soil stabilizer:
[0064] Weigh 45% steel slag, 20% desulfurized gypsum, 22% slag, 10% clinker and 3% activator by mass percentage. Use a ball mill to grind the steel slag until the fineness is not more than 80 μm, and the sieve allowance is not more than 3.5%; add the desulfurized gypsum, slag, cement clinker and activator after grinding and continue grinding until the fineness of the mixture is not more than 80 μm, If the sieve residue is not more than 1.5%, the soil stabilizer is obtained.
[0065] (2) Remediation of arsenic-contaminated soil:
[0066] Mix the soil curing agent and the arsenic-contaminated soil evenly, control its water content to 17%, and compact it by rolling to make the density reach more than 95%.
[0067] (3) Curing effect test:
[0068] Take the solidified samples that were cured for 14 days, 28 days, 56 days, and 90 days respectively to prepare the leachate according to the standard of "Solid Waste Leaching Toxicity Leach...
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