Slurry composition for soil improvement containing blast furnace slag cement and method for preparing soil cement slurry using same
A technology of ground improvement and blast furnace slag, applied in fertilizer mixtures, building structures, chemical instruments and methods, etc., can solve problems such as adverse environmental effects, adverse effects on plant growth, and does not contribute to reducing carbon dioxide emissions, so as to ensure Workability, good workability, emission reduction effect
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Embodiment 1～8 and comparative example 1～6
[0048] Under the blending conditions recorded in Table 3, the blast furnace slag cement recorded in Table 2 and mixing water (tap water) of each specified amount are dropped into the pot-type forced mixer, and as a mixture, each specified amount of Blast Furnace Cement listed in Table 1 is dropped. A fluidizer, a hardening accelerator, and an antifoaming agent were kneaded, and slurry compositions for ground improvement of each example were produced.
[0049] [table 3]
[0050]
[0051] Table 3,
[0052] Types of blast furnace slag cement: Types listed in Table 2
[0053] Types of fluidizers, hardening accelerators, and defoamers: Types listed in Table 1
[0054] The amount of fluidizing agent, hardening accelerator and defoamer: relative to 100 parts by mass of blast furnace slag cement, parts by mass based on solid content
[0055] *1: Type B of blast furnace slag cement (density=3.04g / cm 3 , Bryan value 3850cm 2 / g)
[0056] Test part 4 (manufacture and evaluation ...
Embodiment 9～16 and comparative example 7～12
[0058] ·Manufacture of soil cement slurry
[0059] Using the slurry composition for ground improvement of each example produced in Experimental Part 3, soil-cement slurry was produced and evaluated as follows. It is assumed that the target single-screw compressive strength is 5N / mm at the age of 28 days 2 above to determine relative to the soil 1m 3 The combination of the content (kg) of the slurry composition for ground improvement. After a predetermined amount of the slurry composition for ground improvement manufactured in Test Part 3 was put into a Hobart mixer (ホバートミキサー), soil with physical property values recorded in Table 4 (clay soil obtained by excavating the foundation / Silica sand = 3 / 1 (mass ratio) mixed soil obtained by mixing) and mixed, and the soil-mixed cement slurry of each example described in Table 5 was manufactured. The matching conditions of the soil-mixed cement of each example are recorded in Table 5.
[0060] [Table 4]
[0061]
[0062] ·Eva...
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