JPS5988503A - Composite rod foundation material and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the effective production of necessary slag such as converter slag and electric furnace slag.

Converter slag and some types of air furnace slag contain free lime and are known to cause problems such as expansion and collapse of pots when used as civil engineering and construction materials.

As a method for reducing the expansion/decomposition vL and f, a method in which the peak is aged by '+'i L is generally adopted. This method is a method that can economically process slag of large size Di, but the aging period is 3 to 6 months or more and the leaf period 1[1
Since it covers 1, it is necessary to purchase a large area, and the inventory is 2'.
Due to the increased number of foreign particles, it is necessary to tighten the inspection procedures and make efforts to prevent foreign particles. 1) Methods for reducing the aging period (almost 1) have been investigated to improve the rotational noise of the storage space, but it cannot be said that this method has not yet been established from the cost perspective. This is the current situation.

The stabilization mechanism through aging is that free M1 lime reacts with moisture and carbon dioxide in the air to produce calcium hydroxide and calcium carbonate. Since this reaction is a volumetric expansion reaction, the expanding force also propagates around the free lime (/C), and the neighboring free lime continues to undergo a chain reaction f, expanding and pulverizing, causing the slag to collapse. Since free lime exists in the environment where it comes into contact with moisture and air, the process tends to progress easily. Therefore, during aging, watering, turning back the aging mountain, etc. are carried out to increase the aging effect, and the aging process begins at 1. The free lime that exists inside the slag lump is shielded from the outside air and remains unreacted by the knee/puffer, but it is crushed on the surface by crushing. It has been confirmed by JiM that if it is not exposed, it will be in a stable state and will not expand and collapse.

The present invention 1 eliminates the stabilization process by aging of MfM slag such as converter slag or electric furnace slag, and reduces the phenomenon of expansion and collapse, making it suitable for use in roadbed shrines, other ground improvement materials, and civil engineering. +4. The purpose of the present invention is to provide a composite material that can be widely used for bank revetment backfill materials, temporary roadbeds, etc., and a method for producing the same. The composite roadbed 44 is made by mixing slag or electric furnace slag with heavy granulated slag generated in a blast furnace factory, or sandwich-mixing it with granulated blast furnace slag, and the other is converter slag or electric furnace slag generated in a steelmaking factory. Without aging the slag, it is completely mixed or sandwich mixed with the granulated blast furnace slag generated in the blast furnace factory, and the mixing ratio is 0 to 20% with the unaged converter slag or the slag.
Then, the blast furnace granulated slag θ to θ9 (closed).

By mixing as described above, the body expansion over time of unaged converter slag or electric furnace slag is absorbed by the non-expandable and hollow granulated Akane furnace slag as a buffer material, and the expansion as a whole is reduced. This is a method for manufacturing a composite roadbed material, which is characterized in that it reduces the amount of carbon dioxide and provides a composite roadway that does not expand and collapse after use.

According to the present invention, granulated blast furnace slag (hard IQ,
Since it can be used by mixing with 11.5% I11. Aging site can be saved.

Depending on the convenience of shipping, there is no problem in using aged steelmaking slag with a certain culm degree by the method of the present invention.

An example of the present invention is shown.

The properties of the sample used are shown in Table/.

Table / Un-ringed converter slag used after adjusting particle size CMS-, 2s central village degree) 2 Expansion rate at 9℃ curing and 1-C:s (J minute υi (ethylene glycol method) I measured it.

Table 1 shows a sample (X/~ni/υ) in which unaged converter slag and granulated blast furnace slag were mixed and their respective blending ratios.

Table - Note: KS is a mold (sample container) in which samples are charged alternately in layers (referred to as sandwich mixing). lf
, charged together (completely mixed) unaged converter slag (expansion rate θ°C1/θ day curing θg99g)
) and granulated blast furnace slag (expansion rate θ℃, lθ day curing θθ
The figure shows the results of a test conducted by mixing /90 at the blending ratio shown in the table. A water immersion expansion test was conducted to measure the unit response of the roadbed properties: η thread, -car compressive strength, modified CB ratio, and expansion coefficient.

The broken line in the figure is the standard value of J18A, tθ/j road slag (blast furnace slag), but it is the unit volume! j4 Negative Rat is converter slag Aθ (above, crystal furnace granulated slag 09
6', ; MS (granule sizing slag) and kI under J
MSc hydraulic particle size control slag) passed the standard value (, -7
Exceeds the standards for fill, CS (crusher run lag). -The axial compressive strength is standardized only for HA4S, but the converter slag is 7θ9d or higher than the granulated blast furnace slag 3θ! I am satisfied with the large Ii grade with A to F. (I correct C) J slag is 6% or more in converter slag, granulated blast furnace slag! θ! Comprehensive Confucianism-mixture below lli, Sanderutsch mixture +&i S,,
The HA4 S standard has been passed, and the C8 standard is for converter slag! (The above shows that it is possible to deal with granulated slag from the Den 1 reactor at θ9 kq.

Expansion rate of unaged converter slag ttiJLs method 1')
-θC3 months も/4E&ma θθq9iCa1+, θ゛G for iron steel small method, /θ day curing is θδ99c. The iron expansion coefficient of the untreated converter slag completely mixed with θ9c and granulated blast furnace slag with θ9ina is θJ99 (,
Converter slag lθθ
Compared to the 9t (single) one, the former is &<< 9, and the trailing one is much lower than j9C. It can be seen that when the mixing ratio of granulated blast furnace slag exceeds 3θ96f, it becomes very low, and the expansion decreases to 9 (below).

Fi! II, etc. On the wood flow side, the converter slag gθ9 (and the above and granulated blast furnace slag
) It is possible to obtain roadbed properties that meet the MS and HMS (upper layer base course) standards for road slag, but in order to alleviate the expansion of non-knee sink converter slag, it is preferable to add θ% to the converter slag. Biro granulated slag! θ9 (mixture is suitable,
The mixing method is recommended because complete mixing can reduce the expansion coefficient to below □. In this case, if the expansion 4 (hereinafter explained in terms of iron-coated expansion coefficient) of the non-Einong converter slag is within 39, then the 1-section elongation of the composite roadbed material will be about /A or less and will be stabilized, so there is no problem. No. If the expansion rate of unaged converter slag is within 1296, the expansion rate will be stabilized at about 19σ or less even with sandwich mixing, and it can be adopted.

The C3 (lower roadbed) standard uses un-aired converter slag θ.
96 or higher, a mixture of θ9c and d in granulated blast furnace slag Cl
The roadbed characteristics of 1JJa are shown. Since the expansion rate of this aging converter slag is less than that of the converter slag alone, the expansion rate of the aged converter slag may be about 39 g.

As mentioned above, as the composite roadbed phase, unaged steelmaking slag is used at δ'θ ~ no θ%, madder, granulated furnace slag is used at 2θ ~ θ9
(It is possible to use it as a complete mixture or a sandwich mixture at the mixing ratio of
Preferably for layered roadbeds &,t Non-acing I! AX @ slag 7θ~suθ9 (it is appropriate to mix the ratio of blast furnace water 1 if slag 3θ~gθ%). However, this composition is not specific to 411gt, and the variation in the ratio is due to the properties of the raw material slag.hfF? It has been found through a separate 1iIi4 study that it can be 1°t.

In addition to 1 water temperature cutoff and roadbed materials, there are also ground improvement materials, civil engineering materials, and backfilling of crushed debris 41. It is a useful slag material that can be used over a wide range of purposes, such as being able to be used for temporary roadbeds due to its properties.
ft, you can adjust the blending ratio according to the purpose,
For upper roadbed, lower roadbed RF4 and other various civil engineering works
It can be used as a material without worrying about problems caused by expansion.

As detailed above, in the present invention, granulated blast furnace slag is used as a buffer phase to alleviate the expansion of unaged steelmaking slag, and the blending ratio and construction method are determined depending on the degree of expansion rate of steelmaking slag and the purpose of use. We are happy to provide roadbed construction and other civil engineering shrines that can be used safely and at low cost.

[Brief explanation of the drawing]

The drawings show the blending ratios of unaged converter slag and heavy granulated slag, and the changes in their physical properties, in accordance with the present invention. The numbers inside 0 in the figure represent the respective ratios when the test tC/ (converter slag J taste) is /θθ.
The dashed line is the Japanese Industrial Standard value for road slag. Kazuo Wakasugi, Commissioner of the Japan Patent Office, February 13, 1981 1. Indication of the case 1987 Patent Application No. 19-4 Relationship with Mr. Yu Patent applicant address (residence) Funamachi/chome/@, Taisho-ku, Osaka-shi, Osaka Prefecture
No. 44 Naka Yama Amai Cola V Name: Nakayama Steel Works Co., Ltd. 4, Agent address: 7J, Kitahori, 4-ku, Osaka City: I-chome 2-25 Amended Book l Specification of the present application, page 5, Table 1 l in the free lime term of
-(f-Cal)) Correct J to j(f-CaO)J.

Claims (1)

[Claims] / Completely mixed with unaged converter slag or electric furnace slag emitted from small A-1 furnace and 1-furnace granulated slag, or also combined with Zandwig I. Composite roadbed 4=, l. 2. Unaged converter slag and 1-air furnace slag θ~) θ9t, granulated blast furnace slag θ~ and 9% of claim 11.
1゜3L! i! ! 4'+! 11.1 (Converter slag generated at
By mixing yLl or (8) in the form of lint, the temporal expansion of unaged converter slag or air furnace slag can be reduced to granulated blast furnace slag. A manufacturing method for composite roadbed 4A, which has all the characteristics of τI?31 + section road that does not collapse due to tension r+:y. The mixing ratio of fi'II slack to converter slag or I1.[?'iY air furnace slag is θ~!θ9(
In addition, the reactor water 6" toss lag - θ ~ to θ] 6' and 4". .