JP2009203318A5

JP2009203318A5 -

Info

Publication number: JP2009203318A5
Application number: JP2008045945A
Authority: JP
Filing date: 2008-02-27
Publication date: 2012-02-23
Anticipated expiration: 2028-02-27

Description

すなわち、本発明は、以下の態様を包含する。
［１］アルカリ珪酸塩水溶液を主剤とした土質安定化薬液に用いる硬化剤であって、
最大粒子径６００μｍ以下の消石灰（（ａ）成分）と、最大粒子径９０μｍ以下のII型無水石膏（（ｂ）成分）と、アニオン系界面活性剤（（ｃ）成分）とを含有し、
（ａ）成分１００質量部に対して、（ｂ）成分の含有量が４０質量部以上７０質量部以下、（ｃ）成分の含有量が０．２５質量部以上０．８５質量部以下であることを特徴とする土質安定化薬液用硬化剤。
［２］（ｃ）成分がリグニンスルホン酸塩である、［１］に記載の土質安定化薬液用硬化剤。
［３］［１］または［２］に記載の土質安定化薬液用硬化剤と、アルカリ珪酸塩水溶液とを含有する土質安定化薬液。 That is, this invention includes the following aspects.
[1] A curing agent used for a soil stabilization chemical solution mainly composed of an alkali silicate aqueous solution,
Contains a maximum particle diameter 600μm or less hydrated lime ((a) component), and a maximum particle size 90μm or less of type II anhydrous gypsum ((b) component), an anionic surfactant and ((c) component),
(A) With respect to 100 parts by mass of the component, the content of the (b) component is 40 parts by mass or more and 70 parts by mass or less, and the content of the (c) component is 0.25 parts by mass or more and 0.85 parts by mass or less. A hardener for soil stabilization chemicals characterized by the above.
[2] The hardener for soil stabilization chemical solution according to [1], wherein the component (c) is lignin sulfonate.
[3] A soil stabilization chemical containing the curing agent for a soil stabilization chemical according to [1] or [2] and an aqueous alkali silicate solution.

［消石灰］
本発明における消石灰は、最大粒子径が６００μｍ以下、好ましくは１５０μｍ以下のものである。消石灰の最大粒子径が前記上限値以上であると、硬化時間が長くなる。このような消石灰は、例えば、工業用消石灰等の市販品を、最大粒子径が６００μｍ以下、好ましくは１５０μｍ以下になるように粉砕・分級することにより得られる。
消石灰の最大粒子径の下限値には特に制限はないが、最大粒子径が１０μｍ未満の消石灰を用いた場合には、粉砕・分級に長時間を要し不経済であるから、１０μｍ以上であることが好ましい。 [Slaked lime]
The slaked lime in the present invention has a maximum particle size of 600 μm or less , preferably 150 μm or less . When the maximum particle diameter of the slaked lime is equal to or greater than the upper limit value, the curing time becomes long. Such slaked lime is obtained, for example, by pulverizing and classifying a commercial product such as industrial slaked lime so that the maximum particle size is 600 μm or less , preferably 150 μm or less .
The lower limit of the maximum particle size of slaked lime is not particularly limited. However, when slaked lime having a maximum particle size of less than 10 μm is used, it takes a long time for pulverization / classification, which is uneconomical and is not less than 10 μm. It is preferable.

II型無水石膏の最大粒子径は９０μｍ以下、好ましくは４５μｍ以下である。II型無水石膏の最大粒子径が前記上限値以上であると、硬化時間が長くなる。このようなII型無水石膏は、例えば、最大粒子径が９０μｍ以下、好ましくは４５μｍ以下になるように、粉砕・分級することにより得られる。
II型無水石膏の最大粒子径の下限値には特に制限はないが、最大粒子径が５μｍ未満のII型無水石膏を用いた場合には、粉砕・分級に長時間を要し不経済であるから、５μｍ以上であることが好ましい。 The maximum particle size of type II anhydrous gypsum is 90 μm or less , preferably 45 μm or less . When the maximum particle size of the type II anhydrous gypsum is equal to or larger than the above upper limit value, the curing time becomes long. Such type II anhydrous gypsum can be obtained, for example, by pulverization and classification so that the maximum particle size is 90 μm or less , preferably 45 μm or less .
The lower limit of the maximum particle size of type II anhydrous gypsum is not particularly limited. However, when type II anhydrous gypsum having a maximum particle size of less than 5 μm is used, it takes a long time to grind and classify, which is uneconomical. Therefore, it is preferably 5 μm or more.

表２から明らかなように、硬化剤が、最大粒子径６００μｍ以下の消石灰と、最大粒子径９０μｍ以下のII型無水石膏と、アニオン系界面活性剤とを含有し、無水石膏の含有量が４０〜７０質量部、アニオン系界面活性剤の含有量が０．２５〜０．８５質量部である試験番号２，４〜８，１２〜１５，１７〜２０，２２，２５〜２８の実施例では、硬化時間、硬化体強度、Ｂ液の均質性の性能基準を全て同時に満たしていた。
これに対し、石灰類として生石灰を用いた試験番号２の例では、硬化時間が長かった。
消石灰の最大粒子径が６００μｍを超えていた試験番号３の例では、硬化時間が長かった。
石膏として２水石膏を用いた試験番号９の例では、硬化時間が長かった。
石膏として半水石膏を用いた試験番号１０の例では、硬化剤液の均質性が低かった。
II型無水石膏の最大粒子径が９０μｍを超えていた試験番号１１の例では、硬化時間が長かった。
II型無水石膏の含有量が４０質量部未満であった試験番号１６の例では、硬化体の強度が低かった。
II型無水石膏の含有量が７０質量部を超えていた試験番号２１の例では、硬化時間が長く、しかも硬化体の強度が低かった。
界面活性剤としてノニオン系界面活性剤を用いた試験番号２３の例では、硬化剤液の均質性が低かった。
界面活性剤の含有量が０．２５質量部未満であった試験番号２４の例では、硬化剤液の均質性が低かった。
界面活性剤の含有量が０．８５質量部を超えていた試験番号２９の例では、硬化剤液の均質性が低かった。 As apparent from Table 2, the curing agent is a less hydrated lime maximum particle size 600 .mu.m, and the following type II anhydrous gypsum maximum particle size 90 [mu] m, containing a anionic surfactant, the content of the anhydrite 40 In Examples of Test Nos. 2, 4 to 8, 12 to 15, 17 to 20, 22, 25 to 28 in which the content of the anionic surfactant is 0.25 to 0.85 parts by mass. The performance criteria of curing time, cured body strength, and homogeneity of B liquid were all satisfied at the same time.
On the other hand, in the example of test number 2 using quick lime as limes, the curing time was long.
In the example of test number 3 in which the maximum particle size of slaked lime exceeded 600 μm, the curing time was long.
In the example of test number 9 using 2 water gypsum as the gypsum, the curing time was long.
In the example of test number 10 using hemihydrate gypsum as the gypsum, the homogeneity of the curing agent liquid was low.
In the example of test number 11 in which the maximum particle size of the type II anhydrous gypsum exceeded 90 μm, the curing time was long.
In the example of test number 16 in which the content of type II anhydrous gypsum was less than 40 parts by mass, the strength of the cured product was low.
In the example of test number 21 in which the content of type II anhydrous gypsum exceeded 70 parts by mass, the curing time was long and the strength of the cured product was low.
In the example of test number 23 using a nonionic surfactant as the surfactant, the homogeneity of the curing agent liquid was low.
In the example of test number 24 in which the surfactant content was less than 0.25 parts by mass, the homogeneity of the curing agent liquid was low.
In the example of Test No. 29 in which the surfactant content exceeded 0.85 parts by mass, the homogeneity of the curing agent liquid was low.

Claims

A curing agent used for a soil stabilization chemical solution mainly composed of an alkali silicate aqueous solution,
Contains a maximum particle diameter 600μm or less hydrated lime ((a) component), and a maximum particle size 90μm or less of type II anhydrous gypsum ((b) component), an anionic surfactant and ((c) component),
(A) With respect to 100 parts by mass of the component, the content of the (b) component is 40 parts by mass or more and 70 parts by mass or less, and the content of the (c) component is 0.25 parts by mass or more and 0.85 parts by mass or less. A hardener for soil stabilization chemicals characterized by the above.