JP3451110B2 - Waterproof lightweight foamed cured product - Google Patents

Waterproof lightweight foamed cured product

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Publication number
JP3451110B2
JP3451110B2 JP15090293A JP15090293A JP3451110B2 JP 3451110 B2 JP3451110 B2 JP 3451110B2 JP 15090293 A JP15090293 A JP 15090293A JP 15090293 A JP15090293 A JP 15090293A JP 3451110 B2 JP3451110 B2 JP 3451110B2
Authority
JP
Japan
Prior art keywords
water
cured product
lightweight foamed
asphalt emulsion
content
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP15090293A
Other languages
Japanese (ja)
Other versions
JPH0710653A (en
Inventor
勝俊 佐藤
卓郎 黒川
省吾 池田
澄夫 堀内
伸 内山
卓郎 小田原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimizu Corp
Nichireki Co Ltd
Original Assignee
Shimizu Corp
Nichireki Co Ltd
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Filing date
Publication date
Application filed by Shimizu Corp, Nichireki Co Ltd filed Critical Shimizu Corp
Priority to JP15090293A priority Critical patent/JP3451110B2/en
Publication of JPH0710653A publication Critical patent/JPH0710653A/en
Application granted granted Critical
Publication of JP3451110B2 publication Critical patent/JP3451110B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Description

【発明の詳細な説明】 【０００１】 【産業上の利用分野】本発明は、土木・建築工事におけ
る盛土の構築、埋戻し、充填等に用いられる地盤材料と
して好適な止水性軽量発泡硬化体に関する。 【０００２】 【従来の技術】従来、土木・建築工事における盛土や埋
戻し等に用いられる材料としては、土砂やソイルセメン
ト等が使用されてきた。しかし、これらの材料はその比
重が概して重いため、地盤のすべり破壊や大きな圧密沈
下等が生じる問題があった。これらの問題を解決するた
めの材料として、発泡スチロールや発泡モルタル等があ
るが、前者は有機溶剤に可溶性であることや耐火性の点
で問題があり、後者に至っては、盛土材などの地盤材料
としては強度が高すぎるといった欠点を有している。 【０００３】上記材料の問題点を解消する材料として上
記発泡モルタルの気泡の混入率を５０％以上まで高め
て、強度を１０ｋｇｆ／ｃｍ2程度にまで抑さえた気泡
モルタルが実用に供されている。しかし、この材料にあ
っても、長期間にわたって地下水や雨水が浸透すると湿
潤密度が大きくなり、初期の軽量性が失われるといった
欠点がある。 【０００４】また、上記のように多量の気泡を含む材料
は、打設初期の発現強度が低く、また水密性も低いため
に、含有する水分が気中に散逸し、乾燥ひび割れが生
じ、上記雨水の侵入に加えて、強度低下を招くなど構造
上の欠点ともなっている。 【０００５】そこで、適量の水ガラスを急結剤として添
加して初期強度を高め、打設後数時間で数ｋｇｆ／ｃｍ
2程度の強度を発現させることができる気泡モルタルが
開発されている。 【０００６】 【発明が解決しようとする課題】しかしながら、上記水
ガラスを添加した気泡モルタルにあっても、初期の乾燥
に起因する乾燥ひび割れによる欠点は解消されていな
い。 【０００７】本発明は、上記の課題に鑑みてなされたも
のであり、盛土や埋戻し等に用いられる材料としての軽
量性・強度を有し、乾燥によるひび割れが発生せず、か
つ地下水や雨水が浸透を抑さえる止水性軽量発泡硬化体
を提供することを目的としている。 【０００８】 【課題を解決するための手段】本発明の請求項１に係る
止水性軽量発泡硬化体は、土木・建築工事における盛土
材あるいは埋戻し材等の地盤材料として用いられる止水
性軽量発泡硬化体であって、水硬性硬化剤と、起泡剤
と、急結剤と、水と、アスファルト乳剤とを混合して硬
化してなり、かつ、当該止水性軽量発泡硬化体に対する
前記アスファルト乳剤の含有率が５〜２０ｖｏｌ％であ
ることを特徴としている。 【０００９】 【００１０】以下、本発明を詳しく説明する。本発明の
止水性軽量発泡硬化体は、水硬性硬化材と水とを反応さ
せて硬化させるとともに、起泡剤により硬化体中に気泡
を導入させて軽量化を図り、急結剤によって硬化を促進
させて硬化初期から強度を付与し、さらにアスファルト
乳剤により有機被膜を硬化体表面に形成させて、該硬化
体からの水分の散逸および硬化体内部への透水性を抑さ
え、盛土材などとしての強度を具備し、かつ、長期使用
によっても湿潤密度の増大を抑さえることができる止水
性の軽量発泡硬化体である。 【００１１】具体的には、実用上不透水とみなされる透
水性、すなわち透水係数が１×１０-5ｃｍ／ｓｅｃ程度
以下の透水性を有し、かつ打設初期の発現強度が数ｋｇ
ｆ／ｃｍ2程度の特性を有するようにした水硬性硬化体
である。 【００１２】本発明の止水性軽量発泡硬化体に使用され
る水硬性硬化剤としては、セメント、石灰、スラグ等の
無機材料や、ウレタンプレポリマー、アクリルアミドな
どの有機材料を用いることができるが、瞬結性および長
期強度を確保する等の点から特にセメントが好ましい。 【００１３】上記のセメントとしては、一般にポルトラ
ンドセメントが使用されるが、その他の各種セメント、
例えば高炉セメント、フライアッシュセメントなどの混
合セメントや、アルミナセメントなどの特種セメントを
使用することもできる。 【００１４】前記起泡剤としては、膠質ブチルスルフォ
ン酸ナフタレン、ゼラチン、カゼインなどの淡泊質の誘
導体、サポニン、樹脂石けん、硫酸ラウリルソーダー等
を使用することができる。なお、使用する材料により異
なるが、本発明においては、起泡剤の配合量は、水硬性
硬化剤１００重量部に対して０．１〜８．０重量部程度
とされる。なお、この起泡剤による硬化体中の気泡の混
入率は、２０〜８０％程度である。 【００１５】急結剤としては、水ガラス、重クロム酸カ
リ、ケイフッ化ソーダー、アルミン酸ソーダー、塩化ア
ルミニウム、塩化カルシウム等が用いられるが、瞬結性
に優れ、強度発現性が良好で、かつ取扱いの安全性など
の点から特に水ガラス（ＪＩＳ３号品（Ｓｉ０2含量２
８〜３０％））が好適である。なお、使用する材料によ
り異なるが、本発明の止水性軽量発泡硬化体における急
結剤の配合量は、水硬性硬化剤１００重量部に対して１
０〜１００重量部程度とされる。また、本発明の水硬性
軽量発泡硬化体における水の混合量は水硬性硬化剤１０
０重量部に対して１００〜３００重量部程度とされる。 【００１６】アスファルト乳剤としては、カチオン系、
ノニオン系、アニオン系のアスファルト乳剤が用いられ
る。カチオン系のアスファルト乳剤は、アルカリや塩類
の存在によって容易に水を放出しながら相分離し、有機
止水層を形成する。一方、アニオン系、ノニオン系のア
スファルト乳剤は、塩類が存在しても安定性が高く、徐
々に水を放出しながら相分離し、有機止水層を形成す
る。このため、本発明の混合用としては、相分離が緩や
かに起こり、硬化体表面に密着性の高い有機被膜を形成
するアニオン系およびノニオン系の乳剤が適している。
そして、硬化体表面に密着性のより高い有機被膜を形成
する点から、特にアニオン系のアスファルト乳剤が本発
明に添加混合するアスファルト乳剤として好適である。
なお、使用する材料により異なるが本発明の止水性軽量
発泡硬化体におけるアスファルト乳剤の配合量は、水硬
性硬化剤１００重量部に対して、３０〜２００重量部程
度とされる。 【００１７】また、硬化体中におけるアスファルト乳剤
の含有率としては硬化体中の５〜２０ｖｏｌ％とする。
なぜなら、５ｖｏｌ％未満では、多くの場合、硬化体の
透水係数が実用上不透水とみなされる１×１０−５ｃｍ
／ｓｅｃを越えてしまうからである。また、２０ｖｏｌ
％を越えると硬化体の物性がアスファルトに近づき、変
形係数が大きくなる上、クリープ変形も大きくなるため
である。 【００１８】次に、本発明の止水性軽量発泡硬化体の製
造方法について説明する。上記構成材料の混合方法に
は、 （イ）水硬性硬化剤と水と起泡剤とを混合し、この混合
物に急結剤を添加混合し、硬化が始まる前に最後にアス
ファルト乳剤を添加混合する。 （ロ）水硬性硬化剤と水と起泡剤とを混合し、この混合
物にアスファルト乳剤を添加混合し、最後に急結剤を添
加混合する。 （ハ）水硬性硬化剤と水と起泡剤とアスファルト乳剤と
を混合し、最後に急結剤を添加混合する。 （ニ）水硬性硬化剤と水と起泡剤とを混合し、アスファ
ルト乳剤と急結剤とを混合し、これら二つの混合物を混
合する。の４つの方法がある。 【００１９】アスファルト乳剤を使用する場合、アスフ
ァルトが機材に付着するため、清掃が必須となる。この
清掃作業を軽減するため、極端な初期強度発現が必要で
ない場合には、（イ）の方法が製造プラントの整備の点
で有利である。一方、硬化体作製時に瞬結性ないしはそ
れに近い性状が必要な場合には、（イ）の方法では均一
にアスファアルト乳剤を混合できないので、急結剤を後
添加する（ロ）〜（ニ）の方法が好適となる。 【００２０】 【作用】前記請求項１の発明によれば、アスファルト乳
剤が相分離して、硬化体表面に有機被膜が形成され、該
硬化体からの水分の散逸が抑さえられるとともに、乾燥
によるひび割れが防止される。また、硬化体内への水の
浸透が抑さえられる。 【００２１】 【実施例】以下、実施例により、本発明を具体的に説明
する。表１に本発明の止水性軽量発泡硬化体の作製に供
した材料およびその配合量を示した。 【表１】 表１に示した材料を上記混合方法（イ）により混合し、
止水性軽量発泡硬化体を作製した。すなわち、普通ポル
トランドセメント２５０kg／ｍ3、起泡剤０．６kg／
ｍ3、水３００kg／ｍ3、水ガラス１２０kg／ｍ3からな
るゲルタイム１４秒程度の材料に、アニオン系アスファ
ルト乳剤を内割体積で、２．５〜２０％添加混合した。
なお、材料の水ガラスは、混合に際して予め水で希釈
（ 水ガラス／水＝２）して混合が容易に行われるよう
に調製した。また、気泡の混入率は、５３％とした。そ
して、これらアスファルト乳剤の含有率を変化させた止
水性軽量発泡硬化体について、その透水試験並びに強度
試験を行った。 【００２２】図１は、アスファルト乳剤の含有率（気泡
モルタルに対する内割体積比）を変化させて止水性軽量
発泡硬化体を得、これらの硬化体の材令３４日における
透水試験（ＪＩＳ Ａ１２１８に準じる。）の結果を示
したものである。図１に示したように、透水係数（対数
表示）は、アスファルト乳剤の含有率が高くなるにつれ
て直線的に減少することが確認された（透水係数の低下
率は、含有率２％で３６％、含有率５％で４７％、含有
率１０％で８７％、含有率２０％で９７％であった）。
材料の透水係数は添加前の材料の透水係数によって大き
く影響を受ける多種の材料に対して不透水材を得るため
には安全を見て、アスファルト乳剤の含有率を５％以上
として混合しなければならないことが判明した。 【００２３】図２は、本発明の止水性軽量発泡硬化体を
アスファルト乳剤の含有率を変化させて得、材令３、
７、３４日における一軸圧縮強さ試験（ＪＩＳ Ａ１２
１６に準じる。）の結果を示したものである。図２に示
したように、各材令ともアスファルト乳剤の含有率が高
くなるにつれて、その一軸圧縮強さは低くなることが確
認された。材令３日における強度は、アスファルト乳剤
の含有率が２０ｖｏｌ％の場合においても約６ｋｇｆ／
ｃｍ2であり、盛土の初期強度として十分な強度発現が
確認された。また、アスファルト乳剤の含有率が２０ｖ
ｏｌ％の止水性軽量発泡硬化体の強度の経時変化につい
ても、材令とともに増加し、材令３４日では、約８ｋｇ
ｆ／ｃｍ2で盛土等に用いる材料として十分な強度が得
られることが確認された。しかし、アスファルト乳剤の
添加を２０ｖｏｌ％以上とした場合には、アスファルト
の物性が卓越し、クリープ変形等が大きくなるため、盛
土材としての利用は難しくなる。したがって、盛土材等
に用いる材料としては、アスファルト乳化剤の含有量
を、２０ｖｏｌ％以下として混合しなければならないこ
とが判明した。 【００２４】以上説明したように、本発明の止水性軽量
発泡硬化体によれば、表１に示した材料を上記（イ）の
混合方法により混合し、セメントに由来するアルカリの
作用によりアスファルト乳剤を相分離させて、硬化体中
に有機被膜を形成させ、硬化体からの水分の散逸を抑さ
え、乾燥による硬化体のひび割れを防止したので、アス
ファルト乳剤の含有率が２０ｖｏｌ％の場合においても
材令３日強度で約６ｋｇｆ／ｃｍ2と、盛土の初期強度
として十分な強度発現が得られることが確認された。ま
た、上記有機被膜により硬化体内部への水の浸透を抑さ
えるようにしたので、アスファルト乳剤の含有率が５ｖ
ｏｌ％以上であれば、透水係数が実用上不透水とみなさ
れる１×１０-5ｃｍ／ｓｅｃ以下に抑さえることがで
き、長期使用による湿潤密度の増大を抑さえることがで
きる。 【００２５】 【発明の効果】本発明に係る止水性軽量発泡硬化体によ
れば、以下の効果を奏することができる。請求項１記載
の止水性軽量発泡硬化体によれば、硬化体表面に有機被
膜を形成し、該硬化体からの水分の散逸を抑さえるとと
もに、乾燥によるひび割れを防止し、かつ硬化体内部へ
の水の浸透を抑さえるようにしたので、ひび割れによる
強度低下を抑さえるとともに、地下水あるいは雨水等の
侵入による湿潤密度の増大を抑さえることができる。 【００２６】特に、アスファルト乳剤を硬化体中の５〜
２０ｖｏｌ％となるように混合したので、アスファルト
乳剤の含有率が２０ｖｏｌ％の場合においても材令３日
強度で約６ｋｇｆ／ｃｍ２と、盛土の初期強度として十
分な強度発現を得ることができる。また、上記有機被膜
により硬化体内部への水の浸透を抑さえるようにしたの
で、アスファルト乳剤の含有率が５ｖｏｌ％以上であれ
ば、透水係数が実用上不透水とみなされる１×１０−５
ｃｍ／ｓｅｃ以下に抑さえることができ、長期使用によ
る湿潤密度の増大を抑さえることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground material suitable as a ground material used for construction, backfilling, filling, etc. of embankment in civil engineering and construction work. The present invention relates to an aqueous lightweight foamed cured product. [0002] Conventionally, earth and sand, soil cement, and the like have been used as materials for embankment and backfilling in civil engineering and construction work. However, since these materials generally have a high specific gravity, there has been a problem that the ground may be slid and the consolidation may sink. Materials for solving these problems include expanded polystyrene and expanded mortar.The former has problems in solubility in organic solvents and fire resistance, and the latter has problems in ground materials such as embankment materials. Has the disadvantage that the strength is too high. [0003] As a material for solving the problems of the above materials, a foam mortar in which the mixing ratio of bubbles in the foam mortar is increased to 50% or more and the strength is suppressed to about 10 kgf / cm 2 has been put to practical use. . However, even with this material, there is a drawback that when groundwater or rainwater permeates for a long period of time, the wet density increases and the initial lightness is lost. [0004] Further, as described above, the material containing a large amount of air bubbles has a low developing strength in the initial stage of casting and low water tightness, so that the water contained therein is scattered in the air, causing dry cracks. In addition to rainwater intrusion, it has structural disadvantages such as reduced strength. Therefore, an appropriate amount of water glass is added as a quick setting agent to increase the initial strength, and several kgf / cm
A foam mortar capable of exhibiting a strength of about 2 has been developed. [0006] However, even with the above-mentioned foamed mortar to which water glass has been added, the drawback due to dry cracks caused by initial drying has not been solved. The present invention has been made in view of the above problems, and has a light weight and strength as a material used for embankment and backfilling, does not cause cracking due to drying, and has no problem with groundwater or rainwater. It is an object of the present invention to provide a water-resistant lightweight foamed cured product that suppresses penetration. [0008] A water-resistant lightweight foamed cured product according to claim 1 of the present invention is used for embankment in civil engineering and construction work.
Water stoppage used as ground material such as wood or backfill material
A sexual lightweight foamed and cured body, a hydraulic curing agent, and foaming agent, a quick-setting admixture, and water, the hardness by mixing a bitumen emulsion
And, for the water-resistant lightweight foamed cured product
When the content of the asphalt emulsion is 5 to 20 vol%,
It is characterized in that that. Hereinafter, the present invention will be described in detail. The water-resistant and lightweight foamed cured product of the present invention is cured by reacting a hydraulic curing material with water and curing, and introducing bubbles into the cured product with a foaming agent to reduce the weight and cure with a quick-setting agent. The strength is imparted from the early stage of curing by accelerating, and furthermore, an organic film is formed on the surface of the cured body by asphalt emulsion to suppress the dissipation of water from the cured body and the permeability to the inside of the cured body, as a banking material, etc. This is a water-resistant, lightweight, foamed cured product having the above strength and capable of suppressing an increase in wet density even after long-term use. Specifically, it has a water permeability that is regarded as practically impermeable, that is, a water permeability of about 1 × 10 −5 cm / sec or less, and an initial development strength of several kg.
It is a hydraulically cured product having characteristics of about f / cm 2 . As the hydraulic hardening agent used in the water-resistant lightweight foamed cured product of the present invention, inorganic materials such as cement, lime and slag, and organic materials such as urethane prepolymer and acrylamide can be used. Cement is particularly preferred from the viewpoint of securing quick setting and long-term strength. As the above cement, Portland cement is generally used.
For example, mixed cements such as blast furnace cement and fly ash cement, and special cements such as alumina cement can be used. Examples of the foaming agent include naphthylene butylsulfonate, gelatin, casein derivatives such as casein, saponin, resin soap, lauryl sulfate soda and the like. In addition, although it changes with materials used, in this invention, the compounding quantity of a foaming agent is about 0.1-8.0 weight part with respect to 100 weight part of hydraulic hardening agents. The mixing ratio of bubbles in the cured product by this foaming agent is about 20 to 80%. As the quick setting agent, water glass, potassium dichromate, sodium silicofluoride, sodium aluminate, aluminum chloride, calcium chloride and the like are used. especially water glass from the viewpoint of the handling of safety (JIS3 No. goods (Si0 2 content 2
8 to 30%)). The amount of the quick-setting binder in the water-resistant lightweight foamed cured product of the present invention is 1 to 100 parts by weight of the hydraulic curing agent, although it depends on the material used.
It is about 0 to 100 parts by weight. The mixing amount of water in the hydraulic lightweight foamed cured product of the present invention is 10
It is about 100 to 300 parts by weight with respect to 0 parts by weight. Asphalt emulsions include cationic type,
A nonionic or anionic asphalt emulsion is used. The cationic asphalt emulsion undergoes phase separation while easily releasing water due to the presence of alkalis and salts to form an organic water-blocking layer. On the other hand, an anionic or nonionic asphalt emulsion has high stability even in the presence of salts, and phase-separates while gradually releasing water to form an organic waterproof layer. For this reason, anionic and nonionic emulsions which cause a gradual phase separation and form an organic film having high adhesion on the surface of the cured product are suitable for the mixing of the present invention.
In addition, an anionic asphalt emulsion is particularly suitable as an asphalt emulsion to be added and mixed in the present invention, since an organic film having higher adhesion is formed on the surface of the cured product.
The blending amount of the asphalt emulsion in the water-resistant lightweight foamed cured product of the present invention is about 30 to 200 parts by weight, based on 100 parts by weight of the hydraulic curing agent, although it varies depending on the material used. The content of the asphalt emulsion in the cured product is 5 to 20 vol% in the cured product .
If the content is less than 5 vol%, the water permeability of the cured product is often 1 × 10 −5 cm, which is considered to be impermeable in practice.
/ Sec. In addition, 20vol
%, The physical properties of the cured body approach those of asphalt, the deformation coefficient increases, and the creep deformation also increases. Next, a method for producing the water-resistant lightweight foamed cured product of the present invention will be described. The mixing method of the above constituent materials includes: (a) mixing a hydraulic hardener, water and a foaming agent, adding a quick-setting agent to the mixture, and finally adding an asphalt emulsion before the hardening starts. I do. (B) A hydraulic hardening agent, water and a foaming agent are mixed, an asphalt emulsion is added to the mixture, and finally, a quick-setting agent is added and mixed. (C) A hydraulic hardener, water, a foaming agent, and an asphalt emulsion are mixed, and finally a quick-setting agent is added and mixed. (D) A hydraulic hardener, water and a foaming agent are mixed, an asphalt emulsion and a quick-setting agent are mixed, and these two mixtures are mixed. There are four methods. When using an asphalt emulsion, cleaning is essential because the asphalt adheres to the equipment. In order to reduce this cleaning work, when it is not necessary to develop an extreme initial strength, the method (a) is advantageous in terms of maintenance of a manufacturing plant. On the other hand, when a quick-setting property or a property close to it is required during the production of a cured product, the asphalt emulsion cannot be uniformly mixed by the method (a), so the quick-setting agent is added later (b) to (d). Is suitable. According to the first aspect of the present invention , the asphalt emulsion undergoes phase separation, an organic film is formed on the surface of the cured product, the dissipation of water from the cured product is suppressed, and the drying is performed by drying. Cracks are prevented. In addition, penetration of water into the cured body is suppressed. The present invention will be described below in detail with reference to examples. Table 1 shows the materials used for producing the water-resistant lightweight foamed cured product of the present invention and the amounts thereof. [Table 1] The materials shown in Table 1 were mixed by the above mixing method (a),
A water-resistant lightweight foamed cured product was produced. That is, ordinary Portland cement 250 kg / m 3 , foaming agent 0.6 kg /
m 3, water 300 kg / m 3, the gel time 14 seconds to materials consisting of water glass 120 kg / m 3, the inner split volume anionic bitumen emulsion was added and mixed from 2.5 to 20%.
The water glass as the material was prepared by diluting with water in advance (water glass / water = 2) at the time of mixing so that mixing was easily performed. The mixing ratio of bubbles was 53%. Then, with respect to the water-resistant lightweight foamed cured product in which the content of the asphalt emulsion was changed, a water permeability test and a strength test were performed. FIG. 1 shows that a water-stop lightweight foamed cured product was obtained by changing the content of asphalt emulsion (internal volume ratio with respect to cellular mortar), and a water permeability test of these cured products on 34 days of age (JIS A1218). According to the above). As shown in FIG. 1, it was confirmed that the water permeability (logarithmic representation) decreased linearly as the asphalt emulsion content increased (the rate of decrease of the water permeability was 36% at a content of 2%). 47% at a content of 5%, 87% at a content of 10%, and 97% at a content of 20%).
The water permeability of the material is greatly affected by the water permeability of the material before the addition. In order to obtain a water-impermeable material for various materials, it is necessary to mix the asphalt emulsion content more than 5% in consideration of safety. It turned out not to be. FIG. 2 shows the water-resistant and lightweight foamed cured product of the present invention obtained by changing the content of asphalt emulsion.
Uniaxial compressive strength test on 7 and 34 days (JIS A12
According to 16. ). As shown in FIG. 2, it was confirmed that as the asphalt emulsion content increased with each age, the uniaxial compressive strength decreased. The strength at 3 days of age was about 6 kgf / even when the asphalt emulsion content was 20 vol%.
cm 2 , and sufficient strength was confirmed as the initial strength of the embankment. Further, the content of asphalt emulsion was 20 v
ol% of the water-resistant, light-weight, foamed and hardened body, the change with time also increases with the age of the material.
It was confirmed that f / cm 2 provided sufficient strength as a material used for embankment and the like. However, when the addition of the asphalt emulsion is 20 vol% or more, the physical properties of the asphalt are excellent, and the creep deformation and the like become large, so that it is difficult to use the asphalt embankment material. Therefore, it was found that as a material used for the embankment material and the like, the content of the asphalt emulsifier must be mixed at 20 vol% or less. As described above, according to the water-resistant lightweight foamed cured product of the present invention, the materials shown in Table 1 are mixed by the mixing method (A), and the asphalt emulsion is formed by the action of alkali derived from cement. To form an organic film in the cured product, to suppress the dissipation of water from the cured product, and to prevent cracking of the cured product by drying. Therefore, even when the content of the asphalt emulsion is 20 vol%, It was confirmed that sufficient strength was obtained as the initial strength of the embankment, which was about 6 kgf / cm 2 at a three-day material strength. Further, since the penetration of water into the inside of the cured product is suppressed by the organic coating, the content of the asphalt emulsion is 5 v
If it is at least ol%, the water permeability can be suppressed to 1 × 10 −5 cm / sec or less, which is regarded as practically impermeable, and an increase in wet density due to long-term use can be suppressed. According to the water-stopping lightweight foamed cured product of the present invention, the following effects can be obtained. According to the water-stopping lightweight foamed cured product according to claim 1, an organic film is formed on the surface of the cured product, the dissipation of moisture from the cured product is suppressed, cracks due to drying are prevented, and the inside of the cured product is introduced. In this way, it is possible to suppress a decrease in strength due to cracks and an increase in wet density due to intrusion of groundwater or rainwater. In particular, the asphalt emulsion is prepared by adding 5 to 5
Since the mixing was performed so as to be 20 vol%, even when the content of the asphalt emulsion was 20 vol%, it was possible to obtain a sufficient strength expression as the initial strength of the embankment, that is, about 6 kgf / cm 2 with a three-day age. Further, since the penetration of water into the inside of the cured product is suppressed by the organic coating, if the content of the asphalt emulsion is 5 vol% or more, the water permeability is considered to be 1 × 10 −5 which is considered to be practically impermeable.
cm / sec or less, and increase in wet density due to long-term use can be suppressed.

【図面の簡単な説明】 【図１】アスファルト乳剤の含有率を変化させて硬化さ
せた本発明の止水性軽量発泡硬化体の透水試験結果を示
す図である。 【図２】アスファルト乳剤の含有率を変化させて硬化さ
せた本発明の止水性軽量発泡硬化体の材令３、７、３４
日における一軸圧縮強さ試験の結果を示す図である。 【符号の説明】 なしBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a water permeability test result of a water-resistant lightweight foamed cured product of the present invention cured by changing the content of an asphalt emulsion. FIG. 2 shows the material age of a water-resistant and lightweight foamed cured product of the present invention cured by changing the content of asphalt emulsion,
It is a figure which shows the result of the uniaxial compressive strength test in a day. [Explanation of symbols] None

───────────────────────────────────────────────────── フロントページの続き (72)発明者 池田 省吾 栃木県下都賀郡国分寺町柴272番地 日 瀝化学工業株式会社内 (72)発明者 堀内 澄夫 東京都港区芝浦一丁目２番３号 清水建 設株式会社内 (72)発明者 内山 伸 東京都港区芝浦一丁目２番３号 清水建 設株式会社内 (72)発明者 小田原 卓郎 東京都港区芝浦一丁目２番３号 清水建 設株式会社内 (56)参考文献 特開 平２−166164（ＪＰ，Ａ) 特開 昭61−48489（ＪＰ，Ａ) 特開 昭51−10827（ＪＰ，Ａ) 特開 昭59−21562（ＪＰ，Ａ) 特開 昭52−43814（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 38/00 - 38/10 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Shogo Ikeda 272 Shiba, Kokubunji-cho, Shimotsuga-gun, Tochigi Prefecture Within (72) Inventor Sumio Horiuchi 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Incorporated (72) Inventor Shin Uchiyama 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation Incorporated (72) Inventor Takuro Odawara 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation In-company (56) References JP-A-2-166164 (JP, A) JP-A-61-48489 (JP, A) JP-A-51-10827 (JP, A) JP-A-59-21562 (JP, A) JP, A 52-43814 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C04B 38/00-38/10

Claims (1)

(57)【特許請求の範囲】 【請求項１】 土木・建築工事における盛土材あるいは
埋戻し材等の地盤材料として用いられる止水性軽量発泡
硬化体であって、水硬性硬化剤と、起泡剤と、急結剤
と、水と、アスファルト乳剤とが混合されて硬化してな
り、 かつ、当該止水性軽量発泡硬化体に対する前記アスファ
ルト乳剤の含有率が５〜２０ｖｏｌ％である ことを特徴
とする止水性軽量発泡硬化体。(57) [Claims] [Claim 1] Embankment material in civil engineering and construction work
A waterstop lightweight foamed cured product is used as a ground material for backfilling material such as a hydraulic curing agent, and foaming agent, a quick-setting admixture, and water, it was cured by mixing and asphalt emulsion
And the asphalt for the water-resistant lightweight foamed cured product
A water- resistant lightweight foamed cured product, wherein the content of the emulsion is from 5 to 20 vol% .
JP15090293A 1993-06-22 1993-06-22 Waterproof lightweight foamed cured product Expired - Fee Related JP3451110B2 (en)

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Publication number Priority date Publication date Assignee Title
US8124183B2 (en) 2006-08-11 2012-02-28 Tremco Incorporated Fast drying emulsion systems
CN108947400A (en) * 2018-08-13 2018-12-07 上海茜梓建材科技有限公司 A kind of floor heating, sedimentation compartment, ground, roofing light-weight water-proof fill alignment material

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