A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
CURING AGENT FOR GROUND STABILIZING CHEMICAL, AND GROUND STABILIZING CHEMICAL
PROBLEM TO BE SOLVED: To provide a curing agent for ground stabilization, which allows effective use of inexpensive gypsum by-produced in hydrogen fluoride production as an alkali-based silicate curing agent for ground stabilization, can stabilize diversified and complicated ground more surely and more highly, and can be used also for many other purposes and applications.SOLUTION: Provided is a curing agent for a ground stabilizing chemical that includes a liquid A comprising an aqueous alkali silicate solution and a liquid B, which are injected into the ground and cured in the ground to stabilize the ground, the liquid B being an aqueous slurry formed by dispersing in water: an anhydrous gypsum composition obtained by adding one or two or more alkaline materials to 100 pts.mass of gypsum by-produced in hydrogen fluoride production in an amount to neutralize free sulfuric acid contained in the by-produced gypsum or more and 500 pts.mass or less, followed by mixing, pulverization, and classification; a surfactant in a content of 0.35 or more and 1.25 pts.mass or less relative to a total of 100 pts.mass of the anhydrous gypsum composition and a curing enhancer/promotor; a defoaming agent in a content of 0.51 or more and 200 pts.mass or less relative to 100 pts.mass of the surfactant; and, if necessary, the curing enhancer/promotor.
【課題】珪酸アルカリ系地盤安定化用硬化剤として、安価なフッ酸副生石膏を有効活用し、多様化・複雑化した地盤の安定化をより確実、より安定化できると共に、多目的・多用途にも活用できる地盤安定化用硬化剤を提供する。【解決手段】珪酸アルカリ水溶液からなるＡ液と、フッ酸副生石膏とフッ酸石膏１００質量部に対して、該フッ酸副生石膏に含有する遊離の硫酸を中和する量以上〜５００質量部以下のアルカリ性物質を１種または２種以上を添加して、混合、粉砕・分級処理して得た無水石膏組成物と、該無水石膏組成物と硬化促進増強剤の合計１００質量部に対して、界面活性剤の含有量を０．３５以上１．２５質量部以下と界面活性剤１００質量部に対して消泡剤の含有量を０．５１以上２００質量部以下を含有し、必要に応じて硬化促進増強剤を水に分散してなる水性スラリーのＢ液を地盤中に注入し、地盤中で硬化させて地盤を安定化させる地盤安定化薬液用硬化剤。【選択図】なし
CURING AGENT FOR GROUND STABILIZING CHEMICAL, AND GROUND STABILIZING CHEMICAL
PROBLEM TO BE SOLVED: To provide a curing agent for ground stabilization, which allows effective use of inexpensive gypsum by-produced in hydrogen fluoride production as an alkali-based silicate curing agent for ground stabilization, can stabilize diversified and complicated ground more surely and more highly, and can be used also for many other purposes and applications.SOLUTION: Provided is a curing agent for a ground stabilizing chemical that includes a liquid A comprising an aqueous alkali silicate solution and a liquid B, which are injected into the ground and cured in the ground to stabilize the ground, the liquid B being an aqueous slurry formed by dispersing in water: an anhydrous gypsum composition obtained by adding one or two or more alkaline materials to 100 pts.mass of gypsum by-produced in hydrogen fluoride production in an amount to neutralize free sulfuric acid contained in the by-produced gypsum or more and 500 pts.mass or less, followed by mixing, pulverization, and classification; a surfactant in a content of 0.35 or more and 1.25 pts.mass or less relative to a total of 100 pts.mass of the anhydrous gypsum composition and a curing enhancer/promotor; a defoaming agent in a content of 0.51 or more and 200 pts.mass or less relative to 100 pts.mass of the surfactant; and, if necessary, the curing enhancer/promotor.
【課題】珪酸アルカリ系地盤安定化用硬化剤として、安価なフッ酸副生石膏を有効活用し、多様化・複雑化した地盤の安定化をより確実、より安定化できると共に、多目的・多用途にも活用できる地盤安定化用硬化剤を提供する。【解決手段】珪酸アルカリ水溶液からなるＡ液と、フッ酸副生石膏とフッ酸石膏１００質量部に対して、該フッ酸副生石膏に含有する遊離の硫酸を中和する量以上〜５００質量部以下のアルカリ性物質を１種または２種以上を添加して、混合、粉砕・分級処理して得た無水石膏組成物と、該無水石膏組成物と硬化促進増強剤の合計１００質量部に対して、界面活性剤の含有量を０．３５以上１．２５質量部以下と界面活性剤１００質量部に対して消泡剤の含有量を０．５１以上２００質量部以下を含有し、必要に応じて硬化促進増強剤を水に分散してなる水性スラリーのＢ液を地盤中に注入し、地盤中で硬化させて地盤を安定化させる地盤安定化薬液用硬化剤。【選択図】なし
CURING AGENT FOR GROUND STABILIZING CHEMICAL, AND GROUND STABILIZING CHEMICAL
地盤安定化薬液用硬化剤および地盤安定化薬液
TAZAWA SHUNSUKE (author)
2016-01-28
Patent
Electronic Resource
Japanese
| European Patent Office | 2021
Solidifying agent composition for soft ground and method for stabilizing soft ground using the same
| European Patent Office | 2022