MECHANICAL PROPERTIES OF FOAMED MIXTURE LIGHTWEIGHT SOIL CONTAINING

泡沫轻质土混合料的力学性能

• 批准号: 17560444
• 负责人: KAMEI Takeshi
• 金额: $ 2.3万
• 依托单位: Shimane University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560444/
• 关键词: lightweight soil; unconfined compressive strength; soil stabilization; coal ash; PET bottle; soil structure; stress-strain relation; temperature effect; 産業廃棄物; 内部構造

Lightweight soil technology has been widely used in construction projects to solve soft ground problems. The major advantages offered by the technology are reduced foundation soil improvement costs and reduced construction time due to the reduced loading on the ground. Previous work, however, has shown the maximum temperature inside field test bodies reaches about ninety degree Celsius. On the other hand, industrial waste disposal is an increasing problem. It is, therefore, becoming increasingly important for technology and engineering design to be utilized effectively for industrial waste disposal.This study describes the influences of initial high temperature curing histories on unconfined compressive strength and microstructure of foamed mixture lightweight soil containing coal ash and flaky PET bottle wastes to promote industrial waste recycling. Comparisons are made between foamed mixture lightweight soil and foamed mixture lightweight soil mixed with coal ash and flaky PET wastes. The effects of coal ash and flaky PET bottle on stress-strain behavior of foamed mixture lightweight soils are quantitatively demonstrated. These properties make coal ash and flaky PET bottle wastes useful as a construction material. Observation of internal structures suggests that decrease in unconfined compressive strength with increased initial curing temperature is attributable to structural change induced by heating, in which small uniformly distributed air bubbles become connected to each other and form large cavities. On the other hand, a stress-strain relation that consists of two hyperbolic models was applied to investigate the mechanical behavior of foamed mixture lightweight soil. Reasonable agreement was obtained between the observed and the simulated results of stress-strain relation of foamed mixture lightweight soil with high temperature histories. The potential use of coal ash and flaky PET bottle wastes can be refined with further research.

轻质土技术已被广泛应用于工程建设中，以解决软土地基问题。该技术提供的主要优势是降低了地基土改良成本，并由于减少了地面荷载而缩短了施工时间。然而，之前的研究表明，野外测试体内部的最高温度约为90摄氏度。另一方面，工业废物处理是一个日益严重的问题。因此，有效地利用技术和工程设计来处理工业废物变得越来越重要。为了促进工业废物的回收利用，本研究描述了初始高温养护历史对含有粉煤灰和片状PET瓶废料的发泡混合物的无侧限抗压强度和微观结构的影响。比较了发泡混合轻质土与掺有粉煤灰和片状聚酯废料的发泡混合轻质土的性能。定量研究了粉煤灰和片状聚对苯二甲酸乙二醇酯(PET)瓶对发泡混合轻质土应力应变特性的影响。这些特性使火山灰和片状聚酯瓶废料可用作建筑材料。对内部结构的观察表明，随着初始固化温度的升高，无侧限抗压强度的下降是由于加热引起的结构变化，在这些结构中，均匀分布的小气泡相互连接并形成大空腔。另一方面，采用由两个双曲线模型组成的应力-应变关系，研究了泡沫混合轻质土的力学行为。具有高温历史的泡沫混合轻质土应力应变关系的观测结果与数值模拟结果吻合较好。随着研究的深入，煤灰渣和片状聚对苯二甲酸乙二醇酯(PET)瓶子废料的潜在利用潜力可以得到提炼。

项目成果

Effects of initial high temperature curing on unconfined compressive strength and microstructure of foamed mixture lightweight soil

初始高温养护对泡沫混合料轻质土无侧限抗压强度及微观结构的影响

• 发表时间: 2006
• 期刊: Memoirs of the Faculty of Science and Engineering Shimane University, Series A 40
• 作者: 軽部大蔵;宇野尚雄;宇野 尚雄;亀井健史;亀井健史;亀井健史;亀井健史;Takeshi Kamei
• 通讯作者: Takeshi Kamei

EFFECT OF DIFFERENT HIGH TEMPERATURE HISTORIES UNDER INITIAL CURING ON STRESS-STRAIN RELATIONSHIP OF FOAMED MIXTURE LIGHTWEIGHT SOIL AND ITS MODEL SIMULATION

初始养护不同高温历程对泡沫混合轻质土应力应变关系的影响及模型模拟

• 发表时间: 2006
• 期刊: JOURNAL OF STRUCTURES AND MATERIALS IN CIVIL ENGINEERING 22
• 作者: 軽部大蔵;宇野尚雄;宇野 尚雄;亀井健史;亀井健史;亀井健史;亀井健史;Takeshi Kamei;亀井健史;TAKESHI KAMEI;TAKESHI KAMEI
• 通讯作者: TAKESHI KAMEI

気泡混合軽量土の応力ーひずみ関係に及ぼす異なる初期高温履歴の影響とそのモデル化

不同初始高温历史对加气轻质土应力应变关系的影响及其建模

• 发表时间: 2006
• 期刊: 土木構造・材料論文集 22
• 作者: 軽部大蔵;宇野尚雄;宇野 尚雄;亀井健史;亀井健史
• 通讯作者: 亀井健史

気泡混合軽量土の応力-ひずみ関係に及ぼす異なる初期高温履歴の影響とそのモデル化

不同初始高温历史对加气轻质土应力应变关系的影响及其建模

• 发表时间: 2006
• 期刊: 土木構造・材料論文集 ・22
• 作者: 軽部大蔵;宇野尚雄;宇野 尚雄;亀井健史;亀井健史;亀井健史;亀井健史;Takeshi Kamei;亀井健史;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;亀井健史
• 通讯作者: 亀井健史

異なる所期高温養生履歴がフレーク状PETボトルを混入した気泡混合軽量土の一軸圧縮強さとその内部構造に及ぼす影響

不同初始高温养护历史对片状PET瓶掺气轻质土无侧限抗压强度和内部结构的影响

• 发表时间: 2006
• 期刊: 島根大学総合理工学部紀要シリーズA 40
• 作者: 軽部大蔵;宇野尚雄;宇野 尚雄;亀井健史;亀井健史;亀井健史;亀井健史;Takeshi Kamei;亀井健史;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;TAKESHI KAMEI;亀井健史;亀井健史;Takeshi Kamei;亀井健史
• 通讯作者: 亀井健史