分析建筑垃圾特性对提高建筑垃圾循环再利用使用范围和使用空间,推动我国城市建筑垃圾回收再利用产业化发展具有深远意义,提出了基于激光粒度分析仪的建筑垃圾特性分析方法。该方法以某建筑拆迁工程项目作为研究基础,选取该建筑拆迁工...分析建筑垃圾特性对提高建筑垃圾循环再利用使用范围和使用空间,推动我国城市建筑垃圾回收再利用产业化发展具有深远意义,提出了基于激光粒度分析仪的建筑垃圾特性分析方法。该方法以某建筑拆迁工程项目作为研究基础,选取该建筑拆迁工程项目中的废弃混凝土作为研究对象,在充分分析马尔文MS3000激光粒度分析仪工作原理基础上,选取了最佳泵速、分散模式、光学浓度等实验参数,测试了废弃混凝土样品浓度、激光粒度分析仪超声分散频率、超声分散时间、分散剂以及不同测量精度激光粒度分析仪对建筑垃圾粒径检测结果的影响,测试结果显示,马尔文MS3000激光粒度分析仪能够实现建筑垃圾粒径分布的准确检测,选取水作为分散剂、控制样品浓度水平在5 g/L^15 g/L,超声分散频率不小于40 k Hz,超声分散时间在10min以上能够获得较好的样品分散效果。展开更多
Water is the most active component in all geological systems. It has an importanteffect on the physical properties of minerals and melts. It also plays a key role in the evolutionof the Earth. Accurate thermodynamics ...Water is the most active component in all geological systems. It has an importanteffect on the physical properties of minerals and melts. It also plays a key role in the evolutionof the Earth. Accurate thermodynamics data on water are currently confined to pressures below1.0 GPa and temperatures below 900℃. Presented in this paper are new data available on theP-T properties of water at pressures up t0 5. 0 GPa, developed from differential thermal analysis and ultrasonic wave amplitude analysis. It has been found that there may exist anotherternary point at 3. 0 GPa and that ultrasonic wave amplitude change of ice-water transitionshows two inflection points above 2. 0 GPa, consistent with the two peaks of differential thermal curves above 2. 0 GPa. It may be a new phenomenon which needs further study.展开更多
文摘分析建筑垃圾特性对提高建筑垃圾循环再利用使用范围和使用空间,推动我国城市建筑垃圾回收再利用产业化发展具有深远意义,提出了基于激光粒度分析仪的建筑垃圾特性分析方法。该方法以某建筑拆迁工程项目作为研究基础,选取该建筑拆迁工程项目中的废弃混凝土作为研究对象,在充分分析马尔文MS3000激光粒度分析仪工作原理基础上,选取了最佳泵速、分散模式、光学浓度等实验参数,测试了废弃混凝土样品浓度、激光粒度分析仪超声分散频率、超声分散时间、分散剂以及不同测量精度激光粒度分析仪对建筑垃圾粒径检测结果的影响,测试结果显示,马尔文MS3000激光粒度分析仪能够实现建筑垃圾粒径分布的准确检测,选取水作为分散剂、控制样品浓度水平在5 g/L^15 g/L,超声分散频率不小于40 k Hz,超声分散时间在10min以上能够获得较好的样品分散效果。
文摘Water is the most active component in all geological systems. It has an importanteffect on the physical properties of minerals and melts. It also plays a key role in the evolutionof the Earth. Accurate thermodynamics data on water are currently confined to pressures below1.0 GPa and temperatures below 900℃. Presented in this paper are new data available on theP-T properties of water at pressures up t0 5. 0 GPa, developed from differential thermal analysis and ultrasonic wave amplitude analysis. It has been found that there may exist anotherternary point at 3. 0 GPa and that ultrasonic wave amplitude change of ice-water transitionshows two inflection points above 2. 0 GPa, consistent with the two peaks of differential thermal curves above 2. 0 GPa. It may be a new phenomenon which needs further study.
