期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
埋石混凝土在水利水电工程实践中的应用 被引量:6
1
作者 余侃柱 闫洋洋 《水利规划与设计》 2022年第5期96-100,共5页
埋石混凝土在水利水电工程大体积混凝土重力坝、混凝土拱坝、护坡、挡土墙、堤防等工程中广泛应用。工程实践研究,埋石混凝土节省混凝土水泥、混凝土骨料、粉煤灰、胶凝材料、外加剂的用量;减少混凝土浇筑温度裂缝、简化温控防裂措施;... 埋石混凝土在水利水电工程大体积混凝土重力坝、混凝土拱坝、护坡、挡土墙、堤防等工程中广泛应用。工程实践研究,埋石混凝土节省混凝土水泥、混凝土骨料、粉煤灰、胶凝材料、外加剂的用量;减少混凝土浇筑温度裂缝、简化温控防裂措施;分坝段、分仓、分层浇筑,提高混凝土施工质量、节约资源、保护环境、缩短建设工期、降低工程投资。结果表明:埋石混凝土实施效益显著,可在水利水电工程中推广应用,从而推动埋石混凝土应用技术的高质量发展和创新提升。 展开更多
关键词 石混凝土 埋石料 石混凝土重力坝 石混凝土拱坝 挡土墙
下载PDF
Alternative Fuels Derived from Solid Waste Plastics
2
作者 M. Sarker 《Journal of Environmental Science and Engineering》 2011年第3期316-322,共7页
The demand for fossil fuel is at an all time high worldwide. Annually-30 billion barrels of petroleum is being consumed worldwide. In this busy society, transportation is vital and, for transportation, petroleum is a ... The demand for fossil fuel is at an all time high worldwide. Annually-30 billion barrels of petroleum is being consumed worldwide. In this busy society, transportation is vital and, for transportation, petroleum is a requirement. All the major forms of business, agricultural, exports and imports depend on transportation. There are three forms of major transportation: by ground, air and sea. These transportations require petroleum to function. Vehicles in the road require gasoline/diesel, airway transportation requires aviation fuel and sea transportation requires fuel oil and other forms of fuels. For not only transportation but, petroleum is required to make all kind of daily use plastics. If the consumption of petroleum continues this way, it will be finished in the near future. Emissions released from evaporation and combustion of these fuel contribute to many environmental and health problems, including emitting greenhouse gases that contribute immensely to global warming. Annually-7 billion tons of carbon is released to the environment due to burning of petroleum. Moreover, when the plastics are discarded into the landfill, it becomes waste plastic and since plastic is non-biodegradable, it can remain in the landfill for a long time. Waste plastics presence in the landfill causes environmental problems for example, it can cause soil to decay, pollute underground water resource and cause land to be infertile. Alternative source of energy created from solar, wind, hydrogen fuel, biomass fuel, bio-diesel, green diesel, bio-ethanol, and geo-thermal has been proposed as a solution to these problems and in future with further research, these alternative sources will play an important role in the field of alternative energy. 展开更多
关键词 ALTERNATIVE energy waste plastic hydrocarbon fuel NSR fuel thermal cracking.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部