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活性粉末混凝土(RPC)抗压强度的工艺影响因素分析 被引量:2
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作者 姚瑶 徐岩 +1 位作者 赵俭斌 谷丹 《北方交通》 2018年第1期35-38,43,共5页
以典型的活性粉末混凝土(RPC)配方为研究对象,以典型拌合、成型和养生工艺制备RPC。研究了不同拌和工艺条件下RPC拌和物的和易性、流动性与其抗压强度之间的关系;同时,研究了不同养生制度条件下RPC抗压强度的差异。根据试验结果,分析影... 以典型的活性粉末混凝土(RPC)配方为研究对象,以典型拌合、成型和养生工艺制备RPC。研究了不同拌和工艺条件下RPC拌和物的和易性、流动性与其抗压强度之间的关系;同时,研究了不同养生制度条件下RPC抗压强度的差异。根据试验结果,分析影响典型RPC抗压强度的主要工艺因素,为进一步优化RPC配比、提高RPC的理化性能提供了直接试验依据和经验参考。 展开更多
关键词 活性粉末混凝土 水泥混凝土 抗压强度 养生制度 拌和工艺
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The Biblical Sabbatical Year and Its Implications for Ecology: An Exegesis of Exodus 23:10-11
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作者 Daniel Kwame Bediako 《Journal of Environmental Science and Engineering(A)》 2013年第6期377-380,共4页
Exod 23:10-12 enjoins Israel to keep both a seventh-year Sabbath and a seventh-day Sabbath. The juxtaposition of these two Sabbaths in the text suggests a connection between the Sabbath and ecology, since rest and no... Exod 23:10-12 enjoins Israel to keep both a seventh-year Sabbath and a seventh-day Sabbath. The juxtaposition of these two Sabbaths in the text suggests a connection between the Sabbath and ecology, since rest and nourishment are required both the land and its inhabitants (i.e., humans and beasts). This article exegetically analyzes Exod 23:10-12 and suggests some possible ecological implications. Accordingly, it is argued that while the biblical sabbatical year seems to have required a rest for the whole land--a practice which may seem impossible today--in modern times heavily cultivated portions of land could be allowed to lie fallow. Instead of overusing particular portions of land with the aid of agro-chemicals, farming systems such as land rotation could fruitfully be practiced. Such a practice may not only allow cultivable lands regain fertility, it may also contribute towards the sustenance of the wild including endangered species. This study may be particularly useful in the African context. 展开更多
关键词 Sabbatical ECOLOGY LAND CULTIVATION trees.
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Research on Pension Insurance System under the Background of Aging
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作者 WANG Chunqing 《International English Education Research》 2016年第5期40-42,共3页
With the rapid development of economy in our country, the level of science and technology innovation, all of these prolong the life span of our life. Thus an aging population are increasingly highlight, which are deep... With the rapid development of economy in our country, the level of science and technology innovation, all of these prolong the life span of our life. Thus an aging population are increasingly highlight, which are deeply and widely influenced our society, economy, life and other aspects. As the basic insurance which maintain the elderly's life quality after they retired, Pension insurance will promove social stability and development. How to reform Pension insurance under the background of the aging of the population will get more and more attention from people. This article starts with the concept of the aging of the population and its development trend. Next, the article analyses the problems of Pension Insurance under the background of the aging of the population. Last, the article summarizes countermeasures according to solve these matters. 展开更多
关键词 the aging of population pension insurance
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