It focuses on the theory of the mineral functional materials " improving the anti - chloride permeability and the chloride binding. the main achievements of this article include : 1 ) use the technology of xrd, sem, bet, laser particle size distributor etc to test the component, the construction, particle size distributor, specific surface etc of micro - silica, ultra - fined slag, high quality fly ash, meta - kaolin clay, four types of the mineral functional material, theoretically analysis the functions which the four mineral functional minerals act on cement concrete, namely pozzolanicity effect, filling effect, micro - aggregate effect, surface adsorption effect and so bring into play the affect of plastification, lowing of temperature, reinforcement, improvement of durability. base on this analysis we can conclude that the proper diameter of the mineral functional material is 5 m - 15 m, that is blain fineness 4500cm2 / g - 7500cm2 / g
本論文的主要成果包括以下幾個方面: ( 1 )採用xrd 、 sem 、 bet 、激光粒度分析儀等多種測試手段,探明了以硅
灰,超細磨粒化高爐礦渣,優質粉煤
灰及偏高嶺土超細粉等4種超細礦物功能材料的組成、結構、粒度分佈、比表面積等基本性質;從理論上分析了礦物功能材料在混凝土中的4種效應,即
火山
灰效應、填充密實效應、微集料效應、表面吸附效應,並由此發揮出增塑、溫峰削減(降熱) ,增強及耐久性改善等作用;通過相關理論分析,推導出礦物功能材料的合理粒徑范圍在5 m 15 m ,即勃氏比表面積為4500cm ~ 2 g 7500cm ~ 2 g 。
Fires have burnt out more than 800, 000 hectares 3, 000 square miles of bushland in the southern state of victoria - an area the size of cyprus - and on thursday were threatening several towns and a major ski resort
這場大
火已經將位於該國南部維多利亞州境內的超過80萬公頃的未開墾森林地區燒成
灰燼,這幾乎等同於塞普勒斯的國土面積。
Fires have burnt out more than 800, 000 hectares ( 3, 000 square miles ) of bushland in the southern state of victoria - - an area the size of cyprus - - and on thursday were threatening several towns and a major ski resort
這場大
火已經將位於該國南部維多利亞州境內的超過80萬公頃的未開墾森林地區燒成
灰燼,這幾乎等同於塞普勒斯的國土面積。
The eruptions were associated with the development of several giant craters ( calderas )
大量熔巖和
火山
灰噴出,
火山爆發形成多個破
火山口。
Barracks : build rocketmen and riflemen, to a ratio that you like. i prefer three riflemen to six rocketmen ratios, but i generally don ' t use much infantry, mostly as cannon fodder
兵營:建造
火箭兵和機槍兵,按照你喜歡的比例建造。我喜歡三個機槍兵搭配六個
火箭兵的比例,但是我通常不大用步兵,他們大多是作炮
灰。
The ash, cinders, and other fragments become a consolidated rock.
火山
灰、
火山渣和其它碎屑變成了固結的巖石。
The romans discovered that a mixture of quicklime, volcanic ash and aggregate would harden under water - the roman cement or hydraulic lime was born
生石
灰,
火山巖
灰燼和其它混合物在水的作用下會變硬的特性由此羅馬水泥或水化石
灰就誕生了。
Influence of chemical activators on the pozzolanic property 0f reject fly ash
化學激發劑對廢棄粗粉煤
灰火山
灰活性的影響
Ash and cinder cone
凝
灰火山渣錐
Pulverized particulate matter ejected by volcanic eruption
火山灰火山爆發噴射出來的粉末狀顆粒物質