無機非金屬專業外文翻譯---粉煤灰高性能混凝土的工程應用(編輯修改稿)

　

【文章內容簡介】 ction large volume at the 4 concrete, the mixing amount of the fly ash is unsuitable to exceed 20% non. Because modern concrete China and foreign countries add use of pharmaceutical, on one hand, reducible concrete mix and stir water consumption, it reduce by dust water than,of not lasting concrete density of cement。 On the other hand, waterreducing agent can make cement silicic acid calcium ink Ca (OH ) 2 produced 2 increase, help fly ash and water two times of 2 of Ca (OH )2 to reflect , excites the activation of the fly ash, this effectual for early intensity to improve fly ash, in addition use fly ash activation excite pharmaceutical or in large volume use strong cement early among the concrete non, can pensate mixing the impact on early intensity of concrete of fly ash too. and easy Whether fly ash there are the following several points to concrete and getting easy improvement function.(1)The highquality fly ash contains more than 70% of the spherical vitreous bodies, too smooth to have raised angle the body surface of these spherical glass, performance is steady, play a kind of lubricated function which is similar to the bearing in the pump sending , shaking the course of smashing of the concrete。 (2)Mix particle apt to gather group cement in the concrete newly, to is it can disperse cement particle effectively to mix fly ash, release more thick liquid body is it lubricate aggregate to e , help concrete work the improvement of performance 。(3)Mix fly ash can pensate detailed deficiency of bits in the detailed aggregate , cut off mortar base body secrete continuity , water of channel, the fly ash that at the same time quality is good can reduce the mixing water consumption of the concrete under the same consistency, make water dust of concrete than reduce light level to , is it secrete ink and emanate the phenomenon to reduce. shrinking The shrink of the concrete relates to the fact that the mixing water consumption and thick liquid body body of the concrete are accumulated, the less water consumption is, shrink the smaller. Highquality fly ash water requirement than smaller than 100% , mix and stir reduction , water of quantity make mix fly ash concrete after the 28d since dry to shrink and not dry to shrink little. Fly ash concrete is it is it mix with fly ash improvement of quantity reduce too to contract to do. But because water , fly ash of concrete reponse slowly, moisture evaporate fast, so between fly ash and to do epitome to be loud and very much heavy in early days concrete. For prevent early shrink , fly ash of concrete from fracture , should strengthen in early days raising to it 5 creeps Issue in the past will it be age one day, intensity of concrete relatively low, issue is it it meets an emergency to be heavy than ordinary concrete too to creep corresponding age, but with ordinary concrete fly ash in one age one creep and was smaller than the ordinary concrete after this concrete of intensity. carbonization performance Fly ash concrete resist carbonization to be performance relatively poor. Cement consumption , fly ash of concrete reduce, cement water Ca (OH ) 2 too corresponding to reduce quantity that appear, and volcanic ash is it consume Ca (OH ) 2 of a certain amount too to react, make hydrogen ion index of the concrete reduce, will increase the speed of carbonization of the concrete. Unless especially at water in early days, fly ash the low in degree in response in volcanic ash,fly ash there is the loose in structure in hole in system cement, CO2 , O2 , moisture ,etc. invade obstruction small, so carbonization is relatively large in depth. With the growth of one