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采用高强混凝土,对减轻结构物自重,节省水泥和钢材,以及对节省能源都具有重要意义。目前采用正常工艺配制的600~＃以上混凝土,已在我国某些特殊工程中使用。在国外,挪威从一九七二年至一九八四年,海上采油平台所用混凝土标号已从400~＃提高到600~＃(φ150×300~(mm)圆柱体强度),并考虑近期在钢筋混凝土采油平台上采用800~＃混凝土。然而由于目前采用的高强混凝土水灰比很小,所以其拌合
The use of high-strength concrete is important for reducing the weight of structures, saving cement and steel, and saving energy. At present, the 600~# concrete prepared using the normal process has been used in some special projects in China. In foreign countries, from 1972 to 1984 in Norway, the number of concrete used on offshore oil platforms has been increased from 400 to # 600 (φ150 × 300 mm cylinder strength), and considering the recent 800~# concrete is used on the reinforced concrete platform. However, due to the very low water cement ratio of the high-strength concrete currently used, its mixing