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前言新中国成立以来,已修建了七十余座大、中型混凝土坝,在这些坝的施工过程中,混凝土的散热降温成为一个困难问题,这不仅影响到混凝土坝的快速施工,而且一些坝由于温度控制不严,致使产生了裂缝。为了加速我国水电建设,作者设想应用低热微膨胀水泥混凝土,用高块浇筑法或通仓浇筑法以达到简化施工工艺,加速施工进度。七十年代以来,长科院在浙江大学等单位的协作下,对低热微膨胀水泥混凝土进行了大量的试验,研制成功了一种低热微膨胀水泥,并在此基础上对三座混凝土坝进行筑坝试验,1981年初,我们已完成了第一阶段的筑坝试验工作,已为中小型混凝土坝取消纵缝、通仓浇筑或高块浇筑,简化混凝土材料的冷却措施创造了条件。
Preface Since the founding of New China, more than seventy large and medium-sized concrete dams have been constructed. During the construction of these dams, the cooling of concrete is becoming a difficult problem, which not only affects the rapid construction of concrete dams, but also some of the dams due to Slight temperature control, resulting in cracks. In order to speed up hydropower construction in China, the author envisages the application of low-heat micro-expansive cement concrete, high-block pouring method or through pouring method to simplify the construction process and speed up the construction progress. Since the 1970s, under the collaboration of Zhejiang University and other institutes, the Chinese Academy of Sciences has carried out a large number of tests on low-thermal micro-expansive cement concrete. A low-thermal micro-expansive cement has been successfully developed. On the basis of this, three concrete dams Dam test. In early 1981, we completed the first phase of dam test. It has created the conditions for eliminating the longitudinal slits, pouring or pouring high blocks and simplifying the cooling of concrete materials for small and medium-sized concrete dams.