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碾压混凝土筑坝技术是一种新兴的筑坝技术,在南阳回龙电站的碾压混凝土的配合比设计中,内部C15W4碾压混凝土粉煤灰掺量达到65%,外部C20W8碾压混凝土粉煤灰掺量达到60%,而规范DL5108-1999规定活性掺和料的掺量在外部混凝土中不宜超过总胶凝材料的45%,内部混凝土中宜占总胶凝材料的50%～60%,均超出规范的规定,通过现场检测,混凝土的各项性能均达到设计要求。这一技术在南阳回龙工程中的成功运用,为今后碾压混凝土坝设计中合理确定活性掺和料的掺量方面提供了宝贵经验。
RCC dam construction technology is a new dam technology. In the mix design of RCC at Nanyang Huilong Hydropower Station, the internal C15W4 roller compacted fly ash content reaches 65%, and the external C20W8 roller compacted concrete powder Coal ash content reached 60%, while the specification DL5108-1999 provisions of the content of active admixture in external concrete should not exceed 45% of the total cementitious material, internal concrete should account for 50% to 60% of the total cementitious material, , Are beyond the norms of the provisions of the site testing, the performance of concrete meet the design requirements. The successful application of this technology in Nanyang Huilong Project provided valuable experience for rationally determining the content of reactive admixture in RCC dam design.