CAJ | 학술논문

针对百色水利枢纽大坝辉绿岩骨料碾压混凝土存在骨料分离多、均匀性较差、可碾性较差、弹性模量高、极限拉伸值低等问题，首次提出适当减小大坝碾压混凝土粗骨料的最大粒径，由80 mm 减为60 mm，大坝采用准三级配碾压混凝土的设想，对准三级配碾压混凝土与三级配碾压混凝土进行对比试验研究。研究结果表明：在不增加水泥用量和胶凝材料用量的情况下，准三级配碾压混凝土骨料分离明显减少，均匀性和密实性明显提高，可碾性和工作性明显改善，弹性模量降低13%，极限拉伸值提高10%，各项性能均满足设计要求。百色水利枢纽大坝采用准三级配碾压混凝土，有效地改善了大坝碾压混凝土工作性能和变形性能，提高了抗裂性能和层间结合性能，保证了工程质量。
침대백색수리추뉴대패휘록암골료년압혼응토존재골료분리다、균균성교차、가년성교차、탄성모량고、겁한랍신치저등문제，수차제출괄당감소대패년압혼응토조골료적최대립경，유80 mm 감위60 mm，대패채용준삼급배년압혼응토적설상，대준삼급배년압혼응토여삼급배년압혼응토진행대비시험연구。연구결과표명：재불증가수니용량화효응재료용량적정황하，준삼급배년압혼응토골료분리명현감소，균균성화밀실성명현제고，가년성화공작성명현개선，탄성모량강저13%，겁한랍신치제고10%，각항성능균만족설계요구。백색수리추뉴대패채용준삼급배년압혼응토，유효지개선료대패년압혼응토공작성능화변형성능，제고료항렬성능화층간결합성능，보증료공정질량。
According to the dam with diabase aggregate roller compacted concrete of baise project,there was aggregate separation,lack of homogeneity,rolling resistance difference,modulus of elasticity was high,the ultimate tensile value was low,proposes for the first time reduced the biggest size of coarse aggregate from 80 mm to 60 mm,roller compacted concrete witn quasi-tri-graded was used in dam, comparison test research between roller compacted concrete witn quasi-tri-graded and tri-graded,The results of the study showed that, without any increase in cement dosage and cementing material,concrete aggregate separation significantly reduced,uniformity and compact sex obviously improved,grinding and workability obviously improved,elastic modulus was reduced by 13% and ultimate tensile value increased by 10%,various performance could meet the design requirements.Roller compacted concrete with quasi-tri-graded was used in baise dam,effectively improved the working performance and deformation performance,crack resistance and interlayer bonding properties,obviously improved,ensured the engineering quality.