CAJ | 학술논문

水下不分散混凝土已被广泛应用于实际工程中.目前大多数的研究侧重于对其施工性能的改善,而有关其力学及耐久性能研究则鲜见报道.依据优选原材料及外加剂匹配试验,设计9种配合比,在配合比满足强度考核要求前提下,进一步开展不同介质水中水下不分散混凝土冻融试验,分析不同配比条件下,混凝土质量损失率、相对动弹性模量随冻融循环次数的变化规律.研究表明,采用的配合比不仅满足水下不分散混凝土的力学性能要求,还具有良好的抗冻融性能.相关结论可为水下不分散混凝土在水位变动区及有抗冻要求环境中的抗冻融破坏技术措施提供有效参考.
수하불분산혼응토이피엄범응용우실제공정중.목전대다수적연구측중우대기시공성능적개선,이유관기역학급내구성능연구칙선견보도.의거우선원재료급외가제필배시험,설계9충배합비,재배합비만족강도고핵요구전제하,진일보개전불동개질수중수하불분산혼응토동융시험,분석불동배비조건하,혼응토질량손실솔、상대동탄성모량수동융순배차수적변화규률.연구표명,채용적배합비불부만족수하불분산혼응토적역학성능요구,환구유량호적항동융성능.상관결론가위수하불분산혼응토재수위변동구급유항동요구배경중적항동융파배기술조시제공유효삼고.
Non-dispersible underwater concrete has been widely used in practical engineering. Currently,most of the stud-ies have focused on its construction performance, but the mechanics and durability are rarely reported. Based on the preferred raw materials and additives match test,9 kinds of concrete mix proportion is designed,under the precondition of strength re-quirements,freeze-thaw cycle tests of non-dispersible underwater concrete within different corrosive media are carried out respectively,and the variations of the concrete mass rate, relative dynamic elastic modulus variation with the freeze-thaw cy-cles were studied. The results show that the concrete mix proportions designed in this paper not only meet mechanical perfor-mance requirements but also have good freeze-thaw resistance performance. The relevant conclusions provide effective anti-freeze-thaw damage technical measures for non-dispersible underwater concrete located at water level changing area and an-tifreeze demanding environment.