建筑工程用泵送高抛自密实混凝土的硬化性能研究  

Study on the hardened properties of pumped high throw self-compacting concrete for construction engineering

作　　者：朱双珂 陈奕涵 吴晓华 ZHU Shuangke;CHEN Yihan;WU Xiaohua(China Railway Urban Construction Group No.1 Engineering Co.,Ltd.,Taiyuan 030000;School of Civil Engineering,Central South University,Changsha 410075)

机构地区：[1]中铁城建集团第一工程有限公司,山西太原030000 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《中国建材科技》2024年第4期32-36,共5页China Building Materials Science & Technology

基　　金：国家自然科学基金(52078490)。

摘　　要：研究了泵送高抛自密实混凝土的硬化性能,通过控制水胶比与胶凝材料总量等关键参数,采用粉煤灰与矿粉双掺25%的配比制备了满足泵送要求的C40自密实混凝土。由试验可知,随着水胶比的降低,自密实混凝土强度、弹性模量提升的同时电通量降低;随着胶凝材料总量的增加,自密实混凝土同样强度得到提升且电通量降低,但与弹性模量相关性不大。所制备的泵送C40自密实混凝土28d抗压强度为53.4MPa、56d抗压强度为61.3MPa及电通量为764C,各项指标均满足规范要求,较好满足了混凝土硬化性能的需要,表明具有优异的强度和耐久性。This paper investigates the hardening properties of pumped high-throw self-compacting concrete.By controlling key parameters such as the water-binder ratio and total amount of cementitious materials,a C40 selfcompacting concrete that meets the pumping requirements is prepared with 25%ratio of fly ash and mineral powder.The experiments show that as the water-binder ratio decreases,the strength and elastic modulus of self-compacting concrete increase while the electrical flux decreases.With the increase of the total amount of cementitious materials,the strength of self-compacting concrete is also improved and the electrical flux is reduced,but the correlation with the elastic modulus is not significant.The 28-day compressive strength of the prepared C40 self-compacting concrete is 53.4MPa,the 56-day compressive strength is 61.3MPa,and the electrical flux is 764C.All indicators meet the standard requirements and the needs of concrete hardening performance,indicating it possesses excellent strength and durability.

关 键 词：建筑工程 泵送 高抛 自密实混凝土 硬化性能 

分 类 号：TU528[建筑科学—建筑技术科学]