海水海砂珊瑚混凝土间隙通过性能研究  

A Comprehensive Study on the Passing Ability of Seawater Sea-sand Coral Aggregate Concrete

作　　者：赖勉亨 卢锐勤 宋琢 田时雨 任凤鸣[1] LAI Mian-heng;LU Rui-qin;SONG Zuo;TIAN Shi-yu;REN Feng-ming(School of Civil Engineering and Transportation,Guangzhou University,Guangzhou 510006;Canton One Construction Group Co.,Ltd.,Guangzhou 511457)

机构地区：[1]广州大学土木与交通工程学院,广州510006 [2]广州一建建设集团有限公司,广州511457

出　　处：《广州建筑》2025年第3期79-84,共6页GUANGZHOU ARCHITECTURE

基　　金：广东省基础与应用基础研究基金(2022A1515240067)。

摘　　要：研究采用海水、海砂(Sea sand,SS)和珊瑚骨料(Coral aggregate,CA)分别替代河水、天然河砂和天然粗骨料,制备海水海砂珊瑚混凝土(Seawater sea-sand coral aggregates concrete,SSCAC)。然而,由于珊瑚骨料表面粗糙多孔,导致浆体与其摩擦力增加,从而影响海水海砂珊瑚混凝土的间隙通过性。解决这一问题的关键在于优化海水海砂珊瑚混凝土的流变性能,可以通过掺入硅粉(Silica fume,SF)替代部分水泥来实现,并同时使用适量的减水剂(Superplasticizer,SP)来提高海水海砂珊瑚混凝土的湿法堆积密度(Wet packing density,WPD)。本试验共设计了12组不同硅粉替代率(0%和10%)和不同减水剂剂量的海水海砂珊瑚混凝土配合比,并测试其流动性、间隙通过性、湿法堆积密度、离析指数和抗压强度。结果表明:适量的硅粉和减水剂的加入提高了海水海砂珊瑚混凝土的湿法堆积密度,从而改善了抗离析性能,增强了流动性,最终提高了间隙通过性。The study used seawater,sea sand(SS),and coral aggregates(CA) to replace river water,natural river sand,and natural coarse aggregates,respectively,to prepare seawater sea sand coral aggregates concrete(SSCAC).However,due to the rough and porous surface of coral aggregate,the friction between the slurry and it increases,thereby affecting the gap permeability of seawater sand coral concrete.The key to solving this problem lies in optimizing the rheological properties of seawater sand coral concrete,which can be achieved by adding silica fume(SF) instead of some cement,and using an appropriate amount of superplasticizer(SP)to increase the wet packing density(WPD) of seawater sand coral concrete.This experiment designed a total of 12 sets of seawater sea sand coral concrete mix proportions with different silicon powder substitution rates(0% and 10%) and different water reducing agent dosages,and tested their flowability,gap permeability,wet bulk density,segregation index,and compressive strength.The results showed that the addition of appropriate amounts of silicon powder and water reducing agents increased the wet packing density of seawater sand coral concrete,thereby improving its anti segregation performance,enhancing its flowability,and ultimately improving its gap permeability.

关 键 词：海水海砂珊瑚混凝土 间隙通过性 硅粉 湿法堆积密度 

分 类 号：TU528[建筑科学—建筑技术科学]