摘要
为改善水泥混凝土的早期力学性能,通过无机盐、络合剂以及聚合物的复合得到早强剂,考察早强剂对硅酸盐水泥1 d强度的影响,测试了水泥水化24 h的钙离子浓度及水化热,利用XRD和SEM研究了其微观结构。研究表明:复合早强剂可显著提高水泥的1 d强度。在3.0%掺量下1 d强度最大,随掺量增大强度增长幅度降低趋势;体系中钙离子浓度以及水化热显著升高,在复合早强剂掺量在3.0%时为达到最高;微观结构表征发现水化产物晶体尺寸增大,产物之间结合紧密。
In order to improve the early mechanical properties of cement and concrete,the composite early strength agent was obtained by complexing inorganic salts,complex agents and polymers accelerator,and the influence of complex accelerator on 1d strength of Portland cement was investigated,the calcium ion concentration and hydration heat of cement hydration for 24h were tested,and the samples were studied by X-ray diffraction(XRD)and scanning electron microscope(SEM).The results show that the complex accelerator can significantly improve the 1d strength of cement,and the 1d strength is the largest under 3.0% dosage,but the increasing trend slows down with the increase of the dosage.The concentration of calcium ions and the hydration heat in the system were significantly increased,which is the highest at 3.0% dosage of the complex accelerator.Microstructure characterization shows that the crystal size of the hydration products increases and the connect is closed.
作者
郭金波
郭妍妍
丁向群
佟钰
房延凤
GUO Jinbo;GUO Yanyan;DING Xiangqun;TONG Yu;FANG Yanfeng(Liaoning Transportation Planning and Design Institute Co.,Ltd.,Shenyang 110111,China;School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China)
出处
《混凝土》
CAS
北大核心
2024年第6期143-145,共3页
Concrete
基金
国家自然科学基金青年基金(51808354)
辽宁省教育厅科学研究经费项目(lnjc202017)。
关键词
水泥
复合早强剂
水化热
强度
cement
complex accelerator
hydration heat
strength
