摘要
通过开展单轴拉伸与抗压力学性能试验,系统探究了Ba Cl_(2)对高延性碱矿渣复合材料(HDASC)力学性能的影响.结果表明:当Ba Cl_(2)掺量为3.0%时,HDASC的凝结时间延长至109 min;HDASC的初裂强度、抗拉强度及抗压强度随着Ba Cl_(2)掺量的增加逐渐降低,尤其是Ba Cl_(2)掺量为3.0%时,HDASC强度的下降率高达50.0%,但其拉伸应变基本维持在6.24%~9.66%的高延性区间;Ba Cl_(2)的掺入使得HDASC的水化程度逐渐降低、孔隙数目增多,降低了基体的密实度,削弱了纤维与基体的黏结.
By uniaxial tensile and compressive tests,the effects of BaCl_(2)on the mechanical properties of high ductile alkali‑activated slag‑based composite(HDASC)were investigated.The results indicate that the addition of BaCl_(2)with 3.0%content makes the setting time prolongate to 109 min.The increase in BaCl_(2)content leads to gradual decrease in the initial cracking strength,tensile strength and compressive strength,especially the addition of 3.0%BaCl_(2)corresponds to a 50.0%decrease ratio,nevertheless,the tensile strain almost maintains the range between 6.24%-9.66%.The microscopic testing results show that the addition of BaCl_(2)incurs the decrease of hydration reaction degree of HDASC and the increase of pore numbers,thereby reducing the compactness of matrix and weakening the bonding between fibers and matrix.
作者
阚黎黎
刘能
王飞
KAN Lili;LIU Neng;WANG Fei(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2023年第12期1303-1309,共7页
Journal of Building Materials
基金
上海市自然科学基金资助项目(232R1444000)
国家自然科学基金资助项目(51978401,52008151)。
关键词
缓凝剂
氯化钡
纤维增强
碱矿渣
力学性能
retarder
BaCl_(2)
fiber‑reinforced
alkali‑activated slag
mechanical property
