摘要
通过制备自密实微膨胀UHPC的原材料入手,分析多种因素对自密实微膨胀UHPC的性能影响,结果显示当减水剂掺量由0.3%提高到0.45%时,自密实微膨胀UHPC的抗压强度由68 MPa增加至最高抗压强度90.2 MPa;当减水剂掺量超过0.45%时,自密实微膨胀UHPC的抗压强度出现降低;在钢纤维体积掺量不超过2.5%的前提下,随着钢纤维体积掺量的增加,自密实微膨胀UHPC的抗压强度、抗折强度、抗拉强度均有所增加。结果说明应用于装配式桥梁的自密实微膨胀UHPC的结构性能受到减水剂、钢纤维体积、膨胀剂、粉煤灰微珠掺量等多种因素的共同影响。
Starting with the raw materials for preparing self-compacting micro expansion UHPC,the effects of various factors on the performance of self-compacting micro expansion UHPC are analyzed.The results show that when the content of water reducer is increased from 0.3%to 0.45%,the compressive strength of self-compacting micro expansion UHPC increases from 68 MPa to 90.2 MPa;when the content of superplasticizer exceeds 0.45%,the compressive strength of self-compacting micro expansion UHPC decreases;on the premise that the volume content of steel fiber does not exceed 2.5%,the compressive strength,flexural strength and tensile strength of self-compacting micro expansion UHPC increase with the increase of volume content of steel fiber.It can be concluded that the structural properties of self-compacting micro expansion UHPC applied to fabricated bridges are affected by many factors,such as water reducer,steel fiber volume,expansion agent,fly ash bead content and so on.
作者
蔡莉莉
孙明书
郭小坤
秦文涛
洪碧武
CAI Lili;SUN Mingshu;GUO Xiaokun;QIN Wentao;HONG Biwu(Southwest Communications Construction Group Co.,Ltd.,Kunming 650000,China)
出处
《粘接》
CAS
2022年第11期156-160,共5页
Adhesion
关键词
UHPC
自密实
减水剂
粉煤灰微珠
UHPC
self-compacting
water reducer
fly ash microsphere
