预湿与附加组合用水量对C20再生粗骨料混凝土性能影响研究  

Study on the influence of pre-wetting and additional combined water consumption on the performance of C20 recycled coarse aggregate concrete

作　　者：宋宇峰 张恩强 贺阳 王晶 冷发光 SONG Yufeng;ZHANG Enqiang;HE Yang;WANG Jing;LENG Faguang(China Railway 12th Bureau Group Co.,Ltd.,Taiyuan 030024,China;China Academy of Building Research Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中铁十二局集团有限公司,山西太原030024 [2]中国建筑科学研究院有限公司,北京100013

出　　处：《混凝土》2023年第4期155-157,共3页Concrete

摘　　要：研究了预湿与附加组合用水量对C20再生粗骨料混凝土流动性能与抗压强度的影响。结果表明,组合方式下,预湿处理后的再生粗骨料能够更加快速、充分的吸收附加用水,更便于对附加用水量的调控,且能够显著提高混凝土拌合物的流动性能保持能力,但当组合用水量过多时,再生粗骨料混凝土的28 d抗压强度整体呈降低趋势。It studies the effects of pre-wetting and additional combined water consumption on the flow properties and compressive strength of C20 recycled coarse aggregate concrete.The results show that under the combined method,the pre-wet-treated recycled coarse aggregate can absorb the additional water more quickly and fully,facilitate the control of the additional water consumption,and can significantly improve the fluidity retention capacity of the concrete mixture,but when the combined water consumption is too much,the 28 d compressive strength of recycled coarse aggregate concrete shows a downward trend as a whole.

关 键 词：预湿用水 附加用水 组合用水量 再生粗骨料混凝土 

分 类 号：TU528.01[建筑科学—建筑技术科学]