[1]陈海霞,张志权,宋学庆.再生骨料喷射混凝土基本性能试验[J].西安科技大学学报,2020,(03):434-440.[doi:10.13800/j.cnki.xakjdxxb.2020.0308]
 CHEN Hai-xia,ZHANG Zhi-quan,SONG Xue-qing.Basic performance testing on shotcrete with recycled aggregate[J].Journal of Xi'an University of Science and Technology,2020,(03):434-440.[doi:10.13800/j.cnki.xakjdxxb.2020.0308]
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再生骨料喷射混凝土基本性能试验(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2020年03期
页码:
434-440
栏目:
出版日期:
2020-05-15

文章信息/Info

Title:
Basic performance testing on shotcrete with recycled aggregate
文章编号:
1672-9315(2020)03-0434-07
作者:
陈海霞1张志权2宋学庆3
(1.中煤西安设计工程有限责任公司,陕西 西安 710054; 2.长安大学 建筑工程学院 陕西 西安 710061; 3.信息产业部电子综合勘察研究院,陕西 西安 710054)
Author(s):
CHEN Hai-xia1ZHANG Zhi-quan2SONG Xue-qing3
(1.China Coal Xi'an Design Engineering Company Limited,Xi'an 700054,China; 2.School of Civil Engineering,Chang'an University,Xi'an 700061,China; 3.China Electronic Research Institute of Engineering Investigation and Design,Xi'an 700054,China)
关键词:
再生骨料 喷射混凝土 坍落度 回弹率 超声波速 密度 强度
Keywords:
recycled aggregate shotcrete slump rebound rate ultrasonic speed density strength
分类号:
TU 528.53
DOI:
10.13800/j.cnki.xakjdxxb.2020.0308
文献标志码:
A
摘要:
为了研究再生骨料喷射混凝土的相关性能,配制了5组混凝土,其再生骨料体积掺量依次为0%,25%,50%,75%和100%,对5组混凝土的坍落度、回弹率、超声波速、粘结强度、抗压强度、劈裂抗拉强度、弹性模量和密度进行了测试。试验数据显示:对应于再生骨料体积掺量依次为0%,25%,50%,75%和100%,喷射混凝土坍落度分别为185,187,183,176和172 mm,回弹率分别为22.1%,17.5%,19.6%,18.7%和15.2%,超声波速分别为4.82,4.75,4.54,4.51和4.48 km/s,粘结强度分别为1.21,1.24,1.21,1.26和1.22 MPa,抗压强度分别为40.2,36.3,32.8,31.5和30.3 MPa,劈裂抗拉强度分别为3.53,3.3,3.21,3.19和3.05 MPa,弹性模量分别为32.5,32.2,28.3,26.3和25.8 GPa,密度分别为2 188,2 185,2 150,2 135和2 125 kg/m3。结果表明:再生骨料喷射混凝土回弹率和粘结强度这2个指标优于天然骨料喷射混凝土; 坍落度、超声波速、抗压强度、劈裂抗拉强度、弹性模量和密度均随再生骨料体积掺量的增加而减小; 抗压强度、劈裂抗拉强度、弹性模量和密度与超声波速之间明显线性相关。
Abstract:
In order to study the related properties of recycled aggregate shotcrete,5 groups of shotcrete were prepared,and the volume incorporation of recycled aggregate was 0%,25%,50%,75%,100%,and the slump,rebound rate,ultrasonic speed,bond strength,compressive strength,splitting tensile strength,modulus of elasticity and density of 5 groups of shotcrete were tested.The test data shows that the volume incorporation of the recycled aggregate were 0%,25%,50%,75%,100%,and the shotcrete slumps were 185,187,183,176 and 172 mm,respectively.The rebound losses were 22.1%,17.5%,19.6%,18.7%,and 15.2%,respectively.The ultrasonic speeds were 4.82,4.75,4.54,4.51 and 4.48 km/s,respectively.The bond strengths were 1.21,1.24,1.21,1.26 and 1.22 MPa,respectively.The compressive strengths were 40.2,36.3,32.8,31.5 and 30.3 MPa,respectively.The splitting tensile strength were 3.53,3.3,3.21,3.19 and 3.05 MPa,respectively.The elastic moduli were 32.5,32.2,28.3,26.3 and 25.8 GPa,respectively.The densities were 2 188,2 185,2 150,2 135 and 2 125 kg/m3,respectively.An examination of the previous results reveals that the two indexes of recycled aggregate shotcrete rebound rate and bond strength are better than those of natural aggregate shotcrete.Slump,ultrasonic speed,compressive strength,splitting tensile strength,elastic modulus and density decrease with the increase of volume incorporation of recycled aggregate.The compressive strength,splitting tensile strength,elastic modulus,density are obviously linearly related with ultrasonic velocity.

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备注/Memo

备注/Memo:
收稿日期:2019-01-11 责任编辑:杨忠民
基金项目:国家自然科学基金(51379015)
更新日期/Last Update: 2020-05-15