装配式建筑套筒灌浆料强度及影响因素
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摘要
为了研究装配式混凝土结构中钢筋套筒连接灌浆料的抗压强度及其影响因素,设计制作了402个灌浆料试件进行抗压强度试验,研究试件形状、尺寸和水料比(水的质量m_W与材料质量m_M之比)对其抗压强度的影响,以及不同龄期和不同强度条件下高径比为1∶1的■18圆柱体试件与标准试件抗压强度的关系.结果表明:灌浆料试件的形状对其抗压强度的影响比较明显,而尺寸的影响不显著;灌浆料试件的抗压强度随水料比的增加而逐渐降低;不同水料比下■18圆柱体试件抗压强度测试值与标准试件抗压强度测试值均基本服从正态分布.在试验基础上,建立了高径比为1∶1的■18圆柱体试件的抗压强度与标准试件抗压强度的换算公式,可为工程中钢筋套筒连接灌浆料实体强度检测提供理论依据.
In order to investigate the strength and influencing factors of reinforced sleeve joint grouting materials in prefabricated concrete structures,402 grouting material test blocks were designed and prepared to test the compressive strength and observe the shape of specimen,size and water-material ratio for block compressive strength.The relationship of compressive strength between ■18 cylindrical specimen with 1∶1 of height-diameter ratio and standard specimens was established under different ages and strength conditions.The results show that the shape of grouting material test block has obvious influence on the compressive strength,while the size has no significant influence on the compressive strength of grouting material;the strength of the grouting material decreases with the increase of water-material ratio;the compressive strength of ■18 cylindrical specimen and standard specimen basically obeys the normal distribution;on the basis of experiment,the conversion formula of compressive strength of standard specimen and■ 18 cylindrical specimen is established,which can provide a theoretical basis for testing the solid strength of reinforced sleeve joint grouting material in engineering.
In order to investigate the strength and influencing factors of reinforced sleeve joint grouting materials in prefabricated concrete structures,402 grouting material test blocks were designed and prepared to test the compressive strength and observe the shape of specimen,size and water-material ratio for block compressive strength.The relationship of compressive strength between ■18 cylindrical specimen with 1∶1 of height-diameter ratio and standard specimens was established under different ages and strength conditions.The results show that the shape of grouting material test block has obvious influence on the compressive strength,while the size has no significant influence on the compressive strength of grouting material;the strength of the grouting material decreases with the increase of water-material ratio;the compressive strength of ■18 cylindrical specimen and standard specimen basically obeys the normal distribution;on the basis of experiment,the conversion formula of compressive strength of standard specimen and■ 18 cylindrical specimen is established,which can provide a theoretical basis for testing the solid strength of reinforced sleeve joint grouting material in engineering.
引文
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[2] LIU Yunlin,WANG Yanshuai,FANG Guohao,et al.A preliminary study on capsule-based self-healing grouting materials for grouted splice sleeve connection[J].Construction and Building Materials,2018,170:418-423.
[3] 齐宝库,张阳.装配式建筑发展瓶颈与对策研究[J].沈阳建筑大学学报(社会科学版),2015,17(2):156-159.QI Baoku,ZHANG Yang.Prefabricated construction development bottleneck and countermeasures research[J].Journal of Shenyang Jianzhu University(Social Science),2015,17(2):156-159.(in Chinese)
[4] 蒋文龙,李磊,侯静,等.预制装配式建筑设计施工一体化研究[J].施工技术,2017,46(22):72-74.JIANG Wenlong,LI Lei,HOU Jing,et al.Research on the integration of design and construction of precast residence[J].Construction Technology,2017,46(22):72-74.(in Chinese)
[5] 秦珩,钱冠龙.钢筋套筒灌浆连接施工质量控制措施[J].施工技术,2013,42(14):113-117.QIN Yan,QIAN Guanlong.The construction quality control measures of coupler grouting splice for reinforcement[J].Construction Technology,2013,42(14):113-117.(in Chinese)
[6] 李家康.高强混凝土立方抗压强度的尺寸效应[J].建筑材料学报,2004,7(1):81-84.LI Jiakang.Dimensional effect of cubic compressive strength of high-strength concrete[J].Journal of Building Materials,2004,7(1):81-84.(in Chinese)
[7] 苏捷,方志.普通混凝土与高强混凝土抗压强度的尺寸效应[J].建筑材料学报,2013,16(6):1078-1081.SU Jie,FANG Zhi.Scale effect on cubic compressive strength of ordinary concrete and high-strength concrete[J].Journal of Building Materials,2013,16(6):1078-1081.(in Chinese)
[8] 孙彬,毛诗洋,张晋峰,等.钢筋套筒连接用灌浆料抗压强度影响因素试验研究[J].工程质量,2017,35(6):25-28.SUN Bin,MAO Shiyang,ZHANG Jinfeng,et al.Experimental investigation of impacts on compression strength of grout for sleeve splicing of grouting rebars[J].Engineering Quality,2017,35(6):25-28.(in Chinese)
[9] 郑永峰.GDPS灌浆套筒钢筋连接技术研究[D].南京:东南大学,2016.ZHENG Yongfeng.Research on GDPS grouting sleeve reinforcement connection technology[D].Nanjing:Southeast University,2016.(in Chinese)
[10] 吴元,王凯,杨晓婧,等.水泥基灌浆料基本力学性能试验研究[J].建筑结构,2014(19):95-98.WU Yuan,WANG Kai,YANG Xiaojing,et al.Experimental study on basic mechanical properties of cementitious grout[J].Building Structure,2014(19):95-98.(in Chinese)
[11] 苏捷,方志.不同骨料组分混凝土立方体抗压强度尺寸效应试验研究[J].建筑结构学报,2014,35(2):152-157.SU Jie,FANG Zhi.Experimental study on impact of aggregate mixture on dimensional effect of concrete cubic compressive strength[J].Journal of Building Structures,2014,35(2):152-157.(in Chinese)
[12] 周甲佳,潘金龙,梁坚凝,等.尺寸效应对水泥净浆与粗骨料界面黏结性能的影响[J].建筑材料学报,2012,15(5):712-716.ZHOU Jiajia,PAN Jinlong,LIANG Jianning,et al.Influence of size effect on bonding performance between coarse aggregate and cement paste[J].Journal of Building Materials,2012,15(5):712-716.(in Chinese)
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