碱激发矿渣混凝土空心砌块砌体抗压强度试验
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摘要
为考察碱激发矿渣陶粒混凝土空心砌块(alkali-activated slag ceramsite concrete hollow block,简称AASCHB)砌体的轴心受压性能,完成了由强度等级为MU7.5、MU10、MU15的AASCHB和强度等级为Mb20、Mb25、Mb30的碱激发矿渣陶砂砂浆(alkali-activated slag mortar with pottery sand,简称AASM)砌筑的36个砌块砌体试件的轴心受压试验.试验结果表明:AASCHB砌体的抗压强度随AASCHB抗压强度的增大而增大;而AASM抗压强度对砌体抗压强度的影响相对复杂.用AASCHB和AASM砌筑的砌块砌体轴心抗压强度试验值普遍低于按GB 50003—2011《砌体结构设计规范》砌体轴心抗压强度计算公式的预估值.在《砌体结构设计规范》砌体轴心抗压强度计算公式的基础上,通过引入AASM特性系数,调整砂浆强度影响修正系数,建立了以AASCHB抗压强度和AASM抗压强度为关键参数的这类新型砌块砌体的轴心抗压强度计算公式.
To investigate the axial compressive performance of alkali-activated slag ceramsite concrete hollow block(AASCHB) masonry, a total of 36 masonry specimens of the AASCHB at MU7.5, MU10, and MU15 as well as alkali-activated slag mortar with pottery sand(AASM) at Mb20, Mb25, and Mb30 were tested. Results show that the axial compressive strength of the AASCHB masonry increased with that of AASCHB, while the axial compressive strength of the AASM had a complicated impact on that of the masonry.Based on the formula provided in Code for Design of Masonry Structures(GB 50003—2011), the estimated values of the axial compressive strength of the masonry using AASCHB and AASM are generally higher than the experimental results.By introducing the characteristic coefficient of AASM and adjusting the correction coefficient of the axial compressive strength for mortar, a formula for the axial compressive strength of the new type of block masonry with the key parameters of the compressive strength of AASCHB and AASM was proposed, which is in accordance with the codified formula of the masonry axial compressive strength adopted in Code for Design of Masonry Structures.
To investigate the axial compressive performance of alkali-activated slag ceramsite concrete hollow block(AASCHB) masonry, a total of 36 masonry specimens of the AASCHB at MU7.5, MU10, and MU15 as well as alkali-activated slag mortar with pottery sand(AASM) at Mb20, Mb25, and Mb30 were tested. Results show that the axial compressive strength of the AASCHB masonry increased with that of AASCHB, while the axial compressive strength of the AASM had a complicated impact on that of the masonry.Based on the formula provided in Code for Design of Masonry Structures(GB 50003—2011), the estimated values of the axial compressive strength of the masonry using AASCHB and AASM are generally higher than the experimental results.By introducing the characteristic coefficient of AASM and adjusting the correction coefficient of the axial compressive strength for mortar, a formula for the axial compressive strength of the new type of block masonry with the key parameters of the compressive strength of AASCHB and AASM was proposed, which is in accordance with the codified formula of the masonry axial compressive strength adopted in Code for Design of Masonry Structures.
引文
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[15]王维才,饶福才,唐和俊,等.碱矿渣混凝土干燥收缩性能与预测模型研究[J].建筑技术,2013,44(2):161WANG Weicai,RAO Fucai,TANG Hejun,et al.Drying shrinkage and prediction model of alkali-slag concrete[J].Architecture Technology,2013,44(2):161
[2] 吴元锋,仪桂云,刘全润,等.粉煤灰综合利用现状[J].洁净煤技术,2013,19(6):100WU Yuanfeng,YI Guiyun,LIU Quanrun,et al.Current situation of comprehensive utilization of fly ash[J].Clean Coal Technology,2013,19(6):100
[3] PROVIS J L,BERNAL S A.Geopolymers and related alkali-activated materials[J].Annual Review of Materials Research,2014,44(44):300
[4] 祝贺.碱矿渣基地质聚合物的制备及其高温性能研究[D].南宁:广西大学,2016:45ZHU He.The preparation and high temperature performance research of alkali slag base geopolymer materials[D].Nanning:Guangxi University,2016:45
[5] 郑文忠,陈伟宏,王英.碱矿渣胶凝材料的耐高温性能[J].华中科技大学学报(自然科学版),2009,37(10):98ZHENG Wenzhong,CHEN Weihong,WANG Ying.High-temperature resistance performance of alkali-activated slag cementitious materials[J].Journal of Huazhong University of Science and Technology(Natural Science Edition),2009,37(10):98
[6] 砌体结构设计规范:GB 50003—2011[S].北京:中国建筑工业出版社,2011
[7] 孔德玉,张俊芝,倪彤元,等.碱激发胶凝材料及混凝土研究进展[J].硅酸盐学报,2009,37(1):151KONG Deyu,ZHANG Junzhi,NI Tongyuan,et al.Research progress on alkali-activated binders and concrete[J].Journal of the Chinese Ceramic Society,2009,37(1):151
[8] 混凝土砌块和砖试验方法:GB/T 4111—2013[S].北京:中国标准出版社,2013
[9] 建筑砂浆基本性能试验方法标准:JGJ/T 70—2009[S].北京:中国建筑工业出版社,2009
[10]黄靓,陈行之.应规范建筑砂浆强度试块的底模材料[J].建筑砌块与砌块建筑,2011(3):19HUANG Liang,CHEN Xingzhi.The bottom mould material of building mortar strength test block should be standardized[J].Building Block & Block Building,2011(3):19
[11]砌体基本力学性能试验方法标准:GB/T 50129—2011[S].北京:中国建筑工业出版社,2011
[12]AYDIN S,BARADAN B.Effect of activator type and content on properties of alkali-activated slag mortars[J].Composites Part B Engineering,2014,57(3):168
[13]陈科,杨长辉,潘群,等.碱-矿渣水泥砂浆的干缩特性[J].重庆大学学报,2012,35(5):64CHEN Ke,YANG Changhui,PAN Qun,et al.Drying shrinkage characteristics of alkali-slag cement mortar[J].Journal of Chongqing University,2012,35(5):64
[14]顾亚敏,方永浩.碱矿渣水泥的收缩与开裂特性及其减缩与增韧[J].硅酸盐学报,2012(1):76GU Yamin,FANG Yonghao.Shrinkage,cracking,shrinkage-reducing and toughening of alkali-activated slag cement-a short review [J].Journal of the Chinese Ceramic Society,2012 (1):76
[15]王维才,饶福才,唐和俊,等.碱矿渣混凝土干燥收缩性能与预测模型研究[J].建筑技术,2013,44(2):161WANG Weicai,RAO Fucai,TANG Hejun,et al.Drying shrinkage and prediction model of alkali-slag concrete[J].Architecture Technology,2013,44(2):161