粉煤灰对再生砖砌体骨料混凝土干燥收缩性能的影响

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发布时间：2020-01-06 00:00:00

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粉煤灰对再生砖砌体骨料混凝土干燥收缩性能的影响

Influence of Fly Ash on the Drying Shrinkage Performance of Recycled Brick Masonry Aggregate Concrete

2018年第5期

粉煤灰；再生混凝土；干燥收缩；氮吸附

Fly ash; Recycled concrete; Drying shrinkage; Nitrogen adsorption

2018年第5期

1000-4637（2018）05-96-05

国家自然科学基金项目（51408622）；北京市自然科学青年科学基金项目（8144043）。

李显1,2，李飞2，陆加越1，王福晋2，周理安2

1.江苏苏博特新材料股份有限公司，高性能土木工程材料国家重点实验室，南京 211103； 2.北京节能减排关键技术协同创新中心，北京建筑大学，100044

李显1,2，李飞2，陆加越1，王福晋2，周理安2

李显,李飞,陆加越,等.粉煤灰对再生砖砌体骨料混凝土干燥收缩性能的影响[J].混凝土与水泥制品,2018(5):96-100.

LI X,LI F,LU J Y,et al.Influence of Fly Ash on the Drying Shrinkage Performance of Recyled Brick Masonry Aggregate Concrete[J].China Concrete and Cement Products,2018(5):96-100.

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摘 Abstract:Recycledbrickmasonryaggregateconcrete(RBMAC)ofrecycledbrickmasonryhastheproblemoflargeshrinkageandshrinkagedeformation.Takingthesubstitutionrateofflyash(0,25%,50%)andthevolumereplacementrateofrecycledbrickmasonryaggregate(0,50%,100%)asvariables,theinfluenceofflyashontheshrinkageperformanceofRBMACisstudied,andtheruleispredicted.TheresultsshowthattheadditionofflyashisakindofRBMACtechniquethatcaneffectivelysolvetheshrinkage,mixedwith50%flyashcanmakethedryingshrinkageofRBMACdecreasedbyabout40%,evenlessthanthe8%ofthenaturalaggregateconcretewithoutflyash.Thenitrogenadsorptiontestfurthershowedthatcaneffectivelyrefinetheinnerholestructureofthespecimenandreducetheproportionofthepores,thusinhibitthedryingshrinkageofRBMAC.CombinedwiththeshrinkagemechanismofhighvolumeflyashRBMAC,themodifiedpredictionformulaofthedryingshrinkageoftheRBMACconcretewithflyashisobtained.要：再生砖砌体骨料混凝土（recycledbrickmasonryaggregateconcrete,RBMAC）存在干燥收缩变形大的问题。本文以粉煤灰质量取代率（0、25%、50%）和再生砖砌体骨料体积取代率（0、50%、100%）为变量，研究粉煤灰对RBMAC收缩性能的影响并预测其规律。结果表明，粉煤灰的掺加是一种可以有效解决RBMAC收缩较大问题的技术途径，掺加50%粉煤灰可使RBMAC干燥收缩降低约40%，甚至比未掺加粉煤灰的天然骨料混凝土相比还减小约8%；氮吸附试验进一步说明，粉煤灰的掺加有效细化了试样的内部孔结构，减小了毛细孔的比例，从而一定程度上抑制了RBMAC的干燥收缩；结合大掺量粉煤灰RBMAC的收缩机理，得出了考虑粉煤灰掺量的RBMAC干燥收缩修正预测公式。

英文名 : Influence of Fly Ash on the Drying Shrinkage Performance of Recycled Brick Masonry Aggregate Concrete

刊期 : 2018年第5期

关键词 : 粉煤灰；再生混凝土；干燥收缩；氮吸附

Key words : Fly ash; Recycled concrete; Drying shrinkage; Nitrogen adsorption

刊期 : 2018年第5期

DOI :

文章编号 : 1000-4637（2018）05-96-05

基金项目 : 国家自然科学基金项目（51408622）；北京市自然科学青年科学基金项目（8144043）。

作者 : 李显1,2，李飞2，陆加越1，王福晋2，周理安2

单位 : 1.江苏苏博特新材料股份有限公司，高性能土木工程材料国家重点实验室，南京 211103； 2.北京节能减排关键技术协同创新中心，北京建筑大学，100044

李显1,2，李飞2，陆加越1，王福晋2，周理安2

李显,李飞,陆加越,等.粉煤灰对再生砖砌体骨料混凝土干燥收缩性能的影响[J].混凝土与水泥制品,2018(5):96-100.

LI X,LI F,LU J Y,et al.Influence of Fly Ash on the Drying Shrinkage Performance of Recyled Brick Masonry Aggregate Concrete[J].China Concrete and Cement Products,2018(5):96-100.

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摘要

参数

结论

参考文献

引用本文

摘 Abstract: Recycled brick masonry aggregate concrete (RBMAC) of recycled brick masonry has the problem of large shrinkage and shrinkage deformation. Taking the substitution rate of fly ash (0,25%,50%) and the volume replacement rate of recycled brick masonry aggregate(0,50%,100%) as variables, the influence of fly ash on the shrinkage performance of RBMAC is studied, and the rule is predicted. The results show that the addition of fly ash is a kind of RBMAC technique that can effectively solve the shrinkage, mixed with 50% fly ash can make the drying shrinkage of RBMAC decreased by about 40%, even less than the 8% of the natural aggregate concrete without fly ash. The nitrogen adsorption test further showed that can effectively refine the inner hole structure of the specimen and reduce the proportion of the pores, thus inhibit the drying shrinkage of RBMAC. Combined with the shrinkage mechanism of high volume fly ash RBMAC, the modified prediction formula of the drying shrinkage of the RBMAC concrete with fly ash is obtained.要：再生砖砌体骨料混凝土（recycled brick masonry aggregate concrete, RBMAC）存在干燥收缩变形大的问题。本文以粉煤灰质量取代率（0、25%、50%）和再生砖砌体骨料体积取代率（0、50%、100%）为变量，研究粉煤灰对RBMAC收缩性能的影响并预测其规律。结果表明，粉煤灰的掺加是一种可以有效解决RBMAC收缩较大问题的技术途径，掺加50%粉煤灰可使RBMAC干燥收缩降低约40%，甚至比未掺加粉煤灰的天然骨料混凝土相比还减小约8%；氮吸附试验进一步说明，粉煤灰的掺加有效细化了试样的内部孔结构，减小了毛细孔的比例，从而一定程度上抑制了RBMAC的干燥收缩；结合大掺量粉煤灰RBMAC的收缩机理，得出了考虑粉煤灰掺量的RBMAC干燥收缩修正预测公式。

关键词:

粉煤灰；再生混凝土；干燥收缩；氮吸附

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[1] 肖建庄,郑世同,王静.再生混凝土长龄期强度与收缩徐变性能[J].建筑科学与工程学报,2015(1):21-26.

[2] DOMINGO-CABO,A LAZARO,C LOPEZ-GAYARRE,et al. Creep and shrinkage of recycled aggregate concrete[J].Construc tion & Building Materials,2009,23(7):2545-2553.

[3] 崔正龙,庄宇,汪振双.再生骨料钢筋混凝土剪力墙干燥收缩性能[J].建筑材料学报,2011(2):275-277.

[4] Yuanchen Guo,Xue Wang,Jueshi Qian.Physical model of drying shrinkage of recycled aggregate concrete[J]. Journal of Wuhan University of Technology: materials Science Edition,2015,30(6):1260-1267.

[5] 安明喆,朱金铨,覃维祖,等.粉煤灰对高性能混凝土早期收缩的抑制及其机理研究[J].中国铁道科学,2006(4):27-31.

[6] 刘志勇.不同温湿度环境粉煤灰混凝土与基准混凝土收缩性能试验研究[J].土木工程学报,2009(5):69-73.

[7] Liu B J, Xie Y J. Study on Strength, Shrinkage and Creep of Concrete Containing Ultrafine Fly Ash Composites[J]. Advanced Materials Research,2012,450-451:162-167.

[8] 陈波,张亚梅,郭丽萍.大掺量粉煤灰混凝土干燥收缩性能[J].东南大学学报:自然科学版,2007(2):334-338.

[9] Gao Peiwei,Lu Xiaolin,Tang Mingshu.Shrinkage and expansive strain of concrete with fly ash and expansive agent[J].Journal of Wuhan University of Technology-Mater Sci Ed,2009(1):150-153.

[10] 黄国兴,惠荣炎,王秀军.混凝土徐变与收缩[M].北京:中国电力出版社,2012.

[11] Gholamreza Fathifazl,A. Ghani Razaqpur,O. Burkan Isgor. Creep and drying shrinkage characteristics of concrete produced with coarse recycled concrete aggregate. Cement and Concrete Composites,2011,33:1026-1037.

[12] 田倩.低水胶比大掺量矿物掺合料水泥基材料的收缩及机理研究[D].南京:东南大学,2006.

[13] 惠荣炎,黄国兴.粉煤灰混凝土依时性变形的试验研究[J]. 水利水电技术,1992(8):56-61.

[14] Nuruddin M F,Memon F A,Shafiq N,et al.Drying Shrinkage of Fly Ash-Based Self-Compacting Geopolymer Concrete[J]. Applied Mechanics & Materials, 2014,567:362-368.

[15] Gregg S J S. Adsorption, Surface Area and Porosity,Vol.2[M].Adsorption, surface area and porosity. Academic Pr.,1982:220-221.

[16] Wang Y,Ni F,Xuan W.Research on Dry-Shrinkage Perfor mance of Cement-Treated Base Materials[C]. Material Design, Construction, Maintenance, and Testing of Pavements@sSelected Papers from the 2009 GeoHunan International Conference. ASCE,2014:81-86.

[17] 肖建庄,许向东,范玉辉.再生混凝土收缩徐变试验及徐变神经网络预测[J].建筑材料学报,2013(5):752-757.

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粉煤灰对再生砖砌体骨料混凝土干燥收缩性能的影响

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