废旧瓷砖骨料再生混凝土抗冻融循环性能及可靠性分析
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摘要
为了研究废旧瓷砖颗粒的不同取代率对再生混凝土抗冻融循环能力的影响,设计了废旧瓷砖颗粒取代率为0,20%,40%,60%,80%,100%的6组配合比,采用快冻法对6组再生混凝土进行了冻融循环试验,分别检测混凝土质量损失率和相对动弹模量。以质量损失率、相对动弹性模量为衡量指标,评判出最优配比,采用Wiener分布概率方法建立可靠度函数以此来反映最优配比试件的剩余寿命。结果表明,在冻融循环过程中,各试件的动弹性模量呈现下降的趋势;质量损失率呈现先增加后减少的趋势。当废旧瓷砖颗粒的替代率为20%时,废旧瓷砖再生混凝土抗冻融循环能力最强,试件最快在经受398次冻融循环后才会失效;随着替代率的增加,再生混凝土的抗冻融循环能力大幅度下降。
In order to study the effect of different substitution rates of waste ceramic tile particles on the freeze-thaw cycle resistance of recycled concrete, waste ceramic tile particles with six mix ratios of 0, 20%, 40%, 60%, 80% and 100% were designed. The freeze-thaw cycles of six groups of recycled concrete were tested by quick freezing method, and the loss rate and phase of concrete quality were detected respectively. Taking the mass loss rate and the relative dynamic elastic modulus as the indexes, the optimum proportion was judged, and the reliability function was established by Wiener distribution probability method to reflect the remaining life of the optimum proportion specimens. The results show that the dynamic elastic modulus decreased during freeze-thaw cycles and the mass loss rate increased first and then decreased. When the replacement rate of waste ceramic tile particles was 20%, the recycled concrete of waste ceramic tile had the strongest freeze-thaw cycle resistance, and the fastest test specimen failed after 398 freeze-thaw cycles. With the increase of replacement rate, the freeze-thaw cycle resistance of recycled concrete decreased greatly.
In order to study the effect of different substitution rates of waste ceramic tile particles on the freeze-thaw cycle resistance of recycled concrete, waste ceramic tile particles with six mix ratios of 0, 20%, 40%, 60%, 80% and 100% were designed. The freeze-thaw cycles of six groups of recycled concrete were tested by quick freezing method, and the loss rate and phase of concrete quality were detected respectively. Taking the mass loss rate and the relative dynamic elastic modulus as the indexes, the optimum proportion was judged, and the reliability function was established by Wiener distribution probability method to reflect the remaining life of the optimum proportion specimens. The results show that the dynamic elastic modulus decreased during freeze-thaw cycles and the mass loss rate increased first and then decreased. When the replacement rate of waste ceramic tile particles was 20%, the recycled concrete of waste ceramic tile had the strongest freeze-thaw cycle resistance, and the fastest test specimen failed after 398 freeze-thaw cycles. With the increase of replacement rate, the freeze-thaw cycle resistance of recycled concrete decreased greatly.
引文
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[2] Lotfi S,Eggimann M,Wagnerl E.Performance of recycled aggregate concrete based on a new concrete recycling technology[J].Construction and Building Materials,2015(95):243-256.
[3] Wang Jiahua,Wang Gongxun,Huang Dan,et al.Preparation and performance test of recycled aggregate concrete from waste tiles [J].Bulletin of The Chinese Ceramic Society,2014(11):3000-3005(in Chinese).王佳骅,王功勋,黄丹,等.废瓷砖再生骨料混凝土的配制及性能试验研究[J].硅酸盐通报,2014(11):3000-3005.
[4] Meyer C.The greening of the concrete industry[J].Cement & Concrete Composites,2009(31):601-605.
[5] Huang Dan.Mix proportion design and durability of recycled concrete with waste tiles[D].Xiangtan:Hunan University of Science and Technology,2016(in Chinese).黄丹.废瓷砖全组分再生混凝土配合比设计及耐久性研究[D].湘潭:湖南科技大学,2016.
[6] Lei Ting,Kong Deyu,Zheng Jianjun.Effect of admixture-wrapped aggregate technology on performance of recycled aggregate concrete [J].Concrete,2007 (12):38-41(in Chinese).雷霆,孔德玉,郑建军.掺合料裹骨料工艺对再生骨料混凝土性能的影响[J].混凝土,2007(12):38-41.
[7] Otsuki N,Miyazato S,Yodsudjai W.Influence of recycled aggregate on inteffacial transition zone,strength,chloride penetration[J].Journal of Materials in Civii Engineering,2003,15(5):443 -451.
[8] Peng G F,Zhang G F.Relationship between defects of recycled aggregate and mechanical properties of recycled aggregate concrete[J].Key Engineering Materials,2015,629-630:314-320.
[9] Liu Jinlong,Han Jiande,Wang Shuguang,et al.Research progress on durability of concrete under the coupling effect of sulfate erosion and environmental factors [J].Concrete,2014(9):33-40(in Chinese).刘金龙,韩建德,王曙光,等.硫酸盐侵蚀与环境多因素耦合作用下混凝土耐久性研究进展[J].混凝土,2014(9):33-40.
[10] Liu Hui.Dual effects of sulfate corrosion and freeze-thaw cycles on durability of concrete [D].Chengdu:Southwest Jiaotong University,2010(in Chinese).刘辉.硫酸盐侵蚀与冻融循环双重因素对混凝土耐久性的双重影响[D].成都:西南交通大学,2010.
[11] Zhao Gaosheng,He Zhen,Yang Huamei.Durability of concrete subjected to alternating freeze-thaw cycles and carbonation [J].Journal of Wuhan University,2013,46 (5):604-609(in Chinese).赵高升,何真,杨华美.冻融循环和碳化交替作用下的混凝土耐久性[J].武汉大学学报,2013,46(5):604-609.
[12] Mustafa A M,Abdullah M M A B,Noor N M,et al.Strength of concrete based cement using recycle ceramic waste as aggregate[J].Information Engineering Research Institute,2013,22(6):5-8.
[13] Rashid K,Razzaq A,Ahmad M,et al.Experimental and analytical selection of sustainable recycled concrete with ceramic waste aggregate[J].Construction and Building Materials,2017,18(7):154-158.
[14] Jiang Xinpei,Shu Qian,Dong Yunting.Test on impermeability of recycled concrete rich in brick [J].Journal of Lanzhou University of Technology,2017,43(1):143-147(in Chinese).姜新佩,舒倩,董云婷.富含砖粒再生混凝土的抗渗性试验[J].兰州理工大学学报,2017,43(1):143-147.
[15] Dai Weiyuan,Sun Weimin,Miao Hanliang.Experimental study on freeze-thaw resistance of recycled concrete [J].Concrete,2016 (8):69-71,74(in Chinese).戴薇原,孙伟民,缪汉良.再生混凝土的抗冻融性试验研究[J].混凝土,2016(8):69-71,74.
[16] Zheng Xiaoning,Diao Bo,Sun Yang,et al.Study on deterioration mechanism of mechanical properties of concrete under combined erosion and freeze-thaw cycling [J].Journal of Architectural Structures,2010,2 (31):111-116(in Chinese).郑晓宁,刁波,孙洋,等.混合侵蚀与冻融循环作用下混凝土力学性能劣化机理研究[J].建筑结构学报,2010,2(31):111-116.
[17] Jin Zuquan.Durability and life prediction of concrete under harsh environment in Western China [D].Nanjing:Southeast University,2006(in Chinese).金祖权.西部地区严酷环境下混凝土的耐久性与寿命预测[D].南京:东南大学,2006.
[18] Sanhanamm,Cohenm,Olekj.Sulfate attack research-whither now [J].Cement and Concrete Research,2001,31(6):845-851.
[19] Ickrg S,Ammondnj C,Metcaifd.The microscopical characterization of thaumasite [J].Cement and Concrete Composites,2003,25(8):831-837.