基于试验研究的新疆地区C30自密实混凝土的冻融损伤指标分析
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摘要
采取快速冻融的试验方法,以冻融循环次数为变量,对比分析我国新疆地区原材料配制的C30自密实混凝土与普通混凝土经0、50、100、150次冻融循环后抗冻性能和基本力学性能的差异,主要测定的指标包括:质量损失率、相对动弹性模量损失率、含水率、立方体抗压强度、轴心抗压强度及劈裂抗拉强度。试验结果表明:(1)质量损失率和含水率可以很好的判断混凝土的抗冻性,但相对动弹性模量损失率与冻融损伤的关系不明显。(2)冻融损伤对劈裂抗拉强度的影响较为明显,对立方体抗压强度的影响次之,而对轴心抗压强度影响相对较小。(3)自密实混凝土的抗冻性能及其基本力学性能普遍优于普通混凝土。
The rapid freezing and thawing test method,based on the number of freeze-thaw cycles,the differences between the C30 self-compacting concrete and the ordinary concrete after 0,50,100 and 150 freezing-thawing cycle were compared and analyzed,and the main indexes were quality loss rate,relative dynamic elastic modulus loss rate,water content,cubic compressive strength,axial compressive strength and splitting tensile strength.The results show that(1)The quality loss rate and water content can judge the frost resistance of concrete,but the relationship between the relative dynamic modulus of elasticity and the freeze-thaw damage is not obvious.(2)The effect of freeze-thaw damage on splitting tensile strength is more obvious,the effect of cubic compressive strength is the second,but the influence on axial compressive strength is relatively small.(3)The frost resistance and basic mechanical properties of self-compacting concrete are generally better than those of ordinary concrete.
The rapid freezing and thawing test method,based on the number of freeze-thaw cycles,the differences between the C30 self-compacting concrete and the ordinary concrete after 0,50,100 and 150 freezing-thawing cycle were compared and analyzed,and the main indexes were quality loss rate,relative dynamic elastic modulus loss rate,water content,cubic compressive strength,axial compressive strength and splitting tensile strength.The results show that(1)The quality loss rate and water content can judge the frost resistance of concrete,but the relationship between the relative dynamic modulus of elasticity and the freeze-thaw damage is not obvious.(2)The effect of freeze-thaw damage on splitting tensile strength is more obvious,the effect of cubic compressive strength is the second,but the influence on axial compressive strength is relatively small.(3)The frost resistance and basic mechanical properties of self-compacting concrete are generally better than those of ordinary concrete.
引文
[1]自密实混凝土应用技术规程:JGJ/T 283-2012[S].北京:中国计划出版社出版.
[2]侯景鹏,王权,史巍,等.C60自密实混凝土氯离子渗透和抗冻性能研究[J].硅酸盐通报,2017,36(3):1025-1029.
[3]郭傲,赵铁军,陆文攀,等.干硬性混凝土抗冻性能研究[J].硅酸盐通报,2015,34(1):55-59.
[4]LOTFY A,HOSSAIN K M A,LACHERMI M.Durability properties of lightweight self-consolidating concrete developed with three types of aggregates[J].In Construction and Building Materials,2016(106):43-54.
[5]BEATA覵P.The frost resistance versus air voids parameters of high performance self compacting concrete modified by non-air-entrained admixtures[J].In Construction and Building Materials,2013(48):1209-1220.
[6]赵燕茹,范晓奇,高明宝,等.钢纤维自密实混凝土抗冻性能试验研究[J].混凝土,2016(12):126-129,133.
[7]董振平,赵凯月,王艳.高强钢纤维混凝土抗冻性能试验研究[J].混凝土,2017(2):63-65.
[8]刘清,韩风霞,高金东,等.大掺量粉煤灰自密实混凝土抗冻性能的试验研究[J].混凝土,2016(5):38-40,44.
[9]张萌,刘清,韩风霞,等.自密实混凝土冻融循环后基本力学性能试验研究[J].混凝土,2016(12):22-24,28.
[10]刘清,张萌,韩霞,等.粉煤灰和矿粉对自密实混凝土抗冻性能影响的试验研究[J].混凝土,2016(10):84-86,94.
[11]普通混凝土力学性能试验方法标准:GB/T 50081-2002[S].北京:中国建筑工业出版社,2003.
[12]普通混凝土长期性能和耐久性能试验方法标准:GB/T 50082-2009[S].北京:中国建筑工业出版社,2009.
[13]蔡正咏,王足献.正交设计在混凝土中的应用[M].北京:中国建筑工作出版社,1985.
[14]POWERS T C,HELMUTH R A.Theory of volume changes in hardened Portland cement paste during freezing[C].In:Proceedings of Highway Research Board,1953:285-97.
[15]罗昕,卫军.冻融循环后流态混凝土与普通混凝土试验研究[J].四川建筑科学研究,2005(6):155-158.
[2]侯景鹏,王权,史巍,等.C60自密实混凝土氯离子渗透和抗冻性能研究[J].硅酸盐通报,2017,36(3):1025-1029.
[3]郭傲,赵铁军,陆文攀,等.干硬性混凝土抗冻性能研究[J].硅酸盐通报,2015,34(1):55-59.
[4]LOTFY A,HOSSAIN K M A,LACHERMI M.Durability properties of lightweight self-consolidating concrete developed with three types of aggregates[J].In Construction and Building Materials,2016(106):43-54.
[5]BEATA覵P.The frost resistance versus air voids parameters of high performance self compacting concrete modified by non-air-entrained admixtures[J].In Construction and Building Materials,2013(48):1209-1220.
[6]赵燕茹,范晓奇,高明宝,等.钢纤维自密实混凝土抗冻性能试验研究[J].混凝土,2016(12):126-129,133.
[7]董振平,赵凯月,王艳.高强钢纤维混凝土抗冻性能试验研究[J].混凝土,2017(2):63-65.
[8]刘清,韩风霞,高金东,等.大掺量粉煤灰自密实混凝土抗冻性能的试验研究[J].混凝土,2016(5):38-40,44.
[9]张萌,刘清,韩风霞,等.自密实混凝土冻融循环后基本力学性能试验研究[J].混凝土,2016(12):22-24,28.
[10]刘清,张萌,韩霞,等.粉煤灰和矿粉对自密实混凝土抗冻性能影响的试验研究[J].混凝土,2016(10):84-86,94.
[11]普通混凝土力学性能试验方法标准:GB/T 50081-2002[S].北京:中国建筑工业出版社,2003.
[12]普通混凝土长期性能和耐久性能试验方法标准:GB/T 50082-2009[S].北京:中国建筑工业出版社,2009.
[13]蔡正咏,王足献.正交设计在混凝土中的应用[M].北京:中国建筑工作出版社,1985.
[14]POWERS T C,HELMUTH R A.Theory of volume changes in hardened Portland cement paste during freezing[C].In:Proceedings of Highway Research Board,1953:285-97.
[15]罗昕,卫军.冻融循环后流态混凝土与普通混凝土试验研究[J].四川建筑科学研究,2005(6):155-158.