浆集比对机制砂轻骨料混凝土性能的影响
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摘要
基于骨料最紧密堆积,采用不同的浆集比来配制机制砂轻骨料混凝土,研究了浆集比对其工作性能、抗压强度及抗氯离子渗透性能的影响。结果表明,浆集比越大,机制砂轻骨料混凝土的工作性和抗压强度越大。但骨料吸附浆体量会趋于稳定,填充浆体量是影响工作性的主要因素,骨料间的基体强度是影响抗压强度的主要因素。机制砂轻骨料混凝土抗氯离子渗透能力极弱,掺入硅灰可以不影响其强度而大幅提升其抗氯离子渗透能力。
The manufactured sand lightweight aggregate was prepared with different paste/aggregate ratio based on the particle dense packing theories.The influence of paste/aggregate ratio on the workability,compressive strength and resistance to chloride penetration of the concrete were studied.Results show that both the workability and compressive strength increase with the increasing of paste/aggregate ratio.The adsorbed paste layer tends to be stable,the amount of filling paste is the main factor affecting the workability,while the strength of the matrix between the aggregate is the main factor affecting the compressive strength.The manufactured sand lightweight aggregate was weak in resistance to chloride penetration,but silica fume can enhance its ability to resist chloride penetration without affecting its strength.
The manufactured sand lightweight aggregate was prepared with different paste/aggregate ratio based on the particle dense packing theories.The influence of paste/aggregate ratio on the workability,compressive strength and resistance to chloride penetration of the concrete were studied.Results show that both the workability and compressive strength increase with the increasing of paste/aggregate ratio.The adsorbed paste layer tends to be stable,the amount of filling paste is the main factor affecting the workability,while the strength of the matrix between the aggregate is the main factor affecting the compressive strength.The manufactured sand lightweight aggregate was weak in resistance to chloride penetration,but silica fume can enhance its ability to resist chloride penetration without affecting its strength.
引文
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[13]李玉龙,孟凡杰.基于骨料最紧密堆积的混凝土配合比设计[J].国防交通工程与技术,2015,13(6):17-21.
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[15]张海伦.高强页岩陶粒轻骨料混凝土拌合物性能及体积变形[D].长沙:长沙理工大学,2015.
[16]张姣龙,马一祎,陆梦婕,等.基于紧密堆积理论的混凝土配合比设计方法研究[J].混凝土与水泥制品,2010(6):15-17,21.
[17]杨建军,李俊毅,雷周,等.混凝土电通量的影响因素分析[J].中国港湾建设,2012(4):57-61.
[18]吴芳,谭盐宾,杨长辉,等.高强轻集料混凝土抗氯离子渗透性能试验研究[J].重庆建筑大学学报,2007(6):117-120.
[19]程伟.高强复合陶粒的制备及轻骨料混凝土氯离子渗透性能的研究[D].大连:大连理工大学,2013.
[2]刘义峰.机制砂水泥砂浆流变性能研究[D].重庆:重庆交通大学,2014.
[3]高旭,翁维素,孙婧.轻骨料混凝土的发展现状与展望[J].河北建筑工程学院学报,2016,34(2):22-24.
[4]Pui-Lam,Albert,Kwok-Hung,et al.Packing and film thickness theories for the mix design of high-performance concrete[J].浙江大学学报(英文版)(a辑:应用物理和工程),2016,17(10):759-781.
[5]赵洪,杨永民,李方贤,等.骨料包裹层厚度的研究及其对多孔混凝土性能的影响[J].混凝土,2014(2):29-32.
[6]赵晶,胡立国,张长福.透水混凝土配合比设计试验研究[J].大连交通大学学报,2014,35(1):57-59.
[7]谢华兵.机制砂粒形与级配特性及其对混凝土性能的影响[D].广州:华南理工大学,2016.
[8]LI J,CHEN Y,WAN C,et al.A mix-design method for lightweight aggregate self-compacting concrete based on packing and mortar film thickness theories[J].Construction&Building Materials,2017(157):621-634.
[9]徐俊娟.自密实混凝土配合比及力学性能研究[D].郑州:郑州大学,2015.
[10]LE H T,M譈LLER M,SIEWERT K,et al.The mix design for selfcompacting high performance concrete containing various mineral admixtures[J].Materials&Design,2015,72(26):51-62.
[11]肖瑞敏,张小伟,杨凯.砂浆填充法在陶粒混凝土配合比设计中的应用研究[J].混凝土,2010(11):113-116.
[12]余春辉,郑星伟,张琴飞,等.基于骨料最紧密堆积的低收缩混凝土配制[J].施工技术,2016,45(S1):539-542.
[13]李玉龙,孟凡杰.基于骨料最紧密堆积的混凝土配合比设计[J].国防交通工程与技术,2015,13(6):17-21.
[14]轻骨料混凝土技术规程:JGJ 51-2002[S].
[15]张海伦.高强页岩陶粒轻骨料混凝土拌合物性能及体积变形[D].长沙:长沙理工大学,2015.
[16]张姣龙,马一祎,陆梦婕,等.基于紧密堆积理论的混凝土配合比设计方法研究[J].混凝土与水泥制品,2010(6):15-17,21.
[17]杨建军,李俊毅,雷周,等.混凝土电通量的影响因素分析[J].中国港湾建设,2012(4):57-61.
[18]吴芳,谭盐宾,杨长辉,等.高强轻集料混凝土抗氯离子渗透性能试验研究[J].重庆建筑大学学报,2007(6):117-120.
[19]程伟.高强复合陶粒的制备及轻骨料混凝土氯离子渗透性能的研究[D].大连:大连理工大学,2013.