机制砂中石灰石粉对聚羧酸应用效果的影响
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摘要
为了探讨石灰石粉对聚羧酸应用效果的影响,研究了不同石灰石粉含量条件下掺加聚羧酸制备的浆体扩展度和混凝土坍落度的变化规律。结果表明,随着石灰石粉含量的增加,对聚羧酸应用效果的影响逐渐增大;石灰石粉与水泥对聚羧酸存在竞争吸附,且石灰石粉的比表面积大、需水量高,导致聚羧酸减水效果降低;石灰石粉的混入会降低浆体中碱的浓度,使得保坍型聚羧酸的水解速度变慢,导致聚羧酸的保坍效果降低。
引文
[1]郭育霞,贡金鑫,李晶.石粉掺量对混凝土力学性能及耐久性的影响[J].建筑材料学报,2009,12(3):266-271.
[2]Tsivilis S,Batis G.Properties and behavior of limestone cement and mortar[J].Cement and Concrete Research,2000,30(10):1679-1683.
[3]王稷良,周明凯,贺图升,柯国炬,崔巩.石粉对机制砂混凝土抗渗透性和抗冻融性能的影响[J].硅酸盐学报,2008,36(4):482-486.
[4]Wen Junqiang.Properties and mechanism of ground limestone as concrete mineral additive[D].Beijing:Chia Building Materials Academy,2010.
[5]Bonavetti V,Donza H,Menendez G,et al.Limestone filler cement in lo W/C concrete:A rational use of energy[J].Cement and Concrete Research,2003,33(6):865.
[6]刘数华,阎培渝.石灰石粉对水泥浆体填充效应和砂浆孔结构的影响[J].硅酸盐学报,2008,36(1):69.
[7]Menendez G,Bonavetti V L,Irassar E F.Strength development of ternary blended cement with limestone filler and blastfurnace slag[J].Cement and Concrete Composites,2003,25(1):61-67.
[8]王建华,肖佳,赵金辉.石灰石粉对水泥与高效减水剂相容性的影响[J].水泥工程,2009(1):18.
[9]杨柳,宋少民.石灰石粉与矿物掺合料复掺对混凝土工作性及强度的影响[J].北京建筑工程学院学报,2010,26(2):52.
[10]Mikanovic.N,Jolicoeur C.Influence of superplasticizers on the rheology and stability of limestone and cement pastes[J].Cement and Concrete Research,2008,38(7):907.
[2]Tsivilis S,Batis G.Properties and behavior of limestone cement and mortar[J].Cement and Concrete Research,2000,30(10):1679-1683.
[3]王稷良,周明凯,贺图升,柯国炬,崔巩.石粉对机制砂混凝土抗渗透性和抗冻融性能的影响[J].硅酸盐学报,2008,36(4):482-486.
[4]Wen Junqiang.Properties and mechanism of ground limestone as concrete mineral additive[D].Beijing:Chia Building Materials Academy,2010.
[5]Bonavetti V,Donza H,Menendez G,et al.Limestone filler cement in lo W/C concrete:A rational use of energy[J].Cement and Concrete Research,2003,33(6):865.
[6]刘数华,阎培渝.石灰石粉对水泥浆体填充效应和砂浆孔结构的影响[J].硅酸盐学报,2008,36(1):69.
[7]Menendez G,Bonavetti V L,Irassar E F.Strength development of ternary blended cement with limestone filler and blastfurnace slag[J].Cement and Concrete Composites,2003,25(1):61-67.
[8]王建华,肖佳,赵金辉.石灰石粉对水泥与高效减水剂相容性的影响[J].水泥工程,2009(1):18.
[9]杨柳,宋少民.石灰石粉与矿物掺合料复掺对混凝土工作性及强度的影响[J].北京建筑工程学院学报,2010,26(2):52.
[10]Mikanovic.N,Jolicoeur C.Influence of superplasticizers on the rheology and stability of limestone and cement pastes[J].Cement and Concrete Research,2008,38(7):907.