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首页> 外文会议>12th international inorganic-bonded fiber composites conference >PITCHSTONE FINES: A NEW INORGANIC BINDER FOR PORTLAND CEMENT-BASED CONSTRUCTION PRODUCTS
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PITCHSTONE FINES: A NEW INORGANIC BINDER FOR PORTLAND CEMENT-BASED CONSTRUCTION PRODUCTS

机译：沥青细粉：一种用于波特兰水泥基建筑产品的新型无机粘合剂

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摘要

The findings of this investigation into the performance pitchstone fines (PF) sourced from a naturallyrnoccurring pitchstone deposit in Queensland Australia as a potential pozzolanic supplementary cementitiousrnmaterial (SCM) are reported. 50 mm mortar cubes were prepared by replacement of 20% of the Portlandrncement (PC) with PF and PF blended with silica fume (SF) in a 1:1 ratio. Mortar cubes were also preparedrnwith a 20% PC substitution level using fly ash (FA) and FA blended with SF also in a 1:1 ratio forrncomparison as the SCM. Control mortar cubes without PC substitution were also prepared. The compressivernstrength results for PF blended mortars were comparable to FA mortars, were within 75% of the controlrnmortar at 7 and 28 days and approached the strength of the control mortar at 91 days curing. PF and FArnblends containing SF produced compressive strength which surpassed the control mortar. Drying shrinkagernmeasurements are also reported for up to 28 days storage in air. The PF mortar was found to haverncomparable shrinkage to the control mortar; the shrinkage of the FA mortar was found to be significantlyrngreater. The differences were attributed to the particle shape, angularity and size resulting in greater capillaryrnforces in the FA mortars resulting in greater shrinkage.
机译：据报道，这项调查结果来自澳大利亚昆士兰州自然形成的沥青石矿床，作为潜在的火山灰补充胶凝材料（SCM）来源的性能沥青石粉（PF）。通过用PF代替20％的Portlandrncement（PC）和以1：1比例掺混有硅粉（SF）的PF来制备50 mm砂浆立方体。还使用粉煤灰（FA）制备了具有20％PC取代水平的砂浆立方体，FA也以1：1的比例与SF混合，作为SCM。还制备了没有PC替代的对照砂浆立方体。 PF混合砂浆的抗压强度结果与FA砂浆相当，在第7天和第28天时为控制砂浆的75％以内，并在第91天固化时达到了对照砂浆的强度。含有SF的PF和FArnblends产生的抗压强度超过了控制砂浆。据报道，在空气中最多可储存28天的干燥收缩率。发现PF砂浆的收缩率与对照砂浆无可比拟。发现FA砂浆的收缩显着增加。差异归因于颗粒形状，角度和尺寸，从而导致FA砂浆中更大的毛细作用力，从而导致更大的收缩率。

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  • 来源
  • 会议地点 Aalborg(DK);Aalborg(DK)
  • 作者

    K. VESSALAS; A. RAY; P. THOMAS; P. JOYCE; J. HAGGMAN;

  • 作者单位

    Centre for Built Infrastructure Research, University of Technology, Sydney, PO Box 123, Broadway NSW 2007, Australia;

    Centre for Built Infrastructure Research, University of Technology, Sydney, PO Box 123, Broadway NSW 2007, Australia;

    Centre for Built Infrastructure Research, University of Technology, Sydney, PO Box 123, Broadway NSW 2007, Australia Dept. Chemistry and Forensic Sciences, University of Technology Sydney PO Box 123, Broadway NSW 2007, Australia Email: paul.thomas@uts.edu.au;

    Perlco Pty Ltd, Suite 701, Level 7, 121 Walker Street, North Sydney NSW 2060, Australia;

    Perlco Pty Ltd, Suite 701, Level 7, 121 Walker Street, North Sydney NSW 2060, Australia;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 复合材料;
  • 关键词

    pitchstone fines; fly ash; portland cement; strength activity index; drying shrinkage;

    机译：沥青粉;粉煤灰;硅酸盐水泥;强度强度指标;干缩;

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