特细砂配制低强度混凝土的试验研究
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Study on preparation of super-fine sand of low strength concrete
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    摘要:

    针对邯郸地区丰富的特细砂资源,采用不同水胶比(0.8、0.7、0.6、0.5)来进行对比试验,研究特细砂砂率对低强度混凝土和易性及抗压强度的影响。通过大量试验结果表明:特细砂砂率对混凝土和易性影响显著,尤其对于水胶比较低的混凝土影响程度更大;水胶比不变,混凝土28 d的抗压强度随着砂率的增加而上升;当增加到某范围值时,混凝土28 d抗压强度则随着砂率的增加而略有下降;选择合理的砂率,特细砂可以配制出符合工作性能和强度要求的混凝土。

    Abstract:

    In view of the rich resources of fine sand in Handan area,the contrast test were carried out by using different water-binder ratio( 0.8,0.7,0.6,0.7) and the influence of fine sand ratio on low strength concrete workability and compressive strength of influence were studied.A lot of experimental results showed that the fine sand influenced on concrete workability,especially relatively low water-binder concrete influence was greater; Water-binder ratio remains unchanged,28 d compressive strength of concrete increased with the of sand ratio; When the sand ratio increased to a certain range of values,28 d compressive strength of concrete decreased with the increase of sand ratio; Fine sand conforming to the requirements concrete of the workability and strength can be formulated through Choosing the reasonable sand rate.

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张翠,何锦云,吕如春.特细砂配制低强度混凝土的试验研究[J].河北工程大学自然版,2014,31(1):6-8

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  • 收稿日期:2013-10-21
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  • 在线发布日期: 2015-01-12
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