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THE RESEACH OF COMPLETELY RECYCLABLE CONCRETE

完全可回收混凝土的研究

基本信息

批准号：
07505016
负责人：
TOMOSAWA Fuminori
金额：
$ 7.87万
依托单位：
THE UNIVERSITY OF TOKYO
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07505016/
关键词：
concrete limestone crusher stone limestone crusher sand water content per unit volume of concrete powder volume mechanical property fire resistance efficiency 成分調整単位水量微粉量石灰石砂石微粉乾燥収縮再生骨材破砕方法粒度分布ワ-カビリティー微粒子

项目摘要

We made it clear following from this study.1) We made it clear followings about the property of Limestone Crusher Sand and Stone containing Completely Recyclable Concrete.・In case of increasing Powder volume per unit of concrete, the water content per unit volume of concrete increased a little. And the water content per unit of Limestone Aggregates Concrete became small as the one of Normal Concrete.・In case of increasing Powder volume per unit of concrete in condition of fixed Water volume, Air volume per unit of Concrete became small not as for water cement ratio.・The volume of bleeding on some ranges of water cement ratio increased not as for powder volume of Limestone Crusher Sand.・The setting time of concrete on some ranges of water cement ratio doesn't have effects on powder volume.2) We made it clear followings about the property of Limestone Aggregates Concrete.・The Strength Performance of Limestone Aggregates Concrete is as same as the ones of Normal Concrete in case that water cement ratio is 40%, and became a little big in case that water cement ratio is 50,60%.・The Fire Resistance of Limestone Aggregates Concrete is a little bad as Normal Aggregate Concrete about the down-rate of Compression strength of Concrete, but almost properties of both Concrete areequal.

通过这项研究，我们明确了以下几点：1)我们明确了石灰石破碎机、砂石和含有完全可回收混凝土的石材的性能。·在增加单位混凝土粉量的情况下，单位体积混凝土的含水率略有增加。石灰石骨料混凝土的单位含水率比普通混凝土的单位含水率小。·在水量不变的情况下，增加单位混凝土的粉量，单位混凝土的空气量变小，而不是水灰比。在一定的水灰比范围内，石灰石破碎机砂的出粉量没有增加，但渗出量有所增加。在一定的水灰比范围内，混凝土的凝结时间对粉量没有影响。2)明确了石灰石骨料混凝土的性能。在水灰比为40%时，石灰石集料混凝土的强度性能与普通混凝土相当，当水灰比为50%、60%时，石灰石集料混凝土的强度性能略有增大。石灰石骨料混凝土抗火性能略差于普通骨料混凝土，但抗压强度下降率与普通骨料混凝土基本相当。