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研究了由强度为30～100 MPa混凝土制造的再生骨料对高性能混凝土力学性能的影响。结果表明:利用30 MPa和45 MPa低强度混凝土制造的再生骨料搅拌的高性能混凝土,其力学性能明显下降;而由80MPa和100MPa的高强度混凝土制造的再生骨料搅拌的高性能混凝土,其28d抗压强度略高于由天然骨料搅拌的高性能混凝土的;再生骨料降低高性能混凝土的弹性模量,但降低量随着制造再生骨料混凝土的强度的增加而减少;28 d后再生骨料高性能混凝土的劈裂强度高于天然骨料高性能混凝土;由80 MPa和100 MPa高强度混凝土制造的再生骨料可以搅拌高性能混凝土。
Abstract：This paper presents the experimental results of a study on the effect of quality of parent concrete(PC) on the properties of recycled aggregates(RA) that are derived from them,and on the mechanical properties of high performance recycled aggregate con-crete(HPC) when the RAs are used to prepare new concretes.The PC with strength grades ranged from 30 to 100 MPa were crushed to the sizes of that of coarse aggregates(<20 mm),and then they were used to replace natural aggregates(crushed granite) at percent-ages of 0 and 100%,for producing new HPC mixes.The results indicated that the compressive strength of the HPC prepared with RA derived from 30 and 45 MPa PC was lower than that of the designed concrete strength.However,the strength of the HPC prepared with RA derived from 80 and 100 MPa PCs was similar to or slight higher than that of the corresponding natural aggregate concrete.Moreover,for the new concrete prepared with RAs derived from all PC grades,the splitting tensile strength were higher than the con-trol concrete.The results demonstrated that as far as mechanically properties are concerned,PC with higher strength(80 and 100 MPa) can be used to replace 100% natural aggregates for the production of high performance concrete.
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基本信息:
DOI：10.14062/j.issn.0454-5648.2012.01.010
中图分类号:TU528
引用信息:
[1]寇世聪,潘智生.不同强度混凝土制造的再生骨料对高性能混凝土力学性能的影响(英文)[J].硅酸盐学报,2012,40(01):7-11.DOI:10.14062/j.issn.0454-5648.2012.01.010.
基金信息:
新宏基资助项目
2011-12-29
2011-12-29
2011-12-29