西安理工大学学报2016，Vol.32Issue(4)：410-415,6.DOI:10.19322/j.cnki.issn.1006-4710.2016.04.006
粉煤灰对再生混凝土抗压及耐久性能试验研究
Experimental study of the effect of fly ash on compressive performance and durability of the recycled aggregate concrete
摘要
Abstract
This paper investigates the variable admixture of flyash effecting on the properties and durability of recycled concrete,through crush index,compressive strength,permeability,frost resistance and sulfate corrosion resistance tests.The results indicate that the crushing value rea-ches to minimum when the mixed proportion of recycled aggregates is 1∶1∶2 at 20 MPa,25 MPa and 30 MPa.Besides,the 28-day compressive strength of concrete,when the substitution ratio of flyash for cement is 10%,is about 60% higher than that of concrete without flyash.The imper-meability can be significantly improved when the substitution ratio ranges from 10% to 20%.In addition,if 10% of cement is replaced by flyash,after 100 cycles of freezing and thawing,elastic modulus for concrete remains higher than 60% of before.The concrete resistance to sulfate cor-rosion approaches maximum when the substitution ratio is about 1 5%.Also,mass loss rate is not significant after the tests of frost resistance and resistance to sulfate corrosion.Thus,flyash can improve the mechanical properties and durability of the recycled aggregate concrete in certain extent.Moreover,it is of significance in recycling waste concrete.关键词
再生骨料/再生混凝土/粉煤灰/抗压性能/耐久性能Key words
recycled aggregate/recycled aggregate concrete/flyash/compressive perfor-mance/durability分类
建筑与水利引用本文复制引用
张浩博,任慧超,寇佳亮..粉煤灰对再生混凝土抗压及耐久性能试验研究[J].西安理工大学学报,2016,32(4):410-415,6.基金项目
国家自然科学基金资助项目（51408487）；中国住建部科学技术资助项目（2014-K2-037）；中国博士后科学基金第56批面上资助项目（2014M562437）；陕西省自然科学基金资助项目（2014JQ7292）；陕西省教育厅专项科学研究计划资助项目（14JK1516）；陕西省博士后科研资助项目；西安市建设科技研究资助项目（SJW2015-09）；西安理工大学科学研究计划资助项目 （）
