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[1]曹宏,罗丽,孙飞龙,等.白云石砂为骨料高强混凝土的制备[J].武汉工程大学学报,2013,(03):57-61.[doi:103969/jissn16742869201303012]
　CAO Hong,LUO Li,SUN Fei long,et al.Preparation of high strength concrete with dolomite sand as aggregate[J].Journal of Wuhan Institute of Technology,2013,(03):57-61.[doi:103969/jissn16742869201303012]
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白云石砂为骨料高强混凝土的制备(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2013年03期
页码:
57-61
栏目:
资源与土木工程
出版日期:
2013-03-31

文章信息/Info

Title:
Preparation of high strength concrete with dolomite sand as aggregate
文章编号:
16742869(2013)03005705
作者:
曹宏; 罗丽; 孙飞龙; 梁实; 安子博; 薛俊
武汉工程大学材料科学与工程学院，湖北 武汉 430074
Author(s):
CAO Hong;  LUO Li;  SUN Feilong;  LIANG Shi;  AN Zibo;  XUE Jun
School of Materials Science and Engineering,Wuhan Institute of Technology, Wuhan 430074,China
关键词:
混凝土; 配合比; 强度
Keywords:
concrete;  mixture ratio;  strength
分类号:
TU528.31
DOI:
103969/jissn16742869201303012
文献标志码:
A
摘要:
为了降低活性粉末混凝土的制备成本同时获得高强度制品，根据活性粉末混凝土的制备原理，采用价格相对较低的白云石砂、白云石粉取代其原料中价格较高的石英砂、石英粉来制备高强混凝土.利用水泥，硅灰，粉煤灰三元胶凝材料体系，在水泥，白云石粉，减水剂的相对掺量不变的条件下，用单元变量的方法分别改变水胶比，以及硅灰、粉煤灰、白云石砂和钢纤维的掺量，探讨了不同配合比设计对样品强度的影响.通过研究发现：水胶比，以及粉煤灰、硅灰、白云石砂的掺量变化对样品的抗压强度影响较大，抗折强度的影响较小，而钢纤维掺量变化对样品的抗压和抗折强度的变化都很明显.最后得出最佳配合比设计为：水胶比为0.16，硅灰、粉煤灰、白云石砂、白云石粉的掺量分别为水泥用量的0.3、0.3、0.9、0.2，钢纤维的掺量为体积分数的2%，减水剂的掺量为胶凝材料总量的2%.制备的混凝土样品脱模后先采用水泥砼标准养护2天，再于90 ℃热水中养护3天，测得样品的抗压强度超过150 MPa，抗折强度达到30 MPa.
Abstract:
To decrease the preparation cost of reactive powder concrete and obtain high strength products ,highcost quartz sand and quartz powder were replaced by lowcost dolomite sand(DS) and dolomite powder(DP)to prepare high strength concrete based on the preparation principle of reactive powder concrete. Three tapes cementing material system consisting of cement(C), silica fume(SF) and fly ash(FA)were used and the waterbinder ratio(W/B) and contents of SF,FA,DS and steel fiber were respectively changed using unit variable method to study the impaction of different mixture ratio on the strength of samples under the relative proportion of C,DP and water reducing agent in a given conditions. The results show that the change of W/B and different contents of SF,FA,DS have strong influence on compressive strength and weak influence on bending strength. But the content of steel fiber has strong influence on both. The optimum mixture ratio is W/B of 0.16 and the mass ratio of SF∶FA∶DS∶DP∶C=0.3∶0.3∶0.9∶0.2∶1.And the volume content of steel fiber is 2%and the mass ratio of water reducing agent to cementing material is 2%.The demoulded concrete samples are firstly cured for two days in concrete standard curing and then placed in 90 ℃ hot water for three days. The compressive strength of samples is more than 150 MPa and bending strength is up to 30 MPa.

参考文献/References:

［1］覃维祖，曹峰．一种超高性能混凝土-活性粉末混凝土 \[J\]．工业建筑，1999，29(4)：132137．［2］Cheyrezy Marcel, Maret Vincent, Frouin Laurent. Microstructural analysis of RPC(Reactive Powder Concrete)\[J\]. Cement and Concrete Research, 1995, 25(7):14911500.［3］Richard Pierre, Cheyrezy Marcel. Composition of reactive powder concretes \[J\].Cement and Concrete Research, 1995, 25(7):15011511.［4］Zanni Helene, Cheyrezy Marcel, Maret Vincent, et al. Investigation of hydration and pozzolanic reaction in Reactive Powder Concrete (RPC) using 29Si NMR \[J\].Cement and Concrete Research, 1996, 26(1):93100.［5］沈旦申．粉煤灰混凝土 \[M\]．北京：中国铁道出版社，1989．［6］何峰，黄政宇．养护制度对活性粉末混凝土(RPC)的强度影响研究\[J\]．混凝土．2000，25(2):3134．［7］中国建筑材料科学研究院.GB/T 2419-2005 水泥胶砂流动度测定方法\[S\]．北京：中国标准出版社，2005.［8］Richard Pierre, Cheyrezy Marcel. Composition of reactive powder concretes \[J\]. Cement and Concrete Research, 1995, 25(7):15011511．［9］姜德民．硅灰对高性能混凝土强度的作用机理研究 \[J\]．建筑技术开发，2001，28(4)：4446．［10］闰光杰，刘培文，余清河．200MPa级活性粉末混凝土抗压强度试验研究\[J\]．建筑结构学报,2007，增刊： 9395．

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备注/Memo

备注/Memo:
收稿日期：20121217作者简介：曹宏（1965），男，江苏盐城人，教授，博士.研究方向：新型碳材料与胶凝材料.
更新日期/Last Update: 2013-04-23