再生碎砖混凝土应用于农田土渠硬化的可行性研究
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摘要
针对配套落后、渗漏严重的农田土渠进行硬化的需求,对不同粉煤灰取代率的再生碎砖混凝土进行强度、和易性、抗渗性研究。对掺入不同附加水的再生碎砖混凝土进行强度与和易性试验,得到按照粗骨料80%~90%的吸水率掺入附加水的再生碎砖混凝土强度与和易性满足要求。试验结果表明:强度等级为C10的再生碎砖混凝土抗渗性随着粉煤灰取代率的增加先升高再降低,抗渗等级均可满足农田土渠硬化的要求,且具有较高的强度,和易性良好。最后通过经济性分析得出再生碎砖混凝土比普通混凝土的成本低10%左右,再生碎砖混凝土在农田土渠硬化工程中具有实际应用价值。
To meet the demand of soil hardening of the backward and severe seepage of soil channel in farmland,the strength,workability and impermeability of recycled brickbat concrete with different fly ash substitution rate were studied.The strength and workability of the recycled brickbat concrete with different additional water was tested and the recycled brickbat concrete with the addition of 80%~90% water absorption of the coarse aggregate has the high strength and good workability.The results showed that the impermeability of recycled brickbat concrete with strength grade C10 firstly increased and then decreased with the increase of fly ash substitution rate.The impervious grade of the studied recycled brickbat concrete can meet the requirements of soil channel hardening in farmland.Finally,the economic analysis shows that the cost of recycled brick aggregate concrete is about 10%lower than that of ordinary concrete,and the recycled brick concrete has practical application value in the project of soil channel hardening in farmland.
To meet the demand of soil hardening of the backward and severe seepage of soil channel in farmland,the strength,workability and impermeability of recycled brickbat concrete with different fly ash substitution rate were studied.The strength and workability of the recycled brickbat concrete with different additional water was tested and the recycled brickbat concrete with the addition of 80%~90% water absorption of the coarse aggregate has the high strength and good workability.The results showed that the impermeability of recycled brickbat concrete with strength grade C10 firstly increased and then decreased with the increase of fly ash substitution rate.The impervious grade of the studied recycled brickbat concrete can meet the requirements of soil channel hardening in farmland.Finally,the economic analysis shows that the cost of recycled brick aggregate concrete is about 10%lower than that of ordinary concrete,and the recycled brick concrete has practical application value in the project of soil channel hardening in farmland.
引文
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[2]王雪萍.再生混凝土力学性能试验研究及其配合比优化[D].武汉:武汉理工大学,2008.WANG Xueping.Experimental research on mechanical properties of recycled aggregate concrete and optimization of mix proportion[D].Wuhan:Wuhan University of Technology,2008.(in Chinese)
[3]孙越男.微粉的粒度组合对水泥混凝土性能的影响[D].哈尔滨:哈尔滨工业大学,2008.SUN Yuenan.Partical combination of fine power effect on performance of cement and concrete[D].Harbin:Harbin Institute of Technology,2008.(in Chinese)
[4]张敏,韦杰中,孙凌云,等.施工工艺对再生碎砖混凝土性能影响的研究[J].混凝土,2017(4):112-113,121.ZHANG Min,WEI Jiezhong,SUN Lingyun,et al.Research on recycle brickbat aggregate concrete with different construction technology[J].Concrete,2017(4):112-113,121.(in Chinese)
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[6]SL 191—2008.水工混凝土结构设计规范[S].北京:中华人民共和国水利部,2008.SL 191—2008.Design code for hydraulic concrete structure[S].Beijing:Ministry of Water Resources of the People’s Republic of China,2008.(in Chinese)
[7]田钟维.基于LCA-LCC的再生混凝土环境经济性能评估研究[D].杭州:浙江大学,2012.TIAN Zhongwei.Study on environmental economic performance evaluation of recycled concrete based on LCA-LCC[D].Hangzhou:Zhejiang University,2012.(in Chinese)
[8]广西壮族自治区建设工程造价管理总站.广西壮族自治区建筑装饰装修工程人工材料配合比机械台班基价[M].北京:中国建筑工业出版社,2013:6,211-230.Guangxi Zhuang Autonomous Region Construction Project Cost Management Terminal.Construction decoration engineering cost quota in Guangxi Zhuang Autonomous Region[M].Beijing:China Construction Industry Press,2013:6,211-230.(in Chinese)
[9]广西壮族自治区建设工程造价管理总站.广西壮族自治区建筑装饰装修工程费用定额[M].北京:中国建筑工业出版社,2013:10-12.Guangxi Zhuang Autonomous Region Construction Project Cost Management Terminal.Construction cost of building decoration in Guangxi Zhuang Autonomous Region[M].Beijing:China Construction Industry Press,2013:10-12.(in Chinese)