蒸压加气混凝土中建筑垃圾、粉煤灰的利用研究-文献详情-维普官网

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蒸压加气混凝土中建筑垃圾、粉煤灰的利用研究认领

作者：

Zuhair Nadeem

学位授予单位：

东华大学

摘要：

China's industries are growing rapidly,and with that,waste production is also increasing.Construction and demolition waste,industrial waste has become a significant concern,it is because of rapid urbanization,economic growth,the tremendous expansion of cities,rapid development from rural to an urban area,rising community living standards have speeded up the generation of construction and demolition waste considerably,due to which China is experiencing an unprecedented increase in construction and demolition waste in human history.This generated waste needs to be utilized or recycled in some form.Autoclaved aerated concrete is a type of lightweight concrete material that can be used as an alternating eco-friendly green building material that can be used for construction purposes.It is widely composed of raw materials such as cement,quicklime,sand,gypsum,and an aerating agent like aluminum powder.The paper briefly discusses the developing concerns over construction and demolition waste,and a way to utilize it in autoclaved aerated concrete.　　In the first part of this paper,different mix designs of non-autoclaved aerated concrete were done to understand the process and to know the effects of aluminum powder,with varying ratios of raw material.Different concentrations of construction and demolition waste were taken from5%to40%to study the effects on the concrete material.Compression strength tests were done after28days.All the samples were not autoclaved,and one type of waste was used.The results showed that the density of the material increased with a decrease in aluminum powder.　　In the second part of this paper,different mix designs of autoclaved aerated concrete were done with different types of waste to get the optimum strength sample.Concentrations of construction and demolition waste were taken from5%to15%,and chemical waste from3%to10%t Compression strength tests was done and compared with the previous results.All the samples were autoclaved,and two types of waste were used.The results showed that the sample made with15%construction and demolition waste,that was autoclaved at pressure1Mpa and temperature200℃showed better mechanical strength of1.9Mpa.　　In the third part,the experimental series was designed with the highest40%construction and demolition waste.The designed series was as follows,construction and demolition waste(5%,10%,15%....40%)and fly ash waste(35%,30%,25….0%),respectively,keeping the aerating agent at0.06%that is aluminum powder.The rest of the material composition was constant Cement28%,Quick Lime30%,Gypsum2%and water to raw material ratio are0.65.The compressive strength of the material was checked after autoclaving at200℃temperature and1Mpa Pressure for6hours.The results showed that the sample with20%construction and demolition waste and20%fly ash waste gave the best result.This study successfully designed the Autoclave Aerated Concrete material according to the Chinese National Standards GB and recycled the waste generated by various industries mainly from the construction sector.

摘要译文

关键词：

蒸压加气混凝土; 建筑垃圾; 粉煤灰; 掺入量

学位年度：

2020

学位类型：

硕士

学科专业：

Environmental Engineering

导师：

Wei Qunshan

中图分类号：

TU528.21;TU528.041[集料（骨料）及掺合料];TU8[房屋建筑设备];TU6[建筑施工机械和设备]

学科分类号：

080501[材料学];081303[建筑技术科学];081408[土木工程材料]