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Experimental Study on Mechanical Properties of Concrete with Recycled Aggregates and Admixtures

Author: HuangWenFeng
Tutor: ZouChaoYing
School: Harbin Institute of Technology
Course: Structural Engineering
Keywords: Recycled concrete Mechanical properties Stress - strain relations Replacement ratio Admixture
CLC: TU528
Type: Master's thesis
Year: 2007
Downloads: 437
Quote: 4
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Abstract


This topic is Heilongjiang Province Natural Science Foundation of recycled concrete mechanical properties and microstructure of Experimental study \With the development of the construction industry , construction waste is also increasing , which is a large part of the waste concrete . Huge amount of waste concrete processing in addition to amazing cost , but also lead to very serious environmental problems . In addition, the huge demand of concrete requires a lot of sand and gravel aggregate , with natural gravel mining , increasing depletion of natural aggregate resources . Recycled concrete technology based on environmental protection and sustainable development thought can be a good solution to this problem. This article outlines the recycled concrete impact on the environment as well as its research status at home and abroad . According to the current recycled concrete , recycled aggregate and mechanical properties of recycled concrete admixtures substituted . Preparation of recycled concrete aggregate by recycled concrete aggregate domestic access method to analyze and learn from foreign mechanical broken jaw crusher . Meanwhile, according to the reference concrete sand , stone quality standards and standard test method \Experimental results show that , compared with the natural aggregate , recycled aggregate low density , water absorption , high porosity , low intensity . 120 cube specimens compressive strength test and splitting tensile strength test , the focus of recycled aggregate type , the replacement ratio of fly ash , slag replacement ratio of fly ash and slag doped double substitution rate and other factors on the recycled concrete compressive strength, splitting tensile strength of the impact of law , and regression analysis has been recycled concrete compressive strength and splitting tensile strength of the relationship . The use of electro-hydraulic servo MTS testing machine and its supporting acquisition system measured scored 57 recycled concrete prism specimens stress - strain curve of . According to the results of the peak stress , peak strain , the lateral deformation coefficient and the variation of the modulus of elasticity , the establishment of recycled concrete stress - strain curve equation . This article provides a basis for further research on regeneration performance of concrete structures .

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CLC: > Industrial Technology > Building Science > Building Materials > Non-metallic materials > Concrete and concrete products
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