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Impermeability Research of Autoclaved propylene oxide sludge Shell-aggregate Concrete

Journal of Wuhan University of Technology(Materials Science) 2022年第2期37卷 241-247页

作者： MA Hailong CUI Chong YANG Youzhen MA Wentao Archives Ningxia UniversityTinchuan 750021China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Physics Electrical Information Engineering Ningxia UniversityYinchuan 750021China School of Mathematics and Computer Science Ningxia UniversityTinchuan 750021China

We aimed to reuse the propylene oxide sludge(POS).propylene oxide sludge shell-aggregate(POSS-A)and propylene oxide sludge gradient shell-aggregate(POSGS-A)whose main hydrated phase is tobermorite were successfully manufactured by the hydrothermal synthesis of POS and silica materials under the condition of autoclaved(180℃,1.0 MPa)*** of pre-wetting time of coarse aggregate and pressure application mode on the different concretes were *** experimental results show that the concrete with POSS-A as coarse aggregate(POSS-A concrete),the concrete with POS gradient shell-aggregate as coarse aggregate(POSGS-A concrete),sintered aggregate concrete and common concrete,all have excellent impermeability performance whatever the pre-wetting time of coarse aggregate is 0.5 h or 24 h,and the pre-wetting time of coarse aggregate has a negligible influence on the *** influence degree of pressure application mode on the impermeability performance of the sintered aggregate concrete is the greatest among three kinds of concrete,which has a negligible influence on impermeability performance of the other ***-A can be used as a green building light aggregate in hydraulic concrete.

关键词： propylene oxide sludge hydrothermal synthesis autoclaved aggregate impermeability concrete

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Mechanical Properties of Autoclaved Shell-aggregate

引用

Journal of Wuhan University of Technology(Materials Science) 2011年第4期26卷 723-729页

作者：马海龙崔崇 School of Materials Science and Engineering Nanjing University of Science and Technology Institute of Ethnic Preparatory Education Ningxia University

Waste solid propylene oxide sludge （POS） and fly ash were used as main raw material to prepare propylene oxide sludge aggregate （POSA） under the condition of autoclaved （180 ℃,1.0 MPa） curing. Three different test methods namely cylinder compressive strength （CCS）, individual aggregate compressive strength （IACS） and strength contribution rate （SCR） proposed were used to characterize the mechanical properties of the autoclaved POSA. POS shell-aggregate with SCR of 94% were prepared under the hydrothermal synthesis and autoclaved curing. The experimental results indicate that CCS and IACS have good consistency in characterizing mechanical properties of POSA. It is suggested that SCR not only can characterize the strength of POSA core, but also can reflect the effect of shell on the performance of POSA. By means of least square method, relationships between CCS and IACS, CCS and SCR, IACS and SCR were deduced.

关键词： propylene oxide sludge cylinder compressive strength strength contribution rate aggregate individual aggregate compressive strength

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