In order to explore the internal curing mechanism of sepiolite in cement-based materials,the effects of sepiolite on the water consumption of standard consistency,setting time,viscosity,strength,pore structure charact...In order to explore the internal curing mechanism of sepiolite in cement-based materials,the effects of sepiolite on the water consumption of standard consistency,setting time,viscosity,strength,pore structure characteristics,micro-hardness characteristics and two-dimensional surface characteristics of cement paste were studied,respectively.The experimental results show that the water consumption of standard consistency increases linearly with the increase of sepiolite content.The setting time and viscosity are also lengthened and increased with the addition of sepiolite,respectively.When the content of sepiolite exceeds 5%,the strength of the specimen increases significantly.The BET results show that the pore structure of the interfacial transition zone(ITZ)in hardened cement paste(HCP)with sepiolite is optimized after curing for28 d and its pore volume content with below 10 nm is decreased,especially for the specimen with a lower watercement ratio.The characteristics of microhardness and strength of specimens have the same law.Backscattered electron image(BSE-IA)shows that the ITZ of the specimen with sepiolite is denser and the unhydrated cement particles are less than the reference specimen.展开更多
一、教学背景(一)教学内容Pig and Pepper是《Hi Classics品读文学经典》Alice’s Adventures in Wonderland的第三章,属于“人与自我”主题。What:Alice’s Adventures in Wonderland主要讲述了小女孩爱丽丝(Alice)某天做的一个天马行...一、教学背景(一)教学内容Pig and Pepper是《Hi Classics品读文学经典》Alice’s Adventures in Wonderland的第三章,属于“人与自我”主题。What:Alice’s Adventures in Wonderland主要讲述了小女孩爱丽丝(Alice)某天做的一个天马行空的梦,其内容时而平常,时而惊险,时而荒诞,时而深邃,但“善良、勇气和成长”的主题贯穿始终。展开更多
基金Funded by the Natural Science Foundation of China(No.51408380)the Science and Technology Plan of He Bei Province(No.E2021210033)the Scientific and Technological Development Funds of the Central Government Shall Guide Local(No.216Z3801G)。
文摘In order to explore the internal curing mechanism of sepiolite in cement-based materials,the effects of sepiolite on the water consumption of standard consistency,setting time,viscosity,strength,pore structure characteristics,micro-hardness characteristics and two-dimensional surface characteristics of cement paste were studied,respectively.The experimental results show that the water consumption of standard consistency increases linearly with the increase of sepiolite content.The setting time and viscosity are also lengthened and increased with the addition of sepiolite,respectively.When the content of sepiolite exceeds 5%,the strength of the specimen increases significantly.The BET results show that the pore structure of the interfacial transition zone(ITZ)in hardened cement paste(HCP)with sepiolite is optimized after curing for28 d and its pore volume content with below 10 nm is decreased,especially for the specimen with a lower watercement ratio.The characteristics of microhardness and strength of specimens have the same law.Backscattered electron image(BSE-IA)shows that the ITZ of the specimen with sepiolite is denser and the unhydrated cement particles are less than the reference specimen.
文摘一、教学背景(一)教学内容Pig and Pepper是《Hi Classics品读文学经典》Alice’s Adventures in Wonderland的第三章,属于“人与自我”主题。What:Alice’s Adventures in Wonderland主要讲述了小女孩爱丽丝(Alice)某天做的一个天马行空的梦,其内容时而平常,时而惊险,时而荒诞,时而深邃,但“善良、勇气和成长”的主题贯穿始终。
