Fabrication of Unfired Porous Quartz Brick Used the River Sands from the Yangtze River in China

The insulating brick is prepared used low grade quartz sand along the Yangtze River, and the mechanism of porous structure contolment is researched, which lay technological foundation for increasing the performance of insulating brick. The results show the porosity of unfired porous quartz bricks is decreased with increasing the content of quartz sands. When the content of foaming agent is beyond 0.5%, the porosity of unfired porous bricks is increased with increasing the content of foaming agent. When the ratio of materials and water is above 1:1.1, the porosity of unfired porous bricks is decreased with increasing the content of adding water. Through optimizing the technology that using 60% quartz sands, 39% cement, 1% foaming agent and the ratio of materials and water for 1:1.1 are mixed, the unfired porous quartz bricks is produced, the density is 0.628 g/cm3, the porosity is 74.586% and the compression strength is 1.9 MPa, the porous structure of brick is homogeneous distribution, the pore is closed pore.

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Preparation and Characterization of Quartz Porous Ceramic Materials Using the Yangtze River Sand

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.804.52 ◽

2013 ◽

Vol 804 ◽

pp. 52-56

Author(s):

Yan Ping Feng ◽

Zhi Wen Qiu ◽

Xiao Bin Ma ◽

Lei Zhao ◽

Xin Chao Chen ◽

...

Keyword(s):

Yangtze River ◽

Raw Materials ◽

Porous Ceramic ◽

Ceramic Materials ◽

Porous Ceramics ◽

Low Grade ◽

The Yangtze River ◽

Insulation Property ◽

River Sand ◽

Porous Ceramic Materials

In order to lay raw materials foundation for increasing the performance of insulating brick with the low grade quartz sand along the Yangtze River, the quartz porous ceramic materials was researched in this paper. The results show the porosity of the porous quartz ceramics decreased with an increase in the sintering temperature. The pore is like the bowl shape, and the pore is closed pore, which is help to improve the heat insulation property of quartz porous ceramics. The CaSiO4 is produced in the ceramics after sintering processing. The shape is better, and the microstructure is circular and symmetrical pore, which is help to improve the mechanical property of quartz porous ceramics.

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Impacts of urbanization on hydrology in the Yangtze River Delta, China

Water Science & Technology ◽

10.2166/wst.2010.391 ◽

2010 ◽

Vol 62 (6) ◽

pp. 1221-1229 ◽

Cited By ~ 28

Author(s):

Xu Youpeng ◽

Xu Jintao ◽

Ding Jinjia ◽

Chen Ying ◽

Yin Yixing ◽

...

Keyword(s):

Water Resources ◽

Yangtze River ◽

Yangtze River Delta ◽

River Delta ◽

Low Grade ◽

Hydrological Process ◽

The Yangtze River ◽

Network Systems ◽

Process Of Urbanization ◽

The Yangtze River Delta

The Yangtze River Delta is one of the most developed regions in China and the rapid development of urbanization have greatly influenced regional hydrology and water resources. Taking several typical urbanizing areas in the Yangtze River Delta as examples, this paper probes into the impacts of urbanization on hydrologic cycle and hydrological process with the support of RS, GIS and hydrological model. The research centers on the impacts of urbanization on precipitation, hydrological process, river networks, and water environment in some typical cities. The results show that: (1) Urban rain island effect is not evident when the process of urbanization is slow, while the differences of annual precipitation and flood season precipitation between urban and suburban areas increased to a certian extent in the booming stage of urbanization. (2) The annual runoff depth and the runoff coefficient increased with the development of urbanization, and the effect will be more notable when the urban areas expand to a certain size; (3) River network systems, especially low-grade rivers have been greatly destroyed in the process of urbanization, which increases the risk of flood and water degradation, so it is very important to protect natural river systems. Based on the results, some proposals of sustainable utilization and protection of water resources is also addressed.

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Influence of Sintering Temperature on the Properties of Porous Quartz Ceramics via the Atmospheric Pressure Sintering Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.415-417.1009 ◽

2011 ◽

Vol 415-417 ◽

pp. 1009-1012

Author(s):

Jie Guang Song ◽

Fang Wang ◽

Yin Yan Ju ◽

Ming Han Xu ◽

Shi Bin Li

Keyword(s):

Atmospheric Pressure ◽

Yangtze River ◽

Sintering Temperature ◽

Raw Material ◽

Price Ratio ◽

The Yangtze River ◽

River Sand ◽

Sintering Method ◽

Quartz Ceramics ◽

Porous Quartz

Porous quartz ceramics were produced using river sand from the Yangtze River in China as the raw material via the atmospheric pressure sintering method. The influence of the sintering temperature on the density, the porosity, the porous structure and the outside shape of ceramics were investigated in this paper.The conclusions show that the sintering temperature increased, the microstructure of the samples changed accordingly and the density increased, while the porosity decreased, the micropores edge gradually become smooth. The optimum sintering temperature of porous quartz ceramics was obtained at 1100 °C as determined by an analysis of the performance price ratio of the porous quartz ceramics, the density is 1.25g/cm3, the porosity is 49.5%, the outside shape is regular, the micropore edge are smooth.

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