scholarly journals Effects of nano-SiO2, nano-CaCO3 and nano-TiO2 on properties and microstructure of the high content calcium silicate phase cement (HCSC)

2022 ◽  
Vol 314 ◽  
pp. 125377
Author(s):  
Congqi Luan ◽  
Yong Zhou ◽  
Yongyi Liu ◽  
Zunchao Ren ◽  
Jinbang Wang ◽  
...  
Keyword(s):  
Calcium Silicate ◽  
Silicate Phase ◽  
Nano Tio2 ◽  
Nano Sio2

Strength and Drying Shrinkage of Pavement Concrete with Nano-Particles

2013 ◽  
Vol 662 ◽  
pp. 182-185
Author(s):  
Mao Hua Zhang ◽  
Hong Guang Wang
Keyword(s):  
Chemical Properties ◽  
Drying Shrinkage ◽  
Nano Particles ◽  
Shrinkage Rate ◽  
Nano Materials ◽  
Nano Tio2 ◽  
Science Field ◽  
Ordinary Concrete ◽  
Nano Sio2 ◽  
Pavement Concrete

With the development of national economy in Mainland China, the heavier vehicles and traffic flow have arisen in highway transportation. Concrete pavement has high strength and good durability, and thus is widely used in high-grade highway. Due to the small dimension, nano- materials have many unique physical and chemical properties, and become the focus of material science field. In this thesis, based on the unique characteristics of nano-materials, the ordinary concrete with nano-SiO2 or nano-TiO2 is prepared to research the drying shrinkage of pavement concrete. The test results indicate that the concrete with nano-SiO2 and nano-TiO2 in the amount of 2.0% and 1.0% by weight of binder have the respectively biggest drying shrinkage rate of the same concrete type, which are significantly increased than the ordinary concrete. After 28 days, the dying shrinkage rate of the concrete with nano-TiO2 is 1.6 times to the ordinary concrete.

Precipitation Behavior of V-Enrichment Mineral in Steelmaking Slag Bearing Vanadium Modified by SiO2

2013 ◽  
Vol 295-298 ◽  
pp. 1729-1734
Author(s):  
Liu Shun Wu ◽  
Yun Zhou ◽  
Yuan Chi Dong
Keyword(s):  
Calcium Silicate ◽  
Converter Slag ◽  
Dicalcium Silicate ◽  
Experimental Results ◽  
Steelmaking Slag ◽  
Precipitation Behavior ◽  
Silicate Phase ◽  
Rich Phase ◽  
Addition Amount

In order to concentrate vanadium in converter slag bearing vanadium, the effect of SiO2 on behavior of vanadium in the process of enriching was studied. Experimental results show that, during cooling, dicalcium silicate containing vanadium and phosphorus precipitate first from original slag. For original with 7% SiO2, most of vanadium dissolves in calcium silicate phase. However, the proportion of dicalcium silicate is big. For slag modified by 12% SiO2, during cooling, two vanadium-rich minerals precipitate firstly, i.e. Ca3(V,P)2O8(30-33%V2O5) and Ca3(V,P)2O8•nCa2SiO4 (14-31%V2O5), then 3CaO•2SiO2 (2-4%V2O5) generates. With addition amount of SiO2 increasing, the proportion of 3CaO•2SiO2 decreases gradually, and the content of vanadium in vanadium-rich phase increases gradually. So appropriate SiO2 addition can suppress the precipitation of Ca2SiO4 and Ca3•Si2O7, and promote the generation of vanadium-rich phase.

Composite nano-structured calcium silicate phase change materials for thermal buffering in food packaging

2008 ◽  
Vol 8 (3-4) ◽  
pp. 508-511 ◽  
Author(s):  
James H. Johnston ◽  
James E. Grindrod ◽  
Margaret Dodds ◽  
Katrin Schimitschek
Keyword(s):  
Phase Change ◽  
Calcium Silicate ◽  
Food Packaging ◽  
Phase Change Materials ◽  
Silicate Phase ◽  
Thermal Buffering

New Data for the Calcium Silicate, ‘Phase Z’

Nature ◽  
1960 ◽  
Vol 188 (4757) ◽  
pp. 1187-1188 ◽  
Author(s):  
D. M. ROY ◽  
J. A. GARD ◽  
A. W. NICOL ◽  
H. F. W. TAYLOR
Keyword(s):  
Calcium Silicate ◽  
Silicate Phase

Effect of Various Nanoparticles on Friction and Wear Properties of Glass Fiber Reinforced Epoxy Composites

2010 ◽  
Vol 150-151 ◽  
pp. 1106-1109 ◽  
Author(s):  
Yong Kun Wang ◽  
Li Chen ◽  
Zhi Wei Xu
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Glass Fiber ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Specific Wear Rate ◽  
Wear Properties ◽  
Nano Tio2 ◽  
Nano Sio2 ◽  
Multi Walled Carbon Nanotubes

The glass fiber (GF) reinforced epoxy (EP) composites filled by nano-Al2O3, nano-TiO2, nano-SiO2 and multi-walled carbon nanotubes (MWCNTs) were prepared. The friction and wear behavior of composites under dry condition were evaluated with block-on-ring friction and wear tester. The morphologies of the worn surfaces of the composites were analyzed by scanning electric microscopy (SEM). The results show that 0.5 wt% MWCNTs and nano-TiO2 can significantly lower the friction coefficient and specific wear rate of composites, respectively, while 0.5 wt% nano-SiO2 and nano-Al2O3 can slightly lower the friction coefficient and specific wear rate of the composites.

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